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Control method and equipment for charging ready-mixed concrete additives batchwise

  • US 4,008,093 A
  • Filed: 07/08/1974
  • Issued: 02/15/1977
  • Est. Priority Date: 07/12/1973
  • Status: Expired due to Term
First Claim
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1. A control method for the batchwise charging of ready-mixed concrete, comprising the steps ofmixing the concrete until a slump change occurs in the concrete;

  • detecting the occurrence of the slump change as a function of a change in the mixing torque required for effecting said mixing;

    initiating a signal when said change in the mixing torque reaches a predetermined level; and

    utilizing said signal to initiate dispensing of slump-adjusting additives into said concrete for a timed period.

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