Mechanical behaviour of fly-ash-treated expansive soil

Mir, BA and Sridharan, A (2019) Mechanical behaviour of fly-ash-treated expansive soil. In: Proceedings of the Institution of Civil Engineers: Ground Improvement, 172 (1). pp. 12-24.

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Abstract

A major source of electrical energy is thermal power, which results in large quantities of coal ashes. Fly ash, which is produced from the combustion of pulverised coal, has an important place among industrial by-products. Currently, in India, more than 180 Mt of fly ash is being generated annually, posing the dual problem of environmental pollution and difficulty in disposal. This calls for establishing strategies to use the product as an engineered construction material in geotechnical applications for which the mechanical behaviour of soil-fly-ash mixes is an important consideration. In this study, high-calcium (class C) and low-calcium (class F) fly ashes in different proportions by weight were added to expansive soil to evaluate the effect of fly ashes on the strength behaviour of soil-fly-ash mixtures. Compacted clay-fly-ash samples were cured for 7 and 28 d and subjected to unconfined compression tests. It was found that 20 of class C fly ash is the optimum quantity to improve the characteristics of expansive soil, compared with 60 of class F fly ash. The main objective of the study was to illustrate the beneficial effects of fly ashes on the mechanical behaviour of fly-ash-treated expansive soil.

Item Type:	Journal Article
Publication:	Proceedings of the Institution of Civil Engineers: Ground Improvement
Publisher:	ICE Publishing
Additional Information:	The copyright for this article belongs to ICE Publishing.
Keywords:	C (programming language); Calcium; Coal; Coal combustion; Compression testing; Fly ash; Geotechnical engineering; Soils, Beneficial effects; Class f fly ashes; Different proportions; Environmental pollutions; Geotechnical application; Industrial by-products; Mechanical behaviour; Unconfined compression tests, Coal ash, expansive soil; fly ash; geotechnical engineering; mechanical property; soil amendment; soil strength; waste disposal; waste management, India
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	29 Nov 2022 05:59
Last Modified:	29 Nov 2022 05:59
URI:	https://eprints.iisc.ac.in/id/eprint/78072

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