Effect of real fire and cooling systems on concrete properties

The impact of real fire and cooled in different environments (air and water) on ordinary strength concrete enclosing marble mining waste as coarse aggregate is discussed. The compressive strength was investigated. The experimental results reveal that, the use of different cooling regimes had significant effect on the property of concrete mixes. Thermal shock caused by the rapid cooling (immediately immersed in water after fire) showed more loss in compressive strength as compared to that of air cooling. From the experimental results it was observed that, at various temperature and cooling regimes the concrete made with marble aggregate exhibited improved performance as related to control mix. The siliceous aggregate undergo phase transformations after 573 degrees C but the marble aggregate are stable up to 600 degrees C. The type of cooling affects the properties of the concrete it was found from the results of this study.