Thermal and structural performance of geopolymer concrete containing phase change material encapsulated in expanded clay

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23 Citations (Scopus)

Abstract

In this paper, novel geopolymer-coated expanded clay-phase change material (GP-L-PCM) macrocapsules added to geopolymer concrete (GPC) with volume ratios of 25%, 50%, and 75% for the production of GP-L-PCM slabs are described. The same amounts of lightweight expanded clay aggregate (LECA) were used to develop LECA slabs. The thermal and structural performances of LECA and GP-L-PCM slabs were compared with a reference GPC slab. It was observed that LECA and GP-L-PCM slabs exhibit lower heat transmission, represented by lower maximum surface temperatures (a decrease of 5.6 °C and 8.0 °C on the back surface) than that of GPC slab. Accordingly, the LECA and GP-L-PCM slabs exhibit U-values of 1.6 and 0.9 W/m 2 K, respectively, with 75% addition of LECA and GP-L-PCM capsules compared to 2 W/m 2 K for GPC. Substantial decrease in compressive strength was observed in the LECA and GP-L-PCM slabs as compared to GPC for all tested samples.

Original languageEnglish
Pages (from-to)72-81
Number of pages10
JournalEnergy and Buildings
Volume191
DOIs
Publication statusPublished - May 15 2019

Keywords

  • Compressive strength
  • Expanded clay
  • Geopolymer concrete
  • Phase change material
  • Thermal performance

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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