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

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