Análisis de datos de resistencia del concreto con Python 3.13.3: Evaluación estadística de la homogeneidad del hormigón

Luis Patricio Juna Pozo; Mayra Alejandra Tigre Sánchez; Luis Stalin Jara Obregón; Wilfrido Damián Rodríguez Quinteros; Ruth Elizabeth Quito Guachamin

doi:10.37431/conectividad.v7i1.350

Authors

Luis Patricio Juna Pozo Universidad Central del Ecuador https://orcid.org/0009-0005-9006-0502
Mayra Alejandra Tigre Sánchez Universidad Católica de Cuenca https://orcid.org/0000-0003-2018-7362
Luis Stalin Jara Obregón Universidad Católica de Cuenca https://orcid.org/0000-0003-4958-5698
Wilfrido Damián Rodríguez Quinteros Universidad Católica de Cuenca https://orcid.org/0009-0008-8129-1028
Ruth Elizabeth Quito Guachamin Pontificia Universidad Católica del Ecuador https://orcid.org/0009-0000-9477-0601

DOI:

https://doi.org/10.37431/conectividad.v7i1.350

Keywords:

Concrete strength, Mann-Whitney U test, Variability, Homogeneity

Abstract

Verifying the structural integrity of existing buildings is essential when considering their reuse, such as a retaining wall intended to support a new adjacent structure. This wall, made of reinforced concrete with irregular geometry, was evaluated using a non-destructive method: the rebound hammer test. A total of 48 measurements were taken using a Proceq Silver Schmidt Type N hammer, yielding Q-values above 42, which correspond to an estimated strength greater than 210 kg/cm², in compliance with the Ecuadorian Construction Code (NEC). Measurements were taken in both vertical and horizontal orientations and analyzed statistically. Since the data did not follow a normal distribution, the non-parametric Mann-Whitney U test was applied. The results showed statistically significant differences between the orientations, revealing considerable variability in the concrete's strength. This lack of homogeneity indicates that the wall does not possess the required structural capacity to support additional loads. The study highlights the effectiveness of statistical tools in assessing in-situ concrete quality without destructive testing methods.

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