Research and Engineering Application of High Content RAP Regenerated Cement Stabilized Macadam Base Technology for Expressway
Based on physical and mechanical property evaluation and screening test results of Reclaimed Asphalt Pavement(RAP)materials and new aggregates,four groups of gradation schemes with different RAP contents are designed by using the design method of graded blending.After compaction,the road performance test is carried out to analyze the unconfined compressive strength,compressive rebound modulus and dry shrinkage performance,so as to study the influence of RAP with different contents on the road performance of cement stabilized macadam base mixture.The test results show that with the increase of the proportion of RAP,the optimum water content increases and the maximum dry density decreases.In addition,with the increase of RAP ratio,the cement stabilized macadam base mixture specimen shows the law of decreasing compressive strength and rebound modulus and increasing dry shrinkage performance.Finally,the engineering application of high content RAP recycled cement stabilized macadam base is carried out based on the expressway test section.The post-construction test results show that the test indexes of the base in the test section meet the requirements of the design specification.
NETL
NSTL
万方数据
维普
