Damping Characteristics of Silty Sand Reinforced With Carpet Waste Strips

Document Type : Research Article

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Abstract

A fiber reinforced soil behaves as a composite material in which fibers of relatively high tensile strength are embedded in a matrix of soil. Shear stresses in the soil mobilize tensile resistance in the fibers, which in turn imparts greater strength to the soil. In this paper a study on the influence of synthetic fibrous materials in improving the dynamic strength characteristics of a fine sandy soil is reported. The study is aimed at converting fibrous carpet waste into a value-added product for soil reinforcement. A series of stress controlled cyclic triaxial tests were carried out on fine sand specimens reinforced with randomly distributed carpet strips. The dynamic deformation properties of the reinforced sand are defined in terms of shear modulus and damping ratio. The effects of parameters such as fiber content and aspect ratio, number of cyclic loading and the level of confining pressure on the aforesaid parameters were investigated. The results clearly indicate the increase of damping ratio of reinforced samples in different confining pressure. The increase is more pronounced in higher fiber contents and aspect ratios. 

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References

[1]Lee, K. L.; Adams, B. D.; Vegneron, J. M.; “Reinforced Earth retaining walls” Journal of Soil Mechanics and Foundation Division, ASCE, vol.99, no. 10, p.p. 745-764, 1973. _
[2]Gray, D. H.; Ohashi, H.; “Mechanics of fiber reinforced in sand”, Journal of Geotechnical and Geoenvironmental Engineering, ASCE, vol. 109,no. 3, p.p. 335-353, 1983._
[3]Gray, D.; Rafeai, A.; “Behavior of fabric-versus fiber reinforced sand”, Journal of Geotechnical and Geoenvironmental Engineering, ASCE, Vol. 12,No. 8, pp. 804-820, 1986._
[4]Maher, M. H.; Gray, D. H.; “Static response of sand reinforced with distributed fibers”, Journal of Geotechnical Engineering, ASCE, vol. 116, no. 11,p.p. 1661–1677, 1990._
[5]Wang, Y.; Frost, J. D.; Murray, J.; Jones, A.; “Utilization of carpet, textile and apparel waste for soil reinforcement”, ARC 99, SPE Annual Recycling Conference, November 9-11, Dearborn,Michigan, 2000._
[6]Ghiassian, H.; Poorebrahim, G.; Gray, D. H.; “Soil reinforcement with recycled carpet wastes”,Journal of Waste Management and Research, vol.22, no. 2, p.p. 108-114, 2004. _
[7]Boominathan, S.; Senathipathi, K.; Jayaprakasam, V.; “Field studies on dynamic properties of reinforced earth”, Journal of Soil Dynamics and Earthquake Engineering, vol. 10, no. 8, p.p. 402-406, 1991.
[8]Krishnaswamy, N. R.; Isaac, N. T.; “Liquefaction analysis of saturated reinforced granular soils”,Journal of Geotechnical Engineering, ASCE, vol.121, no. 9, p.p. 645–651, 1995.
[9]Vercueil, D.; Billet, P.; Cordary, D.; “Study of the liquefaction resistance of a saturated sand  reinforced with geosynthetics”, Journal of Soil Dynamics and Earthquake Engineering, vol. 16,no. 16, p.p. 417-425, 1997.
[10]Noorany, I.; Uzdavines, M.; “Dynamic behavior of saturated sand with geosynthetic fibers”,Geosynthetics Conference, San Diego, USA, vol.2, p.p. 385–396, 1989.
[11]Maher, M. H.; Woods, R. D.; “Dynamic response of sand reinforced with randomly distributed fibers”, Journal of Geotechnical Engineering,ASCE, vol. 116, no. 7, p.p. 1116–1131, 1990.
[12]Feng, Z. Y.; Sutter, K. G.; “Dynamic properties of granulated rubber sand mixtures”, Geotechnical Testing Journal, GTJODJ, vol. 23, no. 3, p.p. 338-344, 2000.
[13]Li, J. ; Ding, D. W.; “Nonlinear elastic behavior of fiber reinforced soil under cyclic loading”, Journal of Soil Dynamics and Earthquake Engineering, vol.22, no. 22, p.p. 977-983, 2002._
[14]Boominathan, A.; Hari, S.; “Liquefaction Strength of Fly Ash Reinforced with Randomly Distributed Fibers”, Journal of Soil Dynamics and Earthquake Engineering, vol. 22, no. 22, p.p. 1027-1033, 2002._
[15]Poorebrahim, G.; “Soil reinforcement with carpet wastes”, Ph.D. Dissertation, Iran University of Science and Technology, Tehran, Iran, 2004.
[16]Michalowski, R. L; Cermak, J. ; “Triaxial Compression of Sand Reinforced with Fibers”Journal of Geotechnical and Geoenvironmental Engineering, ASCE, Vol. 129, No. 2, pp. 125–136,2003.
[17]Li, C.; “Mechanical response of fiber reinforced soil”, Ph.D. Dissertation, The University of Texas at Austin, USA, 2005.
[18]Ishihara, K.; “Soil behavior in earthquake geotechnics”, Clarendon Press, Oxford, 1996.
Amirkabir Journal of Civil Engineering
Volume 42, Issue 1 - Serial Number 1
February 2010
Pages 65-73

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