Application of Hemp Fibre for Subgrade Improvement | |
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( Volume 3 Issue 5,May 2017 ) OPEN ACCESS | |
Author(s): | |
Dipanjan Hazra, Joyanta Maity, Bikash Chandra Chattopadhyay | |
Abstract: | |
For transportation development in India huge amount construction of roads are being made through different schemes. For such constructions, requirement of fill material for subgrade is enormous. But in many cases available soils near construction sites are found to be weak in strength and of high compressibility, after routine compaction. Reinforced soil structure is an effective technique for increasing the strength of soil. Reinforced soil is widely used as the construction material in formation of subgrade for roads, railway tracks, airfields and in retaining walls or abutments. Fibre-reinforced soil is becoming a viable soil improvement method for geotechnical engineering problems including stabilization of shallow slopes, construction of new embankments with marginal soils, reduction of shrinkage cracking in compacted clay liners and reinforcement of roadway subgrades. However, extensive research is needed to study the behaviour of randomly mixed Hemp as a natural fibre with soil before their application in practice. This paper presents the stabilization of soil using randomly distributed Hemp fibre at varying lengths and percentages by weight of soil. Compaction tests and California Bearing Ratio (CBR) tests were conducted to investigate the behaviour of soil mixed with Hemp fibre. From the test results, it was observed that with the increase in percentage of Hemp fibre in soil, maximum dry density decreases whereas optimum moisture content increases. Further, the CBR value of the composite at OMC, increased with increase in percentage of Hemp fibre. |
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