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为实现铸造废砂的综合资源化再利用,考虑将铸造废砂用于水泥稳定基层替代天然细集料。通过抗压强度、抗拉强度以及回弹模量等大量室内实验,与掺量为0的基准混合料相比,分析了5%、10%、15%、20%不同掺量对混合料力学性能的影响。此外,基于冻融循环实验研究铸造废砂对水泥稳定基层抗冻性的影响。结果表明:不超过15%的废砂替代天然细集料用于水稳基层均满足路用性能。
In order to achieve the comprehensive recycling of foundry waste sand, it is considered to use foundry waste sand as a substitute for natural fine aggregate for cement stabilized base. Through a large number of laboratory experiments, such as compressive strength, tensile strength and modulus of elasticity, compared with the standard mixture with the content of 0, the effects of different dosages of 5%, 10%, 15% and 20% The impact of performance. In addition, based on the freeze-thaw cycle experiment, the effect of foundry sand on frost resistance of cement-stabilized base course was studied. The results show that not more than 15% of the waste sand replaces the natural fine aggregate for the water-stable base to meet the road performance.