Bi Yanqiu, Li Rui, Han Sen, Pei Jianzhong, Zhang Jiupeng
School of Highway, Chang'an University, Xi'an 710064, China.
Materials (Basel). 2020 Mar 9;13(5):1224. doi: 10.3390/ma13051224.
Patching is one of the most common maintenance methods for potholes in roads. In order to improve the performance of cold-patching asphalt mixtures, an emulsified asphalt modified with waterborne epoxy resin was developed. Two waterborne epoxy resins and two curing agents were selected. The optimal experimental contents of the curing agents were obtained by measuring the compressive strength of the waterborne epoxy mortar (WEM) under different curing agent contents and curing period. The difference between the two waterborne epoxy resins was obtained by the flexural strength and stress-strain curves, which were measured by the modified bending test on the WEM. The evaluation method of the initial strength and forming strength of the waterborne epoxy emulsified asphalt mixture (WEEAM) was proposed by the experimental study of the compaction molding method and curing conditions. The high temperature performance, low temperature performance, and moisture susceptibility of the mixture were verified by comparing various kinds of WEEAM. The results show that using WEEAM as a road repair material has great advantages in improving pavement performance and road service levels.
修补是道路坑洼最常见的养护方法之一。为提高冷补沥青混合料的性能，研发了一种水性环氧树脂改性乳化沥青。选用了两种水性环氧树脂和两种固化剂。通过测量不同固化剂含量和养护期下水性环氧砂浆（WEM）的抗压强度，得出固化剂的最佳实验用量。通过对WEM进行改进的弯曲试验测量其抗弯强度和应力应变曲线，得出两种水性环氧树脂之间的差异。通过对压实成型方法和养护条件的试验研究，提出了水性环氧乳化沥青混合料（WEEAM）初始强度和成型强度的评价方法。通过比较各类WEEAM，验证了该混合料的高温性能、低温性能和水稳定性。结果表明，使用WEEAM作为道路修补材料在改善路面性能和道路服务水平方面具有很大优势。
