Carbonation and corrosion of rebars in salt contaminated OPC/PFA concretes

Omar Saeed Baghabra Al-Amoudi; Rasheeduzzafar; Mohammed Maslehuddin

doi:10.1016/0008-8846(91)90029-H

Carbonation and corrosion of rebars in salt contaminated OPC/PFA concretes

Omar Saeed Baghabra Al-Amoudi^*
, Rasheeduzzafar
, Mohammed Maslehuddin

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

27 Scopus citations

Abstract

This paper reports results of an investigation carried out to study the effect of salt inclusion in the OPC/PFA concrete on alkalinity, carbonation and rebar corrosion. Chloride concentrations ranging from 0 to 2.7% by weight of cement were added to the concrete mixes to simulate chloride induction through constituent materials in the conditions of the Arabian Gulf. Reinforced concrete specimens were exposed at an exposure site along the Arabian Gulf. Results indicate an insignificant reduction in alkalinity in both OPC/PFA concretes due to chloride contamination. The corrosion of rebars was found to be influenced more by the chloride concentrations in the concrete, rather than by the presence of fly ash. The depth of carbonation was however, higher in fly ash concrete specimens compared to OPC concretes both in chloride free and chloride contaminated concretes.

Original language	English
Pages (from-to)	38-50
Number of pages	13
Journal	Cement and Concrete Research
Volume	21
Issue number	1
DOIs	https://doi.org/10.1016/0008-8846(91)90029-H
State	Published - Jan 1991

ASJC Scopus subject areas

Building and Construction
General Materials Science

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title = "Carbonation and corrosion of rebars in salt contaminated OPC/PFA concretes",

abstract = "This paper reports results of an investigation carried out to study the effect of salt inclusion in the OPC/PFA concrete on alkalinity, carbonation and rebar corrosion. Chloride concentrations ranging from 0 to 2.7\% by weight of cement were added to the concrete mixes to simulate chloride induction through constituent materials in the conditions of the Arabian Gulf. Reinforced concrete specimens were exposed at an exposure site along the Arabian Gulf. Results indicate an insignificant reduction in alkalinity in both OPC/PFA concretes due to chloride contamination. The corrosion of rebars was found to be influenced more by the chloride concentrations in the concrete, rather than by the presence of fly ash. The depth of carbonation was however, higher in fly ash concrete specimens compared to OPC concretes both in chloride free and chloride contaminated concretes.",

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AU - Al-Amoudi, Omar Saeed Baghabra

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PY - 1991/1

Y1 - 1991/1

N2 - This paper reports results of an investigation carried out to study the effect of salt inclusion in the OPC/PFA concrete on alkalinity, carbonation and rebar corrosion. Chloride concentrations ranging from 0 to 2.7% by weight of cement were added to the concrete mixes to simulate chloride induction through constituent materials in the conditions of the Arabian Gulf. Reinforced concrete specimens were exposed at an exposure site along the Arabian Gulf. Results indicate an insignificant reduction in alkalinity in both OPC/PFA concretes due to chloride contamination. The corrosion of rebars was found to be influenced more by the chloride concentrations in the concrete, rather than by the presence of fly ash. The depth of carbonation was however, higher in fly ash concrete specimens compared to OPC concretes both in chloride free and chloride contaminated concretes.

AB - This paper reports results of an investigation carried out to study the effect of salt inclusion in the OPC/PFA concrete on alkalinity, carbonation and rebar corrosion. Chloride concentrations ranging from 0 to 2.7% by weight of cement were added to the concrete mixes to simulate chloride induction through constituent materials in the conditions of the Arabian Gulf. Reinforced concrete specimens were exposed at an exposure site along the Arabian Gulf. Results indicate an insignificant reduction in alkalinity in both OPC/PFA concretes due to chloride contamination. The corrosion of rebars was found to be influenced more by the chloride concentrations in the concrete, rather than by the presence of fly ash. The depth of carbonation was however, higher in fly ash concrete specimens compared to OPC concretes both in chloride free and chloride contaminated concretes.

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JF - Cement and Concrete Research

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ER -

Carbonation and corrosion of rebars in salt contaminated OPC/PFA concretes

Abstract

ASJC Scopus subject areas

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