Methodology for Assessing the Quality of Building Materials

Assessment of the quality of building materials is an important step in obtaining commercial products. The information on the assessment of the representativeness of the sample in determining the quality of building materials is provided. In the work, we used a technique for assessing the quality of ceramic bricks in accordance with the Russian standard GOST 530-2012, as well as plaster mixtures in accordance with the Russian standard GOST 33083-2014. The number of samples in the sample was calculated taking into account the risk of the supplier and the consumer. The discrepancy between the number of samples specified in the regulatory documents and the calculated data was revealed. The values of standard confidence probabilities, supplier's and consumer’s risk are revealed. It is proposed to indicate, when determining the sample size in the methods for assessing the quality of building materials, the value of the confidence level, the maximum error, which will make it possible to more objectively judge the entire batch of products.