早强高性能喷射混凝土在隧道工程中的应用  

Application of early strength and high-performance shotcrete in tunnel engineering

作　　者：邓怡玄 李泰山 刘远 王康伏 罗素琼 DENG Yixuan;LI Taishan;LIU Yuan;WANG Kangfu;LUO Suqiong(Guizhou Tianwei Building Materials Technology Co.,Ltd.,Guiyang 550025,China;China Railway Fifth Bureau Group Chengdu Engineering Co.,Ltd.,Chengdu 610000,China;Guizhou Railway Construction Engineering Quality Inspection Consulting Co.,Ltd.,Guiyang 550000,China)

机构地区：[1]贵州天威建材科技有限责任公司,贵州贵阳550025 [2]中铁五局集团成都工程有限责任公司,四川成都610000 [3]贵州铁建工程质量检测咨询有限公司,贵州贵阳550000

出　　处：《混凝土与水泥制品》2025年第4期77-80,共4页China Concrete and Cement Products

摘　　要：依托某隧道工程,对比研究了不同减水剂(普通、专用)和液体无碱速凝剂(HQ-241、TS9)对喷射混凝土拌合物性能、初凝时间、回弹率和抗压强度的影响。结果表明:与采用普通减水剂和HQ-241速凝剂的喷射混凝土相比,采用专用减水剂和TS9速凝剂的喷射混凝土的综合性能较好,其拌合物性能能够维持2 h内基本一致,泵送压力低于10 MPa,回弹率低于10%,8 h抗压强度为5.6 MPa,1、3、7、28 d抗压强度分别为18.6、31.2、38.9、48.2 MPa。Based on a certain tunnel project,a comparative study was conducted on the effects of various water reducing agents(ordinary and special)and liquid alkali-free flash setting admixture(HQ-241 and TS9)on the mixture performance,initial setting time,rebound rate,and compressive strength of shotcrete.The results show that,compared with the shotcrete using ordinary water reducing agent and HQ-241 flash setting admixture,the shotcrete using special water reducing agent and TS9 flash setting admixture has better comprehensive performance.Its mixture performance can be maintained basically the same within 2 h,with a pumping pressure below 10 MPa,a rebound rate below 10%,8 h compressive strength of 5.6 MPa,and 1 d,3 d,7 d,and 28 d compressive strengths of 18.6 MPa,31.2 MPa,38.9 MPa,and 48.2 MPa,respectively.

关 键 词：高性能喷射混凝土 减水剂 速凝剂 抗压强度 早期强度 回弹率 

分 类 号：TU528.042[建筑科学—建筑技术科学]