International Research Journal of Engineering and Technology (IRJET) Volume: 09 Issue: 11 | Nov 2022
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e-ISSN: 2395-0056 p-ISSN: 2395-0072
Durability Studies of Surface Modified Coir Geotextiles Slomo Anna Daniel1, Shahna A Rahman2, Ben Johnson Paul3, Nameer Mohamed Naseer4 Prof. Basil Jaimon 5 UG Students, MA College of Engineering, Kerala, India Professor, Dept. of Civil Engineering, MA College of Engineering, Kerala, India ---------------------------------------------------------------------***--------------------------------------------------------------------1,2,3,4
5 Assistant
Abstract - The fabrics known as Coir Geotextiles are
highways, embankments, canals, and other structures. Environmental awareness is increasing constantly, which stimulates research and results in the creation of more ecofriendly products. The production of geotextiles using natural, biodegradable fibres is the newest development in geosynthetics.
comprised of coir yarn and are entirely natural and biodegradable. Major applications of them include erosion control, separation, filtration, and strengthening. They are frequently employed in the building of roads, embankments, soil stabilisation against erosion through vegetation, and protection of the banks of rivers, canals, and lakes. These are subjected to various chemical and environmental conditions. Hence their durability is a matter of concern. In this project, natural rubber latex is provided as surface modification of coir geotextile. The initial tensile strength of the modified and unmodified coir geotextiles was tested. Modified and unmodified coir geotextiles were buried in laterite soil, submerged in plain water and in solutions of fertilizers (urea and factamfose) and exposed to natural environmental conditions. After 60 days, tensile strength of these samples was evaluated. The initial strength of coir geotextile has increased by 4.797% after modification with natural rubber latex. Urea has more effect on the degradation of coir geotextile than factamfose. An increase of 12.85% in strength for modified geotextile than the unmodified geotextile in urea solution implies that latex modifications are more effective when geotextiles are to be used in alkaline conditions. The degradation rate is slightly more for unmodified geotextile than the modified geotextile by 0.5% for those buried in laterite soil as the acidic nature of the soil deteriorates the latex modification. The modification was effective in protecting the geotextile from UV rays. The findings point to the potential of appropriately surface-modified coir geotextiles for prolonged use in adverse environment.
The thickest and most durable natural fibre is coir, which is made entirely of natural materials. The raw material for the coir business is provided by the coconut palm, also known as Kalpavriksha.It has the highest tearing strength of any natural fibre, even in extremely slick situations. Therefore, coir geotextiles, or net fabrics made of coir fibres, are frequently employed in the building of roads, embankments, soil stabilisation against erosion through vegetation, and protection of the banks of rivers, canals, and lakes. Due to its rough texture, it has a propensity to absorb moisture. With the progression of degradation, the capacity of coir to absorb moisture grows even more. The surface of the fiber's small pores and fissures allow moisture to enter, swelling the fibre as a result. Under normal pH, temperature, and nutritional conditions, this makes the cell wall weaker and opens it up to microbial attack. Natural geotextile can have its surface modified to stop moisture absorption and increase its lifespan.
1.1 Materials Latex modified coir geotextile is a new genre of material with superior mechanical properties of coir fibre and durability of natural latex. 40sqm Coir Geotextile was collected from Shertallai Thaluk Small Scale Coir Matting Producers’ Co operative Society Ltd and sent to a factory at Pathirappally for latex coating The latex was sprayed over the surface of the geotextile sample, which had been spread out on the ground, using a spray gun and compressor. It was sprayed on one side and then dried by exposing to sun for around two hours. After that, second surface was also modified similarly, and both surfaces are allowed to pass through a drier at 100 0 C.
Key Words:
Coir, Natural Fibre, Geotextile, Surface Modification, submerged, Fertilizer effect, laterite soil effect.
1. INTRODUCTION Geotextiles, geogrids, geonets, geomembranes, geosynthetic clay liners, geofoam, geocells, and geocomposites are all examples of the planar, polymeric heterogeneous class of materials known as geosynthetics. They are becoming more popular in civil engineering because they can be utilised for containment, drainage, filtration, reinforcement, and separation. Geotechnical and geoenvironmental engineering is the primary field in which geosynthetics are used. A versatile and affordable ground modification material, geotextile consisting of synthetic polymer or naturally derived synthetic composite polymer is used to build
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