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

Document Type : Research Article


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


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.


Main Subjects

[1]S. Haeri, R. Noorzad, A. Oskoorouchi, Effect of geotextile reinforcement on the mechanical behavior of sand, Geotextiles and Geomembranes, 18(6) (2000) 385-402.
[2]N. Moraci, G. Cardile, D. Gioffrè, M.C. Mandaglio, L.S. Calvarano, L. Carbone, Soil geosynthetic interaction: design parameters from experimental and theoretical analysis, Transportation Infrastructure Geotechnology, 1(2) (2014) 165-227.
[3]M. Lopes, Soil-geosynthetic interaction Geosynthetics and their Applications ed SK Shukla, in, London: Thomas Telford, 2002.
[4]Q. Yan, C. Li, Y. Mei, W. Deng, Study on the characteristics of geogrids/soil interface, in:  Mechanic Automation and Control Engineering (MACE), 2010 International Conference on, IEEE, 2010, pp. 12411248.
[5]M. Abu-Farsakh, J. Coronel, M. Tao, Effect of soil moisture content and dry density on cohesive soil– geosynthetic interactions using large direct shear tests, Journal of Materials in Civil Engineering, 19(7) (2007) 540-549.
[6]F. Ferreira, C.S. Vieira, M. Lopes, Direct shear behaviour of residual soil–geosynthetic interfaces– influence of soil moisture content, soil density and geosynthetic type, Geosynthetics International, 22(3) (2015) 257-272.
[7]A. Mahmood, N. Zakaria, F. Ahmad, Studies on geotextile/soil interface shear behavior, Electronic Journal of Geotechnical Engineering, 5 (2000).
[8]Anubhav, P. Basudhar, Modeling of soil–woven geotextile interface behavior from direct shear test results, Geotextiles and Geomembranes, 28(4) (2010)403-408.
[9]M.B. Hossain, M.Z. Hossain, T. Sakai, Interaction properties of geosynthetic with different backfill soils, International Journal of Geosciences, 3(05) (2012) 1033.
[10]Anubhav, P. Basudhar, Interface behavior of woven geotextile with rounded and angular particle sand, Journal of Materials in Civil Engineering, 25(12) (2013) 1970-1974.
[11]Anubhav, H. Wu, Modelling of non-linear shear displacement behaviour of soil–geotextile interface, International Journal of Geosynthetics and Ground Engineering, 1(2) (2015) 19.
[12]P. Vangla, M.L. Gali, Effect of particle size of sand and surface asperities of reinforcement on their interface shear behaviour, Geotextiles and Geomembranes, 44(3) (2016) 254-268.
[13]P. Punetha, P. Mohanty, M. Samanta, Microstructural investigation on mechanical behavior of soilgeosynthetic interface in direct shear test, Geotextiles and Geomembranes, 45(3) (2017) 197-210.
[15]M. Abedi, M. Arjmand, A. Hajiannia, Experimental study of the effect of geotextile layers on the improvement of soil-geogrid interaction in clay reinforced with geosynthetic, International Conference on Civil Engineering , Architecture and Urban Cityscape, (2016). (in persian).
[16]S.M. Hejazi, M. Sheikhzadeh, S.M. Abtahi, A. Zadhoush, A simple review of soil reinforcement by using natural and synthetic fibers, Construction and building materials, 30 (2012) 100-116.
[17]C.S. Priya, S. Archana, A.B. Albert, A. Deeraj, Stabilization of clayey soil using polypropylene fiber, International Research Journal of Engineering and Technology (IRJET), 4(4) (2017) 1252-1255.
[18]A. Estabragh, S. Ranjbari, A. Javadi, Properties of clay soil and soil cement reinforced with polypropylene fibers, in, American Concrete Institute, 2017.
[19]C.A. Anagnostopoulos, D. Tzetzis, K. Berketis, Evaluation of the Shear Strength Behaviour of Polypropylene and Carbon Fibre Reinforced Cohesive Soils, Research Journal of Applied Sciences, Engineering and Technology, 7(20) (2014) 4327-4342.
[20]A.S. Zaimoglu, T. Yetimoglu, Strength behavior of fine grained soil reinforced with randomly distributed polypropylene fibers, Geotechnical and Geological Engineering, 30(1) (2012) 197-203.
[21]ASTM D422-63, Standard test method for particlesize analysis of soils,  (2002).
[22]ASTM D854 – 10, Standard test methods for specific gravity of soil solids by water pycnometer, ASTM International, (2010).
[23]ASTM D427, Standard test method for shrinkage factors of soils by the mercury method, Annual book of ASTM Standards, 4  (2003) 21-24.
[24]ASTM D4318,Standard test methods for liquid limit, plastic limit, and plasticity index of soils, ASTM international, (2010).
[25]D. ASTM D698-00a, Standard test methods for laboratory Compaction Characteristics of Soil Using Standard Effort (12,400 ft-lbf/ft3 (600 kN-m/m3)), Annual Book of ASTM Standards, American Society for Testing and Materials,  (2000) 1-7.
[26]ASTM D2487, Testing, Materials, Standard practice for classification of soils for engineering purposes (Unified Soil Classification System), (2000).
[27]S. Mali, B. Singh, Strength behaviour of cohesive soils reinforced with fibers, International Journal of Civil Engineering Research, 5(4) (2014) 353-360.
[28]ASTM D5321/D5321M,, Standard test method for determining the shear strength of soil-geosynthetic and geosynthetic-geosynthetic interfaces by direct shear,(2014).
[29]ASTM D3080, Testing, Materials, Standard test method for direct shear test of soils under consolidated drained conditions, (1998).
[30]J. Ghaffari, Experimental investigation of time effect on shear strength parameters of soil-geosynthetic interface, PhD thesis, K.N. Toosi university of technology, (2013). (in persian).
[31]N. Mahboobimotlagh, A. Mahboobiardakani, Evaluation of the effect of adding lime to shear strength parameters of clay-geosynthetic interface, Scientific Quarterly Journal, GEOSCIENCES, 27(108) (2018). (in persian).