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

• Main Authors: E. Teijón-López-Zuazo, Á. Vega-Zamanillo, M. Á. Calzada-Pérez, L. Juli-Gándara
• Format: Article
• Language: English
• Published: Consejo Superior de Investigaciones Científicas 2020-06-01
• Series: Materiales de Construccion
• Subjects: granite; blended cement; curing; compressive strength; modelization
• Online Access: http://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/2287

Granite rock has powerful alterations at several meters of depth. The clayed sand resulting is commonly known as jabre. This “in situ” mixture of cement-stabilized soil requires a laboratory formula. Even when the test section is correctly verified, the mechanical properties of the homogeneous mixture of jabre exhibit high degrees of dispersion. The laboratory work undertaken included particle-size analysis and screening, defini­tion of liquid and plastic limits, compressive strength, dry density and moisture content over stabilized samples, modified Proctor, California Bearing Ratio (CBR) and the determination of the workability of the hydrauli­cally bound mixtures. The stress resistance curve was analyzed by means of a multilinear model of unconfined compressive strength (UCS). Since practical engineering only requires UCS for 7 days, in order to gain greater knowledge of the material, other UCS transformations were used at other curing times such as 7, 14 and 28 days.