Abstract
Inclusion of synthetic fibers is becoming a routine task in soil reinforcement. The ability of synthetic fibers in controlling the shrinkage cracks in concrete is the main drive to consider its benefits in clay and other soil materials. The polypropylene fibers are nonbiodegradable and can perform well even in aggressive chemical exposure conditions. The direct shear testing is a popular geotechnical approach to assess the shearing strength for a range of soils. This study is aimed at investigating the effect of fiber inclusion on the direct shear response of semi-arid clay soils. This research is conducted using two different types of polypropylene fibers, viz., Fibercast and Fibermesh, having different surface properties on the shear strength envelope and parameters (angle of internal friction and cohesion). The aspect lengths were varied as 6 and 12 mm, and the dosages were varied as 0.2, 0.4, and 0.6 % by weight of the soil. The results were viewed in relation to the fiber type, size, and dose. The soil response and shear resistance measured in consolidated undrained direct shear test is presented for the targeted doses, and the results revealed useful insight compared to unreinforced. The Fibermesh material proved to be the more appropriate fiber additive to typical semi-arid clay soils. The data provides helpful guide for the design geotechnical engineers.
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References
Amir-Faryar B, Aggour MS (2012) Determination of optimum fiber content in a fiber-reinforced clay. J Test Eval 40(2):334–337. doi:10.1520/JTE104034 ISSN 0090-3973
ASTM D3080M-11 (2011) Standard test method for direct shear test of soils under consolidated drained conditions. ASTM West Conshohocken, PA
ASTM D698-00 (2000) Standard test methods for laboratory compaction characteristics of soil using standard effort (12,400 ft-lbf/ft3 (600 kN-m/m3)). ASTM West Conshohocken, PA
Babu GLS, Chouksey SK (2010) Model for analysis of fiber-reinforced clayey soil. Geomechanics and Geoengineering 5(4):277–285
Babu, G.L.S., and Vasudevan, A.K. (2008) Strength and stiffness response of coir fiber-reinforced tropical soil. 20(9):571–577
Dafalla, M.A. (2013). Effect of clay and moisture content on direct shear tests for clay-sand mixtures. Adv Mater Sci Eng Volume 2013, Article ID 562726, 8 pages. http://dx.doi.org/10.1155/2013/562726.
Dafalla MA, Moghal AAB, Al-Obaid AAK (2017) Enhancing tensile strength in clays using polypropylene fibers. International Journal of Geomate 12(29):33–37
Gray DH, Ohashi H (1983) Mechanics of fiber reinforcement in sand. J Geotech Eng 109(3):335–353
Hannant, D. J. (1978) Fibre cement and fibre concretes. John Wiley and Sons, Ltd., 1978
Kaniraj SR, Gayathri V (2003) Factors influencing the strength of cement fly ash base courses. Journal of Transport Eng 129(5):538–548
Kudo, M., Ochiai, H. and Omine, K. (2001) Mechanical properties of short fibers mixture stabilized volcanic cohesive soil, Land marks in earth reinforcement. Proceedings of the International Conference on Earth Reinforcement, Japan 2001, p 73–76
Malekzadeh M, Bilsel H (2012) Swell and compressibility of fiber reinforced expansive soils. International Journal of Advanced Technology in Civil Engineering 1(2):42–45
Marandi SM, Bagheripour MH, Rahgozar R, Zare H (2008) Strength and ductility of randomly distributed palm fibers reinforced silty-sand soils. Am J Appl Sci 5(3):209–220
Miller JC, Rifai S (2004) Fiber reinforcement for waste containment soil liners. J Environ Eng 130(8):891–895
Moghal AAB, Al-Obaid AK, Al-Refeai TO, Al-Shamrani MA (2015) Compressibility and durability characteristics of lime treated expansive semiarid soils. J Test Eval 43(2):255–263
Moghal AAB, Al-Obaid AK, Al-Refeai TO (2014) Effect of accelerated loading on the compressibility characteristics of lime treated semi arid soils. J Mater Civ Eng 26(5):1009–1016
Puppala, A.J and Musenda, C. (2000) Effects of fiber reinforcement on strength and volume change behaviour of expansive soils. Transportation research board, TRR No. 1736, Washington, D.C., p 134–140
Puppala, A.J., Wattanasanticharoen, E., and Porbaha, A. (2006) Book Chapter: Expansive soils recent advances in characterization and treatment. In: Al-Rawas AA, Goosen ZFA (eds) Combined lime and polypropylene fiber stabilization for modification of expansive soils. Taylor & Francis. doi: 10.1201/9780203968079.ch24
Rousé PC (2014) Comparison of methods for the measurement of the angle of repose of granular materials. Geotech Test J 37(1):1–5
Tex-107-E (1999) Test procedure for determining the bar linear shrinkage of soils. Texas Department of Transportation document. Construction Division, Austin, Texas
Ziegler S, Leshchinsky D, Ling HI, Perry EB (1998) Effect of. Short Polymeric Fibers on Crack Development in Clays 38(1):247–253
Acknowledgments
This project was funded by the National Plan for Science, Technology and Innovation (MAARIFAH), King Abdulaziz City for Science and Technology, Kingdom of Saudi Arabia, Award Number 11BUI1489-02.
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Dafalla, M.A., Moghal, A.A.B. Effect of Fibercast and Fibermesh inclusion on the direct shear and linear shrinkage response of clay. Arab J Geosci 9, 555 (2016). https://doi.org/10.1007/s12517-016-2565-9
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DOI: https://doi.org/10.1007/s12517-016-2565-9