再生细骨料混凝土的抗压强度试验

Test on Compressive Strength of Recycled Fine Aggregate Concrete

为研究再生细骨料和水灰比两种因素对混凝土抗压强度的影响,考虑再生细骨料掺入量0,25%,50%,75%和100%五个水平,水灰比0.43,0.49和0.55三个水平。试验结果表明,水灰比一定时,当再生细骨料掺入量约30%,再生混凝土抗压强度出现分界点;结合方差分析,得出水灰比及细骨料掺入量对再生混凝土抗压强度均有显著影响,从F值的大小次序来看,细骨料掺入量影响大于水灰比的影响。

In order to study two factors on Recycled Fine Aggregate(RFA) of compressive strength on recycled concrete,five levels of RFA incorporation,namely 0,25%,50%,75% and 100%,and three levels of water-cement ratio,namely 0.43,0.49 and 0.55,were considered to affect the compressive strength of recycled concrete.The test results show that when the recycled fine aggregate is about 30%,the compressive strength of recycled concrete shows a cut-off point while the watercement ratio is constant Through the analysis of variance,it is concluded that the water-cement ratio and the mixed amount of fine aggregate have a significant effect on the compressive strength of recycled concrete.From the order of F value,the influence of fine aggregate content is greater than that of water-cement ratio.