FRAME AS-TRACK ROLLER 1543330 - Caterpillar

density of the material in the strike-off zone varies as the forward speed of the machine changes. The vibration that is delivered to an area depends on the speed of screed strike-off. The vibration that is delivered to an area depends on the speed as the screed passes over the mix. When the paver slows down there is more compaction and the screed rises. When the paver speeds up there is less compaction and the screed lowers. The paver must operate at different speeds in order to meet the different paving rates, the different paving widths, and the different pavement thicknesses. Uncontrolled speed variations must be avoided in order to obtain optimum performance of the floating screed. The correct speed of the paver will be determined by the rate of supply of material to the paver. For optimum results, the paver should not stop moving.Once the correct speed has been selected, the angle of attack for the screed will need to be adjusted in order to obtain the correct mat thickness. If the speed of the paver changes the angle of attack for the screed will need to be adjusted in order to maintain the correct mat thickness. If the speed of the paver increases, the setting for the angle of attack will need to be increased. This will allow more material to pass under the strike-off zone in order to maintain the same mat thickness. If the speed of the paver decreases, the setting for the angle of attack will need to be decreased. This will restrict the amount of material under the strike-off zone in order to maintain the same mat thickness.