Abstract
Expansive soils like clays undergo swelling that can both be detrimental and acceptable in different applications. In the Northern part of India, especially Delhi region, natural soils containing clays & clayey sands support most of the buildings. Mechanically stabilized clays mixed with sand are used for local earthwork construction such as roads and landfills. Exact understanding of the swelling behaviour of such soils is a pre-requisite before the start of any construction projects. In this paper the swelling behaviour of clayey soil reinforced with geocell & Jute fibres has been presented. The laboratory investigations include one dimensional swelling tests using California Bearing Ratio (CBR) mould to study the swelling properties for different mix proportions. The maximum decrease in swelling potential of Geocell reinforced specimens was observed at fibre content of 0.80 percent and 40mm fibre length, beyond which increase in the swelling potential and swelling pressure has been observed. With this optimal reinforcement, a reduction of 71.24 percent in swelling and 41.10 percent in swelling pressure has been observed as compared to unreinforced soils. The study provides a solution towards the treatment of expansive soils before starting any construction activity over such soils and a step towards mitigating disasters related to infrastructure facilities grounded on expansive soils. Doi: 10.28991/cej-2021-03091728 Full Text: PDF
Highlights
Expansive soil is one that undergoes large volumetric changes in response to changes in moisture content
The results show that geocell and jute fibres are effective as reinforcement to control swelling of the expansive soil
Geocell reinforcement alone resulted in a 28.76 % reduction in swelling and a 12.34 % reduction in swelling pressure;
Summary
Expansive soil is one that undergoes large volumetric changes in response to changes in moisture content. Malekzadeh and Bilsel (2012) [23] reported swelling and compressibility of expansive soils reinforced with polypropylene fibre evaluated and concluded that using polypropylene fibres with expansive soils may be an effective method to restrain swelling potential and the compressibility EIsharief et al [24] presented results of an experimental study to understand the swelling behavior of two expansive soils and to develop few models to predict swelling pressure and concluded that the swelling pressure increases with the decrease in moisture and increase in soil suction It decreased with the increase in liquidity index. It can resist rotting and heat as well [39]
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