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

Dehdezi, Pejman Keikhaei; Hall, Matthew R.; Dawson, Andrew R.; Casey, Sean P.

Authors

Pejman Keikhaei Dehdezi

Matthew R. Hall

Andrew R. Dawson

Sean P. Casey



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.

Journal Article Type Article
Journal International Journal of Pavement Engineering
Print ISSN 1029-8436
Electronic ISSN 1477-268X
Publisher Taylor & Francis (Routledge)
Peer Reviewed Peer Reviewed
Volume 14
Issue 5
Institution Citation Dehdezi, P. K., Hall, M. R., Dawson, A. R., & Casey, S. P. (in press). Thermal, mechanical and microstructural analysis of concrete containing microencapsulated phase change materials. International Journal of Pavement Engineering, 14(5), doi:10.1080/10298436.2012.716837
DOI https://doi.org/10.1080/10298436.2012.716837
Keywords concrete pavement; SEM; thermal analysis; modelling; phase change materials
Publisher URL http://www.tandfonline.com/doi/abs/10.1080/10298436.2012.716837
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 International Journal of Pavement Engineering on 16/08/2012, available online: http://www.tandfonline....0/10298436.2012.716837.

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Thermal mechanical and microstructural analysis ofconcrete containing microencapsulated phase change materials (Dawson5).pdf (1.1 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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