再生砖细骨料混凝土抗氯离子渗透性能与孔结构的灰色关联分析  

Grey Correlation Analysis between Chloride Permeability and Pore Structure of Concrete Incorporating Recycled Fine Aggregate from Clay Bricks

作　　者：赵顺波 朱瑞丰 党钧陶 苗伟 刘耘池 ZHAO Shunbo;ZHU Ruifeng;DANG Juntao;MIAO Wei;LIU Yunchi(School of Civil Engineering and Communication,North China University of Water Resources and Electric Power,Zhengzhou 450045,China;International Joint Research Lab for Eco-building Materials and Engineering of Henan,North China University of Water Resources and Electric Power,Zhengzhou 450045,China)

机构地区：[1]华北水利水电大学土木与交通学院,河南郑州450045 [2]华北水利水电大学河南省生态建材工程国际联合实验室,河南郑州450045

出　　处：《建筑材料学报》2025年第4期323-329,共7页Journal of Building Materials

基　　金：国家自然科学基金资助项目(52208247);河南省青年骨干教师培养计划项目(2024GGJS062)。

摘　　要：评价了不同粒径再生砖细骨料(RFCB)的表面活性,研究了RFCB颗粒级配、替代率和初始饱水度对再生砖细骨料混凝土(RBC)抗氯离子渗透性能和孔隙结构的影响.结果表明:在碱性环境下,RFCB的表面活性随其粒径减小而逐渐增大;RFCB的掺入增加了混凝土的总孔隙体积和孔隙率,但细化了其孔径分布,降低了其平均孔径和最可几孔径;RFCB还减小了混凝土的氯离子扩散系数和电通量,分别降低了19%~59%和24%~54%.最后,基于灰色关联理论和多元非线性回归分析,确定了与RBC抗氯离子渗透性能关联度最高的平均孔径、最可几孔径参数,建立了RBC氯离子扩散系数、电通量与孔结构参数的数学模型.The surface activity of recycled fine aggregate from clay brick(RFCB)with different particle size was evaluated.Furthermore,the effect of particle size distribution,replacement ratio and initial water saturation of RFCB on the chloride permeability and pore structure of concrete incorporating recycled fine aggregate from clay bricks(RBC)was carried out.The results show that the surface activity of RFCB increases with the decrease of particle size in the alkaline environment.The incorporation of RFCB increases the total pore volume and porosity of RBC,but refines the pore size distribution,thus reduces the average pore diameter and the critical pore diameter.The chloride diffusion coefficient and electric flux of RBC are also reduced by 19%-59%and 24%-54%,respectively.Based on the grey correlation theory,the average pore diameter and critical pore diameter parameters are more sensitive to the chloride permeability.On this basis,the mathematical models of chloride ion diffusion coefficient,electric flux and pore structure parameters are established using the multivariate nonlinear regression analysis.

关 键 词：再生砖细骨料 表面活性 电通量 氯离子扩散系数 孔结构 灰色关联度 

分 类 号：TU528.01[建筑科学—建筑技术科学]