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Improper use of influence paver Pavement

Industry News2015-05-15

(1) be adjusted paver rammer traveling speed and frequency. Traveling speed paver should be based on the tonnage of the material per unit of time, a single dump truck back and forth around the field of time, dump truck tonnage quantities, paving thickness and width, and other factors to be adjusted. Must not expected for a long time with the fast, slow feed came; when adjusting speed, frequency rammer must be followed to make adjustments, driving fast, the need to increase the frequency of rammer, whereas smaller. If you only adjust the travel speed without adjustment rammer frequency, before and after adjustment will cause compaction of inconsistency, although it seems very smooth, but not smooth after the compaction. Because it is man-made adjustment, it is not possible to adjust the degree of compaction adjusted consistent before and after. And when traveling faster transfer speed, the material is more prone to segregation, while paving thickness (elevation) there will be changes, so driving speed generally 3 m / min or so as well.


(2) hasty adjustment paving thickness (elevation) is. Because it is set at a paving thickness, in fact screed not immediately reach the height we require, but slow rise, it shall be measured again after the machine through at least three arm lengths to correct to reflect the actual situation, and therefore should not go just finished adjustment measurements. In construction, the thickness difference how much it slowly adjusted, the adjustment has to display the handle. Then the measure until after the machine with a certain distance. In road construction, since the grass-roots level it can not be absolute, so paving thickness measurements must be some differences, this can not be a man in order to be adjusted.


(3) optionally shutdown. Dump no command or improper command, or because of the Traveling too fast caused by blanking and other reasons, are likely to make the paver forced to shut down. When ironing board will then stop again paving the road, leaving a mark, even with anti-climbing lock will still have traces of existence, just screed not climb it. It marks a significant degree temperature and the material, the length of downtime related to low temperature materials, as long as obvious signs of downtime, the flatness of the road. So in the normal paving process, should be done as far as possible without stopping the machine.


(4) of the crawler (tire) slip. Tipper OVERBRAKING grassroots emulsified asphalt spray too much, excessive accumulation of material before the screed, track shoe wear and serious, will cause slippery track paver. When the track slippery, traveling speed of the machine has slowed or even zero, and the rammer frequency does not change, resulting in compaction of the machine before slipping inconsistent, the flatness of the road. So there must be someone Dump command grassroots spraying emulsified asphalt can not be too much. Paver, the most important thing is not the material before the screed excessive accumulation of general material stacked to a height of 2/3 of the spiral blade is just right, and the spiral should be uniform rotation. The size of the fixed height of the spiral of material accumulation amount of material related to the door, spiral fixed height should be adjusted according to the paving thickness. In ABG machines, for example, paving thickness at 0 ~ 8 cm, helical axis height from the ground shall be 315 mm (minimum); paving thickness at 4 ~ 15 cm, the helical axis height from the ground should to 365 mm (intermediate); paving thickness at 15 cm above the helical axis height from the ground shall be 415 mm (maximum). Track shoe rubber block badly worn, not only will cause slippery track, but also can cause uneven contact with the ground, although with paver leveling device, but also affect the smoothness of the road.


(5) pre-elevation not adjusted. Grassroots uneven paving, pavement thickness difference is large, we often encounter such a situation: the leveling cylinder has been adjusted to the extreme, but the thickness (height) is still below standard, the flatness of the road. At this point, you should check paver preselected elevation is appropriate. Preselected elevation adjustment should be based paving thickness, thickness at 0 ~ 4 cm elevation angle of less than zero; the thickness of the elevation at 4 ~ 15 cm when should be zero; thickness at 15 cm above the elevation should be greater than zero. When paving asphalt, the machine in the normal process of moving its ruler scale leveling cylinder maintained at 10 to 15 is better. Some brands of paver and no direct visual scale, which can extend the amount of leveling cylinders as a reference.


(6) leveling instrument sensitivity undesirable. Leveling instrument sensitivity is too high, the leveling cylinders occurs easily ran up and down; sensitivity is too low, it is easy to make the leveling cylinders unresponsive, directly affect the road surface flatness. General leveling instrument located around 5 to an appropriate scale.


(7) The screed is not in a floating position. When paving job, the screed should float on the paving materials, paving adjusted by adjusting the thickness of the elevation, if not in the float position screed, paving thickness that can not be adjusted.