Effects of High Temperature on the Properties of Concrete

Abstract

Concrete are very much effective in compression and shows less capable to carry tensile load. But this characteristic of concrete shows vulnerable when subjected to heat. Concrete are very much strong at room temperature i.e. 25 0C, but represents a lower strength when exposed to heat. In this study concrete are tested in several temperatures by the furnace. Concrete are exposed to 100 0C, 300 0C, 600 0C and 1000 0C and then tested the property of it. To complete this study about 48 cylinders were prepared by both stone aggregate and brick aggregate. The mixing ratio and w/c ratio of these concrete are kept standard with similar to local construction practice i.e. 1:1.5:3 and 0.45 respectively. The compressive strength of concrete in different heat reduce gradually with respect to increase of temperature but in exception of 100 0C. The unit weight of these concrete reduced remarkably after exposed to heat because of loss of water from the concrete. The capacity of tensile strength is low with compare to normal temperature.