摘   要：以工程常见几类典型水洗劣质砂为研究对象，分别探讨了干涸河床水洗砂、骆马湖砂（含蒙脱土泥质）、页岩及片麻岩水洗机制砂对混凝土的工作性能及力学性能的影响。结果表明，含泥量最低的骆马湖砂对减水剂的需求量最高，混凝土拌合物的流动性损失最大；水洗河砂少量的含泥量对混凝土的泌水及力学性能影响较小；两类水洗机制砂所配制的混凝土泌水率明显高于河砂，且含气量较低；片麻岩机制砂混凝土的抗压强度最低，随着混凝土强度等级的提升其泌水现象有所减轻，但是抗压强度与河砂的差距愈加显著。

 Abstract: Focusing on several typical inferior sands in engineering, the sand of washing dry river bed, the Luomahu sand and the manufactured sands of shale and gneiss were discussed on their influence on concrete, including fresh concrete performance and mechanical property. The results show that, the Luomahu sand which has the least mud content has the most demand of polycarboxylate superplasticizer, and it has the highest slump loss. The small amount of silt content of washing dry river bed sand has little effect on bleeding rate and mechanical strength of concrete. Both of the manufactured sands have higher bleeding rate and lower air content than the river sands. The concrete of gneiss manufactured sand has the lowest compressive strength, and the bleeding rate reduces and the gap of concrete compressive strength between gneiss manufactured sand and river sand become wider as the concrete grade increases.