高性能混凝土抗氯离子扩散性能及扩散系数计算模型  

Resistance of diffusion of chloride ions of concrete and model for computation of diffusion coefficient

作　　者：杨国平[1] 陈际丰[1] 田琦[1] 古李田 贡金鑫[2] YANG Guoping;CHEN Jifeng;TIAN Qi;GU Litian;GONG Jinxin(CCCC Water Transportation Consultants Co.,Ltd.,Beijing 100007,China;School of Infrastructure Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]中交水运规划设计院有限公司,北京100007 [2]大连理工大学建设工程学院,辽宁大连116024

出　　处：《混凝土》2025年第2期8-12,20,共6页Concrete

基　　金：国家重点研发计划项目(2022YFB2603000)。

摘　　要：对42组不同配合比的混凝土进行了氯离子扩散系数试验,分析了水胶比、矿物掺合料(粉煤灰、矿渣、硅灰)掺量和龄期对氯离子扩散系数的影响;在此基础上,建立了综合反映水胶比及矿物掺合料掺量的养护28 d混凝土的氯离子扩散系数计算式。计算式简单、实用,计算结果与试验结果符合良好,可用于海水环境混凝土结构耐久寿命的预测。Experiment is carried out on 42 groups of concrete specimens with different mix proportion,and the effect of mineral admixtures,including fly ash,slag and silica fume,and curing age on diffusion coefficient of chloride ions of concrete is studied.On this basis,equation relating diffusion coefficient of chloride ions of concrete cured for 28 d with mix proportion,content of mineral admixtures is presented.The proposed equation is simple and practical used in prediction of durable life of concrete structures in marine environment.

关 键 词：海水环境 高性能混凝土 氯离子扩散系数 矿物掺合料 

分 类 号：TU528.01[建筑科学—建筑技术科学]