Factores de corrección a la resistencia a compresión de testigos de hormigón. Análisis crítico de las normas cubanas e internacionales

Abstract

The cuban standard NC 724:2015 only demands the application of one correction factor to the compressive strength of concrete cores, and includes two more as an informative way, one of them with incongruities. On the other side, international standards demand the use of 4 correction factors. The critical analysis of the international standards allows proposing the correction factors that should appear on an upgrade of the NC 724. Finally using a database of concrete cores of 15 buildings in Havana, it's proven that the differences in the corrected compressive strength of the concrete cores, obtained when applying the propose correction factors and the ones obtained when applying the NC 274:2015 are statistically significant, reaching average values of 15 %.