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- Influência da resistência ao gelo de rochas silicatadas portuguesas na utilização como elemento construtivo exteriorPublication . Borges, Maria Isabel; Simão, J.; Carvalho, Cristina Isabel Paulo; Pires, Vera
- Mortars from the Palace of Knossos in Crete, Greece: A Multi-Analytical ApproachPublication . Carvalho, Fernanda; Sousa, Pedro; Leal, Nuno; Simão, J.; Kavoulaki, Elissavet; Lima, M.M.R.A.; Silva, Teresa; Águas, Hugo; Padeletti, GiuseppinaABSTRACT: The study of building materials constituting cultural heritage is fundamental to understand their characteristics and predict their behavior. When considering materials from archaeological sites, their characterization can provide not only relevant information for a broader understanding of the site and its importance and significance but can also increase knowledge about ancient materials and their performance. The Palace of Knossos is a very important archaeological site in the European history context, and its preservation benefits from the characterization of the constituent materials. Samples of mortars from this monument were collected under the scope of the H2020 HERACLES project, where a multi-analytical approach was chosen using established protocols for the different sample typologies. Instrumental techniques such as optical microscopy (OM), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and simultaneous thermogravimetry and differential thermal analysis (TG-DTA) were used for the chemical, mineralogical, and morphological characterization of these mortar samples. The results indicate that the majority are lime mortars, both aerial and hydraulic, but gypsum-based mortars were also identified. Differences in the chemical composition of the samples in distinct areas of the monument allowed us to reflect on the variety of materials used in the construction of the Palace of Knossos.
- Mortars from the Monastery of Santa Maria de Alcobaça, in Portugal: characteristics and functionsPublication . Carvalho, Fernanda; Lima, M.M.R.A.; Silva, Teresa; Nunes, A.; Pagará, A.; Costeira, I.; Leal, Nuno; Simão, J.; Galhano, Carlos; Veiga, JP
- Bedding mortars from medieval ceramic flooring from the Alcobaça Monastery in PortugalPublication . Carvalho, Fernanda; Nunes, A.; Pagará, A.; Costeira, I.; Silva, Teresa; Leal, Nuno; Simão, J.; Galhano, Carlos; Águas, Hugo; Lima, M.M.R.A.; Veiga, JPABSTRACT: Bedding mortars are fundamental materials to ensure the stability of titles, especially in the case of flooring which withstand the impact of people circulation. In a church, the quality of mortars, tiles pieces and their maintenance over time can be decisive for pavement durability. Inside the church of Santa Maria de Alcobaça Monastery, stone slabs are currently the main and the most applied type of paving in terms of covered area.
- Factor de qualidade em rochas ornamentais com base em ensaios mecânicos e envelhecimento artificialPublication . Simão, J.; Carvalho, Cristina Isabel Paulo; Silva, Zenaide Carvalho G.; Moura, A. Casal
- Estudo da alterabilidade por lixiviação em extrator soxhlet de materiais cerâmicos com incorporação de escórias resultantes da incineração de resíduos sólidos urbanosPublication . Elias, Joao; Galhano, Carlos; Simão, J.RESUMO: A produção de resíduos sólidos urbanos (RSU) está em constante crescimento, contribuído para um aumento dos impactes sobre o ambiente e a sociedade. Para tentar mitigar estes problemas foram realizados e ensaiados provetes cerâmicos ecológicos com incorporação de escórias resultantes da incineração de resíduos sólidos urbanos. Deste modo, pretendeu-se estudar o efeito do aumento da temperatura de cozedura, dos 900 ºC para os 1000 ºC, nos provetes com 0, 10 e 20% de escórias, sujeitos ao ensaio de alteração por lixiviação em extrator soxhlet. Com base nos resultados obtidos verificou-se um maior incremento da resistência nos provetes cerâmicos com 20% de escórias, cozidos a 1000 ºC.
- Stains in pavement applications of a portuguese limestonePublication . Simão, J.; Pires, Vera; Galhano, António Carlos; Carvalho, Cristina Isabel Paulo