AVALIAÇÃO DO DESEMPENHO DE CONCRETOS COM ADITIVO CRISTALIZANTE

Abstract

The degradation process of concrete structures has become increasingly precocious and frequent, this fact is associated with the penetration of aggressive substances into the interior of the structures. In this context, the crystallizing additive is currently being used to reduce the porosity of the structures, since this additive develops insoluble crystalline compounds inside the pores and cracks in the concrete. The objective of this article is to evaluate the performance of the crystallizing additive in decreasing the permeability of concrete and its influence on the mechanical properties of the material. For this, the analysis was performed through the tests of mechanical performance, capillarity, porosity and void index. The results of these tests pointed out advantages in the use of the crystallizing additive to obtain a more durable concrete, given that there was a considerable decrease in water absorption and voids indexes and an increase in the mechanical strength of the concrete.