石墨尾矿对再生粗骨料混凝土力学性能影响的研究

Effect of graphite tailings on mechanical properties of recycled coarse aggregate concrete

研究了石墨尾矿对再生粗骨料混凝土工作性能、破坏形态及力学性能的影响。结果表明,再生粗骨料混凝土坍落度随石墨尾矿掺量的增加而降低,而且石墨尾矿再生粗骨料混凝土的破坏形态与再生粗骨料混凝土相似。同时,再生粗骨料混凝土抗压强度随着石墨尾矿掺量的增加呈现先上升后下降的趋势。当石墨尾矿替代率为20%、再生粗骨料替代率为30%时混凝土抗压强度最佳。

In this paper,the influence of graphite tailings on the workability,failure form and mechanical properties of recycled coarse aggregate concrete is studied.The results show that the slump of recycled coarse aggregate concrete decreases with the increase of the content of graphite tailings,and the failure form of recycled coarse aggregate concrete is similar to that of recycled coarse aggregate concrete.At the same time,the compressive strength of recycled coarse aggregate concrete first increases and then decreases with the increase of graphite tailings content.When the replacement rate of graphite tailings is 20%and the replacement rate of recycled coarse aggregate is 30%,the compressive strength of concrete is the best.