Statistical damage constitutive model of cement and asphalt mortar

In order to investigate the constitutive relationship for cement and asphalt mortar (CA mortar) under different strain rates, a statistical damage constitutive model considering the strain rate effect of CA mortar was established by using the method of statistical damage mechanics. In addition, the variation of damage properties of CA mortar with strain rate was discussed. The research results show that correlation coefficients between fitting results based on the constitutive model and experimental ones are all above 0.9781, and the constitutive model can effectively reflect the transformation of toughness to brittleness of CA mortar with the increase of strain rate. A great strain rate will result in a small damage rate of CA mortar before the peak damage rate and a big damage rate after the peak damage rate.