Effect of Elevated Temperature on the Properties of High-Strength Concrete containing Cement Supplementary Materials

High-strength concrete is a material often used in the construction of high rise buildings. In the case of unexpected fire, the building concrete elements such as columns, slab and walls will be subjected to extreme temperatures. In order to assess the performance of high-rise reinforced concrete members it is important to understand the changes in the concrete properties due to extreme temperature exposure. Since the high-strength concrete produced may contain various binder materials in addition to cement, it is also becoming necessary to investigate the influence of the binder material type on the concrete properties under elevated temperature exposure. This paper summarizes and discusses the degradation of the strengths and stiffness of high-strength concrete in relation to the binder material type. The results showed that the binder material type has a significant influence on the performance of highstrength concrete particularly at temperatures below 800C. The influence of the binder material type is significantly decreased at temperature of 1000C. The strengths and stiffness of high-strength concrete are reduced with the increase in temperature without any threshold temperature level. The strengths are susceptible to the elevated temperatures compared to stiffness of concrete. High-strength concrete containing silica fume seems to be more sensitive to elevated temperature.