Publicomos

Notice (permalien)

Réf.

43304

Type

conference item

Titre

Earth, gypsum and cement-based plasters contribution to indoor comfort and health

Langues

English

Auteurs

Gomes, Maria Idália / Santos, Tânia / Faria, Paulina

Date

2021

Pages

p. 105-117

Titre de la source

Proceedings of the 3rd RILEM Spring Convention and Conference (RSCC2020)

Vol. & n°

v. 32

Titre de conférence

RSCC2020 - 3rd RILEM Spring Convention and Conference

Lieu de conférence

Guimarães, Portugal

ISSN

2211-0844

Mots-clés

air lime / building materials / analysis of materials / materials testing / mechanical properties / physical properties / clay / earth / cement / gypsum / indoor air quality / mortar / plaster

Résumé en anglais

Indoor air quality is important for comfort and health of buildings inhabitants. The use of environmentally friendly building materials is also very important for sustainable and green buildings. In the present study, mechanical characteristics of five mortars were comparably analyzed: two unstabilized earth mortars, one earth-air lime mortar, one cement mortar and other gyp-sum mortar. The earthen plasters are nowadays commonly applied unpaint-ed. The gypsum plaster system is composed by the base mortar and a finish-ing layer; it can be applied unpainted or painted. The cement plaster is generally finished with a paint system. Therefore, the adsorption and desorption capacities were assessed for all the plasters and the influence of the paint system was evaluated for the cement and gypsum plasters. Results show that the earth mortar stabilized with air lime presents lower mechanical strength, in comparison to all other mortars, and lower adsorption capacity, similar to the gypsum system. The unstabilized earth plasters present high adsorption capacity, in comparison to the cement and gypsum plasters. The paint system does not have significant influence on the adsorption capacity of the gypsum plaster but reduced that capacity on the cement plaster. These results demonstrate the important contribution that unstabilized earth plasters may provide as passive indoor hygrothermal buffers, in comparison to other plasters, thus to comfort and occupants health.

DOI

https://doi.org/10.1007/978-3-030-76547-7_10