Equation for the Degradation of Uniaxial Compression Stress of Concrete due to Freeze-Thaw Damage

الملخص EN

To study the freeze-thaw damage characteristics of concrete, the uniaxial compressive tests of concrete under different number of freeze-thaw cycles were conducted, and the damage variable of freeze-thaw was obtained.

The test results showed that the stress was a function of strain and freeze-thaw damage variable, and it can describe the degradation of concrete strength.

Meanwhile, the equation for the stress-strain curved surface about strain and freeze-thaw damage variable was also proposed in this paper.

The derivative function of the stress-strain curved surface equation with respect to strain presented the change of elastic modulus with the increase of freeze-thaw cycle number.

Equation proposed in this paper can be used for predicting the concrete lifetime effectively in cold and large temperature difference regions.