Eco-efficient earthen plasters: The influence of the addition of natural fibers

José Lima, Paulina Faria

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

25 Citations (Scopus)


Clayish earth-based mortars are being recognized, all over the world, as eco-efficient products for plastering. Apart from being a product with low embodied energy when compared to other types of plasters, their application on the interior surface of walls may give a strong contribution for the health and comfort of inhabitants. As part of an ongoing research regarding earth-based plasters this work assesses the influence of the addition of two types of natural fibers—oat straw and typha fiber-wool—on the characteristics of plastering mortars made with a clayish earth. Mechanical and physical characteristics were tested, showing that addition of these fibers contribute to decrease linear drying shrinkage and thermal conductivity, as well as promoting the adhesion strength of plaster to the substrate. The improvement of mechanical resistance reveal to be dependent on the type of fiber added while the hygroscopic capacity of the plaster is maintained regardless of the fiber additions.

Original languageEnglish
Title of host publicationNatural Fibres
Subtitle of host publicationAdvances in Science and Technology Towards Industrial Applications
PublisherKluwer Academic Publishers
Number of pages13
ISBN (Print)9789401775137
Publication statusPublished - 2016
Event2nd International Conference on Natural Fibers, ICNF 2015 - Sao Miguel, Azores, Portugal
Duration: 27 Apr 201529 Apr 2015

Publication series

NameRILEM Bookseries
ISSN (Print)22110844
ISSN (Electronic)22110852


Conference2nd International Conference on Natural Fibers, ICNF 2015
CitySao Miguel, Azores


  • Earthen plasters
  • Hygroscopic capacity
  • Mechanical properties
  • Natural fibers


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