Indian Journal of Geosynthetics and Ground Improvement
Year : 2018, Volume : 7, Issue : 1
First page : ( 3) Last page : ( 8)
Print ISSN : 2277-5625. Online ISSN : 2277-5633.

Effect of Randomly Oriented Synthetic Fibre on Clay of High Compressibility

Sireesha G., Reddy C.N.V. Satyanarayana

College of Engineering, Andhra University, Visakhapatnam, India

Online published on 13 February, 2018.

Abstract

High compressible clays pose problems when used as construction material or to structures that are founded in them due to low strength, high compressibility and more often due to their swell shrink behaviour. If such soils are encountered during construction, they are to be improved before they are used as construction/foundation material. Improving engineering properties of soil using synthetic and metallic strips, sheets, meshes and fibre is being tried over the last two decades. Among the various reinforcing materials, fibre reinforcement in soils offers the advantage of isotropic improvement of soil. Hence, in the present study, an experimental program is undertaken to evaluate the effect of randomly oriented polyester fibre on clay of high compressibility. The high compressible clay proposed for stabilisation is mixed with varying proportions of fibre (0.5% to 2%) in increments of 0.5% of polyester fibre (by weight) of 6 mm and 12 mm lengths. The compaction and strength characteristics are determined for fibre reinforced clay. The effect of polyester fibre on swelling of high compressible clay is evaluated by determining swell pressures of fibre reinforced clay of high plasticity as the free swell index is greater than 50%. Significant reduction in swell pressure is observed by stabilisation of clay by polyester fibre of 0.5%.

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Keywords

CBR, Shear parameters, Fibre, Compaction Characteristics, high compressible clay.

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