水泥-泡沫沥青半柔性冷再生混合料物理力学性能研究

Research on the physical and mechanical performance of the semi-flexible cold-recycled material with cement-foamed asphalt

目前,我国很多地区都在针对水泥混凝土损坏路面展开大量的改造工程,然而反射裂缝是改造后沥青面层后出现的常见问题,由于半柔性道路材料兼有高强度和高韧性的特点,可用作加铺中的应力吸收层,用来解决出现反射裂缝的问题,因此,本文在泡沫沥青冷再生技术研究成果的基础上,研发了水泥-泡沫沥青半柔性冷再生混合料,并通过与两种冷再生工程中常用的泡沫沥青混合料进行对比试验研究,发现其具有良好的物理力学性能,能够获得较好的密实性、理想的高承载性与高韧性以及较高的抗剪强度,希望能为解决旧水泥路面加铺沥青面层发生反射裂缝问题,提供一种新的方法。

At present,aimed at the damage of the cement road surface in many regions of china,a lot of renovation projects are carry out,however reflective crack is the common problem when the asphalt surface layer is added on the old cement road surface.With the material characteristics of high strength and high tenacity,the semi-lexible material witch taken as a stress absorbed layer is used to solve the problem of reflective crack.Therefore,based on the research achievement of cold-recycled technology using foamed asphalt,the semi-flexible material with cement-foamed asphalt has been invented.By comparing two kinds of general cold-recycled mixtures using foamed asphalt,it is found that the semi-flexible material has good physical and mechanical properties,and it can gain better density and the ideal high-performance of load-carrying and toughness and higher shear strength,if it is used as a stress absorbed layer.So the material can reduce the emergence of reflective crack.