creators_name	Lima, José
creators_name	Faria, Paulina
creators_name	Santos Silva, António
type	article
datestamp	2022-03-18 08:37:43
lastmod	2022-03-18 08:37:43
metadata_visibility	show
title	Earth Plasters: The Influence of Clay Mineralogy in the Plasters’ Properties
ispublished	pub
subjects	F06
subjects	F32
subjects	F35
full_text_status	none
keywords	clayish earth
keywords	drying shrinkage
keywords	hygroscopicity
keywords	illitic clay
keywords	kaolinitic clay
keywords	montmorillonitic clay
keywords	mortar characterization
keywords	pore size distribution
keywords	vapour adsorption
keywords	water erosion
keywords	plaster
keywords	mineralogy
abstract	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.
date	2020
date_type	published
publication	International Journal of Architectural Heritage
volume	14
number	7
publisher	Taylor & Francis
pagerange	948-963
id_number	doi:10.1080/15583058.2020.1727064
refereed	TRUE
issn	1558-3058
official_url	https://doi.org/10.1080/15583058.2020.1727064
citation	Lima, José et Faria, Paulina et Santos Silva, António (2020) Earth Plasters: The Influence of Clay Mineralogy in the Plasters’ Properties. International Journal of Architectural Heritage, 14 (7). p. 948-963. ISSN 1558-3058 [Article]