Influence of Different Compaction Methods on Performance of Cement Stabilized Macadam Mixture
Based on the unconfined compressive strength,flexural strength,dynamic rebound modulus,temperature shrinkage test and three-point loading fatigue test,this paper compared and analyzed the mechanical properties,deformation characteristics and fatigue characteristics of static pressure forming,vibration forming and field compaction specimens.The result shows that,with respect to the 7-day unconfined compressive strength,flexural strength,dynamic rebound modulus and fatigue properties of the specimens,the priority of influence among the three compaction methods is ranked as:field compaction＞vibration forming＞static pressure forming.The mechanical properties,temperature shrinkage coefficient and fatigue life of the vibrating compaction specimens are closer to those of the field compaction.The application of vibrating compaction in the mix design stage can reduce the cement dosage and cut down the production cost of cement stabilized macadam mixture.Further,it is safer for the vibrating compaction specimen to test the mechanical properties and fatigue characteristics of the cement stabilized macadam mixture.Therefore,it is suggested that vibrating compaction technology should be popularized and applied in the design stage of cement stabilized macadam mixture.
万方数据
维普
