硅酸盐通报2024，Vol.43Issue(6)：2310-2316,7.
表面处理对再生骨料-沥青混合料路用性能的影响
Effect of Surface Treatment on Road Performance of Recycled Aggregate-Asphalt Mixture
摘要
Abstract
In order to enhance the utilization rate of recycled concrete aggregate(RCA),this paper proposes a method of ionic precipitation(MIP)to treat RCA by using a saturated solution of sodium bisulphate and calcium hydroxide combined with ultrasonic waves and organosilicon hydrophobes.The effects of MIP on the micro-morphology and physical properties of RCA,as well as the oil/stone ratio and road performance of asphalt mixtures,were analyzed.The test results show that the MIP resulted in the surface of RCA covered by a layer of alkaline cementitious materials.Moreover,the pores of RCA are filled with gypsum,calcium hydroxide and ettringite.Consequently,the crushing index,wear value and water absorption rate of RCA are reduced greatly.MIP treatment significantly reduces the optimal asphalt content of RCA-asphalt mixture and enhances interface adhesion,water stability and high-temperature stability.In addition,according to the test results,the replacement of 60％(mass fraction)original coarse aggregates by using of MIP-RCA can construct an asphalt mixture with excellent road performance and a low optimal asphalt content.关键词
混凝土再生骨料/表面处理/填充效应/沥青混合料/最佳油石比/路用性能Key words
recycled concrete aggregate/surface treatment/pore-filling effect/asphalt mixture/optimal asphalt content/road performance分类
土木建筑引用本文复制引用
杨飚,杨刚,陈静群,周祖衡,李庚英..表面处理对再生骨料-沥青混合料路用性能的影响[J].硅酸盐通报,2024,43(6):2310-2316,7.基金项目
广东省普通高校重点领域专项和创新团队项目(2019KZDZX2001,2023KCXTD005) （2019KZDZX2001,2023KCXTD005）
国家自然科学基金面上项目(52178209) （52178209）
