Thermal, mechanical and microstructural analysis of concrete containing microencapsulated phase change materials

Dehdezi, Pejman Keikhaei and Hall, Matthew R. and Dawson, Andrew R. and Casey, Sean P. (2012) Thermal, mechanical and microstructural analysis of concrete containing microencapsulated phase change materials. International Journal of Pavement Engineering, 14 (5). pp. 449-462. ISSN 1477-268X

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Abstract

This paper studies the thermal, mechanical and microstructural aspects of concrete containing different amounts of microencapsulated phase change materials (PCMs). In addition, numerical simulation is carried out to study the potential application of PCM-modified concrete for reduction in summer surface temperature. It is shown that increasing PCM content in concrete led to lower thermal conductivity and an increase in the heat storage ability of concrete. However, the compressive and flexural strength of concrete significantly decreased. Microstructural analysis showed that PCMs appear to remain intact during mixing; however, PCM particles appear to fail by bursting under loading, creating hemispherical voids and crack initiation points as well as possible entrapped air behaviour. The result of numerical simulation revealed that reduction in summer concrete pavement surface temperature by several degrees was possible, with implications for reduction in concrete thermal stresses, shrinkage and urban heat island effect.

Item Type: Article
Additional Information: This is an Accepted Manuscript of an article published by Taylor & Francis in International Journal of Pavement Engineering on 16/08/2012, available online: http://www.tandfonline.com/10.1080/10298436.2012.716837.
Keywords: concrete pavement; SEM; thermal analysis; modelling; phase change materials
Schools/Departments: University of Nottingham, UK > Faculty of Engineering
Identification Number: 10.1080/10298436.2012.716837
Depositing User: Eprints, Support
Date Deposited: 26 Apr 2017 13:11
Last Modified: 27 Apr 2017 01:35
URI: http://eprints.nottingham.ac.uk/id/eprint/42313

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