基于复合改性的沥青路面耐久性与抗车辙性能研究

Research on Durability and Anti-Rutting Performance of Asphalt Pavement Based on Compound Modification

为有效减轻车辙病害对沥青路面服役性能的影响,本文采用高分散橡胶粉和再生PE进行沥青混合料的复合改性,经过两组不同配比的研究,最终确定添加15%橡胶粉 + 0.3%再生PE的沥青混合料的综合性能优异,其高温抗车辙能力明显优于SBS沥青混合料,同时低温稳定性和水稳定性较普通沥青混合料显著提升。通过基于温度–轴载的路面车辙预估模型计算和实验路铺筑验证,表明中面层采用复合改性沥青混合料,其车辙量大幅减小,具有良好的抗车辙性能,同时实现了固体废弃物资源化,经济与环境效益显著。

In order to effectively reduce the influence of the transaction performance of asphalt pavement disease, this paper uses high-dispersed rubber powder and regenerated PE for the composite modification of asphalt mixing materials. After two sets of different ratios, it is finally determined to add 15% rubber powder + 0.3%. The overall performance of the asphalt mixture of the regeneration PE is excellent, the high temperature anti-rutting performance can be significantly better than the SBS asphalt mixture, and the low temperature stability and water stability are significantly improved than those of ordinary asphalt mixtures. By temperature-axial road rutting estimation model calculation and experimental road feature verification, when the medium-sided layer uses a composite modified asphalt mixture, the number of cars has a large decrease, with a good anti-rutting performance, while achieving recycling solid waste and having remarkable economic and environmental efficiency.