In this research, the adverse effect of various oils when the mortar including fly ash was submerged into the oils. From the experimental results, the highest length and mass changing rates were observed when the mortar was submerged into the biodiesel and in the case of relative dynamic elastic modulus, soy oil and biodiesel caused the most decreasing. Additionally, the mortar with fly ash was influenced more than ordinary Portland cement when it submerged into the oil.

In construction sites there are many cases that concrete is cured in a dry condition, without being moistured, after form have been removed. Consequently such curing condition causes cracks on concrete. In this study is to observe when applied ERCO(Emulsified Refined Cooking Oil) coating on concrete surfaces after removal of form, affects water evaporation and Shrinkage of high-strength mortar.