Home>information
A Road Paver Machine is a construction equipment used to lay asphalt concrete or silicate cement concrete on roads, bridges, parking lots and other places. Its primary function is to place and lightly compact the material evenly, culminating in final compaction by a roller.
Asphalt Paver Machines were first developed for material handling by the Charles Burris Co. In 1929, the company was approached by the Chicago Testing Laboratory to use their material loaders to build asphalt roads. Although no partnership was formed, Barber Greene did develop a machine based on the concrete pavers of the time that could mix and pour concrete in a single process. However, this setup did not achieve the desired results, so these processes were separated and the modern Paver Machine was introduced.A separate floating screed was invented in 1933, which in combination with a roller provided uniform material density and thickness.Charles Burris filed a patent application for a paving machine and paving process on April 10, 1936 and, on December 6, 1938 U.S. Patent 2,138,828 was issued.The main features of the paver developed by Charles Burris Co. were incorporated into most later pavers, and improvements were made in the control of the machine.
Asphalt is added to the Paver Machine's hopper from a dump truck or material transfer unit. A conveyor then transports the asphalt from the hopper to an auger. The auger stacks the material in front of the screed. The screed piles the material evenly across the width of the roadway and provides initial compaction.
The Paver Machine should provide a smooth, even surface behind the screed. To achieve a smooth surface, a free-floating screed is used. It is dragged over the end of the long arm, reducing the base topography effect on the final surface. The height of the screed is controlled by a number of factors, including the screed's inclination, weight and vibration, as well as thePaver Machine's speed and traction.
To provide a smooth surface, the Paver Machine should be moving at a constant speed and have a consistent stack of material in front of the screed. Material stacking or increased speed of the paver will cause the screed to lift, which will lay more asphalt, resulting in a thicker layer of asphalt and ultimately an uneven surface. Conversely, less material or slower speeds cause the screed to drop and the asphalt layer to thin.
The need to maintain a constant speed and supply of material is one of the reasons for using a material transfer unit in conjunction with a Rubber Paving Machine. Material transfer units allow a constant supply of material to the paver without contact and provide a better working surface. When a dump truck is used to load the Paver Machine's hopper, it may contact or affect the paver's speed and screed height.