主要研究了机制砂的品质对混凝土拌合物的状态和力学性能的影响。机制砂的品质主要包括细度模数、含粉量、亚甲蓝值等指标。研究结果表明:含粉量高、亚甲蓝值大的机制砂使得低强度等级的混凝土外加剂的掺量增加,坍落度损失增大,但混凝土黏聚性优良,力学性能有所提高。而含粉量低、亚甲蓝值小的机制砂宜配制高强度混凝土,当用于配制低强度混凝土时,混凝土黏聚性不良。 Mainly studied the quality of the mechanism of sand on the concrete mixture state and mechanical properties. The quality of the mechanism of sand, including fineness modulus, powder content, methylene blue value and other indicators. The results show that: the high content of powder, methylene blue value of the sand makes the low strength grade concrete admixture content increases, the slump loss increases, but the excellent cohesion of concrete, mechanical properties increased. The low content of powder, methylene blue small sand should be prepared high strength concrete, when used in the preparation of low-strength concrete, concrete cohesion poor.