К ВОПРОСУ О КОНТРОЛЕ КАЧЕСТВА БЕТОНА

Abstract

The article provides information on the results of assessing the quality of concrete internal wall panels. The requirements of various regulatory documents for the rules for accepting a batch of concrete are considered. The procedure of statistical sampling control on a quantitative basis is described. According to the statistical data of the factory laboratory of Open Joint Stock Company “ZhBK-1” (Penza) on the quality of grade 300 concrete in the manufacture of internal wall panels, the influence of the type of cement on the variability of concrete strength indicators is considered. The influence of the type of cement on the decision to accept a batch of concrete is established. Due to the higher value of the standard deviation of the quality indicators of Haldenberg cement in comparison with Sengileevsky cement, the acceptance of a batch of concrete depends on the level of product defectiveness. It is revealed that, depending on the number of samples during testing, the decision on batch acceptance, made in accordance with GOST 10180-2012 and GOST R ISO 12491-2011, may be different. It is proposed to amend GOST 10180-2012 in paragraph 4 regarding the number of samples for testing, taking into account the requirements of GOST R ISO 12491. This will contribute to a more objective decision on the acceptance of the batch. The effect of the type of cement on the reproducibility of the production process is shown.