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Volume :25 Issue : 1 1998      Add To Cart                                                                    Download

Compressive strength of concrete made with silica fume at elevated temperatures

Auther : MOHAMAD J. TERRO AND JIHAD S. SAWAN

 Civil Engineering Department, Kuwait University, P.O. Box 5969, Safat 13060, Kuwait

 ABSTRACT

This paper deals with the effect of silica fume (SF) replacement on the compressive strength of Portland cement concrete made with siliceous aggregates at elevated temperatures (up to 800) To achieve this objective the compressive strength was measured at different SF contents (0% to 25%) temperatures as well as curing ages (up to 90 days) The samples were under 95% RH at room temperatures (20-22°C), heated in the oven to the desired temperature allowed to cool to ambient temperatures and then tested for their residual compressive strength. The results of this study showed that : The compressive strength of silica fume concrete decreases with increasing temperatures down to 20% of its original value around 800C ,Curing age (up to 90 curing days) hardly affects SFC behaviour. The compressive of SFC increases with the content of SF up to 250°C, remains constant at 500-600°C tends to decrease around 800°C.

Validation with trends in earlier work compares favorably with the results of this study.

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