Analysis of macrotexture and skid resistance in flexible pavements using standardised methods
Palabras clave:
Macrotextura; Resistencia al deslizamiento; Pavimentos flexibles; ASTM E965; ASTM E303Resumen
DOI: https://doi.org/10.46296/ig.v8i16.0302
Resumen
El estudio evaluó la relación entre la macrotextura del pavimento y la fricción en condiciones húmedas en una sección flexible de la carretera El Venado (El Carmen, Manabí, Ecuador). El objetivo fue establecer una correlación cuantitativa entre la Profundidad Media de Textura (MTD) y el Número de Péndulo Británico (BPN). Se aplicaron métodos estandarizados: ASTM E965 (parche de arena) para MTD y ASTM E303 (British Pendulum Tester) para BPN. Se definieron cinco secciones de 50 m con cinco puntos por sección (n = 25), con control ambiental y calibración del instrumento. El análisis estadístico (Pearson y MCO) indicó una asociación positiva y significativa (r = 0,91; R² = 0,83) y un modelo lineal BPN = 28,54 + 51,04·MTD. Un aumento de 0,1 mm en MTD elevó BPN en aproximadamente 5,1 unidades. Los residuos exhibieron normalidad y homocedasticidad, confirmando la validez del modelo. Se concluyó que la macrotextura actuó como un predictor sólido de la fricción en pavimentos flexibles y proporciona una herramienta operativa para priorizar el mantenimiento y las auditorías de seguridad vial, y se recomienda una recalibración para diferentes gradaciones de agregados, climas y niveles de tráfico.
Palabras clave: Macrotextura; Resistencia al deslizamiento; Pavimentos flexibles; ASTM E965; ASTM E303.
Abstract
The study assessed the relationship between pavement macrotexture and wet-condition friction on a flexible section of El Venado Road (El Carmen, Manabí, Ecuador). The objective was to establish a quantitative correlation between Mean Texture Depth (MTD) and the British Pendulum Number (BPN). Standardised methods were applied: ASTM E965 (sand patch) for MTD and ASTM E303 (British Pendulum Tester) for BPN. Five 50 m sections were defined with five points per section (n = 25), with environmental control and instrument calibration. Statistical analysis (Pearson and OLS) indicated a positive, significant association (r = 0.91; R² = 0.83) and a linear model BPN = 28.54 + 51.04·MTD. A 0.1 mm increase in MTD raised BPN by approximately 5.1 units. Residuals exhibited normality and homoscedasticity, confirming model validity. It was concluded that macrotexture acted as a robust predictor of friction on flexible pavements and provides an operational tool to prioritise maintenance and road safety audits, with recalibration advised for different aggregate gradations, climates, and traffic levels.
Keywords: Macrotexture; Skid resistance; Flexible pavements; ASTM E965; ASTM E303.
Información del manuscrito:
Fecha de recepción: 08 de julio de 2025.
Fecha de aceptación: 18 de septiembre de 2025.
Fecha de publicación: 27 de octubre de 2025.
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Derechos de autor 2025 Revista Científica INGENIAR: Ingeniería, Tecnología e Investigación. ISSN: 2737-6249.
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