Reaaao Alcali Agregado
Mostrando 1-3 de 3 artigos, teses e dissertações.
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1. Modelagem hidro-mecÃnica de estruturas de concreto afetada pela reaÃÃo Ãlcali-agregado
Some structures of concrete in direct contact with the humidity, that have been executed with the use of potentially reactive aggregate and alkali text cement high, are affected to the alkali-aggregate development of reactions (RAA). The development of these reactions leads to the formation of a gel that in the water presence expands exerting pressure in the
Publicado em: 2008
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2. AvaliaÃÃo petrogrÃfica e experimental de agregados graÃdos afetados por deformaÃÃo tectÃnica, desenvolvimento de minerais de alteraÃÃo e texturas de exsoluÃÃo
Concrete deterioration due to alkali-aggregate reaction (AAR) represents serious problem throughout the world. Geological structurals such as shear zones are formed from compressive, extentional and shearing tectonics movement. Rocks close to fault zones usualy have mineralogical features unsuitable to be used as aggegate. This research reports on the micros
Publicado em: 2008
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3. SimulaÃÃo numÃrica do comportamento mecÃnico de elementos de concreto armado afetados pela reaÃÃo Ãlcali-agregado / Numerical simulation of the mechanical behaviour of reinforced concrete members affected by alcaliaggregate reaction
The subject of this work is the numerical simulation of the swelling due to alkaliaggregate reaction in reinforced concrete members. The inert chemically nature of the aggregate of cement Portland concrete was early questioned by Stanton (1940), nevertheless, just awaked Civil Engineering community interest, in 1980âs decade, because its damage in concrete
Publicado em: 2007