Understanding the interacted mechanism between carbonation and chloride aerosol attack in ordinary Portland cement concrete

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Jun Liu
  • Xiaochi Chen
  • Feng Xing
  • Ningxu Han
  • Yijian He
  • Yueshan Ma

Detail(s)

Original languageEnglish
Pages (from-to)217-225
Journal / PublicationCement and Concrete Research
Volume95
Online published10 Mar 2017
Publication statusPublished - May 2017

Abstract

An experimental study is carried out with the aim to understand the interacted mechanism between carbonation and chloride aerosol attack in ordinary Portland cement (OPC) concrete. Effects of carbonation on the chloride profile, the chloride binding capacity and the chloride diffusion coefficient are evaluated. Besides, effect of chloride aerosol attack on the carbonation rate is investigated. Concrete specimens with three water-to-cement ratios (0.38, 0.47 and 0.53) are fabricated in this work. Tested results demonstrate that carbonation remarkably affects the chloride profile, reduces the chloride binding capacity, and also accelerates the rate of chloride ion diffusion of concrete. Besides, the presence of chloride aerosol can lead to lower the carbonation depth and increase the pH value of carbonated concrete. Microscopic properties such as morphology, porosity, and pore size distribution for the contaminated concretes are explored by scanning electron microscope and mercury intrusion porosimetry, which provide strong evidence to these research findings.

Research Area(s)

  • Carbonation, Chloride aerosol attack, Concrete, Microstructure, Water-to-cement ratio

Citation Format(s)

Understanding the interacted mechanism between carbonation and chloride aerosol attack in ordinary Portland cement concrete. / Liu, Jun; Qiu, Qiwen; Chen, Xiaochi; Xing, Feng; Han, Ningxu; He, Yijian; Ma, Yueshan.

In: Cement and Concrete Research, Vol. 95, 05.2017, p. 217-225.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review