Slip Form Paver – Types & Benefits of SlipForm Paving Technology

Slip Form Paver – Unique Technology Machines

The slipform paving is a concrete molding process where concrete is dispensed into a continuously moving mold to attain the required shape or design. This technology is applied in heavy constructions such as roads, bridges and heavy buildings. The main advantage of this technology is the creation of a continuous, “cast in Place” and almost flawless structure that has superior performance over other methods such as molds and discrete blocks.

Slip Form PaverOther Benefits of Slipform Paving

  • They are fast, reliable and produce a much better looking surface that is equally strong.
  • Precise construction is achieved,
  • Reduction in the cost of construction due to high mechanization

Types of slip form pavers Available

Various types of slip form pavers are available in the market depending on the output specifications of each model. Manufacturers of these equipments also classify their machines based on the individual features unique to the equipment. Some of the different functions of these equipments may include;

  • Pavers able to perform convectional paving, offset paving, and custom applications
  • Able to perform automatic width adjustments withoutunnecessary adjustments
  • Half width pavers designed for construction of busy streets and smaller roads with limited supply of concrete, these are also used where larger machines cannot be used.
  • Heavy duty pavers used to recarpet massive projects such as highways, airports, and other heavy jobs. These are sturdily built to create pavements of up to 50cm thick.
  • The slip form pavers may also be specially designed to manufacture continuous kerbs that are strong and appealing.

Technology Involved In Manufacturing Slip Form Pavers

The slip form paving technology is based on the rapid setting properties of concrete material. The technology works on a balance between the quick settings of the concrete and remains workable enough to be molded into the form. This balance is crucial to ensure the final structure is strong and durable.

How the Slip Form Paver Works

The concrete used in this system of paving is very similar to that used in convectional paving systems. It must have a good and uniform consistency having a slump of approximately two inches. This concrete is deposited into the hopper box from where the machine evenly distributes the material across the paving surface. The paver machine helps in achievement of a homogenousmix and compaction through a system of hydraulic or electric vibrators, while the mold helps in forming the slab to the desired thickness and width.

Demandof Slip Form Pavers

The global demand for slip form paving technology continues to increase as more and more pavement roads are required. The market for concrete paving machines is seen to be growing at a rate of 15-20% every year and industry analysts fore see a more rapid growth by the end of year 2017.This is boosted by increasing road networks in various countries ,time bound projects requiring very high efficiency and expansion projects of airports,and residential areas. In India, the government’s plan to construct over 20 kilometers per day of road has created a sufficient demand-pull for these equipments. Some of the global leaders in slipform paver manufacturing includes Apollo Inffratech.

What are the Advantages of Doing Slipform Paving

The slip form paving technology is one of the advanced forms of technology that is used for the purpose of paving construction works. The construction materials (PCC) are continuously prepared and poured over the paving surface and the leveling is done simultaneously. The pulling is done constantly to help in the consolidation process. The Slipform Pavers are the machines that are used for this type of topping. There are several advantages achieved by availing this form of paving. Take a look at the major benefits of selecting this type of surfacing.

Best Precision is available: When this machinery is used, the precision levels of the surfacing are very high. The conventional forms of topping cannot be error-free. There may be defects such as undulations. The defects can be minimized the most if this form of surfacing technology is adopted. The Slipform Pavers are used for the surfacing of the best quality roads.

SlipForm Paver in India

Low Slump PCC is used: This type of technology always makes use of low slump PCC. This means that the water content in the PCC mixture is the minimum. The concrete settles down faster than the traditional form of surfacing. The strength of these paving is found to be more. The roads which need to be built very fast always use this technology.

Reduction in Labor Costs: The entire operations are mechanized. The use of manual labor is nearly done away with. This eliminates the high labor costs that are involved in the traditional form of paving. The job is entirely carried out by the machines. Only a single machine can carry out the jobs of many labors at a time. Chances of chaos due to excessive labor are also curtailed.

Slipform Pavers are used for best quality roads

Best for Large area of Paving: Many a time, a large stretch of area needs to be paved or metaled. These machines are the most suitable to use during this period. The conventional method of topping would take longer for the job. There is also an uniformity in the paving process. This is possible only because the entire operation is mechanized. Manual jobs are not involved.

It is a Faster Process: The entire process can be done faster than the traditional surfacing. When roads and pavements are to be constructed, this technology helps in opening up these places for public use at the earliest. You cannot afford to keep these places unusable for long. Otherwise, a huge amount of inconvenience is caused to the common people. The consolidation of the laid materials also takes place faster. If a double layering needs to be done, this is the best option that should be exercised.

It Creates Better Looks: If you want the topping to look good free from defects, this is the method that you must adopt. No other type of surfacing can give a neater appearance. The major roads should always be paved in this manner.

These are the main advantages of implementing this type of surfacing. It may be expensive but is always the best form of paving.

Advanced High Quality Slip Form Paver for High Production Works

Slip Form Paving

Slip form technology is one of the revolutionary cutting edge technologies in building and construction industry. The slip form paver greatly improves the quality of pavements and reduces labor costs.

Essential Features of Slip Form Paving Machinery

The machine utilizes low slump concrete that has limited flow and therefore tends to remain at the same place without the need for erected concrete formwork. Therefore, the placement, consolidation and surface finish are easily done.

The machine works using the extrusion process. The extruders squeeze concrete in the mold that has the predetermined shape.

The squeezing action forms and consolidates the concrete. The slip form paver provides vertical and horizontal force. The weight of the machine pressers the concrete against the mold sides from the top. The horizontal forces are created by the tapered side forms. In addition the continuous movement of the machine presses the confined concrete. The vibration process fluidizes the materials enabling them to spread and consolidate.

Slip Form Paving The most critical elements of this machine are; the auger or a paddle which uniformly distributes the concrete, the hydraulic powered tamper bar for consolidation and the profile pan which is the finish tool. In addition, the internal vibration created by a set of hydraulic vibrators is critical since it fluidizes the concrete allowing it to spread evenly, removes internal voids and allows slipping which is critical in slip form equipment.

The paving width is of critical importance as it determines the span of the road or pavement. The width is defined as distance between 2 crawler tracks. Typical machine widths range from 2, 5, 8 meters while larger ones can go up to 18 meters width.

Other critical features of these machines include: number of hydraulic vibrators that range from 8, 16, 24 onwards, the hydraulic circuits, high efficient diesel engine, power washing mechanism, hydraulic adjustable sides, hydraulic steering , fully operator panels with sophisticated controls among other features.

slip form equipmentApplication of Slip Form Technology in Large Paving Projects

This technology is suitable in large construction projects for bridges, roads, pavements and open water channels. Unlike other paving technologies that require erecting formwork, pouring concrete, ramming using vibrators and curing; this method only uses a machine that continuously forms the structures.

Advantage of Slip Form Technology

These machines are the most ideal for large-scale pavements such as those in airports and highways. Since these tracks are subjected to extremely heavy pressure and loads, the concrete must be made without irregularities.

Unlike prefabricated concrete, slip form can be made to any profile and hence suitable for sewage and water channels, safety barriers, raised edges at road side. Paving moulds can be made to customized shapes that produce a variety of low tolerance, smooth surface and easy to maintain concrete pavements.

Some machines have the capabilities of double layer forming as opposed to single layer which saves time.

They are economical as it uses small diesel engine to provide power which is amplified by hydraulic system. This is also environmentally friendly and the operator safety and ergonomics are guaranteed.

Demand and Forecast for Slip Form Technology

As industrialization and commercialization continue to increase, more pavement and roads are required in commercial, residential and industrial establishments. This is set to increase the demand for these heavy duty concrete machines by construction companies which in turn use them or hire them to other firms.