Study on Frost Resistance and Damage Model of Steel Fiber Reinforced Concrete
Concrete specimens with 0％and 1.5％steel fiber content and C30 and C40 concrete strength grade were selected for freeze thaw test and compressive strength test to study the change law of mass loss rate and compressive strength attenuation law.Three different functional models were established using the compressive strength data as damage variables.The results show that after 200 freezing thawing cy-cles,the mass loss rate of SFRC specimens decreases by 0.69％and 1.09％,and the compressive strength loss rate decreases by 3.9％and 4.0％compared with plain concrete specimens,indicating that the addition of steel fiber reduces the strength attenuation and freezing-thawing damage of concrete.The correlation co-efficients of the damage model fitted by the three functions were compared.The damage model fitted by the binomial function had the highest accuracy,and the correlation coefficients were all over 0.95.
steel fiberfreezing and thawingmechanical propertiesdamage model
万方数据
维普
