Investiegation Of Temperature Impact On Compressive Strength Of Concrete

Abstract

In this study we are going to discuss about the strength of concrete after heating. Sometime building catches fire. As a result it loses strength. So our aim is to determine the strength of concrete after heat as part of an investigation on the effect of temperature on the crushing strength of concrete, tests have been carried out using 4 in. diameter by 8 in. long specimens made with ordinary Portland cement, Sylhet sand and coarse aggregate, having various mix proportions and water/cement ratios. The crushing strength of concrete at temperatures up to 400°C was independent of the water/cement ratio used but was influenced by the aggregate/cement ratio. Concrete specimens loaded to produce normal design compressive stress during the period of heating showed less reduction in strength than specimens without imposed load. There was a further loss in the compressive strength of the specimens when cooled after heating.