Effect of adding Na2SO4-MgSO4 solution on compressive strength of self-compacting concrete subjected to extreme conditions

摘要

Concrete is an extremely useful material for construction all over the world. However, it is a porous material that may be corrupted if it becomes exposed to corrosion, abrasion, and harsh weather conditions. In this study, materials were exposed to high temperature and humidity cycling with special fluorescence lamps ultraviolet (UV) to simulate sunlight. In this study, it was investigated the joint effect of SO4 attack and ultraviolet (UV) radiation on concrete. In the series produced with the water/binder ratio of 0.40, wastes with high MgO content wastes (natural magnesia waste, sintered magnesia waste, chromite waste (dunite), and tincal waste generated by boron production) were replaced with cement weight of 2%, 4%, and 10% in self-compacting concrete with fly ash. As a resu it has been observed that materials with high MgO content increase workability and durability. On the samples exposed to sulfate damage, it was observed that UV radiations have a rehabilitation effect, which means UV radiation affected only the surface of the samples and caused a significant mass loss ratio.