Effect of elevated temperature on the co

الملخص

This work aims to show the effect of elevated temperature on the residual compressive strength of concrete made with available ordinary Portland cement, crushed basalt aggregate, sand and silica fume added in the form of a dry powder as a percentage of the cementations material. The two Variables of this study are temperature (20 to 900o C), and different silica fume contents (0% to 15%). The samples were cured in water tanks for 28 days prior to heating. After heating the samples in an oven to the desired temperatures, they were allowed to cool to room temperature and tested under compression. The average of the three readings obtained has been used to represent the condition of the experimental test. This study shows that the compressive strength of silica fume concrete and normal concrete decreases when exposed to high temperatures, where the silica fume concrete is more sensitive to elevated temperatures than normal concrete. The residual compressive strength ranged between (62 – 81%) of the original value at around 900o C.