水泥基材料热-湿-碳化耦合模型数值分析及试验研究  

Numerical Analysis and Experimental Study on Heat-Moisture-Carbonation Coupling Model of Cement Based Materials

作　　者：李蓓[1,2] 金南国 田野[1] 金贤玉[1] 周启慧[2] LI Bei;JIN Nanguo;TIAN Ye;JIN Xianyu;ZHOU Qihui(College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China;Institute of Architectural Engineering,Zhejiang University of Water Resource and Electric Power,Hangzhou 310018,China)

机构地区：[1]浙江大学建筑工程学院,浙江杭州310058 [2]浙江水利水电学院建筑工程学院,浙江杭州310018

出　　处：《建筑材料学报》2020年第1期145-149,共5页Journal of Building Materials

基　　金：浙江省青年科学基金资助项目(LQ19E080020);国家重点基础研究发展计划(973计划)项目(2015CB655103);国家自然科学基金资助项目(51578497)

摘　　要：基于水泥基材料热湿耦合模型和水泥基材料碳化机理,结合水泥水化模型,得了到碳化初始状态下可碳化物质的含量、孔隙率、饱和度等参数,建立了水泥基材料热-湿-碳化耦合模型.该模型通过控制干空气、液态水及气态水的质量守恒关系,气、液态相二氧化碳和钙离子质量和能量守恒关系,结合水泥基材料的本构方程,建立了碳化数学模型的控制方程组.运用COMSOL多场耦合软件求解分析,对比验证了不同水灰比、不同碳化龄期下净浆碳化试验结果与数值计算结果,证明该模型是合理可靠的.Based on the heat-moisture coupling model of cement materials and the carbonation mechanism,a theoretical model of heat-moisture-carbonation for cement based materials was established,combining with the parameters such as the materials content that can be carbonated,porosity and saturation at the first stage of carbonation which was calculated by cement hydration model.The model was based on the mass conservation relationship of dry air,liquid water,steam water,gas-liquid phase carbon dioxide and the calcium ion and energy conservation relationship.The control equations of carbonization mathematical model in combination with constitutive equations of cement based materials.COMSOL multi-field coupling software is used to solve,compare and verify the carbonation test results and numerical calculation results of cement paste with different water-cement ratio at different carbonation ages,showing that the model is reasonable and reliable.

关 键 词：碳化 水灰比 净浆 多场耦合 多孔介质 

分 类 号：TU525[建筑科学—建筑技术科学]