Control method and equipment for charging ready-mixed concrete a

Details Control method and equipment for charging ready-mixed concrete a Control method and equipment for charging ready-mixed concrete a

1974-07-08

1977-02-15

Poer, J.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 90, 106 97, C04B 702

Patent

active

040080935

ABSTRACT:
A control method for charging ready-mixed concrete additives batchwise which aims at keeping the slump of ready-mixed concrete within a certain range and making longer transportation by truck mixer possible without degrading the quality, where the slump of ready-mixed concrete is detected electrically as a change in the mixing torque so that, when this detected value reaches a value set beforehand, a motor receives a control instruction to charge additives for adjusting slump into the ready-mixed concrete and so that the operating time of the motor for charging additives and the interval until control operation is reset may be adjusted with a timer.

REFERENCES:
patent: 3788868 (1974-01-01), Kitsuda et al.

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