Research on Road Performance of Asphalt Stabilized Macadam Base Based on Vibration-formed Technology
In order to study the influence of vibration forming on road performance of asphalt stabilized macadam base(ATB),the course aggregate void filling(CAVF)is used to design the gradation of ATB,the influence of interference coefficient and loose packing clearance ratio on the performance of ATB are compared,and the gradation of ATB is optimized and the optimal asphalt volume is determined.Then the low temperature bending test of small beam test,uniaxial compression tests,penetration repeated loading test and water stability test are designed to evaluate the low temperature performance,strength,high temperature performance and water stability performance of ATB,and compared with the same gradation and asphalt content ATB fabricated by compaction molding method.Finally,the influence of the change of gradation maximum particle size on the performance of vibration-formed ATB is analyzed.The results show that ATB designed by CAVF method is dense and has good performance.ATB formed by vibration method has good road performance and overall performance is better than ATB formed by compaction method.When designing the gradation of ATB,in order to ensure good road performance,the maximum particle size should not exceed 31.5 mm.
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