Evaluation of the Hygroscopic and CO2 Capture Capacities of Earth and Gypsum-Based Plasters

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


Earth mortars and gypsum mortars present ecological advantages compared to mortars made with other common binders. When applied as plasters, they are also referred as having advantages in improving comfort and indoor air quality. For earth plasters, this improvement is associated with the hygroscopic capacity of the clay minerals, which promotes high sorption and desorption capacity of water vapor. So, earth plasters can contribute to the regulation of the indoor relative humidity. Another important advantage of plasters could be their ability to capture carbon dioxide (CO2). In the present study, the sorption and desorption performance, and the capacity to capture CO2 by earth and gypsum plasters are evaluated. It is confirmed that the earth plaster has the greatest sorption and desorption capacity, but also higher CO2 capture capacity than gypsum plaster. This confirmation opens new perspectives for the use of functionalized plasters that guarantee greater control of air quality inside buildings.

Original languageEnglish
Title of host publicationConservation and Restoration of Historic Mortars and Masonry Structures
Subtitle of host publicationHMC 2022
EditorsVioleta Bokan Bosiljkov, Andreja Padovnik, Tilen Turk
Place of PublicationCham
Number of pages9
ISBN (Electronic)978-3-031-31472-8
ISBN (Print)978-3-031-31471-1
Publication statusPublished - 8 Jun 2023

Publication series

NameRILEM Bookseries
ISSN (Print)2211-0844
ISSN (Electronic)2211-0852


  • Clayey Earth
  • CO Capture
  • Gypsum
  • Hygroscopicity
  • Indoor Air Quality
  • Mortar


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