Abstract

FERNANDES, B.; CHRIST, R.; QUININO, U.  and  TUTIKIAN, B.. Analysis of non-conformity concrete: long time effects. Rev. ALCONPAT [online]. 2016, vol.6, n.3, pp.261-270. ISSN 2007-6835.  https://doi.org/10.21041/ra.v6i3.154.

The aims of this paper is to contribute to the analysis of non-conformity concrete, focusing on long time effects. A review of compressive strength evolution, results variability and acceptance criteria was made. In addition, it is presented a case study of a nonconforming concrete used in composite structures (concretefilled steel columns) that present 28 days strength below the specified. Considering long time effects, a nominal strength gain above the limits considered in technical standards was observed. This analysis, associated with a revision of the structural design and a carefully assessment, could help decision taking in case of non-conformity concretes.

Keywords : non-conforming; strength gain; structural safety.