Mobile Crane

Mobile Crane

A mobile crane is "a cable-controlled crane mounted on crawlers or rubber-tired carriers" or "a hydraulic-powered crane with a telescoping boom mounted on truck-type carriers or as self-propelled models." They are designed to easily transport to a site and use with different types of load and cargo with little or no setup or assembly.
Mobile cranes generally operate a boom from the end of which a hook is suspended by wire rope and sheaves. The wire ropes are operated by whatever prime movers the designers have available, operating through a variety of transmissions. Steam engines, electric motors, and internal combustion engines (IC) have all been used. Older cranes' transmissions tended to be clutches. This was later modified when using IC engines to match the steam engines' "max torque at zero speed" characteristic by the addition of a hydrokinetic element culminating in controlled torque converters. The operational advantages of this arrangement can now be achieved by electronic control of hydrostatic drives, which for size and other considerations is becoming standard. Some examples of this type of crane can be converted to a demolition crane by adding a demolition ball, or to an earthmover by adding a clamshell bucket or a dragline and scoop, although design details can limit their effectiveness.

Tower Crane

Tower Crane

A crane to lift and lower materials and to move them horizontally that can be used both as a hoist, wire ropes or chains, and sheaves, a type of machine is equipped with. It mainly heavy lifting and other places used for transporting them. Creating a mechanical advanta

ge and thus move loads beyond the normal capacity of a person to one or more uses of simple machines. Cranes for the movement of goods and the accumulation of heavy equipment in the construction industry for the manufacturing industry, for loading and unloading freight transportation industry are working.
The first construction cranes were invented by the ancient Greeks and donkeys such as men or beasts of burden, was powered by. These cranes were used for the construction of tall buildings. The large cranes to lift heavy weights, the use of human treadwheels employment, was developed. In the High Middle Ages, harbor cranes and ships free download to help with the construction of these was introduced - some extra strength and stability of the towers were built of stone. The earliest cranes were constructed from wood, but iron, iron and steel took over with the coming of the Industrial Revolution were cast.
hoists in watermills and windmills harnessed the natural power that can be driven by, for several centuries, power, men or animals were provided by physical exertion. First 'mechanical' power was provided by steam engines, the earliest steam crane used in the late 20th century in very well with the rest, 18th or 19th century, is being introduced.use the system.
According to a specific use - Cranes forms are available in a huge variety. Sometimes size used for high buildings the tallest tower cranes, to the smallest JIB cranes used inside workshops, carry. Mini cranes from reaching tight spaces also to facilitate the construction, which is used for high buildings. In the end, we usually build oil rigs and salvage sunken ships to use large floating cranes can find.
Some strictly a crane lifting machines do not fit the above definition, but in general, such as the stacker cranes and cranes loader cranes, called

crane

Crane

A crane to lift and lower materials and to move them horizontally that can be used both as a hoist, wire ropes or chains, and sheaves, a type of machine is equipped with. It mainly heavy lifting and other places used for transporting them. Creating a mechanical advantage and thus move loads beyond the normal capacity of a person to one or more uses of simple machines. Cranes for the movement of goods and the accumulation of heavy equipment in the construction industry for the manufacturing industry, for loading and unloading freight transportation industry are working.
The first construction cranes were invented by the ancient Greeks and donkeys such as men or beasts of burden, was powered by. These cranes were used for the construction of tall buildings. The large cranes to lift heavy weights, the use of human treadwheels employment, was developed. In the High Middle Ages, harbor cranes and ships free download to help with the construction of these was introduced - some extra strength and stability of the towers were built of stone. The earliest cranes were constructed from wood, but iron, iron and steel took over with the coming of the Industrial Revolution were cast.
hoists in watermills and windmills harnessed the natural power that can be driven by, for several centuries, power, men or animals were provided by physical exertion. First 'mechanical' power was provided by steam engines, the earliest steam crane used in the late 20th century in very well with the rest, 18th or 19th century, is being introduced.use the system.
According to a specific use - Cranes forms are available in a huge variety. Sometimes size used for high buildings the tallest tower cranes, to the smallest JIB cranes used inside workshops, carry. Mini cranes from reaching tight spaces also to facilitate the construction, which is used for high buildings. In the end, we usually build oil rigs and salvage sunken ships to use large floating cranes can find.
Some strictly a crane lifting machines do not fit the above definition, but in general, such as the stacker cranes and cranes loader cranes, as is known.

Drilling machine

Drilling Machine 

 At one end of the drill attachment gripped by a chuck and is rotated while pressed against the target material. Cutting tool tip, and sometimes the edges, is cut in the target material. This crushing and workpiece (SDS masonry drill), countersinking, counterboring, or removing pieces of other operations, small particles (oil drilling) away from the grinding of thin shavings (twist drill or auger bits) to be slicing off Can.

Practice common woodworking, metalworking, construction and do-it-yourself projects. Specially designed practice medicine, and other applications used in space missions. Such as the ability to exercise power and performance features, are available with a wide variety.

Around 35,000 BC, sapiens sapiens discovered the benefits of the application of rotary tools. It  Sometimes it was associated with a flint point drill, a smooth rod, led to. rudimentarily a pointed rock, and between the boring a hole through the material being spun will contain, and was found among the palms. The Mayans, including many of the world was used by ancient civilizations. [Thus, bone, ivory, shells and antlers hole samples as soon as possible, found, are by far the Upper Paleolithic.

A rotary movement in a back and forth motion as change the smell drill (drill collar), the exercise machine, and the surroundings can be traced back to 10,000 years ago. Tying a cord around a stick, and then a stick (a bow) connecting the ends of the string to the end of a user to drill faster and more efficiently was discovered that allowed. Basically, bow-drill fire the old woodwork, stones were used and used in dentistry. Archeologist 11 teeth that had been drilled with a total of 9 bodies of adults, around 7,500-9,000 years ago, dating from the time of Harappan Mehrgrath, a Neolithic grave yard in Pakistan, discovered.  There are Egyptian hieroglyphs depicting carpenter and practice using the bow bead makers in a tomb in Thebes. These devices are being used in Egypt from the earliest evidence dates back to around 2500 BC.  bow practice widely used during ancient times in Europe, Africa, Asia and North America, and was spread through is still used today. Over the years quite a bit of practice bow and strap variations either by content or lighting a fire of boring is ready for use.

Tunnel boring machine

 Tunnel Boring Machine

A "mole" is known as a tunnel boring machine (TBM), through a variety of soil and rock strata with a circular cross-section is a machine used for digging tunnels. Through some hard rock to the sand can produce. 19.25 meter diameter tunnel to date (done with micro-TBMs) can reach one meter. Tunnels of less than one meter in diameter or trenchless construction methods generally horizontal directional drilling or instead is using TBMs.
Tunnel boring machines, drilling and blasting (D & B) in rocks and soil traditional "hand mining" as an alternative to the methods used. TBMs to limit disturbance to the surrounding ground and producing a smooth tunnel wall advantages. This significantly reduces the cost of lining the tunnel, and it makes it suitable for use in large urban areas. The main disadvantage is the cost. TBMs are expensive to build, and can be difficult to transport. However, as modern tunnels longer than drill and blast tunnel boring machines cost is actually lower. Tunneling with TBMs is much more efficient and shorten completion times because of the results.
19.25 meters in diameter, the largest TBM, (63 feet), Orlovski tunnel Herrenknecht AG, in St. Petersburg was built by a project. Machine to bore through soft ground including sand and clay was built for. Herrenknecht AG also built the world's largest diameter hard rock TBM excavation area :; 192 square meters, the thrust 39.485 T, a total weight of 4,500 tons, total installed capacity of 18 MW "Martina" (excavation diameter of 15.62 meters, total length 130 m, the annual energy consumption of 62,000,000 kWh) near Florence) Pass owned and Italian motorway A1 ("Variante di Valico A1" for the gallery Sparvo Costruzioni SpA in the Italian construction company Generali (the Group) is operated by.
The largest diameter hard rock TBM, 14.4 meters, Robbins Company for Canada's Niagara Tunnel Project was developed by. Niagara Falls hydroelectric tunnel boring machine was used below. The tunneling machine which is providing an additional hydropower tunnel Sir Adam Beck hydroelectric dams of the "Big Becky" was declared.
In 2013, Hitachi Zosen Corporation Highway 99 tunnel in Seattle for the project, an earth pressure balance TBM delivered to the United States. Bore 57.5 feet (17.45 meters).

Hard Rock TBMs

Hard rock, either shielded or open type TBMs can be used. Hard Rock TBMs cutter head installed in all types of rock excavation using the disc cutter. Disc cutter in front of the machine to chip away at the stone, which in turn, creates fractures in the rock compressive stress, called the tunnel face. Rock tunnel excavation known as muck, muck cars or conveyors for removal machine moves through a system where a belt conveyor, is transmitted through the hole in the head.
Rock TBMs type open rear area, leaving the field open for support, there is no shield. To further machine that pushes against the walls of the tunnel by a gripper system uses. Ungripped the only one who will drive the gripper shoes Wirth as in the case of the machine, while the machine continues to push the side walls can be diverted. Then the machine will push hard to get hold off. At the end of a stroke, the machine behind the legs are lowered and hold propel cylinders are retracted. Boring cycle to propel the cylinder retraction of the gripper assembly repositions. Hold the rear legs lifted, are extended, and begins boring again. When other machines as open type, or main beam, TBM do not install it behind the concrete segments. Instead, the ring beam like rock, rock bolts, shotcrete, and steel straps, color steel (2011 Pakistan Awami Tehreek) and wire mesh (Stack, 1995) as the support is held using methods .
In fractured rock, hard rock TBMs shielded behind the machine unstable tunnel segments erect concrete walls to support, which can be used. Double Shield TBMs are two modes; strengthening the grip against the tunnel walls can advance. Unstable, fractured ground, pressed against the back of the machine tunnel segments push the thrust cylinder is moved. The impact from the fragile walls of the tunnel is the main thrust forces. Single Shield TBMs work in the same way, but the only concrete classes (Stack, 1995), as can push off against, is only used in fractured ground.

Soft ground TBMs

Earth pressure balance machines (EPB), slurry shield (s) and open-face type soft ground, TBMs are three main types. Both types of machines shut off the concrete segments for further pushing forward thrust by using cylinders, Single Shield TBMs work. Earth pressure balance machines with 7 times less than the pressure used in soft ground. Not only does the disc cutter cutter head, but instead of tungsten carbide cutting bits, carbide cutters, disk, drag the picks and / or a combination of hard rock disc cutters. The face of the tunnel excavation material is used to balance the pressure gets its name because the EPB. Archimedes screw spoil pressure through the extraction rate and the advance rate is maintained by controlling the cutterhead. Such as bentonite, polymers and additives such as foam to increase the stability of the ground ahead of the face can be injected.
Archimedes screw too much water pressure or a plug-in can not be set so high so that granular soil conditions (sand and gravels) are, with slurry shield TBMs need soft ground. cutterhead hydrostatic pressure which applies pressure on the excavation face is filled with slurry. Usually the slurry out of the tunnel, a slurry separation plant before being pumped back to the cutterhead out of material excavated by mixing as a means of transport works. Slurry separation plants that can be reused in the construction process so that the slurry particles away from the spoil of a multi-stage filtration system,. Slurry 'cleared' the excavated materials which can be used depending on the particle size. Spoil slurry particle size was less than that of the bentonite clay as the reason, slurry TBMs silts and clays are suitable for. In this case, the slurry can be recycled water, and water is pressed from the mud pie, divided into.
Open face being dug into the soft ground TBMs face of the earth for a short period of time will stand with any support rely on the fact that - so with a strength of up to 10MPa or for use in rock types makes them suitable, and with low water flows. In the face of more than 10 meters in size, it can be excavated. 150MM face shield to the inside edge using a backactor arm or head is excavated. The shield on the front slope forwards and rigid circular shape is jacked off the ground. Sometimes the support of precast concrete, or SGI (spheroidal graphite iron) is provided by the use of, or close support has been built until a complete ring segments that are supported. A final segment, called key, wedge-shaped, and the TBM shield circular cut by the cutter against left until the ring expands. Many variations of this type of TBM exist.
TBMs use high pressure relieves the need for large numbers of workers, while sometimes slurry shield TBMs a caisson system is set up on the cutting head. [9] [10] inspection, maintenance and repair to the place of medical workers entering the "Dive" fit as approved and to be trained in the operation of the locks.

Backup Systems

Behind all types of tunnel boring machines, the completion of the tunnel in part, known as system backup support are trailing the deck. Located on backup support mechanisms may include: pre-cast segments of the transport conveyors or other systems to remove manure, slurry pipelines if applicable, control room, electrical systems, construction, ventilation and mechanisms.Urban tunneling and near-surface tunnel
The undisturbed ground level urban tunnel that particular need. This means it is necessary to avoid ground subsidence. Soft ground in the normal course of procedure and tunnel construction is to maintain the soil pressure. Especially in different segments, something difficult to do so (for example, the upper part of the tunnel face and wet sand bottom in a region where the boring through hard rock) is.
And millionaires such as the EPB control with positive face TBMs ,, used in such circumstances. Both types (EPB and SS) properly operated and if the ground conditions are well documented, so reducing the risk of surface subsidence and voids are capable of.
Tunnel in urban environments, the other tunnels, existing utility lines and deep foundations need to be addressed in the initial planning stages. Infrastructure projects for other measures to reduce any harmful effects must adjust.

slump test instruments

Slump test instruments

The concrete slump test is an empirical test that measures the workability of fresh concrete.

More specifically, it measures the consistency of the concrete in that specific batch. This test is performed to check the consistency of freshly made concrete. Consistency is a term very closely related to workability. It is a term which describes the state of fresh concrete. It refers to the ease with which the concrete flows. It is used to indicate the degree of wetness. Workability of concrete is mainly affected by consistency i.e. wetter mixes will be more workable than drier mixes, but concrete of the same consistency may vary in workability. It is also used to determine consistency between individual batches.

The test is popular due to the simplicity of apparatus used and simple procedure. Unfortunately, the simplicity of the test often allows a wide variability in the manner that the test is performed. The slump test is used to ensure uniformity for different batches of similar concrete under field conditions,:127,128 and to ascertain the effects of plasticizers on their introduction.:134 In India this test is conducted as per IS specification.

The slumped concrete takes various shapes, and according to the profile of slumped concrete, the slump is termed as true slump, shear slump or collapse slump. If a shear or collapse slump is achieved, a fresh sample should be taken and the test repeated. A collapse slump is an indication of too wet a mix. Only a true slump is of any use in the test. A collapse slump will generally mean that the mix is too wet or that it is a high workability mix, for which slump test is not appropriate.[1]:128[3] Very dry mixes; having slump 0 – 25 mm are used in road making, low workability mixes; having slump 10 – 40 mm are used for foundations with light reinforcement, medium workability mixes; 50 - 90 for normal reinforced concrete placed with vibration, high workability concrete

electronics level machine

Electronics level machine

Land surveys or survey points and the distances and angles between them to determine the position of the terrestrial or three-dimensional technology, profession and science. A surveyor is a professional survey., or other purposes such places, is used to set sales.

Surveyors mathematics (geometry and trigonometry), physics, engineering, and working with elements of the law. Total stations, robotic total stations, GPS receivers, prisms's, 3D scanners, radios, handheld shots, Digital Level, and use surveying equipment like software.

Surveying the human environment since the beginning of recorded history is a factor in development. Planning and construction process most types need it. The transportation, communications, mapping, and land ownership is used in the definition of legal boundaries.

Since humans first large structures underlying surveyance has occurred. Stonehenge prehistoric monument (c. 2500 BC) The prehistoric surveyors using peg and rope geometry was determined by

In ancient Egypt, a rope stretcher annual flooding of the Nile to re-establish the boundaries of the use of simple geometry. Great Pyramid of Giza nearly perfect squareness and north-south orientation, built c. 2700 BC, surveying the Egyptians' command declares. Groma instrument originated in Mesopotamia (early 1st Millennium BC)

Hui Liu published his work in mathmetician 263 Sea Island Mathematical Haidao suanjing or manual measurement methods described in the distant objects.

Land Surveyors Romans recognized as a profession. He's like the Roman Empire conquered territories (300 AD) was known as the Roman Surveyors Gromatici as tax registers, which were distributed under the primary measurement.

In medieval Europe, beating the boundaries of a village or parish maintained. This gathering of a group of residents and the parish boundaries to establish a communal memory or practice of walking around the village. Young Boys memory lasted as long as possible to ensure there was added.

In England, William the Conqueror all land owners in the Domesday Book of 1086. The name was registered, he owned land, soil quality, and sector-specific information content and the inhabitants of the territory of the Commission. It did not include maps showing exact locations.

Brick maker machine

Brick maker machine

Bricks machines are a widely used name for different kinds of brick making ma equipment or machine

. Generally speaking, Bricks machines can include clay brick making machine, concrete bricks machines, AAC bricks machines

, fly ash brick making machine and so on. Nowadays, our CMM CO.,LTD have decided to enlarge the Bangladesh market for automatic bricks […]

pile driving machine

Pile driving machine 

pile foundation is a type of deep foundation . it wiil be uesd on that place where the bearing capcity of soil is low then pile used for transfer the load of structure on the hard rock . different types of piles are used according to the load and bearing capcity odf soil for this purpose use the pile drive machine 

.A pile driver, buildings or other structures to provide support for the foundation piles into the soil (poles) used to drive a mechanical device. The term of the pile driving rigs are working with members of the construction crew that is used.
This freely slide up and down a line that is capable of a traditional type of pile driver placed between the guides includes a heavy weight. It is placed on the heap. Weight hydraulics, steam, diesel, or which may involve the use of manual labor, is raised. Weight is released then reaches its highest point and to drive piles into the ground when it shattered.

Types

Bearing pile
Friction pile 
Bearing com friction pile 
Sheet pile 

At the end of the pile, the pile driving equipment to drop weight, usually by means of pulleys, manual or animal labor used to lift heavy weights. Piledriving equipment and guidance for innovative ways to increase the weight piles uses.Diesel hammerBerminghammer B6505 diesel impact hammer 30 in the pile driving pipe.
A modern diesel pile hammer is a very large two-stroke diesel engines. Weight piston and cylinder apparatus which is connected to the pile. The cylinder is in the air - it's usually a cable from the crane holding pile driver - Piledriving raised by auxiliary means is started by placing weight. Diesel fuel injected into the cylinder / added. Using a quick release weight, dropped. Hot on the weight of the piston ignition of diesel fuel, the air / fuel mixture to compresses. Pile on the transfer of energy mix falling weights, and weight of the drive backup are ignites. Fresh air helps in increasing weight, and fuel or closed out by the staff until the cycle starts over.
From a military manual pile driving hammers: Initial start-up of the hammer piston (RAM) travel automatically allowed to fall by gravity, to a point where the piston release is required to be taken. Piston comes, it blocks the effects of a metered amount of fuel in the pan ball discharging the fuel pump, dynamic. Fuel trapped in the cylinder piston blocks the exhaust ports falling, and the pressure begins. Compressed air drive and pile cap firmly against the effects of a pre-load force exerts a holding block. At the bottom of the compression stroke, the piston downward movement of fuel atomizing and piled on the starting block strikes impact. Piston immediately after the attacks, the atomized fuel ignites, and the resulting blast driving it further into the ground, moving already exerts a force on the heap even more. Rebounding from the resistance of the pile reaction explosion drives the piston upward. As the piston rises, the exhaust ports open, releasing into the atmosphere gases and explosive power. The upward movement of the piston stops, start the cycle again by gravity falls.

concrete compaction machine (vibrator)

concrete compaction machine (vibrator)

 This is most important machine in construction works . and use for compaction the concrete raft foundation pile foundation etc we can control the voids ration by using this machine after used this machine the voids of fiil in concrete due to vibrate this machine in different types of vibrator are use in construction works .

Vibrating screens in a mixture of different sized particles are used for bulk materials separately. With sand, gravel, and crushed stone, river stone and other aggregates often using vibrating screens are separated by size.
Vibrating compactors especially roads, railways, buildings and grounds used for soil compaction.
Trapped air and excess water are released so that the fresh concrete poured concrete vibrators and concrete formwork in strengthening settles firmly in place. Improper consolidation of concrete, concrete strength compromise cause product defects, such as bug holes and honeycombing can produce surface blemishes. Concrete Vibrator an internal one end connected to a hose or power cord with the handle of a baseball bat-shaped, about a steel cylinder. vibrator head is immersed in wet concrete.
Solid form of external concrete vibrators, via a bracket or clamp system, connected. There are a wide variety of external concrete vibrators, and some brands of vibrator manufacturers of solid forms designed to fit bracket or clamp system. External concrete vibrators hydraulic, pneumatic or electrical power are available.
Sometimes determine Hill tables or tables to shake or vibrate to demonstrate the ability to withstand the test product is used. This kind of testing the automotive, aerospace, and defense industries are. The company has three different types of machines sweep sine, random vibration, and are able to generate synthesized shock. In all these applications, usually vibration part under test component for input to measure the response of one or more will be instrumented with accelerometers. Profile usually a sine sweep vibration (measured in hertz per minute per second or hertz) at a set rate increases in the frequency and low frequency Hill starts. GS as measured vibration amplitude may increase or decrease as well. Will be at the resonant frequency of a sine sweep. Profile of a random vibration spectrum at different times with different frequencies will excite. The calculation of the frequency bands within an acceptable tolerance to make sure it goes into heat. A random vibration test suite for several hours can take anywhere from 30 seconds. This, for example, a car driving on rough terrain or a rocket taking off, the intended effect is to synthesize. A synthesized a range of shock pulse frequency sine waves half the amount covering many regarded as a short-term high levels of vibration. This effect is intended to simulate the impact or explosion. A shock pulse test usually lasts less than a second. Vibrating tables, shake it or a container that can hold more products to solve material handling industries in the packaging process can be used.

plastering machine

platering machine

Plasterwork building operations, primitive man in a simple manner with the houses built of sticks plastered with mud and was showing early evidence that the employee is one of the oldest crafts. Soon found a more durable and sightly material and dust or dirt employee to take place, and was approached in a very remote period plastering materials Compounding this is some amazing early plastering This fact was made clear in the present day we use it in its scientific structure that excels The undisturbed.

Perhaps the very first pyramids in Egypt, at least four thousand years ago contains plasterwork executed, and yet this time, tough and durable, current. Recent discoveries of this time plasterer's principal tools designed with those used today, virtually identical in format and purpose that has been finalized. His best work our way Egyptians lath, plaster, and set to float in a fair imitation of the time like plaster of Paris, calcined gypsum made from plaster, and plastering on reeds used these methods. Was introduced to strengthen the hair stuff, and under the somewhat over an inch thick.

A fine white lime plaster stucco very early use of the search in the history of Greek architecture, such has been found in Mycenae. Art more than five centuries before Christ in Greece had reached perfection, marble and plaster building was often even in some cases where the outer and inner temples was used to cover. The beauty of Greek history in this period had reached a very high degree the decorative painting, formed a magnificent land.

Equipment and materials
Plastering most common operations, relatively few tools and some materials are needed, but in all branches of skilled labor efficient devices will inherit a huge variety. Workers materials, etc. to create washes of color with different ingredients together laths, lath nails, lime, sand, hair, plaster of Paris, and a variety of cement, are.

Laths 

With brown coat oozing through the lath is seen from behind
A wooden floor or split wood laths are set according to the distance range from two to four or five feet in straight grained wood, usually narrow strips of fir Baltic or American, are. Laths are about an inch wide Lathing, and are made in three thicknesses, lath and a half (1/4 inch thick), and double (3/16 to 1/8 inch thick) single (3 / 8-1 / 2-inch thick). Thick laths latter, in which case the laths must be thick, rough, except where it would be subjected to, such as vertical partitions additional stress at work, and to stand Slim, Germany I should be used. Laths between them to form a plaster key usually about 3/8 of an inch are nailed with a space. Laths were formerly made all by hand. A large amount, however, are made by machinery and San laths, made by hand, those known as rent or riven laths known. (From riven) laths with the grain of the wood as a dividing line, giving the best results, and stronger and make the machine turn so as not responsible laths, fibers, some of which usually In the process of sawing rent cut. Wood Care should be taken to check the pH value, which attacks oak lime contains tannic acid, it can compromise bond strength.

With ends butted against each other three or four feet wide sector so as to break the joint Laths must be nailed. Breaking joints in such lathing, plaster for couples to break below trend line and a key is obtained and the wood frame provides for restraint. Each lath should be nailed at each end and a cross joist or stud wherever. Three inches wide (76 mm) or a fillet on top of the wood laths are then nailed to the center with double lath is nailed, that is, the counter should be lathed. This plaster a good key is to preserve. Sometimes battened responsive to wet and damp walls and plastering walls to form an air cavity are lathed.

Either in the form of wire or perforated sheets of metal, Lathing, fire and it is now widely used due to long-lasting quality. Best England Jhilmil, Bostwick, Lathing known to be different under various patents in the design of this metal, expanded metal lathing and very very kind. Two last names is also widely used in the United States. Lathing usually iron nails, cut, wrought or cast, and the better class of work they are galvanized to prevent rusting. Zinc nails sometimes used, but are expensive.

Lime 

Principally for internal use lime plaster that chalk, oyster shells or nearly pure limestone is calcined, and fat, pure, known as chalk or lime rich. Hydraulic lime mainly for outdoor work, plasterer used by. In case of a partially slaked used before being calcined perfect Slaking of lime is very important, as it will "blow" to the work position and the blister. The limestone building as soon as it starts running as it should be, and at least three weeks, lime and its use should be run through the middle of surgery. Due to time constraints Hydrated lime plaster mixed with generally used for modern construction.The housing industry is not required, plastering, a low-quality cost-effective to get finished.

Hair 

Hair through binding as used in plaster, and provides rigidity to the material. Before the development of the motor car was available as easily as traditional horsehair most commonly used binder was. As fiberglass strands in resin, to control and when it dries it is subject to flexing or any small cracks within the mortar used by the most similar functions in the hair.

Bell sold three properties which are usually specific types of hair, now, but the horse hair, which is sometimes substituted or mixed with lower characteristics of the ox hair. Good hair (short and long lengths in UK cattle and horse hair is used) should be long, and it protects against degradation because some left greasey (lanolin oil) very high alkaline plaster  presented at when. Before use it well to separate lumps, beaten, or must be touched. It is not so strong as an ox hair in the US, often goat hair, is used. Used in good quantity (up to 12 kg per metric cubic UK) two or three cubic feet of coarse hair to stuff a pound. Lime plaster reinforcement is common in the hair, and hair historic plaster and other types of organic fibers can be found. However, the external organic material moist lime leaves, especially, will degrade in moist environments. This problem gives rise to new lime is used in the POLYPROLENE fibers . In 2012, the UK Building Research Forum lime lime plaster looked at the potential for hair loss.

Manila hemp fiber hair has been used as an alternative. Manila hemp fiber slabs made with hair plastered to 195 pounds (88 kg), plaster, 150 pounds (68 kg), 145 lbs (66 kg), and 144 pounds of goat hair mixed with jute in the sisal hemp (65 broke kg). [Citation needed] Another test was made in the following manner. Two barrels of lime and sand mortar, containing a quantity of normal goat hair, and other Manila fiber was made up of equal proportions. After nine months, the barrels were opened in a dry basement. This hair is almost completely eaten away by the action of lime and mortar broke in and found many that were easily crumbled. Manila hemp mortar containing, on the other hand, showed great harmony, and undamaged except for some effort to pull hemp fiber. [Citation needed]

Methods 

Plasterer work of fine sand, for now, citing the sand, such a light color and fine texture is used when necessary or fine silver sand, foundry sand, as used. Medical centers in two parts, one part barium is added to cement and sand walls where X-rays are needed to block five. Or coating the concrete with a trowel if thrown or sprayed in liquid form on the surface of the sand to one part cement a "splash" when coat surfaces. It provides the key to render a better sucking the water from unsafe not only prevents concrete. Portland cement for exterior work on the resistance of the external characteristics of strength, durability, and the season is undoubtedly the best material. Cracking plaster coats need to be particularly strong and resistant, such as walls of a squash court, Sizing surface to increase the bond strength and flexibility of the application is first mixed with plaster.

1/2 to 3/4 inch thick first coat of render, and a part of the sand in the sand to one part cement ratio of the two, depending on the surface to be covered, is mixed. Shovel often mix ½ lime is added to make more pliable. The dampening of the surface to be coated, "screeds" render the two horizontal bands at head height and floor level around another one, are applied, the horizontal / vertical alignment of the finished signs for, then partly allowed to dry. Guides additional render finish and leave a rough flat surface as well as a process for laying concrete wall, a slightly higher level than screeds, and a "straight edge" (smooth) to use is provided for, Plasterer screeds uses. Or for a lower price over a rough surface can be dispensed with if certain screeds. Then fill large imperfections to remove or render a float (with a smooth flat wooden tool handles) is over with. The key is a strong need for some applications where the base with nails protruding from the use of a float is made from. Render the base with a sponge attached to a float on the wall is used to prepare the surface until the surface is free of defects.

Quality of work, or in the wall out of plumb is a large variation requires a thin "scratch" First, as described above render coat over a second coat is applied, the thickness render.

About 3/16 inch thick, or completion of the setting plaster coat should be wetted well before the end of the work is done with a hand trowel.worked for a time. The finishing plaster was usually two or three passes to get on is trowelled

Shovel machine

SHOVEL MACHINE 

Shovel machine are used in construction works roads and buildings mostly this machine are using in road construction for laveling and peeling the road place . diffrente  types of his machine are used in the works 

Design 

Usually such a handle shovels ("dipper" or "dipper stick") which supports with a crane ("boom") as a mechanism, usually a counterweight, and a front attachment, driving and control, a power plant with a rotating deck consist of a digger at the end ("bucket"). "Dipper" is also sometimes used to refer to the combined handle and is Digger. Machinery with tracks or wheels mounted on a base platform. [Modern bucket capacities ranging from 8 M3 by nearly 80 M3.

Use 

Shovel digging overburden.
Minerals such as coal, although power may include loading shovels, digging in open-cut mining operations and is used principally for the removal of overburden. They are the modern equivalent of steam shovels, and work in a similar fashion.Operation
Shovel operates using several main motions:

Hoist - (edge ​​of the material being dug) stretching through bank bucket
Sheep - dipper handle out or move to control the depth of cut and when positioning to dump
Swing - rotating shovel between digging and dumping
Propel - different places or positions shovel dig moving unit
Bicycle shovel digging cycle, or, comprises four steps:

Excavation
Swinging
Dumping
Return
Phase digging dipper from the bank approach, hoisting the dipper to fill, bank Dipper consists Rush. Dipper clear both vertical and horizontal bank swinging phase occurs once. The operator controls the dipper through a planned swing path and an appropriate distance unit (eg truck) is positioned over the long throw height. Dumping height while maintaining the dump load is required to open the door to dump dipper. Returning is when the dipper swings back to the bank, and to close the dipper door

Asphalt paver

History

Asphalt paver handling system that has developed original material, Barber Green was developed by the company.Machine developed. Were separated and the desired process and modern paver was on his way to set it up as not as effective. Was invented in 1933 the float to smooth and uniform material density and thickness of the bar when combined with tamper. Harry Barber patents a "machine for laying roads process" on 10 April 1936 and then filed for has been included in the most Pavers Barber Green Company by 6 December 1938. The main features of paver received a patent US Patent 2,138,828, improvements have been made to control the machine, though.

Operations

Asphalt paver hopper of a dump truck or a material transfer unit is included. Asphalt from the hopper to the auger conveyor carries. in front of the auger to smooth material gives a reservoir. Takes stock of road surfacing materials and more it spreads and initial compaction width offers
behind the paver screed should provide a smooth uniform surface. To provide a smooth surface is used a free floating screed. This last effect reduces the base topology which is towed at the end of a long arm. To smooth attack, angle and vibration of weight to smooth, tone and content of the towing force: to pave a number of factors including elevation is controlled by.
The information gathered usually a grade sensor which controls the angle of attack to pave the pavers using automatic control to smooth the road for the development of the final grade changes, according to. Additional control over the slope of the floor, are used to correct a crown or superelevation.
A constant reservoir of material in front of the screed paver should proceed at a constant speed and to achieve a smoother surface. More asphalt paving will cause an increase in physical stores or asphalt paver speed increases because a thicker mat and an uneven surface being placed last. Alternatively drop in speed or a reduction in material to be thin, smooth and mat will cause a fall.
And the need for a steady supply of materials in combination with paver to use a material transfer unit is one of the reasons. A material transfer unit level to provide a happy ending, without contact paver allows for continuous material feed. Paver's hopper to fill a dump truck is used, the speed change or make contact with the paver and screed height can cause it to suffer.

Concrete paving

Often on major highways are paved with concrete and it is using a slipform paver. Trucks piled up along the front of the machine and then throw in loads of readymix concrete slipform paver concrete spreads out to a smooth and level off using.

Road roller

 Road Roller used in construction work

 Road roller are used in construction work road and buildings. mostly used in road for compaction
in road construction first of all level the road where we laying the road after leveling doing the compaction on the road land in dry condition . after this some percentage of water are shrinkage on the road place then again compaction that are called wet compaction . after compleating this step laying the aggregate according to the specification some voids are empty and hollow for filling this hols using the sand in thickness of 1.5 inches . then again compaction on this place in dry condition and same as it after this wet condition rolling on the road surface now this road are called WBM (water bound macadem road ) after this step road open for traffic till to more compaction due to the weight of  vehical . in different types of roller are used in these work but mostly used the  foot ship roller because its weight of very high a good work depended on the good machine basically we used this for compaction .

Level road rollers being implemented (static) or compress (Hull) to use the mechanical advantage of the weight of the vehicle. A road project initial compaction of the substrate on the pad having a surface area less than a padfoot drum roller compaction density is achieved, is using. On major highways such as a caterpillar 815/825 series padfoot drum machine and a blade, with a four-wheel compactor, bulk material to spread its high weight, speed and a powerful force used to advance will be. A single regional roads can be used padfoot drum machine. The machine is generally smooth land until a smooth drum compactor that compacts down the high spots, and it is usually to get a level surface in combination with a motor grader is. Sometimes it will be used to stage a pneumatic tire roller. The two rows of rollers that overlap pneumatic tires (front and rear) feature, the flexibility of the cell and the wheels and tires with a vertical movement, uneven ground that enables us to work effectively provides a roller kneading action is. Once the base is flat soil compactor drum pad on the surface of the road is no longer used. The next course (road base) for maximum compaction with the right amount of moisture required to achieve a smooth flat surface of a drum, roller or smooth mill grader in combination with a pneumatic tire roller, and a water Using the truck will be strengthened. After being compacted road base, a smooth drum compactor on the road surface is no longer used (a special drum machine on flat tires are wide basis, however, is an exception). Asphalt concrete (asphalt or blacktop aka England in North America, or macadam) laid the final wearing course using a paver and a tandem smooth drum roller, a three-point or roller compacted using a pneumatic tire roller is . Three points on the asphalt rollers were once very common and is still used, but Mill Hill rollers kneading action of pneumatic tire roller surface to seal off the last roller with the usual choice now, do.
Also used in the compaction rollers. Such padfoot compactors general or "sheep's foot" drums, and do not get a smooth surface. Due to the small area of ​​the pad contacting the ground, in compression.

The effectiveness of a roller depends to a large extent on the weight, since the mid-19th century, self-propelled vehicles replaced horse-drawn rollers. The first such vehicles were steam rollers. A cylinder steam rollers usually used for the base and a vibrating roller compaction on similar lists in more bounce and vibration from the crankshaft through promoting a lower gear with high engine revs run was.was. High-geared models often hot asphalt laying machines and chipping which followed behind in the chip Chasers "was cited as the basis of smaller engines to slow as steam rollers were often gears by Young were dedicated to the task. Some companies in the US road used steamrollers through the 1950s, and in the UK, some in commercial service until the early 1970s.
20th century technology of the internal combustion engine, kerosene-, gasoline- (petrol) and diesel-powered rollers gradually improved during replaced their steam-powered counterparts. First, it changes the internal combustion steam powered road rollers rollers were very similar. The wheels, usually large, exposed spur gears transmit power from the engine, similar to the method used. Age engines, especially kerosene-powered ones were usually difficult to manage as some customers did not like them in their childhood.

Road cutting machine

Road cutting Machine

Pavement milling (Cold Planing, milling asphalt, or profiling) such a road, bridge, or a paved parking lot area is the process of removing at least part of the surface. Milling, surface and a depth to the surface for removal only removes sufficient thickness anywhere. Instead of milling a paved area is only for repaving the current level over a number of different reasons.

Recycling of road surface milling a road surface is one of the main reasons. Milling extensive floor to be used in the overall removed and the ground floor where recycling Today, it is used for.  for the milling of asphalt products which can be recycled asphalt pavement (RAP), is reclaimed aggregate and asphalt surfaces New cement (binder) or a recycling agent mixed with hot asphalt Mix Asphalt (pavement).  This resurfacing reduces impact on the environment is.

Milling a better driving experience and / or to extend the life of the road, away from the surface tension can be. Milling can eliminate some of the problems include:

Raveling: binder on the road and becoming loose from
Bleeding: the binder to the road surface (asphalt)
Rutting: low spots in the floor of the establishment as well as the direction of travel of the wheel
The shoving: a washboard effect transverse to the direction of travel
Ride quality: such as flowers, bumps's, sags, or recession, uneven road surfaces
Damage accidents and / or fire resulting in
It also controls all or part of the road can be used to change the height. The heights and other road structures such as the approval can be done to control: Stop, manhole and catch basin heights, shoulder and fence heights, and passed overhead shows  It also shields or to Camber can be changed or road, which can help with drainage for grade adjustment.


Special milling is often used along the highways in the Rumble strips can be used to form.  Instead, other methods such as rolling them, using milling, road surface hardening in the Rumble strips can be added at any time means.

DOWEL another example of the process of transition period in order to produce solid slap ROTO- milling head is to modify. Saw and jackhammer to cut the slots for the dowels is. DOWEL after placement, slot then usually with a non-shrinking concrete mix backfilled, and the floor is smooth recovery of diamonds are field. This special milling process is working during the traditional method is less time to create. 

Curber machine

Curber Machine 

In the construction work we are used the curber machine for concrete poring . in different members . mostly this machine are use for rcc barrier poring in the bridge constructions

sica folding for barrier very though  so there used the curber machine the slump of concrete we are uesde with curber is very siimple . ago using the concrete we are held some test on the concrete 

in these test mostly we uesd the slump con test we can find the slump of concrete with this test . its define by slump con 

in different shape of slump con used but stander size of slump 20cm diameter of the base of slump and 10 centimeter diameter of the top of slump con the heigt of slump con is 30 centimeter . the rod used for slump con for checking tyhe slump of concrete 

Biggest excavator in the world

Biggest excavator 

In the construction work mostly excavator are used for cutting and filling in the road construction and building construction in hill areas . different types of excavator are used in this work according to trhe nature of work.

When its construction was completed in 1978, the Bagger 288, the world's largest land the Space Shuttle and Apollo Saturn V vehicle as the launch vehicle (Marion Power Shovel Company of the excavation by the manufacturer built) take Used to go superseded NASA's Crawler-Transporter, for bucket wheel excavators are powered by an external power source 13,500 tons since. [1] NASA's Crawler-Transporter, still lives in the world is self-propelled land vehicle.

The Bagger 288 Hambach stripmine coal mining in Germany before the work was made for removing the overburden. A football field (Soccer) equal to 30 meters deep (98 feet) digging - it 240,000 tons of coal or [2] daily 240,000 cubic meters of overburden can dig. Coal produced in one day fills 2400 coal wagon. Digging high long 220 meters (721 feet) and approximately 96 meters (315 feet) across. The operation of Bagger 16.56 megawatts of externally supplied power is required. [3] This per minute (0.1 to 0.6 km / H) 2 to 10 m (6.6 to 32.8 feet) can travel. The main part of the chassis wide 46 meters (151 feet) and 3.8 meters wide each (12 feet), 4 Caterpillar track assembly sits on 3 rows. Bagger 288 large area of ​​the tracks that very little ground pressure (1.71 bar or 24.8 psi) means, it's a remarkable track excavator without leaving gravel, earth and even allowing them to travel on the grass . This is a minimum turning radius of approximately 100 meters, and the maximum gradient of 1:18 can climb.

Excavating head itself in diameter, 21.6 meters (70.9 feet) and 6.6 cubic meters of overburden (8.6 yd³) holding 18 buckets.

By February 2001, works entirely through Tagebau Hambach mine coal was exposed and there was not. Three weeks from the Autobahn 61, the river Erft, a railroad, and travel across several streets, Tagebau Garzweiler a 22 km (14 miles) made the trip. The move will cost about 15 million German marks and a team of seven workers. By the rivers of water to flow to large steel pipe with stones and gravel by providing a smoother surface than they were crossing. Special grass valuable area was seeded to smooth its passage. Bagger 288 excavator to remove in one piece and the piece of disassembling it was more economical to move the pieces.