Effect of Water-cement Ratio on Modulus of Rupture and Tensile Strain Capacity of Concrete

Abstract

This research was aimed to study the modulus of elasticity and tensile strain capacity of concrete. The parameter considered was water-cement ratio. The water-cement ratios were 0.35, 0.55, 0.65 and 0.75.Tensile strain capacity was investigated using flexural test method. The test results showed that the compressive strength of concrete is between 63.40 -497.45 ksc. The modulus of rupture of concrete is between 23.52 – 55.47 ksc and the tensile strain capacity is between 155 – 216 micron. The flexural strength is about 11 – 39 % of compressive strength. The investigation showed that the effect of water-cement ratio in the tested ranges was significant. The tensile strain capacity and modulus of rupture decreased with the increase of water-cement ratio.