Concrete Pavers For Pavement Construction and Canal Lining

Concrete pavers are designed to meet demands for a number of paving applications. They can be used for slipform paving streets, bridge work, parking lots, airport runways, curbs and gutters, irrigation ditches and golf cart paths to name a few. Whatever the application or type of paver used, these machines have the capabilities to pave projects with speed and precision while maintaining a focus on performance and quality.

There are two basic methods of building concrete pavement: fixed-form paving and slipform paving. Fixed-form paving requires the use of wooden or metal side forms that are set up along the perimeter of the pavement before paving. Slipform paving does not require any steel or wooden forms. A slipform paving machine extrudes the concrete much like a caulking gun extrudes a bead of caulk for sealing windows. In general, slipform paving is preferred by contractors for large paving areas where it can provide better productivity with less labour than fixed-form paving.

There are a variety of different fixed-form paving machines. The least complex are vibratory screeds, and revolving tubes. These hand-operated machines finish the surface of the pavement between fixed forms. Larger, form-riding (or bridge deck) machines are self-propelled and also place and consolidate concrete between fixed forms. These machines either ride on the forms or pipes laid outside the forms, or on curb and gutter.

Slip-form paving is the most widely used paving method in modern concrete paving construction. The slip-form paver consolidates screeds and initially finishes the concrete in one continuous operation without the need of forms. Modern slip-form paving equipment is of the extrusion-type process. The extrusion process can be simply defined as forcing, pressing, or pushing a material through a die or mold to create the desired shape. Slip-form paving is very efficient and can provide smooth concrete pavement. Because there are no forms, the plastic concrete must be able to hold the pavement edge. Some machines are also equipped with automatic finishing equipment and equipment to automatically insert dowel bars into the pavement at transverse joints. These devices are called Dowel Bar Inserters or DBI’s.

While paving, slipform paving machines are equipped with sensors to follow stringlines that are put into position along either side of the paving area. The stringlines control the paver direction and surface elevation. All slipform machines also are equipped with vibrators to help consolidate the concrete and ease the progress of paving by making the concrete more fluid. The vibrators are located toward the front of the machine ahead of its profile pan. The profile pan is the part of the paver that actually extrudes the concrete creating the final shape of the slab.

Concrete pavers for canal beds and canal slope are generally custom built as per the need since no two canals are alike. Specially designed pavers are employed for placing and finishing of concrete on canal beds and slopes. Canal pavers helps contractors in achieving greater efficiency by reducing labour requirements, increasing product rates and improving concrete uniformity.