Mathematical models for prediction of some mechanical properties of concrete exposed to burning

الملخص EN

In this study, some mechanical properties of high strength concrete under the effect of fire flame exposure is presented.

The concrete specimens were subjected to fire flame temperatures ranging from ( 20-850 °C) at different ages of 30 , 60 and 90 days.

Three temperature levels of 400°C , 600°C and 850°C were chosen of exposure duration of 2.0 hours.

After burning, the concrete specimens were quenched in a water tank to provide the maximum shock due to sudden cooling.

The test results showed that the density, compressive strength, tensile and flexural strength decreases when the fire flame temperatures were increased mathematical models were proposed to predict the compressive strength, splitting tensile strength and flexural strength of concrete after exposure to fire flame.

These models made by statistical program called (DATA FIT 9.0.59, 2009).