导读：黎明机械专家从机制砂粗糙度、压碎值和岩性的角度，研究了影响机制砂混凝土抗压、抗折强度及耐磨性的敏感性因素，比较了石灰岩机制砂与河砂混凝土路用性能的差异，并简要分析了粉煤灰对机制砂混......免费在线咨询
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