Experimental Study on Gap-Graded Concrete Mixing Uniformity

Abstract:

Combining with the concrete mixing process of twin-shaft mixer, this paper studied the gap-graded concrete mixing uniformity variation under different time. The study found that: under different mixing time, the relative error of coarse aggregate weight in per unit volume decreases, the compressive strength of concrete specimens change from increase to decrease, and they respectively reach the minimum and maximum at 40s, according to this, we get to optimum stirring time is 30~40s; Torque can reflect the condition of concrete mixing to a certain extent, but when the torque becomes stable, it does not stand for the uniformity of concrete mixing, keep stirring about 8s, the concrete mixing will be uniform completely.

• Periodical: Advanced Materials Research (Volume 857)
• Pages: 42-50
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.857.42
• Online since: December 2013
• Authors: Hai Peng Gao, Bo Tian, Zi Yi Hou
• Keywords: Cement Concrete, Gap-Graded, Road Engineering, Uniformity

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DOI: 10.1680/macr.1973.25.84.169