SLUMP AND SLUMP FLOW VALUE ESTIMATION METHOD AND FACILITY

摘要

To solve the problem in which conventionally, slump and a slump flow value are estimated by factors that indirectly affect the liquidity of ready-mixed concrete, so this estimated value deviates from an actually measured value and credibility is lacking.SOLUTION: The present invention includes: putting ready-mixed concrete after kneading and before shipping into a measuring container with a hollow truncated cone with open upper and lower surfaces that is disposed so that its upper surface has a large diameter and lower surface has a small diameter, measuring the discharge time and discharge speed of the ready-mixed concrete discharged from the measuring container, measuring and calculating continuously within the discharge time an average shear strain at multiple peripheral places in the center predetermined diameter part of a stacked top of the ready-mixed concrete, an average shear strain of multiple peripheral places in a larger diameter part than the center predetermined diameter part, and a maximum volume fluctuation amount that is the maximum value of the discharge volume within the discharge time of the ready-mixed concrete, and calculating slump and a slump flow estimated value.SELECTED DRAWING: Figure 5