摘要
为研究碳化再生细骨料对氯离子侵蚀下再生混凝土(RAC)与钢筋粘结滑移性能,采用加速通电锈蚀法,在再生粗骨料取代率70%的条件下,分别以经碳化后的再生细骨料取代率(0%、 20%、 30%、 40%)及钢筋锈蚀率(0%、 1%、 2%、 4%)为主要参数,进行28组试件的拉拔试验,获得不同再生细骨料掺量下再生混凝土与不同锈蚀程度钢筋间的荷载-滑移曲线,并与掺入未碳化的再生细骨料情况作对比.基于试验结果,分析经碳化后的再生细骨料取代率、钢筋锈蚀率对钢筋-再生混凝土间峰值拉拔力、粘结刚度、粘结滑移曲线的影响.
To study the effect of carbonized recycled fine aggregate on bond behavior between corroded rebar and recycled aggregate concrete, 28 sets of pull-out tests were performed on recycled aggregate concrete with recycled coarse aggregate replacement percentage of 70%. Four carbonized recycled fine aggregate replacement percentages(i.e., 0%, 20%, 30% and 40%) and four corrosion rates(i.e., 0%, 1%, 2% and 4%) were considered in this study. Based on these experimental results, the effects of carbonized recycled fine aggregate replacement percentages and corrosion rates on peak pull-out strength, bond stiffness and bond-slip curve were analyzed.
引文
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