Application of Recron 3S Fibre in Improving Silty Subgrade Behaviour (original) (raw)
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Improvement in Soil Subgrade Using Natural Fibre (Kenaf and Coir Fibre)
2021
India has one of the largest road networks in the world. Around 20% land area of India is covered with soils having low California bearing ratio (CBR) and shear strength values. Pavements laid over such type of soil lead to continuous deformation as a result of which cracks are developed. It increases the maintenance cost and disrupts traffic services. From past decades, various researchers have tried to overcome such type of problems either by using traditional techniques like lime, cement, mechanical stabilization or by using modern techniques like geosynthetics or natural fibres, etc. The present paper deals with the use of natural fibres (kenaf and coir) as a reinforcing material to assess the improvement in strength characteristics of unreinforced soil. The soaked CBR and maximum dry density (MDD) of virgin soil were 2.11% and 1.823 gm/cc, respectively. Kenaf and coir fibre were cut in length of 15 mm and randomly mixed with the unreinforced soil in different percentages (i.e.,...
Influence of Recron 3S Fibres on Consolidation Behaviour of Expansive Black Soils
Civil Engineering and Architecture, 2024
The soils that make up approximately 1/5 th of the Indian sub-continent are expansive soils, which are the most difficult to work with. These soils swell and shrink, causing problems in the foundation structures. These problems can be resolved by several modification techniques. The present experimental study is to reduce foundation failures by reinforcing the fibres to the expansive soils. Two soils having extreme liquid limits of 58% and 85% in the range were selected and reinforced with Recron 3S fibres. The 1-D consolidation test was conducted for different energy levels with seating pressure of 6.25 kPa to 1600 kPa, which were compacted at MDD and OMC for both natural and reinforced soils. The findings of C V were estimated for various pressure ranges of plain and fibre-reinforced soils. The magnitude of C V increased with the addition of fibres and with an increase in pressure when compared with plain soils. The increase in Cv value for the fibre Blended expansive soils induces a significant change in the magnitude of elastic and plastic settlement of soils (the time rate of the settlement gets reduced), thereby achieving economy in terms of time and controlled engineering behaviour.
IRJET- INFLUENCE OF LIME, RHA & COIR FIBRE ON STRENGTH PROPERTIES OF SUBGRADE SOIL
IRJET, 2020
In India, one-fifth of our territory zone is secured by black cotton soil which is otherwise called extensive soil. These soils are generally found in parched and semi-dry regions. These soils are seen as profoundly dangerous in constructional exercises. It makes serious harm to the structure in view of its substitute swelling and shrinkage nature. This occurs because of exchange drying and wetting of soil. To evade these conditions, soil must be stabilized and strength should be expanded .Transfer of strong waste on the land fill can be limited if the waste is having attractive properties with the end goal that they can be used for different geotechnical application viz. land recovery, development of bank and so forth. There are a few techniques utilized for improving geotechnical properties of tricky soils that incorporates densification, seepage, considerations, and stabilizations. In view of literature, lime, rice husk ash and coir fiber are more affordable and compelling to soil stabilizations.
EFFECT OF COIR FIBRES ON CBR STRENGTH AND LOAD BEARING CAPACITY OF GUWAHATI SOIL SUBGRADE
Improvement of strength of the soil may be undertaken by a variety of ground improvement techniques like stabilization of soil, adoption of reinforced earth techniques etc. Reinforced earth technique is considered as an effective ground improvement method because of its cost effectiveness, easy adaptability and reproducibility. This paper is an experimental study on the utilization of coir fibres on soil subgrade. Coir fibres provide a reinforcement action to the sub-grade soil. Coir fibres are natural material obtained from coconut husk which is commonly seen in India. Coir fibres of varying length from 38.1mm and 76.2 mm at the rate of 0.25 %, 0.50% and 0.75%, of total weight of soil were mixed with the soil. Soil is compacted to Modified Proctor's maximum density with low percentage of reinforcement (0 to 0.75% by weight of sun-dried soil). CBR tests were conducted on unreinforced as well as fibre-reinforced soil to investigate the strength characteristics of fibre-reinforced soil and unreinforced soil. The test results reveal that the inclusion of randomly distributed coir fibres in soil shows an increasing trend in CBR value/strength of soil.
SOIL IMPROVEMENT USING COIR FIBER: A CASE STUDY
IAEME PUBLICATION, 2021
A good transportation system is an essential requirement of any nation. It not only makes the life of the people more convenient but also results in the development of the nation as a whole. Construction and maintenance of roads require proper engineering studies and large capital investment. However, poorly constructed roads not only have lesser durability but also makes riding on the road uncomfortable increasing the operation and maintenance cost of vehicles. Suitable subgrade availability is one of the prime factors while finalizing the road alignment after engineering surveys for road alignment. But sometimes while finalizing the road alignment tradeoff is inevitable between economy and availability of suitable subgrade. Changing the alignment to avoid a weak and unstable subgrade may lead to more construction and/or vehicle operation cost. This is truer especially when a non-suitable subgrade exists for a shorter length along the alignment. In such a situation, the best remedy is to adopt soil stabilization techniques for the non-suitable soil to improve its engineering properties hence make it suitable as the subgrade material. Soil such as clayey soil is an unsuitable subgrade soil mainly because of its large swelling and shrinkage properties. Hence it needs to be stabilized before adopting it as subgrade soil. Present research work deals with the stabilization of clayey soil using coir fiber. Light compaction test and California Bearing Ratio (CBR) test are conducted on the mixture of clayey soil and coir fiber to know the effect of coir fiber in improving the engineering properties of clayey soil. The clayey soil is collected from the Bilasipara region of Dhubri district, Assam state, India. Hence this research work is helpful for infrastructure development activities in the northeastern region of India.
Improvement of Compressive Strength of Soil by Using Jute Fiber Waste
To attain desirable strength of soil, soil reinforcement has been playing a pivotal role since many decades. Although there are many well established methods to reinforce the soil, but now-a-days people are looking for low-cost reinforcing materials. In Bangladesh jute waste is not being used effectively, although jute production is quite good in amount. From this point of view, in this study jute fiber is selected as reinforcing material and focused on improvement of compressive strength of soil with this. Varying proportions of Jute fiber as 1%, 2%, 3% and 4% have been mixed with soil to make the samples to be tested. The result indicated that the sample prepared with 3% of jute fiber gives the highest value in Unconfined Compressive Strength (UCS) test, and adding more than 3% of jute fiber tends to decrease the UCS value. As this study has been done keeping in mind about the embankment construction process in the coastal zones of Bangladesh, where grass turfing is done to protect soil from erosion and inorganic fertilizer is used to grow up the grass which has long term adverse effect on environment. On the other hand jute is 100% biodegradable, when it comes to contact of moist soil, after a certain period it acts as natural fertilizer that helps to grow up the grass and make the root of grass stronger to hold the soil.
IRJET, 2021
of subgrade soil. Subgrade strength is determined by CBR (California Bearing Ratio) and the results are expressed as CBR value in percentage. The strength of soil can be improved by suitably adding stabilizing agent resulting in reduction of the thickness of the layer. Engineering properties of selected samples such as unconfined compressive strength, proctor density with corresponding optimum moisture content and California Bearing Ratio were studied for the untreated samples of soil. Coal ash was added as stabilizing agent on 0%, 10%, 20%, 30%, 40%, 50% and 60%, whereas bagasse ash and groundnut shell ash was added as stabilizing agent with 0%, 2%, 4%, 6%, 8%, 10% and 12%.