| 摘要 |
PROBLEM TO BE SOLVED: To provide a device for calculating an amount of a fluidizing agent to be added which reduces a load on an operator and calculates a proper amount of the fluidizing agent to be added, and also to provide a concrete mixer truck. SOLUTION: The device for calculating the amount of the fluidizing agent has a pressure detecting means 5 detecting the driving pressure of a liquid pressure motor 1 rotating/driving the drum D of the concrete mixer truck and a processing means calculating the amount R of the fluidizing agent to be added based on the amount L of the concrete charged in the drum D, a slump value S when the concrete is charged in the drum, and the variationΔP of the driving pressure of the liquid pressure motor 1 during the transportation of the concrete when the drum D is rotated/driven at a prescribed rotational speed. COPYRIGHT: (C)2007,JPO&INPIT
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