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Advisor(s)
Abstract(s)
Com o passar dos anos, as obras mais sublimes, começam a mostrar marcas subtis ou profundas de
deterioração, como por exemplo: fissurações e defeitos associados à humidade. Estes são reflexo de
fatores externos, como fungos, a própria atmosfera reativa, mudanças climatéricas e, até mesmo, a ação
do homem.
Neste seguimento pretende-se estudar as principais argamassas utilizadas na reabilitação de edifícios
antigos, principalmente, as argamassas utilizadas no decorrer das obras ao longo do estágio, com o
objetivo de comparar as suas caraterísticas, sendo estas argamassas tradicionais e pré-fabricadas. Foram
feitos vários ensaios para determinar as suas resistências mecânicas, nomeadamente, o ensaio de
resistência à flexão e compressão em diferentes idades após a confeção das argamassas, e ensaios para
determinar a sua durabilidade como o ensaio de absorção da água por capilaridade; ensaio de absorção
de água por imersão às 48horas (pressão atmosférica); ensaio para determinação do teor de água às
48horas e o ensaio de arrancamento (pull-off).
A análise dos resultados mostrou que as argamassas adquirem mais resistência com o passar do tempo
após a sua confeção, e que as argamassas dos provetes obtidos de forma tradicional, constituídos por
argamassa de cal Hidráulica (HL5) e argamassa de cimento, apresentam melhores resultados do que a
argamassa pré-fabricada (weber.cal classic).
Over the years, the most sublime works start to show subtle or deep marks of deterioration. For example cracks and defects associated with humidity. These are a reflection of external factors such as fungi, reactive atmosphere, and climate change and, even, man’s action. In this follow it’s pretend to study the main mortars used in the rehabilitation of old buildings, especially the mortars used during the works along the stage, in order to compare their characteristics, the mortars are traditional and prefabricated. Several tests were made to determine their mechanical resistance, particularly the flexural and compression strength test at different ages after the confection of mortars, and assays for determining their durability as the water test by capillary absorption; Water absorption Test by water immersion for 48 hours (at atmospheric pressure); assay for determining water content to 48 hours, and the pull-off test. The results showed that the mortar acquire more resistance over time after quilting, and the mortars of test pieces obtained in a traditional way, constituted of hydraulic lime mortar (HL5) and cement mortar, have better results than prefabricated mortar (weber.cal classic).
Over the years, the most sublime works start to show subtle or deep marks of deterioration. For example cracks and defects associated with humidity. These are a reflection of external factors such as fungi, reactive atmosphere, and climate change and, even, man’s action. In this follow it’s pretend to study the main mortars used in the rehabilitation of old buildings, especially the mortars used during the works along the stage, in order to compare their characteristics, the mortars are traditional and prefabricated. Several tests were made to determine their mechanical resistance, particularly the flexural and compression strength test at different ages after the confection of mortars, and assays for determining their durability as the water test by capillary absorption; Water absorption Test by water immersion for 48 hours (at atmospheric pressure); assay for determining water content to 48 hours, and the pull-off test. The results showed that the mortar acquire more resistance over time after quilting, and the mortars of test pieces obtained in a traditional way, constituted of hydraulic lime mortar (HL5) and cement mortar, have better results than prefabricated mortar (weber.cal classic).
Description
Keywords
Caraterização das argamassas Argamassas de Reabilitação Argamassa de Revestimento Argamassa de Assentamento Description of Grout Rehabilitation Grout Coatings Grout Settlement Grout