RT Journal Article
SR 00
ID doi:10.1080/15583058.2020.1727064
A1 Lima, José
A1 Faria, Paulina
A1 Santos Silva, António
T1 Earth Plasters: The Influence of Clay Mineralogy in the Plasters’ Properties
JF International Journal of Architectural Heritage
YR 2020
FD 2020
VO 14
IS 7
SP 948
OP 963
K1 clayish earth
K1 drying shrinkage
K1 hygroscopicity
K1 illitic clay
K1 kaolinitic clay
K1 montmorillonitic clay
K1 mortar characterization
K1 pore size distribution
K1 vapour adsorption
K1 water erosion
K1 plaster
K1 mineralogy
AB Earth-based mortars have been used all over the world since ancient times in an extensive range  of building types from vernacular architecture to monuments. Plastering is one of the most  common contemporary applications of earth-based mortars used for earthen-building conservation  or modern architecture. Raw earth is a very diverse natural material, and clay minerals play  a key role in plaster properties being responsible for their setting process and providing the  capacity of balancing the indoor hygrometric conditions of buildings. This capacity offers significant  benefits to energy savings delivering comfort and health of inhabitants and also contributes  to building conservation. For this study, three mortars were produced with different  clayish earths to assess the influence of clay mineralogy. Mortars characterization confirmed that  clay mineralogy drives important plaster properties, such as vapour adsorption and drying  shrinkage, while also having a significant influence on mechanical strength, dry abrasion, and  thermal conductivity. Within the studied mortars, illitic clayish earth stands outs as more adequate  for earth-based plasters, showing balanced properties, namely linear drying shrinkage, mechanical  strength, dry abrasion, and water vapour adsorption.
PB Taylor & Francis
SN 1558-3058
LK http://openarchive.icomos.org/id/eprint/2587/
UL https://doi.org/10.1080/15583058.2020.1727064