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Transient thermal behaviour of crumb rubber-modified concrete and implications for thermal response and energy efficiency in buildings

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journal contribution
posted on 29.05.2014, 13:50 by Matthew Hall, Khalid B. Najim, Christina Hopfe
Experimental data is presented for the dry and saturated steady state thermo-physical properties, and also the dynamic thermal properties, of 180, 120 and 65 mm target slump mix designs for Plain Rubberised Concrete (PRC) with varying %wt rubber substitution and aggregate replacement types (fine, coarse, and mixed). The composites had significantly lower density and thermal conductivity than plain concrete, and there was an inverse relationship between thermal admittance and (a) mix design target slump, and (b) %wt crumb rubber substitution. The thermal decrement remained almost constant, and yet the associated time lag can be increased significantly. Parametric analysis of the effects of crumb rubber substitution for a heavyweight PassivHaus standard dwelling (in non-mechanical ventilation mode) was conducted using building performance simulation. For a London (warmer) or Glasgow (cooler) climate, PRC can be used at up to 30%wt addition and all replacement types as a substitute for plain concrete without causing any significant difference in Dry Resultant Temperature (DRT) fluctuation, if used in conjunction with passive ventilation for night time cooling. However, for the same material there was a general tendency to increase the number of overheating hours in this construction type due to its greater ability to retain any stored heat energy.

History

School

  • Architecture, Building and Civil Engineering

Citation

HALL, M.R., NAJIM, K.B. and HOPFE, C.J., 2011. Transient thermal behaviour of crumb rubber-modified concrete and implications for thermal response and energy efficiency in buildings. Applied Thermal Engineering, 33-34, pp.77–85.

Publisher

© Elsevier

Version

AM (Accepted Manuscript)

Publication date

2011

Notes

This is the author’s version of a work that was accepted for publication in Applied Thermal Engineering. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published at: http://dx.doi.org/10.1016/j.applthermaleng.2011.09.015

ISSN

1359-4311

Language

en

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