Chloride Diffusivity in Hardened Cement Paste from Microscale Analyses and Accounting for Binding Effects

Published

August 5, 2016

Author(s)

Pietro Carrara, Laura De Lorenzis, Dale P. Bentz

Abstract

We study the diffusion of chloride ions in hardened cement paste (HCP) under steady-state conditions and accounting for the highly heterogenous nature of the material. The HCP microstructures are obtained through segmentation of X-ray images of real samples as well as from simulations using the cement hydration model CEMHYD3D. Moreover, the physical and chemical interactions between chloride ions and HCP phases (binding), along with their effects on the diffusive process, are explicitly taken into account. The homogenized diffusivity of the HCP is then derived through a least squares homogenization technique. Comparisons between numerical results and experimental data from the literature are presented.

Citation

Modeling and Simulation in Materials Science and Engineering

Volume

24

Pub Type

Journals

Download Paper

https://doi.org/10.1088/0965-0393/24/6/065009

Local Download

Keywords

Chloride diffusing and binding, Microscale analyses, Numerical analysis, Segmentation of real microstructures, Simulated microstructures

Citation

Carrara, P. , De Lorenzis, L. and Bentz, D. (2016), Chloride Diffusivity in Hardened Cement Paste from Microscale Analyses and Accounting for Binding Effects, Modeling and Simulation in Materials Science and Engineering, [online], https://doi.org/10.1088/0965-0393/24/6/065009, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=919867 (Accessed April 19, 2024)