Thermal loading and fire engineering paper
Chowdhury, SH 2014, 'Effect of elevated temperature on mechanical properties of high strength concrete', in ST Smith (ed.), 23rd Australasian Conference on the Mechanics of Structures and Materials (ACMSM23), vol. II, Byron Bay, NSW, 9-12 December, Southern Cross University, Lismore, NSW, pp. 1077-1082. ISBN: 9780994152008.
High strength concrete (HSC) is a material often used in the construction of high rise buildings. In case of unexpected fire, building elements such as columns, slabs and walls will be subjected to extreme temperatures. In order to assess the performance of high-rise concrete members to such exposure, it is important to understand the changes in the concrete properties due to extreme temperature. This paper presents an experimental study undertaken to quantify the effect of elevated temperatures of 60, 75, 100, 200, 400 and 600°C with various exposure durations of 4, 8, 12, 72 hours and one month on HSC cylinders. HSC cylinders made of two strengths, namely 80 and 100 MPa are used. For comparing their performance with normal strength concrete, cylinders made with 40 MPa concrete are also investigated. Residual tensile and compressive strengths of concrete as well as weight loss values after high temperature exposures were determined. The detrimental effects of using silica fume for higher strength concrete mixtures are exhibited by the test results.