龄期和试件尺寸对钢纤维混凝土抗压强度的影响

Effects of Age and Specimen Size on the Compressive Strength of Steel Fiber Reinforced Concrete

测定了不同尺寸、不同钢纤维体积率混凝土试件的各龄期折后抗压强度,并按照定义的抗压强度尺寸效应计算方法,求出了不同尺寸试件之间的抗压强度尺寸效应值。结果表明,相同龄期内,钢纤维混凝土的抗压强度较普通混凝土有所提高;钢纤维混凝土的抗压强度受到龄期、钢纤维体积率和试件尺寸的影响;不同尺寸混凝土试件之间存在一定的抗压强度尺寸效应值。

The compressive strength experiments after compression in each age for different dimension and different steel fiber volume rate of steel fiber reinforced concrete are determined.According to the definition for dimension calculation method of compressive strength,the size effect values of compressive strength for different specimens are obtained.The results show that in the same age,compressive strength of steel fiber reinforced concrete is better than the normal concrete.The compressive strength of steel fiber reinforced concrete is affected by age,volume rate of steel fiber and specimen size.The concrete samples with different dimension exist certain size effect values of compressive strength.