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Title: Studies on the Potential of Coir Reinforced Structures
Authors: Sheebha, K P
Sobha, S
Paul, Santha Leah
Devi, D Rema
Issue Date: Jan-2000
Publisher: NISCAIR-CSIR, India
Abstract: Geotextiles made of natural fibres are increasingly finding a place in erosion control, but not for soil reinforcement application, in spite of the fact that strong fibres like coir which have a very high lignin content can be effectively made use of provided they are given suitable treatment. This paper deals with potentialities of coir products like coir ropes, coir felt and grids for improving weak subsoil. The effectiveness of coir needled felt on clay beds were examined using CBR type penetration tests on a kaolinite clay bed at fast and slow rates of strain with a view to comparing them with sand blankets used for accelerating consolidation. The needled felt was also strengthened by nylon netting and coir grids. Limited cyclic wetting and drying tests performed on these products showed that the strength is not significantly reduced by these tests. It is concluded that needled felt is a good seating layer to economise on sand blankets for clay formation on which embankments can be constructed at a fast rate as there is little possibility of undrained failure. Light bituseal and cement-PVA coating help to improve both the resistance and durability of the coir composites.
Page(s): 55-62
ISSN: 0975-1084 (Online); 0022-4456 (Print)
Appears in Collections:JSIR Vol.59(01) [January 2000]

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