EMPREGO DE RESINAS POLIURETÂNICAS NA OPERAÇÃO DE CAPEAMENTO DE CORPOS DE PROVA CILÍNDRICOS DE CONCRETO

Abstract

The parallelism between the top and the base of cylindrical concrete specimens is fundamental for the performance of the compression test. Up to the date of writing this article, three methods were known that satisfactorily carried out this operation, namely: milling, grouting and casting with molten sulfur. The latter is the one that gives the best results to the test, in addition to presenting fast curing and less waiting time to make the rupture. On the other hand, during the capping operation, the sulfur needs to be heated to a very high temperature, which exposes the technician to toxic gases and the risk of burns. The objective of this work was to find a material for capping specimens that would provide the same results for the compression test obtained with the use of sulfur, but that would be non-toxic, easy to apply and safer for the operator. The two-component polyurethane-based resin presented in this article has all these characteristics.