Controlo de qualidade do betão e de blocos

Abstract

Quality control is an aspect that should be known to all professionals involved in the processes of application of building materials, including concrete. This is because it is related to compliance with the requirements of quality, which directly interfere with expectations, safety and satisfaction of the user. In Mozambique, despite redoubled efforts, there has been no follow-up this aspect strictly. Concrete and block are materials of great use in the civil construction industry, and in Mozambique is no exception. Concrete compliance checks must be carried out for all structures, although some are more demanding than others, because allow to assess whether the class specified by the manufacturer corresponds to the class of the concrete provided. In the case of the block, it is necessary to classify them so that their application. In this study, 50 concrete samples and 21 block samples were analysed. For the concrete, a conformity check was carried out using NP EN 206-1, and subsequently verification of conformity and classification was carried out, taking into account the results of compressive strength. For the blocks, a classification was made using the Tables Techniques, after determining the compressive strength. In the analysis carried out, it was found that 68% of the samples did not conform in relation to the specified concrete. As for the classification of concrete, 54% of the samples had a lower class than specified. On the other hand, 67% of the block samples corresponded to the 2nd class and 19% were below this class.