水泥细度对混凝土强度与干燥收缩的影响

试验研究了水泥细度对混凝土28 d抗压强度与干燥收缩的影响。结果表明,其他条件一定时,水泥细度在297~400 m2/kg范围内,随水泥比表面积增加混凝土28d抗压强度及干缩呈增大趋势,但当水泥比表面积增加至450 m2/kg时,混凝土28 d强度发展受到影响,干缩反而减小;用同一细度水泥配制的混凝土,在同龄期内其干缩随着水灰比的增大而增大,水灰比对混凝土干缩的影响程度大于水泥细度。

Effects of cement fineness on strength and drying shrinkage of concrete

The effects of fineness of cement on 28 d compressive strength and the drying shrinkage of concrete were investigated.When others conditions were the same,the results show that the 28 d compressive strength and drying shrinkage of concrete increased with cement fineness increasing from 297~400 m2/kg,but the development of compressive strength affected and drying shrinkage of cement fineness of the 450 m2/kg were less.Prepared the concrete with the same fineness of cement,the drying shrinkage of concrete inc...