废弃纤维再生混凝土碳化深度预测模型研究  

Carbonation Depth Prediction Model of Waste Fiber Recycled Concrete

作　　者：王建超[1] 裘子铭 陆佳韦 周静海[1] WANG Jianchao;QIU Ziming;LU Jiawei;ZHOU Jinghai(School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, China)

机构地区：[1]沈阳建筑大学土木工程学院,沈阳110168

出　　处：《硅酸盐通报》2020年第5期1503-1510,1516,共9页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(51678374);辽宁省教育厅资助项目(LJZ2017028);辽宁省科技厅资助项目(20180550696)。

摘　　要：在碳化理论的基础上,通过引入气体扩散理论和分形理论,基于一般正常环境下混凝土结构耐久性产生影响的因素(粉煤灰、矿渣微粉及工作应力),研究单一因素下废弃纤维再生混凝土的碳化性能规律。同时,将烧重试验、压汞试验和碳化试验所得数据进行分析,建立上述相关因素与有效扩散系数De^c的量化关系。此外,考虑到粉煤灰、矿渣微粉和工作应力的存在对废弃纤维再生混凝土的碳化性能影响,引入了粉煤灰影响系数、矿渣微粉影响系数和工作应力影响系数。通过模型计算值和试验结果的比较验证碳化深度预测模型的可行性,建立适用于废弃纤维再生混凝土碳化深度预测的实用模型。On the basis of carbonization theory,gas diffusion theory and fractal theory were applied in this study.The factors(fly ash,slag and working stress),which affect the durability of concrete structures in general atmospheric environment were selected.The carbonation behavior of waste fiber recycled concrete under single factor was studied experimentally.By analyzing the data obtained from loss on ignition test,MIP(Mercury Intrusion Porosimetry)and concrete carbonization test,the relationship between effective diffusion coefficient De^c and related factors were built.Meanwhile,the influence of fly ash,slag and working stress on carbonization properties of waste fiber recycled concrete were considered.Therefore,corresponding influencing efficiencies were introduced.The comparison between the calculated values and the experimental results verifies the feasibility of the carbonation depth prediction model,which provides a scientific basis for the life prediction of the waste fiber recycled concrete structure in the general atmospheric environment.

关 键 词：废弃纤维再生混凝土 碳化深度 分形维数 碳化深度预测模型 

分 类 号：TU528[建筑科学—建筑技术科学]