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Economic assessment of use of pond ash in pavements

Sarkar, Raju; Dawson, Andrew

Authors

Raju Sarkar

Andrew Dawson



Abstract

The paper introduces a new type of industrial waste-based subbase material which can replace conventional subbase material (CSM) in pavement construction. Utilisation of this industrial waste, namely pond coal ash produced from a thermal power plant in road construction will help to reduce the disposal problem of this waste and also will help to reduce the problem of scarcity of CSM. Lime and fibre were also added to the pond ash at various percentages to improve the suitability of this type of mix as subbase material. The optimum service life of pavement is studied with the help of numerical modelling and the cost benefit is also presented in the current study. The study reveals that stabilisation of the coal ash with 2% lime may produce an optimal material and, even though a greater thickness may be required to deliver the same pavement performance, direct cost savings of around 10% may be achieved in addition to less easily quantifiable environmental benefits. Design charts are provided to exploit the findings.

Journal Article Type Article
Journal International Journal of Pavement Engineering
Print ISSN 1029-8436
Electronic ISSN 1029-8436
Publisher Taylor & Francis (Routledge)
Peer Reviewed Peer Reviewed
APA6 Citation Sarkar, R., & Dawson, A. (in press). Economic assessment of use of pond ash in pavements. International Journal of Pavement Engineering, https://doi.org/10.1080/10298436.2015.1095915
DOI https://doi.org/10.1080/10298436.2015.1095915
Keywords Pond ash, geotechnical characterization, numerical analysis, economic assessment
Publisher URL http://www.tandfonline.com/doi/abs/10.1080/10298436.2015.1095915
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
Additional Information The Version of Record of this manuscript has been published and is available in International Journal of Pavement Engineering, c2015 http://www.tandfonline....0/10298436.2015.1095915

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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