Abstract
With rapid advancements in technology globally, the use of plastics such as polyethylene bags, bottles etc. is also increasing. The disposal of thrown away wastes pose a serious challenge since most of the plastic wastes are non-biodegradable and unfit for incineration as they emit harmful gases. Soil stabilization improves the engineering properties of weak soils by controlled compaction or adding stabilizers like cement, lime etc. but these additives also have become expensive in recent years. This paper presents a detailed study on the behavior and use of waste plastic in soil improvement. Experimental investigation on reinforced plastic soil results showed that, plastic can be used as an effective stabilizer so as to encounter waste disposal problem as well as an economical solution for stabilizing weak soils. Plastic reinforced soil behaves like a fiber reinforced soil. This study involves the investigation of the effect of plastic bottle strips on silty sand for which a series of compaction, direct shear and California bearing ratio (CBR) tests have been performed with varying percentages of plastic strips and also with different aspect ratios in terms of size. The results reflect that there is significant increment in maximum dry unit weight, Shear Strength Parameters and CBR value with plastic reinforcement in soil. The quantum of improvement in the soil properties depends on type of soil, plastic content and size of strip. It is observed from the study that, improvement in engineering properties of silty sand is achieved at 0.4% plastic content with strip size of (15 mm × 15 mm).
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Times of India, article on April 30, 2015 http://timesofindia.indiatimes.com/home/environment/pollution/60-cities-generate-over-15000-tonnes-of-plastic-waste-per-day/articleshow/47110633.cms
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Peddaiah, S., Burman, A. & Sreedeep, S. Experimental Study on Effect of Waste Plastic Bottle Strips in Soil Improvement. Geotech Geol Eng 36, 2907–2920 (2018). https://doi.org/10.1007/s10706-018-0512-0
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DOI: https://doi.org/10.1007/s10706-018-0512-0