Studies on Effect of Different Environmental Conditions on CBR of Black Cotton Soil Reinforced with Coir FibreAuthor : Akhileshwar Swami, Pushpendra Kumar Kushwaha and Mohit Gangwar
Volume 7 No.1 January-June 2018 pp 20-28
Expansive soil covers nearly 20 percent of the land mass in India. These soils are known to possess weak properties due to the presence of clay minerals known as “Montmorillonite”. Typical behaviour of soil results in the failure of structures, in form of settlements, cracks etc. Thus it is important to remove the existing weak soil and replace it with non-expansive soil or to improve the properties of weak soil by stabilization. Soil reinforcement is a technique that can be used to improve the engineering characteristics of expansive soils. Use of natural fibres to reinforce soil is an old and ancient idea. Randomly distributed fibre reinforced soil have recently attracted growing attention in geotechnical engineering. The present dissertation aims to study the effect of different environmental conditions on performance of coir fibres included in black cotton soil to enhance its strength and reduce the swelling behaviour. Coir fibre is known as a biodegradable material that tends to decay under extreme environmental conditions such as in contaminated and polluted water, in getting contact with the leachate, in alternate cycles of wetting and drying, also in alternate cycles of freezing and thawing and so on. In general, life of coir fibre in soil is expected to 8-10 years. Therefore under different environmental condition it may degrade fast. The gain in soil strength or decrease in swelling might be lost. This aspect is not studied so far. Hence in this work this is attempted. The work in the project is experiment based, California bearing ratio of soil is an important soil strength parameter used in design of pavements. Effect of some different possible environmental conditions on CBR of expansive soil improved by coir fibre reinforcement will be studied experimentally in the present work.
Expansive Soil, Soil Stabilization, Fiber Reinforcement, Coir Fiber, CBR
 Ghavami K, Filho R, Barbosa P., “ Behaviour of composite soil reinforced with natural fibres”, Cement Concrete Compos, Vol. 21, pp. 39 – 48, 1999.
 Bujang I. Z., Awang M. K. and Ismail A. E., “Study on the Dynamic Characteristic of Coconut Fibre Reinforced Composites”, Regional Conference on Engineering Mathematics, Mechanics, Manufacturing & Architecture, Malaysia, 2007.
 Chauhan Mahipal Singh, Mittal Satyendra, Mohanty Bijayananda, “Performance evaluation of silty sand subgrade reinforced with fly ash and fibre”, 2008.
 Guntur, Suresh K., Padmavathi V., Sultana Apsar , “Experimental study on stabilization of black cotton soil with stone dust and fibres”, IGC 2009.
 Ahmad F, Bateni F, Azmi M., “Performance evaluation of silty sand reinforced with fibers”, Geotext Geomember, Vol. 28, No. 93, pp. 9, 2010.
 Chaple Parag M and Dhatrak A I., “Performance of Coir fibre Reinforced Clayey Soil”, The International Journal of Engineering and Science (IJES), Vol. 2, No. 4, pp. 54-64, 2010.
 H.N Ramesh., K.V. Krishna, H.V. Manoj Mamatha, “Effect of Lime-Coir Fibre on Geotechnical Properties of Black Cotton Soil”, Indian Geotechnical Conference – 2010, GEOtrendz, pp. 16–18, 2010.
 Hazirbaba Kenan and Gullu Hamza, ,California, “Bearing Ratio improvement and freeze–thaw performance of fine-grained soils treated with geofibre and synthetic fluid”, Cold Regions Science and Technology, Vol. 63, pp. 50–60, 2010.
 Hassan Wan Hasmida Binti Wan, “Strength Characteristic of Soft Soil Reinforced With Coir Fibres”, 2010.
 Hegde R. A. and Daware S.N., “Effect of Alternate Wetting and Drying on Laterite and Their Engineering Behaviour”, Indian Geotechnical Conference – 2010, pp. 16–18, December 2010.
 Jamellodin Z, Talib Z, Kolop R, Noor N., “The effect of oil palm fibre on strength behaviour of soil”, In: 3rd SANREM conf, kota kinabalu, Malaysia, pp. 3–5 August, 2010.
 Ayothiraman R. and Meena Ablish Kumar, “Improvement of Subgrade Soil with shredded waste tyre chips”, Proceedings of Indian Geotechnical Conference Kochi (Paper No. H- 033), pp. 15-17, December 2011,
 Dixit Savita and Verma Preeti, “The effect of surface modification on the water absorption behaviour of coir fibres”, Pelagia Research Library. Advances in Applied Science Research, Vol. 3, No. 3, pp. 1463-1465, 2012.
 Hejazi Sayyed Mahdi, Zadeh Mohammed Sheikh, Abtahi Sayyed Mahdi and Zadhoush Ali, “A simple review of soil reinforcement by using natural and synthetic fibres”, Construction and Building Materials, Vol. 30, pp. 100-116. 2012.
 Amadi A. A, Eberemu, A. O., Momoh, O. H., “Use of Coir Fibre Reinforcement Technique to Improve Strength of Cement Kiln Dust Treated Black Cotton Soil Subgrade”, Geosynthetics, Long Beach, California, pp. 1-4, April, 2013.
 Chavan Apurva J, “Use of plastic waste in flexible pavements”, International Journal of application or innovation in Engineering and Management, Vol. 2, No. 4, April 2013.
 Ghazavi Mahmoud , Roustaei Mahya, “Freeze–thaw performance of clayey soil reinforced with geotextile layer”, Cold Regions Science and Technology, Vol. 89 , pp. 22–29, 2013.
 Hambirao Ghatge Sandeep , Rakaraddi P.G., “Soil Stabilization Using Waste Shredded Rubber Tyre Chips”, IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) e-ISSN: 2278-1684,p-ISSN: 2320-334X, Vol. 11, No. 1 Ver. V Feb., pp. 20-27, 2014.