TESTE DE PRECISÃO E ANÁLISE ESTATÍSTICA EM LOTES DE BLOCOS CERÂMICOS SEGUNDO A ABNT/NBR 15270-1 DE 2017 NO MUNICÍPIO DE SANTA HELENA DE GOIÁS

Abstract

The construction process of any building is characterized by several factors and stages, the main ones being cost, quality of materials and the executive system. Thus, the construction market currently represents a significant portion of the entire market in Brazil. The representativeness of civil construction requires improvements in the production process of materials from the market and industries in the sector, in particular ceramic blocks, as low quality parts cause higher costs and future pathologies in the building. In this way, the need to evaluate the ceramic blocks in order to have the quality control of the works is evidenced. That said, the work aims to qualitatively and quantitatively evaluate the ceramic blocks through tests of deviation in relation to the square, flatness of the faces, visual and identification tests, based on NBR 15270-1 (ABNT, 2017a). The evaluation was carried out in four companies and an autonomous distributor of ceramic blocks in the city of Santa Helena de Goiás. After obtaining the test results, ANOVA statistical analysis was applied, as well as its calculations to obtain, as mean, standard deviation, variance, f, and p factors to verify whether there was a significant difference in the quality of ceramic blocks in the quality factors evaluated and provided by the companies that market them, as well as the identification of the best batches sold, both in the standard factor, and in the statistical factor, and to end the verification of the blocks' standard compliance with the requirements of NBR 15270-1 (ABNT, 2017a). It was concluded that the ceramic blocks used in buildings in the municipality of Santa Helena de Goiás have good quality in the geometric sense and inefficiency in the visual and identification sense, where they had large and total failure rates according to NBR 15270-1(ABNT, 2017a), observed that the batch of the autonomous supplier had the worst performance both in terms of standards and in the statistical result (ANOVA), where a significant difference was identified with the other batches analyzed, thus realizing through the questionnaires the importance of consumers only in the price of the materials used, leaving issues of quality, inspection, among others aside, very similar to the other tests carried out in various locations in the country, both in terms of the tests, and in terms of the perception of consumers and distributors in this area. of ceramic blocks.