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  • Concrete Mixing Methods and Concrete Mixers: State of the Art

    Apr 01 2001 · Typically the speed for mixing is 1.57 rad/s (15 rpm) while the transport of pre-mixed concrete uses only 0.2 rad/s (2 rpm) to 0.6 rad/s (6 rpm) [1]. In the United States most ready-mixed concrete is mixed in trucks [2] and not pre-mixed in a plant. In a tilting drum mixer