INFLUENCE OF VIBRATION ON FRESH CONCRETE FLOW VELOCITY

Abstract

 Various ideas have been proposed on the mechanism of flow of fresh concrete by vibration compaction, but unclear points still remain. Therefore, the objective of this research is to investigate the influence of vibration compaction on the flow behavior of fresh concrete. First, the flow velocity of fresh concrete under vibration compaction was formulated, and the effect of vibration compaction on fresh concrete was grasped by the experimental results. As a result, it was found that the apparent yield stress of fresh concrete decreased with vibration compaction, and the flow velocity of fresh concrete increased. In addition, the apparent yield stress of fresh concrete under vibration compaction was considered to be determined by the flow resistance of gravel, the blocking of gravel, and the acceleration of vibration waves.