The utilisation of fly ash for ground improvement: a sustainable construction of embankment

Mahvash-Mohammadi, Siavash (2017) The utilisation of fly ash for ground improvement: a sustainable construction of embankment. Doctoral thesis, University of West London.

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Abstract

In this work, the effect of Fly Ash (FA) on fine sand and its suitability as a civil engineering material for construction of embankments is investigated. The thesis is concerned with the role of FA content in stabilised soil physical characteristics. The aim of the study presented in this thesis is to examine the suitability of class F FA as a construction material in geotechnical engineering projects. This is achieved through combination of experimental analysis and numerical simulations. Experimental analyses (in accordance with British Standards) were conducted by applying compaction, particle size distribution, bearing capacity tests and resilient modulus, derived from California Bearing Ratio (CBR), while numerical simulation was carried out using finite element and lagrangian finite difference analysis. For the purpose of this thesis, all the samples were tested before and after being treated with four different curing durations, 1 week, 2 weeks, 4 weeks and 8 weeks, and three variations of FA content, 5%, 10% and 15%. The samples were also mixed with 3% of cement as the activator. In this thesis, the research aims and objectives are stated in the introduction chapter, followed by the literature review on FA, soil stabilisation and ground improvement. The research methodology and details about the materials used, are then presented and discussed. The numerical simulations and results are finally presented. FA stabilized samples, with an accurate mixture, were shown to have lower dry densities while producing higher strengths than the sand. Potentially making it an effective material suitable for use in embankment construction and projects alike.

Item Type: Thesis (Doctoral)
Uncontrolled Keywords: Fly Ash; Ground Improvement; Soil Stabilisation
Subjects: Construction and engineering > Civil and environmental engineering
Construction and engineering > Civil and structural engineering
Depositing User: Kevin Sanders
Date Deposited: 21 Mar 2018 08:57
Last Modified: 21 Mar 2018 08:57
URI: http://repository.uwl.ac.uk/id/eprint/4754

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