Evaluation of Sisal and Curauá Fibers Inclusions on Strength and Stiffness Response of Soil
M.V. Silveira, M.D.T. Casagrande
Abstract. This experimental study reports the behavior of a reinforced and unreinforced granular soil with the addition of short sisal and curauá fibers. The fibers used as soil reinforcing element are extracted from the leaves of the plants curauá (Ananás erectifolius) and sisal (Agave sisalana). These vegetal fibers were chosen because they have good mechanical properties and the need for new renewable materials. The sisal and curauá fibers were mixed with granular soil in a randomly distributed form to evaluate its influence on the mechanical properties of the soil. A series of triaxial compression isotropic drained test was performed to seek to establish patterns of behavior that might explain the influence of the addition of vegetal fibers, relating it to the shear strength and deformation parameters of the soil. The tests were performed on samples subjected to a relative density of 50%, moisture content of 10%, fibers content in proportions of 0 and 0.5% of the dry weight of the soil and the fibers lengths of 25mm. Through the obtained results, it was observed that the addition of sisal and curauá fibers randomly distributed leads to significant improvements in the mechanical properties of the soil, since it was observed an increase in the cohesion and angle of friction of the mixtures compared to the values obtained for the pure soil. The results show the potential of sisal and curauá fibers used as reinforcement of soils in earthwork layers subjected to static loads, such as landfills and embankments on soft soils.
Keywords
Vegetal Fibers, Soil Reinforcement, Triaxial Tests, Mechanical Behavior
Published online , 8 pages
Copyright © 2018 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: M.V. Silveira, M.D.T. Casagrande, ‘Evaluation of Sisal and Curauá Fibers Inclusions on Strength and Stiffness Response of Soil’, Materials Research Proceedings, Vol. 7, pp 791-798, 2018
DOI: https://dx.doi.org/10.21741/9781945291838-78
The article was published as article 78 of the book Non-Conventional Materials and Technologies
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