How to do concrete production quality management in winter

With the development of engineering construction, in order to ensure progress, some engineering projects still need to be constructed in winter, so there is still a large demand for concrete. Can the mixing station be capable of mixing and transporting winter concrete under the premise of ensuring the quality of concrete? Pumping has become a common concern for both parties in the concrete process. For the production of concrete mixing plants, adjustments must be made in winter in low-temperature production.

The construction of the winter project stipulates that when winter is approaching, if the daily average temperature for 5 consecutive days is stable below 5 ° C, the first day of the 5 days is the beginning of the winter application, and when the temperature becomes warm, the daily average temperature of the last day Stable above 5 ° C, the last day of the five days is the end of winter application. Concrete mixing stations should be fully prepared for winter production to ensure concrete quality. The work done in multiple links of the previous production process should be adjusted from multiple aspects, and the specific preparations and facilities measures for winter production should be studied and decided. Specific measures should be formulated for production, both to ensure the quality of concrete and to ensure economic rationality.

Concrete mixing station

The mixing station should prepare corresponding materials according to the requirements of the winter production plan, such as anti-freezing admixtures, plastic films, and thermal insulation materials such as tarpaulin. Strengthen the management of original materials and basic work, organize staff to conduct winter production work training, and provide technical knowledge to operators, assign special personnel to be responsible for adding additives, temperature measurement, insulation and other work, and make detailed records. The concrete mixing station equipment should be closed, and various insulation materials, additives, and protective supplies should be organized into the field in a timely manner. Arrange a special person to measure the production environment temperature, raw material temperature, concrete exit temperature and make a record. Optimize the concrete mix ratio. In order to shorten the curing time and improve early strength, winter concrete should generally use silicic acid cement or ordinary silicic acid cement. The cement strength should not be less than 42.5Mpa, and the amount of cementitious material in cubic meters of concrete should not be less than 300kg. The water-cement ratio should not be higher than .6. The admixtures must be appraised and certified. They are not used at will.

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