- 顧 萬，肖 鵬，楊宇軒，劉安安
引用本文摘 要：以揚州某快速通道改擴建項目為依托，對于原“白加黑”復合式道路銑刨、破碎產生的舊瀝青混凝土（RAP）和舊水泥混凝土（RA）進行再生水泥穩定碎石基層材料的適用性研究，將天然骨料（NA）、RA、RAP分別以不同比例摻配設計了9組不同的再生水泥穩定碎石，通過水泥穩定碎石干縮試驗、溫縮試驗和彎拉疲勞試驗，分析其收縮機理和抗疲勞性能。研究表明，RA材料的摻入會降低材料的收縮性能，在水泥穩定碎石中混入RAP材料后能夠降低材料對水和溫度的敏感性，提升材料的收縮性能。RAP材料中瀝青的有效成分能夠增強水泥穩定碎石材料間的嵌擠作用，提高材料的均勻性和整體性，提高水泥穩定碎石的抗疲勞性能。 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.