Avaliação da eficácia de hidrofugantes e antigraffiti no Arenito Itararé

Grossi, Danielle; Lama, Eliane Aparecida Del

doi:10.11606/issn.2316-9095.v18-144298

Cited by 3 publications

(2 citation statements)

References 14 publications

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“…Chromatic changes resulting from heating have been reported for clay minerals in sandstones [40] and in limestone [27], and for biotite, amphiboles, garnet, alkaline feldspars, chlorite, and quartz in granitoids [68], and these authors also refer to the influence of the content in biotite and plagioclase on the rock physical damage by cracking.…”

Section: Minerals and Other Phase Constituentsmentioning

confidence: 94%

Rock Features and Alteration of Stone Materials Used for the Built Environment: A Review of Recent Publications on Ageing Tests

2020

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This work presents a review of recent publications, with publication date between 2017 and 2019, with information on the relation between rock characteristics and the effects of diverse agents associated with alteration of stone materials in the built environment. It considers information obtained from ageing tests performed under laboratory conditions and by exposure to outdoor agents. Several lithological groups were considered, with sedimentary carbonate rocks being the most frequently studied lithotypes and silicate metamorphic rocks being the group with scarcer information. In terms of ageing tests, salt weathering was the most frequent one while there was a noticeable lesser amount of information from tests with biological colonization. The collected data showed the influence of diverse features, from specific minerals to whole-rock properties and the presence of heterogeneities. These information are discussed in the context of formulating a general framework for stone decay.

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Section: Minerals and Other Phase Constituentsmentioning

confidence: 94%

Rock Features and Alteration of Stone Materials Used for the Built Environment: A Review of Recent Publications on Ageing Tests

2020

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“…Essa prática configura-se, na maioria das vezes, irreversível, pelo fato do arenito ser uma rocha muito frágil, e para "apagar" as pichações seria necessário desgastar ainda mais a rocha. Apesar da remoção das pichações não ser aconselhada, por ser custosa, difícil e poder causar danos ao substrato, há uma alternativa para minimizar esse problema que é o uso de produtos chamados de antigraffiti (Grossi e Del Lama, 2018).…”

Section: Fatores Limitantes Do Manejounclassified

Proposta de plano de manejo para o geossítio Gruta do Índio, Geoparque Quarta Colônia Aspirante UNESCO, RS, Brasil

Vestena,

Figueiró

2023

physisterrae

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O Geossítio Gruta do Índio está localizado no município de Agudo, Rio Grande do Sul, Brasil, e é um dos Geossítios do Geoparque Quarta Colônia Aspirante UNESCO. Sendo uma caverna esculpida em arenito, possui interesses turísticos, atrelado à beleza cênica, relevância antropológica (considerando que a região já foi habitada por comunidades indígenas no passado) e, também, de cunho científico e didático. Entretanto, por estar em uma propriedade particular e receber visitações sem controle, atualmente a ação antrópica é um fator que está pondo em risco a integridade do ambiente cavernícola. Nesse sentido, o presente trabalho buscou, tendo como base conceitual os princípios da metodologia do Limite Aceitável de Câmbio – LAC, apresentar um plano de manejo, com estratégias de visitação, que podem ajudar a evitar a degradação do patrimônio e fortalecer o turismo no Geoparque Quarta Colônia Aspirante UNESCO. Foi proposto uma delimitação para o Geossítio, com 3 zonas diferenciadas, sendo uma zona de conservação, uma área de utilização de recursos naturais, e uma área de proteção geopatrimonial, que prioriza a proteção da gruta. Já no que diz respeito às medidas de manejo propostas, estas podem ser resumidas a três principais estratégias, sendo a implementação de ações de educação ambiental, o investimento em infraestrutura e em material interpretativo. Por fim, espera-se que este trabalho sirva como base para que medidas de conservação sejam aplicadas no Geossítio Gruta do Índio.

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Anti-Graffiti Coatings on Stones for Historical Buildings in Turin (NW Italy)

et al. 2020

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The application of anti-graffiti products to stones belonging to architectural heritage is a common procedure that is currently complementary to traditional graffiti removal treatments, such as chemical and mechanical cleaning. In this study, two anti-graffiti coatings (a sacrificial product and a permanent one) were tested on four stones (with a different texture, mineralogy, and surface finish) commonly found in the historical city center of Turin (Italy). In order to evaluate the effectiveness of the anti-graffiti products, the removal of two graffiti paints with different compositions was tested. The results of the cleaning procedures performed on the surfaces coated with anti-graffiti products were evaluated, considering both the graffiti remains and the alterations induced on the surface. Chemical cleaning based on the use of a low-toxic ternary solvent mixture was applied on the unprotected stones for a comparison with the results obtained on the surfaces coated with anti-graffiti products. The samples were observed under stereomicroscopy and ultraviolet fluorescence photography and all of the treated surfaces were evaluated by roughness measurements, the contact sponge method, static contact angle measurements, and scanning electron microscopy. The composition of the anti-graffiti product, the graffiti paint to be cleaned, and the remover recommended by the manufacturer proved to be key factors for the cleaning effectiveness achieved on coated surfaces. Moreover, to a lesser extent, the mineralogy, texture, and surface finish of the stone also influenced the results of the cleaning procedures. The sacrificial anti-graffiti product enhanced the cleaning effectiveness on all stones if compared to uncoated surfaces; however, the permanence of coating remains on the surface after cleaning proved to be critical. Regarding the use of the permanent anti-graffiti products, intense disparate results were achieved, depending on the graffiti paint composition.

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Avaliação da eficácia de hidrofugantes e antigraffiti no Arenito Itararé

Cited by 3 publications

References 14 publications

Rock Features and Alteration of Stone Materials Used for the Built Environment: A Review of Recent Publications on Ageing Tests

Rock Features and Alteration of Stone Materials Used for the Built Environment: A Review of Recent Publications on Ageing Tests

Proposta de plano de manejo para o geossítio Gruta do Índio, Geoparque Quarta Colônia Aspirante UNESCO, RS, Brasil

Anti-Graffiti Coatings on Stones for Historical Buildings in Turin (NW Italy)

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