Physicochemical characterisation of traditional mortars present on historical earthen buildings in the Paraíba Valley and their vulnerability to environmental factors stress

• Grant number: 17/03071-7
• Support Opportunities: Regular Research Grants
• Start date: July 01, 2017
• End date: June 30, 2019
• Field of knowledge: Interdisciplinary Subjects
• Principal Investigator: Andrea Cavicchioli
• Grantee: Andrea Cavicchioli
• Host Institution: Escola de Artes, Ciências e Humanidades (EACH). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated researchers: Carlos Guillermo Rolón ; Felipe Santiago Chambergo Alcalde ; Lucy Gomes Sant'Anna ; Viviane Abreu Nunes Cerqueira Dantas
• Associated scholarship(s): 17/16477-1 - Conducting sample procedures preparation for physical and chemical characterization steps of mortars and specimen tests, BP.TT

Abstract

Earthen architecture and the techniques of wattle-and-daub, rammed earth and adobe constitute an exceptional ensemble of historical constructions in Brazil and, in particular, in the valley of the Paraíba river. This heritage is at risk of disappearing and demands suitable preservation policies. In turn, these policies depend on the support of research actions, encompassing the identification and mapping of historical buildings erected between the XVIII and XIX centuries (not always complied into official protection records), as well as the profound characterisation of the composition of materials and the physical, chemical and biological deterioration processes. It should be noted that the preservation of earthen architecture is essential to guarantee the permanence of tangible records of building practices throughout our history.The present proposal will approach the issue of covering mortars used on earthen buildings, since these elements play a crucial role in the protection of buildings against the aggression of environmental factors. Namely, the scope of this project is to draw a picture of the different solutions adopted in the conception of such materials in terms of composition - in the different historical moments - and to assess the resistance/vulnerability of such systems to abiotic and biotic aggression agents, in the context of the Paraíba valley and in the light of the forthcoming climate change projected for that area. With this goal in mind, the research will include the assembly of a base of samples of mortars of earthen buildings and their physical, chemical and microbiological characterisation, as well as a series of laboratory simulations in which the response of reconstructed specimens to the stress produced by selected environmental factors. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

ANDREA CAVICCHIOLI; LUCY GOMES SANT'ANNA. The production of protective earth-based mortars for earth constructions in southeastern Brazil during the 19th century coffee economy. An. mus. paul., v. 30, 2022-05-16. (17/16477-1, 17/03071-7)

CAVICCHIOLI, ANDREA; ROLON, GUILLERMO; ODLYHA, MARIANNE. A Chemical Approach to the Selection of Soils for the Reproduction of Earth-based Mortars for Conservation Purposes: Case Report from a Brazilian Historic Site. International Journal of Architectural Heritage, v. N/A, p. 15-pg., 2022-06-10. (17/16477-1, 17/03071-7)