- 顾 万，肖 鹏，杨宇轩，刘安安
引用本文摘 要：以扬州某快速通道改扩建项目为依托，对于原“白加黑”复合式道路铣刨、破碎产生的旧沥青混凝土（RAP）和旧水泥混凝土（RA）进行再生水泥稳定碎石基层材料的适用性研究，将天然骨料（NA）、RA、RAP分别以不同比例掺配设计了9组不同的再生水泥稳定碎石，通过水泥稳定碎石干缩试验、温缩试验和弯拉疲劳试验，分析其收缩机理和抗疲劳性能。研究表明，RA材料的掺入会降低材料的收缩性能，在水泥稳定碎石中混入RAP材料后能够降低材料对水和温度的敏感性，提升材料的收缩性能。RAP材料中沥青的有效成分能够增强水泥稳定碎石材料间的嵌挤作用，提高材料的均匀性和整体性，提高水泥稳定碎石的抗疲劳性能。 Abstract: Based on the reconstruction and expansion project of southern Yangzhou, the applicability of the original "white plus black" compound road milling, broken old asphalt concrete (RAP) and old cement concrete (RA) for recycled cement stabilized macadam base material was studied, and NA, RA and RAP were designed with different proportions of 9, respectively. The shrinkage mechanism and fatigue properties of the cement stabilized macadam were analyzed by the dry shrinkage test of cement stabilized macadam, the temperature shrinkage test and the flexural fatigue test. The study shows that RA can reduce the shrinkage property of the material, and after mixing with RAP in the cement stabilized macadam, the sensitivity of the material to water and temperature can be reduced and the shrinkage performance of the material is improved. The effective composition of asphalt in RAP material can enhance the inlay and extrusion of cement stabilized macadam material, improve the uniformity and integrity of the material, and improve the fatigue resistance of the cement stabilized macadam.