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Browsing DM/NMM - Comunicações a congressos e artigos de revista by Title

Now showing items 1-20 of 235

20th Century Mortars: Physical and Mechanical Properties from Awarded Buildings in Lisbon (Portugal)—Studies towards Their Conservation and Repair

Almeida, L.; Santos Silva, A.; Veiga, M. R.; Mirão, J. (MDPI, 2023-09-28)

This paper addresses the study of renders and plasters’ physical and mechanical characteristics from selected buildings awarded during the 20th century with a renowned architectural prize in Lisbon, Portugal. The ...
Adição de metacaulino em betão - efeitos sobre a durabilidade

Santos Silva, A. (2011-06)
Alcohol-Aminosilicate Hybrid Coatings for Corrosion Protection of Galvanized Steel in Mortar

Figueira, R. B.; Silva, C. J. R.; Pereira, E. V.; Salta, M. M. (Journal of The Electrochemical Society, 2014-05-13)

Organic-inorganic hybrid (OIH) matrices were synthesized by sol-gel method and deposited on hot-dip galvanized steel (HDGS) using a dip-coating process. These OIHs, generally called amino-alcohol-silicates, were synthesized ...
Alkali-Aggregate Reactions in concrete: Methodologies applied in the evaluation of Alkali Reactivity of Aggregates for concrete

Santos Silva, A.; Soares, D.; Fernandes, I.; Salta, M. M. (Escola de Engenharia da Universidade do Minho, 2011-04)

The alkali-aggregate reaction (AAR) in concrete is a group of chemical reactions that involves the reaction of certain minerals present in the aggregates with alkali and hydroxyl ions in the interstitial solution of cement ...
Alkali-Aggregate Reactions in Concrete: Methodologies Applied in the Evaluation of Alkali Reactivity of Aggregates for Concrete

Santos Silva, A.; Soares, D.; Matos, L.; Fernandes, I.; Salta, M. M. (Trans Tech Publications, 2013)

The alkali-aggregate reaction (AAR) in concrete is a group of chemical reactions that involves the reaction of certain minerals present in the aggregates with alkali and hydroxyl ions in the interstitial solution of cement ...
Alkali-silica reaction - A case study in the Azores Archipelago throught the ReAVA project

Medeiros, S.; Fernandes, I.; Nunes, J. C.; Santos Silva, A.; Soares, D. (LREC, 2016-04-23)

Concrete is one of the most widely used construction material in the world. However concrete structures can deteriorate during their lifetime due to material limitations, design and construction practices and severe exposure ...
Análise elementar em profundidade por espetrometria de emissão ótica de descarga luminescente em revestimentos de aços galvanizados

Adriano, P.; Melo, A. P.; Pereira, E. V. (2012-06-08)

Tradicionalmente utilizada na análise elementar de metais e suas ligas, a espetrometria de emissão ótica de descarga luminescente (GD-OES) tem vindo a despertar um interesse crescente na determinação da composição química ...
Análise termogravimétrica: Princípios, potencialidades e exemplos

Santos Silva, A. (FCT/UNL, 2012-09-10)

Esta comunicação aborda aspetos da aplicação da análise termogravimétrica ao estudo de materiais ilustrando com exemplos.
Ancient mortars under action of marine environment: a Physico-Chemical Characterization

Borges, C.; Santos Silva, A.; Veiga, M. R. (RILEM Publications S.A.R.L, 2010-09)

Climatic and environmental conditions are often very severe for construction materials, namely in the presence of high humidity or in direct contact with water. However, some historical buildings currently are in very ...
Application protocol for the consolidation of calcareous substrates by the use of nanolimes: from laboratory research to practice

Borsoi, G.; Lubelli, B.; van Hees, R.; Veiga, M. R.; Santos Silva, A. (BIRKHÄUSER, 2017-02-01)

Calcareous materials such as limestone and lime-based mortars, widely used in the Built Heritage, are often subjected to degradation processes that can lead to loss of cohesion and material loss. Consolidation of these ...
Argamassas antigas. Produtos resultantes de reações químicas ao longo do tempo.

Magalhães, A.; Santos Silva, A.; Veiga, M. R. (2011-05)

As modificações sofridas pelas argamassas de revestimento ao longo do tempo são acompanhadas de rearranjos químicos e físicos na sua estrutura, bem como de alterações nas suas propriedades químicas e físicas. Várias reações ...
Argamassas resistentes ao tempo: abordagem microestrutural de fortificações portuguesas

Menezes, P.; Borges, C.; Santos Silva, A.; Menezes, A. P.; Veiga, M. R. (2011-05)

O complexo de fortificações de Cascais, litoral centro-sul de Portugal, foi erguido a partir do século XVI com a intenção de reforçar a defesa marítima da Vila e porto de Cascais, ao temer-se que as forças castelhanas ...
ASR impact on concrete with recycled aggregates

Santos, M. B.; Santos Silva, A.; Brito, J. (IBRACON, 2016-07)

Nowadays, with the increase of sustainable construction criteria, the incorporation of recycled coarse aggregate concrete (RCA) in concrete has become a reality. Alkali-silica reaction (ASR) is one of the most concerning ...
ASR of mortars containing glass

Serpa, D.; Santos Silva, A.; Brito, J.; Pontes, J.; Soares, D. (Elsevier, 2013-10)

Glass is a material that raises environmental issues in terms of both recycling and dumping. Some studies have shown the potential of glass as pozzolan when used as fine powder. Its use as aggregate in cementitious materials ...
ASR – performance testing: main findings in the Norwegian COIN project

Lindgård, J.; Rønning, T.; Thomas, M.; Fournier, B.; Santos Silva, A. (IBRACON, 2016-07)

Work is going on in several countries to try to develop a reliable performance testing concept for ASR. This topic was also focused on in the Norwegian R&D project "COIN" (2007-2014). The work was closely linked to the ...
Assessment of alkalis released by aggregates. Contribution to the alkalinity increase and AAR development in concrete

Soares, D.; Santos Silva, A.; Mirão, J.; Ramos, V.; Fernandes, I.; Menéndez , E. (LABORATÓRIO NACIONAL DE ENGENHARIA CIVIL, I. P., 2015-04)

Concrete swelling processes are one of the main degradation mechanisms of hydro concrete structures, such as dams. Included in this degradation phenomenon, the reactions that involve the aggregates when exposed to the ...
Assessment of ferrous building materials

Correia, M. J.; Fontinha, I. R.; Pereira, E. V. (UM, 2023-09)

Built heritage constitutes a legacy that is received from the past, experienced in the present, and that should be preserved for future generations. However, the succession of this legacy is sometimes lost because the ...
Assessment of the alteration of granitic rocks and its influence on alkalis release

Ferraz, A. R. E.; Fernandes, I.; Soares, D.; Santos Silva, A.; Quinta-Ferreira, M. (IOP Publishing Ltd, 2017-12)

Several concrete structures had shown signs of degradation some years after construction due to internal expansive reactions. Among these reactions there are the alkaliaggregate reactions (AAR) that occur between the ...
Assessment of the potential alkali-reactivity of volcanic aggregates from Azores islands

Medeiros, S.; Katayama, T.; Zanon, V.; Fernandes, I.; Santos Silva, A.; Nunes, J. C.; Miranda, V.; Ramos, V.; Soares, D. (2012-05)

Volcanic rocks have been found to be potentially alkali-reactive in a number of countries, including Japan, Iceland and Turkey. To characterize the potential reactivity of the volcanic rocks used as aggregates for concrete ...
Assessment of the potential reactivity of granitic rocks — Petrography and expansion tests

Ramos, V.; Fernandes, I.; Santos Silva, A.; Soares, D.; Fournier, B.; Leal, S.; Noronha, F. (Elsevier, 2016-08)

Granite is one of the most commonly employed materials in the production of aggregates for concrete, and represents 40% of the total volume of aggregates produced in Portugal. This type of rock is traditionally considered ...

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