以三种不同含粉量的碎石进行试验,从混凝土质量、成本两个维度分析不同含粉量碎石对混凝土28天抗压强度和对单方材料成本的影响。结果表明,在成本一致的条件下,本文所指的“好”与“差”两种碎石配制的混凝土28天抗压强度相差在5.9~12.1MPa间,而要达到相同的强度,用“好”与“差”两种碎石配制的混凝土成本相差在27.85~50.00元间。 Three kinds of gravel with different content of powder were tested. From the two dimensions of concrete quality and cost, the influence of different content of gravel on the compressive strength of concrete for 28 days and the unilateral material cost were analyzed. The results show that under the condition of consistent cost, the compressive strengths of concrete prepared by two kinds of gravel, which are referred to as “good” and “bad” in this paper, differ from 5.9 to 12.1 MPa, and the same Strength, with “good” and “poor” two kinds of gravel prepared concrete cost difference between 27.85 ~ 50.00 yuan.