掺ECC砂浆半柔性材料路用性能研究  

Study on performance of semi-flexible pavement mixed with ECC mortar

作　　者：肖天佑 蔡旭[1] 李翔 李聪 XIAO Tianyou;CAI Xu;LI Xiang;LI Cong(School of Civil Engineering,Guangzhou University,Guangzhou 510006,China)

机构地区：[1]广州大学土木工程学院,广东广州510006

出　　处：《混凝土》2020年第3期150-153,共4页Concrete

基　　金：国家自然科学基金项目(51708144);广州市科技计划项目(201510010110);广州市教育局科技项目(1201630223)。

摘　　要：半柔性路面指在空隙率20%以上的基体沥青混合料中灌入水泥浆而形成的复合路面,但半柔性路面的水泥基材料容易产生裂缝且修复工艺复杂,在一定程度上阻碍了这种路面材料的推广与应用。将纤维掺量为总体积1.3%的ECC砂浆灌入不同空隙率的基体沥青混合料中,并开展马歇尔试验、车辙试验、三点弯曲试验对其路用性能进行评价,并在水灰比相同的条件下与普通砂浆的性能进行比较。结果表明:掺ECC砂浆的半柔性路面材料有良好的整体性、高温稳定性、水稳定性,与普通水泥砂浆相比其低温抗裂性能更显著。Semi-flexible pavement refers to a kind of composite pavement by injecting cement slurry into asphalt mixture which has more than 20%void ratio.But the cement-based material of semi-flexible pavement is prone to cracks and the repairing process is complicated,so the popularization and application of semi-flexible pavement is hindered to some extent.In this study,mortar with 1.3%of total volume fiber dosages which was injected into asphalt mixture with which has different void fraction,Marshall test,rutting test and three-point bending test were carried out to evaluate its road performance,and were compared with ordinary mortar under the same water-cement ratio condition.The result indicates semi-flexible pavement material mixed with ECC mortar have good integrity,high temperature stability and water stability.Compared with ordinary cement mortar,the low-temperature and anti-cracking performance is remarkable.

关 键 词：半柔性路面 ECC砂浆 整体性 抗裂性能 

分 类 号：TU528.01[建筑科学—建筑技术科学]