高速公路改扩建中乳化沥青冷再生混合料设计方法优化研究

Optimization Research on Design Method of Cold Recycled Asphalt Mixtures in Highway Reconstruction and Expansion

摘要: 结合某高速改扩建工程乳化沥青冷再生试验段，分别对乳化沥青厂拌冷再生混合料采用旋转压实成型方法和大马歇尔成型方法进行混合料的设计，对两种成型方法的混合料最佳含水率、混合料的体积指标、混合料的性能进行分析。实验结果表明，两种设计方法的混合料技术指标存在一定的差异，项目采用旋转压实70次和采用大马歇尔双面击实150次的混合料体积指标和性能指标相近，通过与试验路取芯状况的对比，确定本项目采用马歇尔双面击实150次和旋转压实70次作为本项目的混合料成型方法。

Abstract: Combined with emulsified asphalt cold recycled mixture test section in an expressway reconstruc-tion and expansion project, emulsified asphalt cold recycled mixture was designed by rotary compaction method and big Marshall method, and optimum moisture content, volume index and performance of the mixture between the two Molding methods were analyzed. The results showed that there was a certain difference in the technical indicators of mixture between the two molding methods. The volume index and performance index of mixture through 70 times by rotary com-paction and double-sided 150 times by big Marshall compaction were similar. By comparison with core condition of test road, mixture molding method of 70 times by rotary compaction and dou-ble-sided 150 times by big Marshall compaction was determined in this project.