Damage and deterioration model of concrete based on COMSOL in sulfate environment

doi:10.13245/j.hust.210321

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Damage and deterioration model of concrete based on COMSOL in sulfate environment
	Qiao, Hongxia 1,2; Qiao, Guobin 1; Lu, Chenggong 1
刊名	Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and Technology (Natural Science Edition)
	2021-03-23
卷号	49 期号:3 页码:119-125
关键词	Concretes Deterioration Diffusion Environmental regulations Ions MATLAB Sulfur compounds Chemical equilibriums Comsol multiphysics Dependent variables Deterioration modeling Evaluation parameters Independent variables Initial conditions Nondestructive detection
ISSN号	1671-4512
DOI	10.13245/j.hust.210321
英文摘要	Through the combination of Fick's second law and modified Davis equation, the numerical simulation process of ion diffusion of concrete in the pure immersion environment of sulfate ions under multi-ion coupling was established, and the relationship between ions and corrosion products was established through chemical equilibrium, which was finally simplified model of pure sulphate immersion. Matlab and COMSOL Multiphysics were used to establish the model of sulfate ion diffusion. Taking time as the independent variable, by setting the initial conditions such as temperature and concentration, the final evaluation parameters of the dependent variable such as corrosion product concentration, porosity and strain field were obtained. Considering the initial modeling conditions of concrete specimens and the complex factors in the process of sulfate ion corrosion, some simplifications and assumptions were made for the diffusion and corrosion process. The modeling results show that as the simulated corrosion progresses, the free sulfate ions inside the concrete tend to stabilize, while the cured sulfate ions increase with the corrosion. The simulation results can be combined with the non-destructive detection method to use the thickness of the damaged layer to predict the durability of the concrete. © 2021, Editorial Board of Journal of Huazhong University of Science and Technology. All right reserved.
语种	中文
出版者	Huazhong University of Science and Technology
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/148454]
专题	土木工程学院
作者单位	1.School of Civil Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Western Center of Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Qiao, Hongxia,Qiao, Guobin,Lu, Chenggong. Damage and deterioration model of concrete based on COMSOL in sulfate environment[J]. Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and Technology (Natural Science Edition),2021,49(3):119-125.
APA	Qiao, Hongxia,Qiao, Guobin,&Lu, Chenggong.(2021).Damage and deterioration model of concrete based on COMSOL in sulfate environment.Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and Technology (Natural Science Edition),49(3),119-125.
MLA	Qiao, Hongxia,et al."Damage and deterioration model of concrete based on COMSOL in sulfate environment".Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and Technology (Natural Science Edition) 49.3(2021):119-125.