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A presente dissertação, de cariz experimental, aborda a técnica de injeção de paredes de alvenaria antiga para sua consolidação e em particular estuda, duas caldas apropriadas para injeção e seu comportamento face a suportes de tijolo.
Neste estudo compara-se o desempenho físico de duas caldas à base de cal, com composições diferentes de modo a avaliar as suas características. Uma é composta por cal hidratada, cimento branco, metacaulino e água, sendo que a outra é composta por cal hidráulica, cimento branco e água.
A durabilidade das caldas foi feita com ensaio de molhagem e secagem e ensaios de envelhecimento acelerado em câmara climática variando a temperatura e a humidade relativa. Para a avaliação do comportamento mecânico foram realizados ensaio no estado endurecido relativos à resistência à flexão e à compressão e ensaio de aderência entre a calda e o tijolo.
The present dissertation, on natural terms (natural effects), approach the technique of injection of old masonry walls for its consolidation and it studies in particular two appropriate grouts (for injection) and their behavior against brick supports. In this study there is a comparison of the physical performance of two lime based grouts, with different compositions in order to evaluate their characteristics. One is composed of hydrated lime, white cement, metakaolin and water, while the other is composed of hydraulic lime, white cement and water. The durability of the grout was done by wet and dry test and accelerated aging tests in climatic chamber varying the temperature and relative humidity. For the evaluation of the mechanical behavior, tests were performed in the hardened state concerning the flexural and compressive strength and adhesion test between the grout and the brick.
The present dissertation, on natural terms (natural effects), approach the technique of injection of old masonry walls for its consolidation and it studies in particular two appropriate grouts (for injection) and their behavior against brick supports. In this study there is a comparison of the physical performance of two lime based grouts, with different compositions in order to evaluate their characteristics. One is composed of hydrated lime, white cement, metakaolin and water, while the other is composed of hydraulic lime, white cement and water. The durability of the grout was done by wet and dry test and accelerated aging tests in climatic chamber varying the temperature and relative humidity. For the evaluation of the mechanical behavior, tests were performed in the hardened state concerning the flexural and compressive strength and adhesion test between the grout and the brick.
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Palavras-chave
Injeção de paredes Alvenaria antiga Caldas à base de cal Aderência Durabilidade