183 documents found, page 1 of 19
Stucco Marble in the Portuguese Architecture: Multi-analytical Characterisation
Freire, M.T.; Santos Silva, A.; Veiga, M.D.R.; Barrocas Dias, Cristina; Manhita, AnaThe presence of stucco marble in the Portuguese architecture is not surveyed and studies addressing the materials used to produce it are almost inexistent. In this paper, the results of the multi-analytical characterisation using XRD, SEM-EDS, Py-GC/MS and the determination of capillary water absorption and dynamic modulus of elasticity of 15 samples belonging to seven case studies are presented and discussed. ...
Comparison of mineralogical, mechanical and hygroscopic characteristic of earth...
Santos, Tânia; Gomes, Maria Idália; Santos Silva, A.; Ferraz, E.; Faria, PaulinaIt is important to ensure indoor comfort by passive methods, avoiding mechanical equipment that has energy costs. To assess plasters common efficiency but also its contribution as moisture buffers, five different plastering mortars, including unstabilized and stabilized earth-based plasters, gypsum and cement-based pre-mixed plasters, were analyzed and their chemical, mechanical and hygroscopic characteristics ...
Analytical characterization of ancient mortars from the archaeological roman si...
Borsoi, G.; Santos Silva, A.; Menezes, P.; Candeias, António; Mirão, JoséThe analytical characterization of mortar samples from the roman archaeological site of Pisões, located in Southern Portugal, were carried out by means of X-ray diffractometry (XRD), thermogravimetry (TGADTA), optical and electron scanning microscopy (SEM-EDS), potentiometry and combustion analysis. The Pisões archaeological complex includes a villa rustica, characterized by well-preserved mosaics and thermal b...
Nanoconsolidants for lime mortars of wall paintings as a good alternative of tr...
Girginova, P.I.; Galacho, Cristina; Veiga, R.; Santos Silva, A.; Candeias, A.Carbonate stones and wall paintings, as an irremovable part of the architectural heritage, are subject to constant attack by soluble salts and pollutants. They can undergo different kinds of degradation, including corrosion by acid rain, physical erosion, cycles of salts crystallization/solubilization and biodegradation due to bacteria, fungi or lichens. Often, past treatments tend to cause additional substrate...
Nanocais para consolidação de suportes com pintura mural: síntese, caracterizaç...
Girginova, P.I.; Galacho, Cristina; Mirão, J.; Veiga, R.; Santos Silva, A.; Candeias, A.Vários trabalhos de investigação têm evidenciado que a utilização de nano-materiais na consolidação de suportes com pintura mural é uma alternativa viável aos consolidantes tradicionais, os quais apresentam várias limitações como, por exemplo, baixa solubilidade, toxicidade, preço, escassez, dificuldade de aplicação e, em alguns casos, baixa compatibilidade. No âmbito do estudo que tem vindo a ser desenvolvido,...
Os nanomateriais na conservação do Património Cultural: Nanocais para suportes ...
Girginova, P.I.; Galacho, Cristina; Mirão, J.; Veiga, R.; Santos Silva, A.; Candeias, A.Nas últimas décadas os nanomateriais têm sido vistos como uma boa alternativa de materiais para a preservação do Património Cultural [1], nomeadamente, como consolidantes de pedra e de argamassas de cal. Estes materiais apresentam propriedades distintas quando comparados com os tradicionais. O trabalho que tem vindo a ser desenvolvido no Laboratório HERCULES em parceria com o LNEC [2,3] compreende a preparação ...
Cultural networking: Rhetoric, policy and practice in Portugal
Santos Silva, A.The article examines the content and functionality of the concept of cultural networking, considering the context of dense social and institutional processes and recurring to available empirical data. The assumption is that fruitful sociological comparison needs the consideration of real and specific cases, if one wants to avoid the mimesis of administrative jargon or the ritual repetition of empty generalities...
Building materials with historical and heritage interest – A database in progress
Santos Silva, A.; Correia, M. J.; Rato, L.; Matos, N.Conservation and restoration of architectural heritage requires knowledge of the conservation state of its constituent materials in order to provide recommendations concerning the intervention plan, and the materials and the techniques to be used. Information on physical, chemical and mechanical characterization of materials, when available, is usually shared by different actors, but is not normally accessible ...
The archive oh historical materials in digital era as cultural value
Santos Silva, A.; Menezes, M.; Correia, M. J.Documenting and preserving materials data is important both to fulfill researcher’s needs and to obtain social benefits concerning the related educational and historical value. The samples repository is also demanded as a basis for further understanding, innovation and development, besides the preservation of the materials historical value and information. The dissemination of those materials importance to non-...
Estudo das argamassas do Cais das Colunas (Séc. XVIII), Lisboa, Portugal
Antunes, Alexandra de Carvalho; Coroado, J.; Santos Silva, A.; Veiga, M.R.O Cais das Colunas é o único cais monumental construído, em Lisboa, no âmbito do projeto de reconstrução da cidade depois do terramoto de 1755. O cais foi parcialmente desmontado em 1997 e reconstruído em 2008. Durante os trabalhos de reposição foram recolhidas amostras de argamassas originais, datáveis das décadas de 1770 a 1790, do núcleo do embarcadouro, tendo em vista o seu estudo e caracterização. A metodo...