乳化沥青冷再生混合料水稳定性试验

Research on Water Stability of Cold Recycled Mixtures with Emulsified Asphalt

水稳定性是乳化沥青冷再生技术中的关键指标之一。通过实验室试验,发现水泥吸水水化,提高了混合料的早期强度与水稳定性;足够的养生时间对路面强度和水稳定性的影响很大,施工完毕后水分的散失和水泥的凝结使该阶段再生基层强度及水稳定性得以增长;充足的新加细集料加上再生混合料中本身含有适量的粗集料,确保形成骨架密实结构和一定的内摩擦阻力,使再生混合料初期具有较好的强度和水稳定性。

Water stability is one of the key indicators of emulsified asphalt cold recycling technology. Through laboratory tests, it was found that absorption and hydration of cement could improve the initial strength and water stability of the mixture. Adequate curing time could exert great influence on the road strength and water stability. After construction, loss of moisture and condensation of cement could further enhance the strength and water stability of recycling base. Plenty of new fine aggregate with coarse aggregate in RAP could ensure the dense skeleton structure and internal friction resistance, therefore it could guarantee strength and water stability at the initial stage.