Caracterização das argamassas históricas existentes na Usina de Ilha Bela localizada no município de Ceará Mirim/RN

Abstract

Seeking to maintain the identity of a society, the search for conservation of cultural heritage is fundamental. The historical buildings are integral parts of this heritage, as they keep evidence of the constructive history of the building, as well as methods and materials, which is of the utmost importance to meet the principles of restoration of these assets. In this context, this work aims to characterize the lime mortars of the Ilha Bela/RN. For that, an on-site visit was carried out for visual observation and photographic registration of the building, and collection of coating mortar samples for subsequent physical-chemical and mineralogical characterization through visual analysis and laboratory analytical techniques, FRX, XRD, TG/DTG, determination of binder content by acid etching, particle size distribution, water absorption by immersion and compressive strength. From the analyzes it was verified that the studied mortars are rich in lime, with agglomerant of calcitic nature and sand of silicosa origin, as aggregate, with the presence of clay. Mortars A01, A03, A04, A05 and A06 are composed of lime and sand, while mortar A02 consists of lime, sand and clay. The agglomeration/aggregate ratios are: 1:3 for samples A01 and A04, 1:8 for samples A02 and A03 and 1:6 for samples A05 and A06. Thus, based on information on existing mortars, it is possible to design a compatible restoration mortar for the conservation of these historic buildings, highlighting historical and cultural values, thus contributing to the preservation of these state monuments.