Carbonation process simulation for cement-based materials based on microstructure by a cement hydration model

被引：17
作者：
Li, Bei [1 ,3 ]
Jiang, Zhilu [2 ]
Jin, Nanguo [3 ]
Tian, Ye [3 ]
Jin, Xianyu [3 ]
机构：
[1] Zhejiang Univ Water Resources & Elect Power, Coll Civil Engn & Architecture, Hangzhou 310018, Peoples R China
[2] Shenzhen Univ, Coll Civil & Transportat Engn, Guangdong Prov Key Lab Durabil Marine Civil Engn, Shenzhen 518060, Peoples R China
[3] Zhejiang Univ, Coll Civil Engn & Architecture, Hangzhou 310058, Peoples R China
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2020年 / 259卷
关键词：
Concrete carbonation; Partial carbonation zone; Cement hydration; Numerical simulation; Coupled heat and moisture transport; CONCRETE; MOISTURE; DIFFUSIVITY; CORROSION; CLIMATE; MORTAR;
D O I：
10.1016/j.conbuildmat.2020.120429
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Based on three-dimensional distributions of cement particles, cement hydration was simulated to obtain the hydrate content and the pore structure of cement paste. Additionally, the porosity of mortar and concrete was obtained by considering aggregate inclusion and interfacial transition zones (ITZ). Then, a coupled model for heat transfer, moisture transport and carbonation in cement-based materials was established. The experimental carbonation results agreed well with the simulated results for mortars and concretes with different water-cement ratios. The carbonation reaction front was far beyond the complete carbonation depth. The aggregate dilution had a more significant effect on carbonation than the ITZ did. (C) 2020 Elsevier Ltd. All rights reserved.
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页数：11
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