应用于基层生沥青骨料的水泥稳定研究

Study on Cement Stability of Recycled Asphalt Aggregate Applied to Base Layer

将用水泥稳定的再生沥青路面骨料和新骨料的混合料作为基层材料来进行试验评价性研究。在再生沥青路面骨料与新骨料(以下简称新旧混合料)不同比例时,分别对混合料的压实和无侧限抗压强度进行试验研究。结果表明:再生沥青路面的骨料的最佳含水量、最大干密度和强度随着水泥和新骨料的加入而变大,同时养护时间的增加也会提高其强度。用水泥进行稳定的再生沥青骨料比只加入新骨料混合料的路用性能更好。通过水泥稳定的新旧混合料应当是一种可行的骨架密实型路面基层结构材料。

The experimental evaluation study was carried out with cement stabilized recycled asphalt pavement aggregate and new aggregate mixture as the base material.When the recycled asphalt pavement aggregate and the new aggregate (hereinafter referred to as the new and old mix) have different proportions, the compaction and unconfined compressive strength of the mixture are tested separately.The results show that the optimum water content, maximum dry density and strength of the aggregate of recycled asphalt pavement become larger with the addition of cement and new aggregate, and the increase of health time will also increase its strength. Stabilized recycled bituminous aggregates with cement have better road performance than blends with only new aggregates.The new and old mix stabilized by cement should be a viable skeleton-compact pavement base material.