Abstract
Plasters can be formulated with different binders, presenting different characteristics. Their main function is the
protection of the substrate but, as indoor coatings, their influence on aesthetic performance and indoor air quality and comfort
is also important. A plaster formulated with a clayish earth is compared to plasters formulated with common binders, namely
hemihydrate gypsum, air lime and natural hydraulic lime. All the plasters have the same volumetric proportion binder:sand
and were produced with the same siliceous washed sand. Results show that: the linear shrinkage of the earth mortar was the
highest while the gypsum mortar presented no shrinkage; the bulk density of all the mortars were similar but there were
differences on thermal conductivity, with advantages for the lime mortars, although this property is not significant for plasters
application thicknesses; the gypsum mortar presented the highest mechanical properties while the lime mortars presented the
lowest, even lower in comparison to the earth mortar; however, the resistance to dry abrasion was lower for the earth plaster;
the earth plaster registers a very high hygroscopicity in comparison to all the other plasters, being an important contribution
to indoor comfort, occupants health and energy consumption reduction.
protection of the substrate but, as indoor coatings, their influence on aesthetic performance and indoor air quality and comfort
is also important. A plaster formulated with a clayish earth is compared to plasters formulated with common binders, namely
hemihydrate gypsum, air lime and natural hydraulic lime. All the plasters have the same volumetric proportion binder:sand
and were produced with the same siliceous washed sand. Results show that: the linear shrinkage of the earth mortar was the
highest while the gypsum mortar presented no shrinkage; the bulk density of all the mortars were similar but there were
differences on thermal conductivity, with advantages for the lime mortars, although this property is not significant for plasters
application thicknesses; the gypsum mortar presented the highest mechanical properties while the lime mortars presented the
lowest, even lower in comparison to the earth mortar; however, the resistance to dry abrasion was lower for the earth plaster;
the earth plaster registers a very high hygroscopicity in comparison to all the other plasters, being an important contribution
to indoor comfort, occupants health and energy consumption reduction.
| Original language | English |
|---|---|
| Title of host publication | 2nd International Conference on Sustainable, Environmentally Friendly Construction Materials |
| Editors | E. Horszczaruk, P. Brzozowski |
| Place of Publication | Szczecin, Poland |
| Publisher | West Pomeranian University of Technology, Szczecin Publishing House |
| Pages | 71-76 |
| ISBN (Print) | 978-83-7663-324-4 |
| Publication status | Published - 2021 |
| Event | 2nd International Conference on Sustainable, Environmentally Friendly Construction Materials - West Pomeranian University of Technology, Szczecin, Poland Duration: 31 Aug 2021 → 2 Sept 2021 Conference number: 2 http://icsefcm.zut.edu.pl/ |
Conference
| Conference | 2nd International Conference on Sustainable, Environmentally Friendly Construction Materials |
|---|---|
| Abbreviated title | ICSEFCM 2021 |
| Country/Territory | Poland |
| City | Szczecin |
| Period | 31/08/21 → 2/09/21 |
| Internet address |
Keywords
- gypsum
- natural hydraulic lime
- plaster
- clayish earth
- air lime
