水泥稳定再生集料基层性能试验研究与工程应用

Experimental Study and Engineering Application of Cement Stabilized Recycled Aggregate Pavement Base Course

为研究再生集料应用于高等级道路基层的可行性,对比测试了天然集料与再生集料的各项指标,进行了再生水泥稳定碎石路用性能试验研究,并铺筑了苏北地区某一级公路基层试验路。结果显示:再生集料满足路面基层材料的技术要求;水泥剂量4.5%、全再生集料水泥稳定碎石抗压强度满足规范及设计要求;再生水泥稳定碎石干缩系数较大,工程中需注意早期养护;试验路通车3个月后调查,没有发现明显开裂。

To study the feasibility of applying cement stabilized recycled aggregate to high-grade highway pavement base course,the technical indicators of recycled aggregate and natural aggregate were tested,the pavement performances of cement stabilized recycled aggregate were tested,and the first class highway test road was paved in northern Jiangsu area. The results show that the recycled aggregate reaches the material technical requirements of pavement base course. The strength of cement stabilized recycled aggregate with 4. 5% cement totally using recycled aggregate meets the strength requirement of high-grade highway base course. The shrink age coefficient of cement stabilized recycled aggregate is higher,so more attention should be paid to the early maintenance. Obvious cracking was not found on the test road after being opened to traffic for three months.