Journal Published Online: 01 August 2012
Volume 40, Issue 5

Chloride Binding Capacity of Cement Paste Containing Layered Double Hydroxide (LDH)

CODEN: JTEVAB

Abstract

The chloride binding capacity of concrete can affect the rate of chloride ingress, which ultimately determines the chloride-ion resistance. A layered double hydroxide (LDH) can absorb the chloride ions in cement paste and delay chloride ingress in the structure. A method for evaluating the chloride binding capacity of cement paste was used in the experiment reported herein. We compare Mg-Al LDH under different treatments (including CO32− series and NO3 series) in order to determine the chloride binding capacity of the LDH. The binding mechanism is explored in this article. The experimental results indicate that LDH processes have a remarkable chloride ion binding capacity. The addition of LDH can improve the chloride binding capacity of cement paste significantly. Cement paste containing roasted LDH has a better chloride binding capacity than that containing unroasted LDH or rehydrated LDH. Based on the comparison of LDHs with different anions, the chloride binding capacity of NO3 series LDH appears to be more powerful than that of CO32− series LDH.

Author Information

Zhonghe, Shui
School of Materials Science and Engineering, Wuhan Univ. of Technology, Wuhan, CN State Key Lab of Silicate Materials for Architectures, Wuhan, CN
Juntao, Ma
School of Materials Science and Engineering, Wuhan Univ. of Technology, Wuhan, CN State Key Lab of Silicate Materials for Architectures, Wuhan, CN
Wei, Chen
School of Materials Science and Engineering, Wuhan Univ. of Technology, Wuhan, CN State Key Lab of Silicate Materials for Architectures, Wuhan, CN
Xiaoxing, Chen
School of Materials Science and Engineering, Wuhan Univ. of Technology, Wuhan, CN State Key Lab of Silicate Materials for Architectures, Wuhan, CN
Pages: 5
Price: $25.00
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Details
Stock #: JTE20120054
ISSN: 0090-3973
DOI: 10.1520/JTE20120054