Development of structural thermal energy storage concrete using paraffin intruded lightweight aggregate with nano-refined modified encapsulation paste layer

Sher Afgan, Rao Arsalan Khushnood, Shazim Memon, Naseem Iqbal

Research output: Contribution to journalArticle


Nano-refined epoxy paste is formulated using the optimum fractions of nano-silica fume and graphite powder to effectively encapsulate the aggregate storing phase change materials. The refined recipe offered delays in setting by 3–3.5 hrs accompanied with 15 times reduction in the thickness of coated layer, contributing in added workability, reduced consumption and strong adhesion to the established interfacial bond. The developed macro encapsulated phase change materials were found to be thermally stable, chemically compatible and thermally reliable. The melting and freezing temperatures were determined as 17.12 °C and 32.90 °C respectively with the latent heat storage capacity of 12.6 J/g. The developed thermocrete via 100% integration of macro-encapsulated aggregates showed compressive strength of more than 15 MPa and owed the potential to conserve energy by lowering the internal temperature (6.4 °C), resistance to high fluctuation in temperature while maintaining a narrow range (22 °C−30.2 °C) and by shifting the energy loads during peak periods (15-min).

Original languageEnglish
Article number116768
JournalConstruction and Building Materials
Publication statusPublished - Dec 20 2019



  • Macro-encapsulated phase change materials
  • Nano-silica fume
  • Paraffin
  • Phase change materials

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)

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