Numerical simulation of two-dimensional chloride diffusion in saturated and cracked concrete

被引：0

作者：

Shen Z. ^{[1
]}

Bie S. ^{[1
]}

Liu X. ^{[2
]}

Ni M. ^{[1
]}

Wang S. ^{[3
]}

机构：

[1] State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin

[2] School of Civil Engineering, Texas A&M University, Texas

[3] CCCC Fourth Harbor Engineering Institute Co. Ltd., Guangzhou

来源：

Tianjin Daxue Xuebao (Ziran Kexue yu Gongcheng Jishu Ban)/Journal of Tianjin University Science and Technology | 2016年 / 49卷 / 01期

关键词：

Chloride diffusion; Concrete durability; Crack; Finite difference; Numerical simulation; Structural engineering;

D O I：

10.11784/tdxbz201403089

中图分类号：

学科分类号：

摘要：

Numerical simulation of two-dimensional chloride diffusion is carried out in the crack area of saturated and cracked concrete. Based on correction model of Fick's second law and two-dimensional model of chloride diffusion, a finite differential model for chloride diffusion in cracked concrete is established. A calculation program is coded and turns out to be effective through the comparison with experimental results. The effect of crack, water-binder ratio, attenuation coefficient and time on chloride diffusion is analyzed through the established numerical model. The concept of crack-affected zone is put forward, within which, chloride diffuses in two-dimensional way, and beyond which, chloride diffuses in one-dimensional way. There are three stages in chloride diffusion, including rapid diffusion period, transitional period and slow diffusion period. The simulation results show that crack depth has significant effect on chloride diffusion in the long-term situation, while crack width nearly makes no difference. © 2016, Tianjin University. All right reserved.

引用

页码：103 / 110

页数：7

共 21 条

[1]

Mehta P.K., Burrows R.W., Building durable structures in the 21st century, Concrete International, 23, 3, pp. 57-63, (2001)

[2]

Sahmaran M., Li M., Li V.C., Transport properties of engineered cementitious composites under chloride exposure, ACI Materials Journal, 104, 6, pp. 604-611, (2007)

[3]

Li R., Yang L., Feng Q., Analysis of chloride diffusion in concrete based on the initial age of concrete and coefficient of attenuation age, Concrete, 7, pp. 40-44, (2008)

[4]

Zhou X., Li K., Chen Z., Simulation analysis of chloride penetration in concrete with finite volume method, Engineering Mechanics, 30, 7, pp. 34-39, (2013)

[5]

Lin G., Xiang Z., Liu Y., Et al., Initiation time prediction of reinforcement corrosion in concrete structures exposed to chloride environment, Engineering Mechanics, 27, 9, pp. 147-153, (2010)

[6]

Li Z., Liu C., Anpan L.-C., Et al., Experiment on anti-corrosion property of steel in chloride concrete, Journal of Tianjin University: Science and Technology, 48, 3, pp. 219-224, (2015)

[7]

Liu C., Chen L., Zhu H., Influence of crumb rubber proportion on durability of reinforced concrete beams exposed to chloride aggressive environment, Journal of Tianjin University, 44, 1, pp. 40-45, (2011)

[8]

Gerard B., Marchand J., Influence of cracking on the diffusion properties of cement-based materials(Part I): Influence of continuous cracks on the steady-state regime, Cement and Concrete Research, 30, 1, pp. 37-43, (2000)

[9]

Sahmaran M., Effect of flexure induced transverse crack and self-healing on chloride diffusivity of reinforced mortar, Journal of Materials Science, 42, 22, pp. 9131-9136, (2007)

[10]

Djerbi A., Bonnet S., Khelidj A., Et al., Influence of traversing crack on chloride diffusion into concrete, Cement and Concrete Research, 38, 6, pp. 877-883, (2008)

← 1 2 3 →