ABSTRACT

Microsurfacing is a mixture of aggregates, cement, bitumen polymer emulsion (BPE), filler, water and chemical additives. In BPE that is a combination of bitumen, emulsifier, hydrochloric acid, water and liquid polymer, the type and amount of emulsifier affect its performance. The aim of this study is to investigate the performance characteristics of microsurfacing made by BPE with different percentages of emulsifiers. Mixing time, cohesion, wet track abrasion, loaded wheel and Schulze tests are performed. The samples are made with 3% of three different emulsifiers and also with 3% of BPE. The results show that increasing the amount of emulsifiers and BPE in abrasion, adhesion, mixing time and loaded wheel tests lead to an increase in the adhesion, bitumen coating on grains, mixing time and sand adhered, respectively. In addition, samples made by emulsifier type I have better performance than type II in loaded wheel and abrasion tests, but the optimum bitumen obtained from these tests is lower in the compounds of type II than those of type I. Also, samples containing type III do not exhibit good performance. Thus, the type, percentage of emulsifier and percentage of BPE have significant effects on the performance characteristics of the microsurfacing.

摘要

微表面处理是骨料、水泥、沥青聚合物乳液 (BPE)、填料、水和化学添加剂的混合物。在由沥青、乳化剂、盐酸、水和液态聚合物组成的 BPE 中，乳化剂的种类和用量会影响其性能。本研究的目的是研究由 BPE 与不同百分比的乳化剂制成的微表面处理的性能特征。进行混合时间、内聚力、湿履带磨损、加载车轮和舒尔茨测试。样品由 3% 的三种不同乳化剂和 3% 的 BPE 制成。结果表明，在磨损、附着力、混合时间和负载轮试验中增加乳化剂和 BPE 的量分别导致附着力、颗粒上的沥青涂层、混合时间和沙子粘附的增加。此外，由 I 型乳化剂制成的样品在负载车轮和磨损试验中比 II 型具有更好的性能，但从这些测试中获得的最佳沥青在 II 型化合物中低于 I 型化合物。此外，含有 III 型的样品不会表现出很棒的表演。因此，乳化剂的类型、百分比和 BPE 的百分比对显微表面处理的性能特征有显着影响。