The Effect of Seawater Curing on the Correlation between Split Tensile Strength and Modulus of Rupture in High-strength Concrete Incorporating Rice Husk Ash

This paper presents experimental and analytical methods conducted to study the effect of seawater curing on the correlation between split tensile strength and modulus of rupture (MOR) in high-strength concrete incorporating rice husk ash. Rice husk ash was added into the mix to partially replace cement content; replacement proportions were 0, 5, 10, 15, and 20%. To resemble the marine environment concrete samples were cured in seawater. The results show that the addition of rice husk ash increased the MOR and split tensile strength values, and also increased the resistance to seawater exposure. The correlation between split tensile strength and MOR had the empirical fst = 125.3%×MOR for fresh water curing, and fst = 115.8%×MOR for seawater curing.