Examining the effects of microencapsulated phase change materials on early-age temperature evolutions in realistic pavement geometries

Zhenyu She, Zhenhua Wei, Benjamin A. Young, Gabriel Falzone, Narayanan Neithalath, Gaurav Sant, Laurent Pilon

Research output: Contribution to journalArticle

Abstract

This study examines experimentally and numerically the effects of microencapsulated phase change material (PCM)additions on temperature rise and cool-down rate, and the associated impact on reducing the risk of thermal cracking in concrete pavements. Specimens representative of a realistic pavement geometry were exposed to diurnal temperature cycling at early ages while internal temperature evolutions were monitored. In spite of the fact that the lower thermal conductivity of the PCM inhibited heat dissipation, the results showed the presence of PCMs can reduce considerably the temperature rise and cool-down rate in the first 24 h following placement provided the PCM melting temperature is chosen suitably. A transient one-dimensional thermal model of a pavement section suitably captured experimental temperature evolutions and thereby offers the ability to inform the design of concrete pavements containing PCMs that feature early-age thermal cracking resistance.

Original languageEnglish (US)
Pages (from-to)149-159
Number of pages11
JournalCement and Concrete Composites
Volume103
DOIs
Publication statusPublished - Oct 1 2019
Externally publishedYes

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Keywords

  • Cement hydration
  • Concrete pavement
  • Early-age cracking
  • Microencapsulated phase change materials
  • Water-reducing admixture

ASJC Scopus subject areas

  • Building and Construction
  • Materials Science(all)

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