Abstract

CACERES CARDENAS, Luis Alberto; ESLAVA MORENO, Karen Inés  and  ALVAREZ VEGA, Edwin Ricardo. Effect of the addition of hemp fiber in the properties of strenght and resistivity in a clayey soil. Rev. logos cienc. tecnol. [online]. 2022, vol.14, n.3, pp.8-23.  Epub Nov 12, 2022. ISSN 2145-594X.  https://doi.org/10.22335/rlct.v14i3.1650.

The investigation has the aim of finding the effect and adequate proportion of the hemp fiber of 4 cm in length, in the mechanical and resistivity properties of a clayey soil. Properties investigated include optimum moisture content (wópt); the maximum dry unit weight, (Ydmax), cohesion (c); friction angle (Ф), unconfined compressive strength (qu), and electrical resistivity (p). The modified Proctor compaction tests (ASTM D 1557-12), direct consolidated undrained shear, CU, for cohesive soils (ASTM 6528-17), unconfined compressive strength (ASTM D2166-16) and Wenner's four electrode test (ASTM G57-01l), were applied to three clay samples with different proportions of hemp fiber; standard sample, Ap, of 100 % clay from the city of Tunja, sample with 0.5 % and 0.75 % hemp fiber, A0.5 %, and A0.75 %, in relation to the dry weight of the material. The results of this study indicate that the optimal percentage of hemp is 0.5 %, showing a decrease in compaction, and an increase in shear strength, electrical resistivity properties and unconfined compression properties; nevertheless, with a greater presence of fiber, there is destruction of the clayey soil.

Keywords : geological engineering; soil mechanics; construction materials; clay; natural fiber.

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