Thermal Performance Evaluation of Walls with AAC Blocks, Insulating Plaster, and Reflective Coating

Ahmed A.Alawi Al-Naghi, Muhammad Kalimur Rahman*, Omar S.Baghabra Al-Amoudi, Salah U. Al-Dulaijan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


A comparison of the thermal performance and energy efficiency of walls constructed using autoclaved aerated concrete (AAC) block with thermal insulating plaster and reflective coating and the standard hollow-core concrete block (HCB) wall is presented. The study was performed through the field monitoring of two test rooms with AAC and HCB walls located in Eastern Saudi Arabia, with weather characterized by a hot and humid climate during the summer. Weather stations, infrared cameras, thermocouples, heat flux meters, temperature/relative humidity sensors, U-value equipment, and power meters were used to assess the thermal performance and energy consumption of the two test rooms. The results indicated that the thermal resistance of AAC walls was about five times that of the HCB walls, whereas the thermal transmittance of AAC walls was reduced by 82%. The AAC blocks with insulating plaster and reflective coating tendered a 58% reduction in the energy consumption in the AAC wall test room. Simulation of the test rooms using DesignBuilder software version 5.4 captured the field results with reasonable accuracy.

Original languageEnglish
Article number04019040
JournalJournal of Energy Engineering
Issue number2
StatePublished - 1 Apr 2020

Bibliographical note

Publisher Copyright:
© 2019 American Society of Civil Engineers.


  • Autoclave aerated concrete
  • Energy consumption
  • Insulating plaster
  • Reflective coating
  • Thermal resistance
  • Thermal transmittance

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Renewable Energy, Sustainability and the Environment
  • Nuclear Energy and Engineering
  • Waste Management and Disposal
  • Energy Engineering and Power Technology


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