Investigation of Shear Strength of Clay Soil – Geotextile by Adding the BCF Waste Fibers

Document Type : Research Article

Author

Geotechnical engineering, Civil engineering, Yazd university, Yazd, Iran

Abstract

By placing the reinforcing elements, the shear strength of the soil improves. Several studies have been carried out on reinforcing of coarse grained soils, and less has been done on finegrained soils. Researches show that the shear strength of fine grained soil-geosynthetics is weaker than the coarse soils and should be to improve soil interaction with reinforcing elements. In this research, soil with about 80% passing the No.200 sieve and two types of non-woven geotextiles have been used. Shear strength of soil was considered by adding BCF waste polypropylene fibers with 0.2%, 0.7% and 1.2% by weight of dry soil. Shear strength of soil–geotextile determined by large direct shear machine and several tests were done in vertical loading–reloading conditions. Experimental results showed that vertical loading– reloading conditions increase interface shear strength. Addition of 0.7% fibers increase interface shear strength up to 15% and 9% in usual loading and loading-reloading conditions, respectively. Also increasing of normal stress in loading step, application of geotextile with higher tensile strength and reduction of moisture content are the factors improving shear strength of soil-geotextile in this study.

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References

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Amirkabir Journal of Civil Engineering
Volume 52, Issue 8
November 2020
Pages 1907-1922

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