Cyclic compressive behavior of limestone and silicomanganese slag concrete subjected to sulphate attack and wetting-drying action in marine environment

Matthew Zhi Yeon Ting, Kwong Soon Wong*, Muhammad Ekhlasur Rahman, Meheron Selowarajoo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Concrete in maritime structure is vulnerable to deterioration owing to external sulphate attack, which can be exacerbated by wetting-drying action (WDA), jeopardizing its resistance to cyclic loads such as wind, wave and earthquake actions. This study aims to investigate the compressive fatigue behavior of concrete exposed to sulphate attack and WDA in marine environment. Cyclic compressive loading test was conducted on concrete after 150 days of deterioration. The effects of sulphate attack and WDA, upper stress loading level and loading frequency on fatigue life, residual strain, variation of elastic modulus and post-cyclic compressive strength were investigated. The sulphate penetration profiles, volume change and mass change of concrete during the exposure time were also measured. In addition, the performance of limestone concrete and silicomanganese (SiMn) slag concrete was compared in the study. The sulphate ion was found to penetrate concrete up to a depth of 20 mm, with a maximum content of 1.72%–2.58% near the surface. The cyclic loading test showed that degraded concrete had 38.2% higher residual displacement and 1.4% lower modulus of elasticity than normal concrete. The sulphate attack and WDA weakened the concrete, reducing its fatigue resistance. SiMn slag concrete had a lower fatigue life, larger residual displacement and greater stiffness degradation than limestone concrete.
Original languageEnglish
Article number103357
Pages (from-to)1-14
Number of pages14
JournalJournal of Building Engineering
Volume44
Early online date25 Sep 2021
DOIs
Publication statusE-pub ahead of print - 25 Sep 2021

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