钢纤维再生混凝土抗压强度试验研究

以钢纤维体积率、钢纤维类型、再生粗骨料处理方式以及试件尺寸作为参数,通过与钢纤维天然混凝土对比,探讨钢纤维对再生混凝土抗压性能的影响.试验结果表明:钢纤维再生混凝土抗压强度略低于钢纤维天然混凝土,钢纤维的加入可以在一定程度上提高再生混凝土的抗压强度,钢纤维再生混凝土立方体抗压强度的尺寸效应系数与钢纤维天然混凝土差别不明显.根据对试验数据的统计分析,铣削型钢纤维(MF)对天然混凝土抗压强度的影响系数为0.25,对预湿水再生混凝土抗压强度的影响系数为0.35,钢纤维对再生混凝土的增强效果优于天然混凝土.

Experimental Research on the Compressive Strength of Steel Fiber Recycled Concrete

The influence of the volume fraction for steel fiber and types of steel fiber and the pretreatment ways of recycled coarse aggregate and dimensional effect on compressive strength of steel fiber recycled concrete were explored.Results indicate that the compressive strength of steel fiber recycled concrete is slightly lower than natural steel fiber concrete.The addition of steel fiber can improve compressive strength of recycled concrete to a certain extent.The difference of the conversion coefficient of dimensional effect for compressive strength between steel fiber recycled concrete and natural steel fiber concrete is not obvious.According to the statistic analysis to the experiment data,the influence coefficient of Milling Steel Fiber(MF) to natural steel fiber concrete is 0.25,and to recycled concrete considering water absorption of recycled coarse aggregate is 0.35,the enhancement effect of steel fiber to recycled concrete surpasses natural steel fiber concrete.