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- W2806711558 abstract "In Recife Metropolitan Region (RMR), there are thousands of buildings made of non-structural masonry dating from the 1960s, however performing as structural masonry. These four-floor buildings best known as “caixao” were mostly conceived with ceramic bricks horizontally perforated. This kind of masonry does not supply technical requirements and does not perform appropriately to be considered structural. It does not fulfill normative criteria because structural calculus shows that its resistance to compression does not suffice. This consequently leads to high levels of pathologies and premature aging of buildings. The relationship between the quantity of “caixao” buildings in RMR and the number of accidents they are involved in indicates that the probability of failure is about 1:500. This rate is much above the acceptable standard of 1:10.000 concerning human lives safety. Over the past thirty years, 12 “caixao” buildings tumbled down in RMR, causing 12 deaths. It is, thus, relevant to develop a solution for reinforcing these buildings, where approximately 250.000 people live. This study aims to evaluate the use of reinforced mortar and metakaolin addition for reinforcing masonry in order to increase its resistance to compression, ductility and durability. In this research, we shaped sample prisms with and without reinforcement on both mortar and non-mortar substratum. The reinforcement consisted of a layer of mortar with a steel lattice on both faces connected by steel connectors as well as addition of 15% of metakaolin, partly replaced with cement by pure addition, following the volume proportions of 1:1:6:1,5 and 1:0,5:4,5:1,5 (cement, lime, sand, water/cement relation). Conclusively, our proposal substantially increased the masonry resistance to compression, considering the reduction factor due to the buckling effect, providing it with ductility, that is, plastic deformation and tenacity. Additionally, we found that the metakaolin contributes to masonry durability by doing specific experiments of mechanical resistance, elasticity modulus, ultrasound, and absorption by immersion as well as accelerated experiments of carbonation and chlorides." @default.
- W2806711558 created "2018-06-13" @default.
- W2806711558 creator A5015678156 @default.
- W2806711558 date "2015-11-15" @default.
- W2806711558 modified "2023-09-23" @default.
- W2806711558 title "Reforço de Alvenira Resistente com Argamassa Armada com Adição de Metaculim" @default.
- W2806711558 hasPublicationYear "2015" @default.
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