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为了研究城市垃圾熔渣细骨料以及废弃混凝土粗骨料再生利用的可能性,本文着眼于城市垃圾熔渣再生混凝土的耐久性能,试验以100%再生粗骨料以及垃圾熔渣细骨料替代天然碎石和砂子制备再生混凝土.探讨了城市垃圾熔渣再生混凝土的耐久性能之一抵抗冻融循环的能力。冻融循环试验用混凝土以水灰比0.45、0.65为变动因素。试验结果表明,城市垃圾熔渣再生混凝土(简称RS混凝土)试件的冻融循环抵抗性与粗、细骨料置换率为0%的普通混凝土(简称NN混凝土)试件相比,水灰比0.45、0.65时的耐久性指数分别降低7.9%和13.3%,但都能满足评价冻融循环抵抗性的最低指标。
In order to study the possibility of city garbage slag aggregate and recycled concrete coarse aggregate recycling, this paper focuses on the durability of city garbage slag recycled concrete, the experiment with 100% recycled coarse aggregate and refuse slag fine aggregate instead Natural gravel and sand were used to prepare recycled concrete.It was discussed that one of the durability properties of municipal solid waste slag recycled concrete could resist the freeze-thaw cycle. Freeze-thaw cycle test of concrete with water-cement ratio 0.45,0.65 as a changing factor. The experimental results show that the freeze-thaw cycle resistance of city refuse slag concrete (RS concrete) is better than that of ordinary concrete (NN concrete) with coarse and fine aggregate replacement ratio of 0% At 0.45 and 0.65, the durability index decreased by 7.9% and 13.3% respectively, but all of them met the lowest index of resistance to freeze-thaw cycles.