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Commercial concrete batch plant managers need to confirm the input mix, carefully re test the input of all data, the test personnel, the operator after the confirmation of the signature for the record, before the production. The production should be taken as the input mixtures ratio strictly, and if there is no written order of laboratory tester, it is prohibited to increase or decrease raw materials, additive and water volume optionally. The mixing time is determined by the concrete condition, and it is forbidden to increase or decrease the time.
In the production of commercial concrete batching plant, operators observe whether the measurement is accurate, and timely adjust it if exceeds error. When unloading, the measurement error should be in minimum range. If the measuring system has abnormal situation, operators must report promptly. The error of cement, admixtures and water must not exceed ± 1%, and if the volume of cement and admixtures are not enough, operators should promptly check whether the pipe if blocked, and immediately eliminate it. The error of aggregate materials can not exceed ± 2%, timely find out why the error exceeds, and change and record it manually.
After the commercial concrete batching plant finishes work for two hours, clean the contact parts with concrete of host mixing machine. Clean the concrete mixer suddenly after accumulated for a period of time is prohibited.
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