EPS Blended Cementitious Plaster for Improved Thermal Comfort in Buildings

Aaruga Selvaratnam, Kumari Gamage, Indika De Silva

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review


The use of green materials in building construction has become trendy to improve the thermal comfort within the buildings with minimized natural resources. This paper presents the development of a cementitious insulated plaster using Expanded Polystyrene (EPS) as partial replacement for fine aggregates. An experimental program was conducted by replacing the fine aggregates in the conventional plaster with EPS in the range of 0–200% by volume. A reduction up to 69% and 53% were noted in thermal conductivity and density, respectively due to the replacement of aggregates with EPS in the conventional mortar. From a trial and error process, the mix with 125% replacement by EPS was selected as the ideal mix for optimum thermo-mechanical performance. A numerical model was developed to examine the heat transfer behaviour through a wall/Plaster composite and the predicted results were in a satisfactory agreement with the experimental results. A reduction of 18% in the decrement factor and an increment of 20% in time lag were noted in the wall panels with the developed EPS-Cement plaster.
Original languageEnglish
Title of host publicationICSBE 2020
Subtitle of host publicationProceedings of the 11th International Conference on Sustainable Built Environment
EditorsRanjith Dissanayake, Priyan Mendis, Kolita Weerasekera, Sudhira De Silva, Shiromal Fernando
PublisherSpringer Singapore
Number of pages12
ISBN (Electronic)9789811644122
ISBN (Print)9789811644115
Publication statusPublished - 25 Oct 2021

Publication series

NameLecture Notes in Civil Engineering
ISSN (Print)2366-2557
ISSN (Electronic)2366-2565


  • EPS
  • green insulation
  • recycling
  • thermal comfort
  • wall plaster


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