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Relationship between the rheology of unvibrated fresh concrete and its flow under vibration in a vertical pipe apparatus

机译:立管设备中未振动的新鲜混凝土的流变特性与振动下的流动之间的关系

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摘要

Ten different concretes have been tested under vibration using a vertical pipe apparatus. The fluidity of the vibrated concrete, determined from the rate of efflux from the pipe, is controlled by the peak velocity of the vibration and influenced by the rheology of the unvibrated concrete. Fluidity is proportional to peak vibrational velocity up to a critical level, above which it increases no further. The critical velocity is proportional to the yield value of the unvibrated concrete, and the peak fluidity is inversely proportional to the plastic viscosity of the unvibrated concrete.
机译:使用立式管道设备在振动下测试了十种不同的混凝土。振动混凝土的流动性由管道的外排率决定,它由振动的峰值速度控制,并受未振动混凝土的流变性的影响。流动性与峰值振动速度成正比,直至达到临界水平,在此之上它不再增加。临界速度与未振动混凝土的屈服值成正比,而峰值流动性与未振动混凝土的塑性粘度成反比。

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