Avaliação do controle tecnológico do concreto conforme a ABNT 12655 de um empreendimento localizado na cidade de Paulo Afonso / BA

Abstract

This work presents a case study of the technological analysis of the concrete used in a medium- sized work, located in the city of Paulo Afonso/BA. The resistance of the specimens was investigated, following the regulations of NBR 12655 (ABNT, 2015c). 11 batches were analyzed, whose batches were separated by period. In the project, used concrete and cast-in-place concrete were used. Test specimens were made, according to the consistency test described in item 6.1 of NBR 12655 (ABNT, 2015). And the slump test of the molding cone of the specimens was carried out, using materials provided by the Laboratory of the Federal University of Alagoas - Campus UFAL Sertão. The resistance requested in the project was a f_ck of 25 MPa, therefore, of the 11 lots, 7 presented breaking strength higher than 25 MPa, thus being in compliance with NBR 12655 (ABNT, 2015c), 3 lots were classified as “ non-compliant”, in accordance with the aforementioned Standard, and 1 of the batches wasdiscarded due to non-compliance with the criteria established for a resistance check consistentwith the required regulation. For the present work, conventional concrete was used.