When the asphalt concrete pavement is pressed at the beginning of the paver, what hydrostatic pressure should be adopted 1-2 times?
According to JTG F40-2004 "highway asphalt pavement construction technical specifications implementation manual", 116th page 5.7.6 stipulates: asphalt concrete pavement initial pressure followed by paver after, usually use steel wheel roller static pressure 1-2 times. When rolling, the driving wheel of the roller should be facing the paver, and rolling from the outside to the center. In the super high road section, the roller should be driven from low to high, and the driving wheel should be rolled from low to high on the ramp.
Compacting technology of Asphalt Concrete PavementThe initial pressure shall be followed by the spreader, and the suitable smooth steel roller shall be used 1-2 times. The vibratory roller or tyre roller will be used for rolling and no serious change will occur, so that the initial pressure can be avoided and the pressure shall be directly entered;The vibratory pressure roller or tyre roller is rolled 3~5 times;The end pressure adopts the smooth double steel roller, the static pressure is 1-2 times, with the light collection surface.
For the initial pressure of common bituminous concrete pavement, a double steel roller should be used. For modified asphalt concrete (SBS) initial pressure, heavy duty roller can be used as well. Asphalt pavement compaction program: initial pressure, re pressure, final pressure.The ordinary asphalt pavement early pressure method: using light steel cylinder roller 8 ~ 10T or close vibration vibration device of roller compacted for two times, the pressure should not be less than 350N/cm, the initial pressure after inspectors, measuring working check flatness. Test work, check the flatness of crown, if necessary, be adjusted appropriately. Initial pressure in the mixture after paving high temperature, generally not less than 110-120 degrees, the rolling speed of 1.5-2.0km/h, and may not produce passage, cracking.
Steel wheel rollers shall be used for 1-2 times. JTG F40-2004 "technical specification for construction of highway asphalt pavement", thirty-seventh.
