Estimation of unconfined compressive strength of cement-stabilized jabre as material upgrade on highway construction

E. Teijón-López-Zuazo; Á. Vega-Zamanillo; M. Á. Calzada-Pérez; L. Juli-Gándara

doi:10.3989/mc.2020.09019

Autores/as

E. Teijón-López-Zuazo Construction and Agronomy Department, Zamora Polytechnical School, University of Salamanca https://orcid.org/0000-0002-9962-4846
Á. Vega-Zamanillo Department of Transportation and Projects and Processes Technology. Civil Engineering Technical School of Santander, University of Cantabria https://orcid.org/0000-0002-7140-6329
M. Á. Calzada-Pérez Department of Transportation and Projects and Processes Technology. Civil Engineering Technical School of Santander, University of Cantabria https://orcid.org/0000-0001-6528-9392
L. Juli-Gándara Department of Transportation and Projects and Processes Technology. Civil Engineering Technical School of Santander, University of Cantabria https://orcid.org/0000-0003-1802-7191

DOI:

https://doi.org/10.3989/mc.2020.09019

Palabras clave:

Granito, Cemento con adiciones, Curado, Resistencia a la compresión, Modelización

Resumen

La roca granítica presenta habitualmente un horizonte de alteración con varios metros de potencia. La arena arcillosa resultante como producto de alteración se denomina comúnmente jabre. Aunque la fórmula de trabajo de la estabilización de jabre con cemento se verifique correctamente en tramos de prueba, la estabilización “in situ” del jabre con cemento presenta habitualmente elevadas dispersiones. Entre los ensayos de laboratorio efectuados se encuentran los ensayos de análisis granulométrico, límites de Atterberg, resistencia a compresión simple (RCS), la densidad y humedad sobre probetas de suelo estabilizado, Proctor modificado, índice CBR (California Bearing Ratio) y el plazo de trabajabilidad de la mezcla con cemento. La curva de endurecimiento del suelo estabilizado fue ajustada mediante un modelo multilineal. Aunque tradicionalmente se especifique la RCS a 7 días, buscando definir un mejor comportamiento del material, los autores calcularon otros modelos de jabre estabilizado para roturas a 7, 14 y 28 días.

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