Avaliação de Propriedades Físicas e Mecânicas de Concretos Produzidos com a Utilização de Diferentes Impermeabilizantes

Abstract

The objective of this work was to study the effect of hydrophobic and crystallizing agents applied to concrete, by carrying out axial compression resistance tests (NBR 16.889/2020), water absorption by immersion (NBR 9778/2009) and water absorption by capillarity (NBR 9779/2012). The results suggest the interference of the waterproofing additive in the mechanical properties of the concrete, causing a 37% drop in the resistance of concretes produced with water repellent additive and 28% for concretes with the addition of crystallizers. With regard to watertightness, the results indicate little effectiveness of waterproofing additives, in which a 7.83% reduction in absorption was obtained with the use of crystallizing additives and even a 1.44% increase in absorption with the use of water repellent additives.