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The role of ettringite in the deterioration of artificial lime stabilised soils: a microstructural study

Buttress, A.J.; Grenfell, J.R.A.; Airey, Gordon

Authors

A.J. Buttress adam.buttress@nottingham.ac.uk

J.R.A. Grenfell james.grenfell@nottingham.ac.uk

Gordon Airey gordon.airey@nottingham.ac.uk



Abstract

The formation of ettringite has been defined as a major failure mechanism of lime stabilised cohesive soils. It can result in both disruptive volumetric changes and loss of mechanical strength. The mechanisms of its formation and the role it plays in deleterious processes are complex. This paper reports the dimensional and strength changes of a range of artificial lime stabilised cohesive soils subject to two swell test procedures: the UK linear CBR swell test (BS1924-2, BSI 1990) and the European accelerated swell test (EN13286-49, CEN 2007). The resulting microstructural composition was analysed using a combination of Scanning Electron Microscopy and Electron Dispersive X-ray Spectroscopy (SEM-EDX). The results are explained in terms of established theories of crystal formation and subsequent expansion mechanisms.

Journal Article Type Article
Publication Date Sep 1, 2013
Journal Road Materials and Pavement Design
Print ISSN 1468-0629
Electronic ISSN 1468-0629
Publisher Taylor & Francis
Peer Reviewed Peer Reviewed
Volume 14
Issue 3
APA6 Citation Buttress, A., Grenfell, J., & Airey, G. (2013). The role of ettringite in the deterioration of artificial lime stabilised soils: a microstructural study. Road Materials and Pavement Design, 14(3), doi:10.1080/14680629.2013.779306
DOI https://doi.org/10.1080/14680629.2013.779306
Keywords swell test; lime; soil; ettringite; scanning electron microscopy; electron dispersive
X-ray spectroscopy
Publisher URL http://www.tandfonline.com/doi/abs/10.1080/14680629.2013.779306
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
Additional Information This is an Accepted Manuscript of an article published by Taylor & Francis in Road Materials and Pavement Design on 31/05/2013, available online: http://wwww.tandfonline...80/14680629.2013.779306

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Adam Buttress-The Role of Ettringite in the Deterioration of Artificial Lime Stabilised Soils A Microstructural Study.pdf (2.3 Mb)
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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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