双掺陶粒轻质高强混凝土的力学及耐久性能试验研究  

Experimental study on the mechanical and durability properties oflightweight high-strength concrete co-doped with shale andclay ceramsites

作　　者：李沛[1,2] 刘昊奇 李俊毅 李杰[1,2] LI Pei;LIU Hao-qi;LI Jun-yi;LI Jie(Tianjin Port Engineering Institute Co.,Ltd.of CCCC First Harbor Engineering Co.,Ltd.,Tianjin 300222,China;CCCC First Harbor Engineering Co.,Ltd.,Tianjin 300461,China)

机构地区：[1]中交天津港湾工程研究院有限公司,天津300222 [2]中交第一航务工程局有限公司,天津300461

出　　处：《中国港湾建设》2024年第6期50-55,共6页China Harbour Engineering

基　　金：中交第一航务工程局有限公司科技研发项目(2019-8-19)。

摘　　要：通过在混凝土中掺入黏土陶粒和页岩陶粒,使其具备较高强度的同时具有较低的干表观密度和较好的耐久性能,旨在探索制备28 d干表观密度不大于1950 kg/m3、28 d强度不小于50 MPa的轻质高强混凝土(Lightweight High-Strength Concrete,缩写:LWHSC)的方法。同时研究了黏土陶粒和页岩陶粒双掺对轻质高强混凝土抗压强度、干表观密度和耐久性的影响。结果表明,所制备的LWHSC的抗压强度试件破坏形态无异于普通混凝土,但使用黏土陶粒部分替代页岩陶粒可有效降低LWHSC干表观密度;适当增加胶凝材料用量并辅以优化陶粒的双掺比例,对除抗冻性以外的其它耐久性能具有一定的改善作用。研究成果可为认识、优化和开发页岩陶粒和黏土陶粒双掺LWHSC及其在工程中的应用提供参考。In order to make the concrete have a higher strength with a lower dry apparent density and better durability,the clay and shale ceramsites were incorporated into the concrete,aiming to explore a method for preparing Lightweight High-Strength Concrete(LWHSC)with 28 d dry apparent density not exceeding 1950 kg/m3 and 28 d strength not less than 50 MPa.The effects of clay and shale ceramsites on compressive strength,dry apparent density and durability of LWHSC were studied.The results show that the failure pattern of the compressive strength specimens of LWHSC prepared is no different from that of ordinary concrete,but the dry apparent density of LWHSC can be effectively reduced by partially replacing shale ceramics with clay ceramics.Proper increase of cementitious materials and the optimization of the co-doping ratio of ceramsites can improve the durability property of other materials except frost resistance.The research results can provide reference for understanding,optimizing and developing LWHSC co-doped with shale and clay ceramsite and its application in engineering.

关 键 词：轻质高强混凝土 页岩陶粒 黏土陶粒 双掺 力学性能 耐久性能 

分 类 号：U654[交通运输工程—港口、海岸及近海工程] TU528.2[交通运输工程—船舶与海洋工程]