Abstract:

The wide application of automotive scrap tires in the road industry allows for the recycling of resources and the reduction of black pollution. The purpose of this article was to investigate the long-term water stability and skid resistance of rubber aggregate composite seal, and to verify the feasibility of the 2D gray value method to determine the texture depth of pavement. In this article, the matrix analysis method was used to determine the optimal crumb rubber substitution scheme for the mixture at the micro-surface by taking the crumb rubber treatment method, substitution particle size and substitution proportion as the influencing factors, and the wet track abrasion value and the loaded wheel amount as the evaluation indexes. The micro-surface was compacted with the chip seal to form the rubber aggregate composite seal, and its wear resistant, rutting resistant, long-term water stability and skid resistant performance were analyzed. The results showed that the optimum amount of rubber particles (2—4mm) soaked in NaOH solution to replace crushed stone (2.36—4.75mm) was 30%, and the resulting rubber aggregate composite seal had high wear resistance, rutting resistance, skid resistance and long-term freeze-thaw resistance. The value of the empirical coefficient α determined by the 2D gray value method was 0.92 and the correlation coefficient was 0.989, which verified that it was feasible to determine the texture depth of pavement by the empirical coefficient α. Compared with ordinary composite seal, the cost of rubber aggregate composite seal increased, but the magnitude was small.

Key words: composite seal, crumb rubber, matrix analysis method, 2D gray value analysis, empirical coefficient

摘要：

汽车废旧轮胎在道路行业中的广泛应用，可以实现资源的回收利用，减少黑色污染。本文目的是探讨橡胶骨料复合封层的长期水稳定性和抗滑性能，验证2D灰度值法确定路面构造深度的可行性。本文采用矩阵分析法，以橡胶颗粒处理方式、替代粒径、替代比例为影响因素，将湿轮磨耗值和负轮黏砂量作为评价指标，确定了微表处混合料的最佳橡胶颗粒替代方案；将微表处与碎石封层压实形成橡胶骨料复合封层，并对其耐磨耗性能、抗车辙性能、长期水稳定性和抗滑性能进行了分析。结果表明，采用NaOH溶液浸泡的橡胶颗粒（2~4mm）替代碎石（2.36~4.75mm）的最佳量为30%，由此制备的橡胶骨料复合封层具有较高的耐磨耗性能、抗车辙性能、抗滑性能和长期抗冻融性能。采用2D灰度值法确定的经验系数α值为0.92，相关系数为0.989，验证了通过经验系数α确定路面构造深度是可行的。橡胶骨料复合封层与普通复合封层相比，造价有所增加，但是幅度很小。

关键词: 复合封层, 橡胶颗粒, 矩阵分析法, 2D灰度值分析, 经验系数