Impact of carpet waste fibre addition on swelling properties of compacted clays

Mirzababaei, M. and Miraftab, Mohsen and Mohamed, Mostafa H. A. and McMahon, Paul H. (2013) Impact of carpet waste fibre addition on swelling properties of compacted clays. Geotechnical and Geological Engineering, 31 (1). pp. 173-182. ISSN 0960-3182

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Abstract

Municipalities and recycling and environmental authorities are concerned about the growing amount of carpet waste produced by household, commercial and industrial sectors. It is reported that 500,000 tonnes of carpet waste fibre are plunged into landfills annually in the UK. In the United States of America, around 10 million tonnes of textile waste was generated in 2003. In geotechnical engineering, expansive clay soils are categorised as problematic soils due to their swelling behaviour upon increase in the moisture content. The problematic nature of such soils is intensified with the increase in the plasticity index. This paper presents results of a comprehensive investigation into utilisation of carpet waste fibres in order to improve the swelling characteristics of compacted cohesive soils. Therefore, two different clay soils with markedly different plasticity indices (i.e. 17.0 and 31.5%) were treated with two different types of carpet waste fibre. Waste fibres were added to prepare specimens with fibre content of 1, 3 and 5 % by dry weight of soil. Soil specimens with different dry unit weights and moisture contents were prepared so as to the swelling behaviour of fibre reinforced compacted clays is completely attained under various scenarios. The results indicated that the behaviour of the fibre reinforced soils seems highly dependent on the initial compaction state and secondary on the moisture content. It was found that the swelling pressure drops rapidly as the percentage of fibre increases in samples prepared at the maximum dry unit weight and optimum moisture content. Reducing the dry unit weight, while maintaining constant moisture content or increasing the moisture content at constant dry unit weight was found to reduce the swelling pressure.

Item Type: Article
Additional Information: Full text of this article is not available in this repository. The final publication is available at Springer via http://dx.doi.org/10.1007/s10706-012-9578-2.
Uncontrolled Keywords: Carpet waste fibre; Compacted clay soils; Fibre pockets; Fibre reinforced soils; Swelling pressure
Subjects: T Technology > T Technology (General)
Divisions: University of Bolton Research Centres > Institute for Materials Research and Innovation
Depositing User: Sarah Taylor
Date Deposited: 01 Dec 2015 15:28
Last Modified: 01 Mar 2016 10:47
Identification Number: 10.1007/s10706-012-9578-2
URI: http://ubir.bolton.ac.uk/id/eprint/776

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