Effect of Molding Process on the Macro and Micro Performance of Cement-stabilized Graded Crushed Stone Mixture
Based on the 7-day unconfined compressive strength test and three-point loading fatigue test,the differences of mechanical strength and fatigue performance of static pressure forming,vibration compaction and field compaction specimens were compared and analyzed.Based on the nondestructive testing technology of industrial CT and the three-dimensional reconstruction function of digital image processing technology,the influence law of specimen forming method on the orientation angle of coarse aggregate and micro-three-dimensional void structure in cement stabilized macadam mixture was studied.The results show that the density of indoor vibration compaction is(1.011～1.035)times that of static compaction,and the compactness,unconfined compressive strength and fatigue life of vi-bration compaction specimens are closer to those of on-site compaction.The probability distribution of orientation angle of coarse aggregate in cement stabilized graded macadam mixture and the probability distribution of equivalent diameter of internal micro-voids all conform to Lorentz function model,and the coarse aggregate in vibration compaction and field compaction is closer to the"flat"state,and the distribution state of coarse aggregate is more stable.
万方数据
维普
