水灰比对再生混凝土强度影响的试验研究

Study on effect of compressive strength of recycled aggregate concrete with water cement ratio

研究了水灰比对普通与再生骨料混凝土强度的影响。结果表明,混凝土强度与水灰比密切相关。当水灰比大于0 57时,与普通混凝土相类似,再生混凝土的抗压强度随着水灰比的增大而减小;当水灰比小于0 57时,再生混凝土的抗压强度随着水灰比的增大而增大。基准混凝土和再生混凝土超声声速和回弹值随水灰比的变化规律与它们抗压强度值的变化规律基本一致。

Water cement ratio on effects of compressive strength of natural and recycled aggregate concrete were examined.The results show that compressive strength of concrete concerns water cement ratio very nearly.When water cement ratio is above 0.57,compressive strength of recycled aggregate concrete decreases with water cement ratio increased.This rule is similar to one of natural concrete.However,when water cement ratio is below 0.57,compressive strength of recycled aggregate concrete increases with water cement ratio increased.The rule which the velocity of ultrasonic sound and rebound number of natural and recycled aggregate concrete change with water cement ratio is the same as one of compressive strength of both concrete respectively.