TY - JOUR
T1 - Meso-scale modeling of chloride diffusivity in mortar subjected to corrosion-induced cracking
AU - Qiu, Qiwen
AU - Dai, Jian Guo
N1 - Funding Information:
This research was supported by the Hong Kong Research Grants Council—Theme‐based Research Scheme (Project No.: T22‐502/18‐R), Guangdong Province R&D Plan for Key Areas (Project code: 2019B111107002), and Innovation Technology Fund (Project code: ITS/077/18FX). The experimental work was conducted in the Concrete Technology Laboratory, Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University as well as the Guangdong Province Key Laboratory of Durability for Marine Civil Engineering, School of Civil Engineering, Shenzhen University. Special thanks are addressed to Mr. Peng Dong and Mr. Zhentao Gu for their support to this study.
Funding Information:
This research was supported by the Hong Kong Research Grants Council?Theme-based Research Scheme (Project No.: T22-502/18-R), Guangdong Province R&D Plan for Key Areas (Project code: 2019B111107002), and Innovation Technology Fund (Project code: ITS/077/18FX). The experimental work was conducted in the Concrete Technology Laboratory, Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University as well as the Guangdong Province Key Laboratory of Durability for Marine Civil Engineering, School of Civil Engineering, Shenzhen University. Special thanks are addressed to Mr. Peng Dong and Mr. Zhentao Gu for their support to this study.
Publisher Copyright:
© 2021 Computer-Aided Civil and Infrastructure Engineering
PY - 2021/5
Y1 - 2021/5
N2 - This paper presents a methodology for numerically simulating the chloride diffusivity in mortar subjected to corrosion-induced cracking with the aid of X-ray microcomputed tomography (X-ray µCT). In the research, the mortar sample with embedded steel rod was subjected to accelerated corrosion and then scanned by X-ray µCT at consecutive corrosion periods of 0, 1,000, and 2,000 minutes. Upon the scanned CT images, a meso-scale model consisting of multiple material phases with their intrinsic structures was built up and implemented into a finite element method for diffusion simulation. In the numerical simulation, the effects of multiple phases (void, crack, aggregate, rust, and interfacial transition zone between cement and aggregate) on the chloride diffusion of mortar are studied. Since the X-ray µCT facilitates accurate local material information in time-dependent and in situ manner, the diffusivity of mortar under different corrosion time and its spatial distribution characteristics (e.g., at different locations from the mortar surface) can be evaluated.
AB - This paper presents a methodology for numerically simulating the chloride diffusivity in mortar subjected to corrosion-induced cracking with the aid of X-ray microcomputed tomography (X-ray µCT). In the research, the mortar sample with embedded steel rod was subjected to accelerated corrosion and then scanned by X-ray µCT at consecutive corrosion periods of 0, 1,000, and 2,000 minutes. Upon the scanned CT images, a meso-scale model consisting of multiple material phases with their intrinsic structures was built up and implemented into a finite element method for diffusion simulation. In the numerical simulation, the effects of multiple phases (void, crack, aggregate, rust, and interfacial transition zone between cement and aggregate) on the chloride diffusion of mortar are studied. Since the X-ray µCT facilitates accurate local material information in time-dependent and in situ manner, the diffusivity of mortar under different corrosion time and its spatial distribution characteristics (e.g., at different locations from the mortar surface) can be evaluated.
UR - http://www.scopus.com/inward/record.url?scp=85104659474&partnerID=8YFLogxK
U2 - 10.1111/mice.12657
DO - 10.1111/mice.12657
M3 - Journal article
AN - SCOPUS:85104659474
VL - 36
SP - 602
EP - 619
JO - Computer-Aided Civil and Infrastructure Engineering
JF - Computer-Aided Civil and Infrastructure Engineering
SN - 1093-9687
IS - 5
ER -