Gyuyong Kim
Chungnam National University, Korea
Title: Proposal of prediction model on mechanical properties of concrete at elevated temperature with coarse aggregate type
Biography
Biography: Gyuyong Kim
Abstract
The coarse aggregates and loading conditions play an important role in mechanical properties of concrete at elevated temperature. Therefore, effects of loading conditions and coarse aggregate type on the mechanical properties of concrete at elevated temperature are investigated in this study. As results, light weight aggregate concrete displayed a higher residual compressive strength than normal weight aggregate concrete under thermal load condition. Normal weight aggregate concrete suffered from a large number of cracks at its interior at high temperatures, while the interior of the light weight aggregate concrete demonstrated fewer cracks because of the voids in its interior to the mitigation of thermal expansion stress. Based on the results, unlike existing model for fire resistance design of concrete, model for compressive strength at elevated temperature of concrete and thermal strain considering types of coarse aggregate and loading condition of structure was proposed in this study.