Evaluation of Destructive and Non-Destructive Methods for Determining Concrete Strength: Sclerometry and Compression Testing in the Department of Nariño, Colombia

Abstract

This study establishes a correlation between two methods to determine the strength of concrete: the rebound number (NTC 3692) and the compressive strength (NTC 673). To this end, concrete cylinders 30 cm high and 15 cm in diameter were manufactured with two types of mixtures: one with sand from the "El Espino" quarry and crushed from the "Pabón" mine, and another with sand from "El Espino" and crushed from the "Pilcuan" mine. Resistances of 2500, 3000, 3500 and 4000 psi were evaluated, analyzing a total of 20 cylinders by resistance and mixture, of which 10 were subjected to the rebound test and the other 10 to compression. In addition, for the "Pabón" mixture, accelerant tests were incorporated at 7 and 14 days. The results obtained were analyzed by statistical regression, obtaining an exponential correlation equation. This equation was integrated into the Hammerlink software for use with the Silver Schmidt sclerometer, allowing the estimation of concrete strength in a non-destructive manner with a high degree of reliability. It is concluded that sclerometry is a viable alternative for estimating the strength of concrete, reducing costs and minimizing structural damage compared to destructive testing.