基于性能提升的新型水泥稳定碎石混合料开发  

Development of a New Type of Cement Stabilized Crushed Stone Mixture Based on Performance Improvement

作　　者：嵇磊 张孝胜 刘朝晖 王弘 JI Lei;ZHANG Xiaosheng;LIU Zhaohui;WANG Hong(China Design Testing Technology Co,.Ltd.,Nanjing 211100,China;Jiangsu Provincial Transportation Engineering Construction Bureau,Nanjing 210004,China;Jiangsu Sinoroad Engineering Technology Research Institute Co,.Ltd.,Nanjing 211800,China)

机构地区：[1]华设检测科技有限公司,南京211100 [2]江苏省交通工程建设局,南京210004 [3]江苏中路工程技术研究院有限公司,南京211800

出　　处：《科技和产业》2024年第23期210-217,共8页Science Technology and Industry

摘　　要：水泥稳定碎石半刚性基层在国内高速公路建设中使用广泛。针对其材料特性和开裂机理,采用外掺添加剂的方式进行新型水稳混合料的开发,以收缩抗裂指标作为主要筛选依据,创新性采用振弦式表面应变计测量水稳混合料收缩应变。采用干缩、温缩、弯拉、无侧限抗压强度试验进行水稳混合料性能的对比筛选,得到添加剂的最佳组合参数,综合对比优选出最佳的添加剂材料及工艺参数。Cement stabilized crushed stone semi-rigid base is widely used in the construction of highways in China.Based on its material characteristics and cracking mechanism,a new type of water stable mixture is developed by adding external additives.The shrinkage and crack resistance index was used as the main screening basis,and an innovative vibrating wire surface strain gauge is used to measure the shrinkage strain of the water stable mixture.Dry shrinkage,thermal shrinkage,flexural tension,and unconfined compressive strength tests were used to compare and screen the performance of the water stable mixture,and the optimal combination parameters of additives are obtained.The best additive material and process parameters are selected through comprehensive comparison and optimization.

关 键 词：水泥稳定碎石 半刚性基层 抗裂性能 添加剂改性 振弦式应变仪 

分 类 号：U414[交通运输工程—道路与铁道工程]