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【摘 要】
：
Returned concrete is the residual amount of fresh concrete that is not placed at the job site and returns to the ready-mix plant in the truck mixer.Accordin
【机 构】
：
R & D Department, Mapei S.p.A., Milan 20158, Italy
【出 处】
：
The 14th International Congress on the Chemistry of Cement (
【发表日期】
：
2015年期
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