Volume :

6

Issue :

1

Abstract :

This research includes an experimental investigation on the effect of elevated temperature on compressive and tensile strength of concrete with admixture. In this experiment, compressive and tensile strength are measured for normal concrete and concrete with plasticizer admixture (POZZOLITH CRP4) in the temperature range (25-600) °C. Some other properties like failure type and color of concrete are also observed at the level of each temperature. The effect of plasticizer admixture on concrete is also investigated. Test results show that the compressive and tensile strength is increased due to use of admixture but there is a reduction in the compressive and tensile strength of concrete with or without admixture for each temperature and the decrease was very limited at temperature up to (200°C) but was clear at (400,600) °C. The tested data is utilized to develop simplified relationship between temperature and strength of concrete within the limiting range (200-600) °C for the concrete with and without admixture.