Study of properties of gypsum plasters from Araripe’s Pole for application in restoration mortars

Author(s): Fernanda Cavalcanti Ferreira, Jose Getulio Gomes de Sousa, Arnaldo Manoel Pereira Carneiro
Paper category: Proceedings
Book title: Proceedings of the 5th Historic Mortars Conference
Editor(s): José Ignacio Álvarez, José María Fernández, Íńigo Navarro, Adrián Durán, Rafael Sirera
ISBN: 978-2-35158-221-3
e-ISBN: 978-2-35158-222-0
Publisher: RILEM Publications SARL
Publication year: 2019
Pages: 171-185
Total Pages: 15
Language : English

Abstract: Gypsum plaster is the earliest binder known. It has been extensively used for indoor masonry coatings. Brazilian northeast has abundance and quality of the gypsum raw material, especially in Araripe’s Pole. In this context, it is verified that the gypsum plaster (CaSO4.0.5H2O without admixture and additions) from the Araripe’s Pole can be an excellent option for execution and repairing of historical coatings. In order to know in detail the material and understand the relation between the way of production of the gypsum plaster and its influence in the characteristics of these materials, the relationship between gypsum plaster production control characterized by the size of the company and gypsum plaster properties was evaluated. The experimental program was divided into analysis of characterization of gypsum plaster and evaluation of bond strength of coatings executed with these materials. Six samples of gypsum plaster were collected from different producers in the region. It was verified that the samples have high quality and, regardless of the manufacturer, present satisfactory performances. This is explained by the characteristics of the raw material present in the region, allowing its use in restoration mortars.

Online publication : 2019
Publication type : full_text
Public price (Euros) : 0.00