How to ensure the concrete quality produced by cement mixing plant equipment

How to ensure the concrete quality produced by cement mixing plant equipment

1、 Production dispatchers, mixer operators and quality inspectors shall accurately fill in various events of this shift every day. 2、 Before the production of each shift, the operator shall check the weighing system and conduct dynamic inspection after idling for 10 seconds. If any abnormality is found, it shall be eliminated in time to ensure the normal production of concrete. 3、 The laboratory shall issue the mix proportion notice according to the production task list, and issue the opening appraisal and construction mix proportion according to the water content of sand and stone on that day. The mixer operator shall strictly implement the mix proportion and shall not change it without permission. 4、 The quality inspector of each shift shall check the workability of the first batch of concrete mixture together with the mixer operator to ensure the stability of the construction mix proportion of the shift. 5、 The water content of sand and gravel shall be sampled and measured at least twice in each shift of the laboratory, and the opening appraisal and construction mix proportion shall be adjusted in time. When the water content changes significantly, the measurement times shall be increased. 6、 In case of difference between production sand and trial sand, the construction mix proportion shall be adjusted in time. 7、 The quality inspector shall obtain the consent of the technical director when adjusting the construction mix proportion, and make adjustment records. 8、 The mixing time of concrete shall be in strict accordance with the process requirements and the instructions of mixer, and the mixing time of high-strength concrete shall be extended. Nine. When the concrete mixing meets the requirements, dispatch and dispatch the "ready mixed concrete transport sheet" to the driver. During the loading process, the driver must carry out the relevant regulations according to the company's regulations and ensure safety. Ten, the concrete must inspect the workability of the concrete by car before leaving the factory. The slump of the delivered concrete shall be adjusted according to the actual situation to meet the construction requirements. The sampling frequency of sufficient concrete shall be taken every 100 according to each production order, and the same production order shall exceed 1000 200 once. 12、 Concrete samples of 3 days, 7 days and 28 days shall be made according to different requirements as the basis for concrete quality control. The production of concrete samples shall be marked with sample number and production date. The samples used for factory inspection must be numbered continuously every year. 13、 A specially assigned person shall be responsible for the fabrication of test pieces and establish an account. 14、 There shall be technical basis for the adjustment of the concrete after leaving the machine. The adjustment personnel shall be authorized by the technical director and fill in the adjustment records. The concrete used for adjustment shall not exceed the original design strength grade, and a group of 28 day test pieces shall be reserved. 15、 When the concrete is returned due to various reasons after leaving the factory, the return record and account shall be carefully filled in and the reasons shall be analyzed to ensure the production quality of concrete. 16、 Computer control of mixer equipment: 1. Allowable error of static measurement: &%; 2. Allowable error of dynamic measurement for each tray, such as water;cement;sand;Stone; 3% admixture &% admixture &%; 3. On line detection of opening and closing of warehouse door; 4. Software zeroing; Auxiliary calibration; 5. Dynamic simulation display of production status and real-time display of various dynamic data; 6. Weighing dynamic automatic compensation; Weighing dynamic automatic correction; 7. The feeding sequence shall be adjusted in time according to needs; The mixing time shall be adjusted in time according to needs; 8. Production data shall be stored in time and transferred and exported regularly; Production data of any period can be queried; For more information about cement mixing plant, please consult our company