湿喷混凝土添加纳米回弹抑制剂在工程中的应用

Application of Nano Rebound Inhibitor for Wet Shotcrete in Engineering

喷射混凝土的施工工艺有三种:干喷、潮喷和湿喷。通常隧洞施工要求采用湿喷工艺,不允许采用干喷工艺。在喷射混凝土施工中,回弹率过高会造成材料的极大浪费、施工作业时间的延长,进而增大施工成本并使施工现场空气中的粉尘含量过高而造成施工环境不达标。本文阐述了在湿喷混凝土中添加纳米回弹抑制剂前后从室内和现场性能测试两个方面进行的对比试验,并对试验成果进行了总结。

There are three construction technologies of shotcrete:dry spraying,damp spraying and wet spraying.Usually wet spraying is required in tunnel construction,and dry spraying is not allowed.In shotcrete construction,high rebound rate will result in great waste of materials,prolonged construction time,increased construction cost,and high dust content in the air of the construction site,resulting in substandard construction environment.In this paper,comparative tests before and after adding nano rebound inhibitor to wet-sprayed concrete were conducted from both laboratory and field,and the test results were summarized.