Propuesta de un procedimiento de validación y cálculo de incertidumbre para ensayos de compresión en cilindros de hormigón –Caso de aplicación LEMSUR-EPN.

Abstract

This work propose a procedure to be followed for the validation of the compression test method in concrete cylinders carried out according to ASTM C39 / C39M-18 "Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens"; It also presents a methodology to follow for the calculation of uncertainty associated with the results obtained in this test in the LEMSUR. Experimental tests were conducted, the results of which were statistically treated through the application of analysis of variance (ANOVA) and significance tests (F and T); thus allowing to analyze performance parameters of the method, such as: work interval, accuracy, robustness, quality of the measurement system and uncertainty. The validation parameters analyzed were chosen taking into account that the concrete compression test is a destructive test and that reference material is not available. As a result, it was obtained that not all the validation parameters selected are applicable due to the conditions described in the previous paragraph. Within this context and taking what is specified in the ISO 17025: 2017 standard that indicates that the validation is applied in non-standardized methods, a verification of the method that will serve as a guide to improve its performance was carried out.