Utilization of seawater in mixing and curing of concrete incorporating zeolitic tuff as a filler

This paper is part of a study investigating the performance of concrete that is produced by using unconventional water resources (such as seawater) instead of freshwater. Due to the scarcity of water resources in different countries around the world, it is of significant importance to reduce the consumption of fresh water in the construction industry as well as other sectors. This study aims to investigate the effect of using seawater in the production of concrete containing 10% of locally quarried zeolitic tuff as a partial replacement of silica sand on its compressive strength at 7, 28, and 90days of curing. The results show that the negative effect of seawater on the compressive strength of concrete can be alleviated significantly at different ages of curing by using zeolitic tuff as a partial replacement of sand. The findings of this study contribute to the improvement of the sustainability of concrete through using unconventional water resources in the production of concrete.