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混凝土实验室配合比为1∶2.28∶4.47,水灰比W/C=0.63,每m 3 混凝土中水泥用量C=285kg。现场实测砂含水率为3%,石子含水率为1%。求:(1)施工配合比;(2)若采用250公升搅拌机,求每拌混凝土各种材料用量(其中装料容积与出料容积比取1∶0.65)。
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