防渗面板水工沥青混凝土试拌试铺方案 设计与试验分析  

Test Analysis and Design of Trial Mixing and Paving for Hydraulic Asphalt Concrete of Anti-seepage Panels

作　　者：华召 余世海 莫智云 磨炼同[2] HUA Zhao;YU Shi-hai;MO Zhi-yun;MO Lian-tong(China Gezhouba Group Co Ltd,Wuhan 430030,China;State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]中国葛洲坝集团股份有限公司,武汉430030 [2]武汉理工大学硅酸盐建筑材料国家重点实验室,武汉430070

出　　处：《建材世界》2023年第5期74-77,共4页The World of Building Materials

摘　　要：通过施工条带和碾压区优化设计,提出防渗面板水工沥青混凝土试拌试铺试验方案,分析沥青混合料摊铺后降温特性以及不同碾压工艺对现场压实度的影响,同时探讨现场芯样孔隙率与无核密度检测结果的相关性。试验结果表明现场温度降温速度为0.8~1.0℃/min,摊铺后可保证至少有1 h的施工碾压时间,振动复压2遍可达到现场孔隙率要求,低温施工和接缝处应适当增加碾压遍数,无核密度仪检测对于孔隙率超标的芯样辨别度高,可用于现场质量快速无损检测。Based on the optimal design of the construction strips and the compaction areas,the trial mix and paving test plan of hydraulic asphalt concrete of anti-seepage panels was proposed.The characteristic of temperature decline after mixture paving was investigated as well as the effect of compaction technique on the compaction degree.The relation between the air void content of drilled cores and non-nuclear density was examined.Test results showed that the rate of temperature drop was about 0.8~1.0℃/min and this ensured at least 1 h for compaction time after paving.The air void content could reach the related requirements after two passes of vibrating compaction.The number of compaction pass should be increased for construction at low temperatures and joints.non-nuclear densities were able to distinguish the cores with high air void contents and thus could be used for the rapid and nondestructive testing of field quality control.

关 键 词：水工沥青混凝土 试拌试铺 碾压工艺 孔隙率 无核密度 

分 类 号：TV431.5[水利工程—水工结构工程]