IJEP 45(3): 222-230 : Vol. 45 Issue. 3 (March 2025)
1. Rajkiya Engineering College (REC), Department of Civil Engineering, Akbarpur – 224 122, Uttar Pradesh, India
2. Invertis University, Department of Civil Engineering, Bareilly – 243 123, Uttar Pradesh, India
3. Invertis University, Department of Mechanical Engineering Bareilly – 243 123, Uttar Pradesh, India
Abstract
Black cotton soil (BCS) is a challenging soil type found in various areas and is known for its poor engineering characteristics, making it unsuitable for construction applications. Typically, BCS stabilization involves using ordinary Portland cement (OPC) and lime additive. However, producing these stabilizers is energy-intensive and results in significant CO2 emissions. This study investigates the effect of discrete polypropylene fibers on BCS’s strength and swelling behaviour. Fibers of 6 mm and 12 mm lengths are mixed with the soil in various percentages (0.0625%, 0.125%, 0.25%, 0.50% and 1% by weight). Tests, such as heavy compaction, unconfined compressive strength (UCS), shear strength parameters (c and f), California bearing ratio (CBR) and swelling pressure are conducted. Results show significant improvements in UCS, shear strength, CBR, axial strain at failure, reduced post-peak strength loss and swelling pressure. Scanning electron microscopy (SEM) images reveal that surface friction and interlocking at the soil-fiber interface are key factors in the enhanced properties. Multiple linear regression models predict soaked CBR and UCS based on fiber content and compaction characteristics.
Keywords
Compaction, California bearing ratio. Unconfined compressive strength, Triaxial compressive test, Polypropylene fibers, Subgrade soil
References
- Singh, D., V. Kumar and R.P. Tiwari. 2023. Stabilization of expansive soil using cementitious materials with non-woven geotextile. Transportation Infrastructure Geotech., 11: 1202–1230.
- Pateriya, I.K. 2016. Measures suggested for achieving economy in the construction of rural roads in PMGSY. A National Conference on Fifteen years of Pradhan Mantri Gram Sadak yojana (FYPMGSY). Roorkee. Proceedings, pp 1-10.
- Vittal, U.K.G. and I.K. Pateriya. 2016. Using locally available materials in road construction– problems and possibilities. A National Conference on Fifteen years of Pradhan Mantri Gram Sadak yojana (FYPMGSY). Proceedings, pp 1-10.
- Ingle, G.S. and S.S. Bhosale. 2013. Geosynthetics reinforced flexible pavement: Gateway of the sustainable pavement. Indian Highways. 41(6): 6-15.
- Koerner, R.M. 2022. Designing with geosynthetics (6th edn). Xlibris Corporation, U.S.A.
- Yetimoglu, T., M. Inanir and O.E. Inanir. 2005. A study on bearing capacity of randomly distributed fiber-reinforced sand fill overlying soft clay. Geo-textiles Geomembranes. 23(2): 174-183.
- Sengul, T., N. Akray and Y. Vitosoglu. 2023. Investigating the effects of stabilization carried out using flyash and polypropylene fiber on the properties of highway clay soils. Constr. Building Mater., 400: 132590.
- Wang, X., et al. 2023. Globally nitrogen addition alters soil microbial community structure, but has minor effects on soil microbial diversity and richness. Soil Biol. Biochem., 179: 108982.
- Saberian, M., et al. 2023. Mechanical properties of polypropylene fibre reinforced recycled concrete aggregate for sustainable road base and subbase applications. Constr. Building Mater., 405: 133352.
- Tang, C., et al. 2007. Strength and mechanical behavior of short polypropylene fiber reinforced and cement stabilized clayey soil. Geotextiles Geomem-branes. 25(3): 194-202.
- Yazici, M. F. and S.N. Keskin. 2024. Experimental investigation of the mechanical properties of poly-propylene fiber-reinforced clay soil and development of predictive models: Effects of fiber length and fiber content. Arabian J. Sci. Eng., 49: 13593–13611.
- Gul, N. and B.A. Mir. 2022. Parametric study of glass fiber reinforced fine-grained soil with emphasis on microstructural analysis. Int. J. Geotech. Eng., 16(6): 716-728.
- Gul, N. and B. A. Mir. 2023. Performance evaluation of silty soil reinforced with glass fiber and cement kiln dust for subgrade applications. Constr. Building Mater., 392: 131943.
- Singh, H.P. 2011. Strength characteristics of flyash reinforced with geosynthetic fiber. Int. J. Earth Sci. Eng., 4(6): 969-971.
- Chore, H.S., et al. 2011. Performance evaluation of polypropylene fibers on sand-flyash mixtures in highways. J. Civil Eng., 39(1): 91-102.
- Consoli, N.C., M.A.A. Bassani and L. Festugato. 2010. Effect of fiber-reinforcement on the strength of cemented soils. Geotextiles Geomembranes. 28(4): 344-351.
- Botero, E., et al. 2015. Stress-strain behaviour of a silty soil reinforced with polypropylene terephthalate (PET). Geotextiles Geomembranes. 43(4): 363-369.
- Park, S.S. 2009. Effect of fiber reinforcement and distribution on unconfined compressive strength of fiber-reinforced cemented sand. Geotextiles Geo-membranes. 27(2): 162-166.
- Shao, W., et al. 2014. Experimental investigation of mechanical properties of sands reinforced with discrete randomly distributed fiber. Geotech. Geol. Eng., 32(4): 901-910.
- Prabakar, J. and R.S. Sridhar. 2012. Effect of random inclusion of sisal fiber on strength behaviour of soil. Constr. Building Mater., 16(2): 123-131.
- Rao, S.V.K. and A.M.A. Nasr. 2012. Laboratory study on the relative performance of silty-sand soils reinforced with linen fiber. Geotech. Geol. Eng., 30(1): 63-74.
- Ahmad, F., F. Bateni and M. Azmi. 2010. Performance evaluation of silty sand reinforced with fibers. Geotextiles Geomembranes. 28(1): 93-99.
- Kumar, M.T.P. and R. Sridhar. 2013. Effect of coir mat and coir fiber reinforcement on shear strength of dry sand. Indian Geotechnical Conference. Roorkee. Proceedings, pp 1-5.
- IS 2720-1. 1983. Methods of test for soils. Part 1: Preparation of dry soil samples for various tests. Bureau of Indian Standards, New Delhi.
- IS 1498. 1970. Classification and identification of soils for general engineering purposes. Bureau of Indian Standards, New Delhi.
- Koerner, R. M. 2005. Designing with geosynthetics (vol. 796). Pearson Prentice Hall, Upper Saddle River, New Jersey, USA.
- Jadhao, P.D. and P.B. Nagarnaik. 2008. Performance evaluation of fiber reinforced soil-flyash mixtures. 12th International Conference of International association for computer methods and advances in geomechanics. Goa, India. Proceedings, pp 1-6.
- Girija, K.M. 2013. Behaviour of randomly distributed fiber-reinforced soil. Int. J. Res. Eng. Tech., 4(2): 456-458.
- Ramasubbarao, G.V. and G.S. Sankar. 2013. Predicting soaked CBR value of fine grain soils using index and compaction characteristics. Jordan J. Civil Eng., 7(3): 354-360.
- Montgomery, D.C., E.A. Peck and G.G. Vining. 2003. Introduction to linear regression analysis (3rd edn). Wiley, Singapore.
- Singh, D. and V. Kumar. 2021. Stabilization of black cotton soil by using RBI grade-81: a review. Indian geotechnical and geoenvironmental engineering conference (IGGEC 2021). Singapore. Proceedings, vol. 1, pp 53-59.
- Singh, D., V. Kumar and R.P. Tiwari. 2022. Stabilization of expansive soil: A review. International Conference on Innovation in smart and sustainable infrastructure. Singapore. Proceedings, pp 251-264.
- Singh, D., V. Kumar and R.P. Tiwari. 2023. Assessment of effect of glass fiber on the geotechnical properties of black cotton soil. IOP Conf. Series: Mater. Sci. Eng., 1273(1): 012019.
