Behavior of Cohesive Soil Reinforced by Polypropylene Fiber

Al-Neami, Mohammed A.; Raheel, Falah Hasan; Al-Ani, Yassein H.

doi:10.30684/etj.v38i6A.109

	Behavior of Cohesive Soil Reinforced by Polypropylene Fiber
Engineering and Technology Journal
Article 1, Volume 38, 6A, 2020, Pages 801-812 PDF (1.63 M)
DOI: 10.30684/etj.v38i6A.109
Authors
Mohammed A. Al-Neami^* ¹; Falah Hasan Raheel²; Yassein H. Al-Ani³
¹University of Technology, Baghdad, Iraq.
²civil department, university of technology, Baghdad, Iraq
³University of Technology, Baghdad, Iraq,
Abstract
For any land-based structure, the foundation is very important and has to be strong to support the entire structure. In order for the foundation to be strong, the soil underneath it plays a very critical role. Some projects where the soil compacted by modifying energy is insufficient to achieve the required results, so the additives as a kind of installation and reinforcement are used to achieve the required improvement. This study introduces an attempt to improve cohesive soil by using Polypropylene Fiber instead of conventional kinds used in soil stabilization. Three different percentages (0.25%, 0.5%, and 0.75% by dry weight of soil) and lengths (6, 12, and 18) mm of fiber are mixed with cohesive as a trial to enhance some properties of clay. The results of soil samples prepared at a dry density at three different water conditions (optimum water content, dry side, and wet side) showed that the increase of the percentage and length of polypropylene fiber causes a reduction in the maximum dry density of soils. Soil cohesion increases with the increase of PPF up to 0.5% then decreased. The length of Polypropylene fiber has a great effect on the cohesion of soil and adding 0.5% Polypropylene fibers with a length of 18mm to the soils consider the optimum mix for design purposes to improve the soil. Finally, the soil reinforced by PPF exhibits a reduction in the values of the compression ratio (CR) and accelerates the consolidation of the soil.
Keywords
Cohesive soil; Shear Strength; fiber; SOIL COMPACTION

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