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Authors
Abstract(s)
O presente trabalho avalia o efeito da incorporação de terra diatomácea residual (TDR), um subproduto da indústria vinícola, nas propriedades mecânicas de argamassas. Foram realizados três tipos de composições: uma com substituição de 15% de cimento por TDR, outra com substituição de 5% de areia por TDR e uma outra composição de referência sem adição de TDR. A terra diatomácea (TD), após ser utilizada na filtração do vinho até sua saturação, foi calcinada, em forno, para eliminar a matéria orgânica e posteriormente
incorporada na composição da argamassa. Em que as argamassas desenvolvidas foram submetidas a ensaios de consistência, de resistência à flexão, de resistência à compressão, de aderência e de absorção por imersão e capilaridade. Os resultados obtidos foram comparados com aos da argamassa de referência.
Os ensaios de flexão e compressão foram realizados aos 7, 28, 90 e 180 dias de cura. Os resultados mostram que com a introdução de TDR na argamassa levou a um acréscimo na resistência à tensão por flexão em 27,4% e 46,6% nas amostras com substituição de cimento e areia respectivamente. A resistência à compressão apresentou um comportamento semelhante, com um acréscimo a tensão máxima de 22,7% e 70,1% nas amostras com substituição de cimento e areia respectivamente, também aos 180 dias de cura. O coeficiente de absorção para as amostras com substituição de cimento foi 35,8% maior, já as argamassas com substituição de areia diminuíram cerca de 32,6%, ambas em relação a argamassa de referência, sendo que, um baixo coeficiente de absorção significa uma provável maior durabilidade do material. Na resistência a aderência por tração houve uma redução de 40,0% na amostra com substituição de cimento e redução de 88,7% na com redução de areia.
This work evaluates the effect of incorporating residual diatomaceous earth (TDR), a by-product of the wine industry, on the mechanical properties of mortars. Three types of compositions performed: one with 15% replacement of cement by TDR, another with 5% replacement of sand by TDR and another reference composition without addition of TDR. The diatomaceous earth (TD), after being used in the filtration of wine until its saturation, was calcined in an oven to eliminate organic matter and then incorporated in the composition of the mortar. In which the mortars were submitted to tests of consistency, resistance to flexion, resistance to compression, adhesion and absorption by immersion and capillarity. The results obtained were compared with those of the reference mortar. The flexural and compression tests were carried out at 7, 28, 90 and 180 days of curing. The results show that with the introduction of TDR in the mortar led to an increase in the flexural stress resistance by 27.4% and 46.6% in the samples with cement and sand replacement respectively. The compressive strength showed a similar behavior, with an increase in the maximum stress of 22.7% and 70.1% in the samples with cement and sand replacement respectively, also at 180 days of curing. The absorption coefficient for the samples with cement replacement was 35.8% higher, while the mortars with sand replacement decreased by about 32.6%, both in relation to the reference mortar, being that, a low absorption coefficient means a probable greater durability of the material. In the tensile bond strength there was a reduction of 40,0% in the sample with cement replacement and reduction of 88.7% in the one with sand reduction.
This work evaluates the effect of incorporating residual diatomaceous earth (TDR), a by-product of the wine industry, on the mechanical properties of mortars. Three types of compositions performed: one with 15% replacement of cement by TDR, another with 5% replacement of sand by TDR and another reference composition without addition of TDR. The diatomaceous earth (TD), after being used in the filtration of wine until its saturation, was calcined in an oven to eliminate organic matter and then incorporated in the composition of the mortar. In which the mortars were submitted to tests of consistency, resistance to flexion, resistance to compression, adhesion and absorption by immersion and capillarity. The results obtained were compared with those of the reference mortar. The flexural and compression tests were carried out at 7, 28, 90 and 180 days of curing. The results show that with the introduction of TDR in the mortar led to an increase in the flexural stress resistance by 27.4% and 46.6% in the samples with cement and sand replacement respectively. The compressive strength showed a similar behavior, with an increase in the maximum stress of 22.7% and 70.1% in the samples with cement and sand replacement respectively, also at 180 days of curing. The absorption coefficient for the samples with cement replacement was 35.8% higher, while the mortars with sand replacement decreased by about 32.6%, both in relation to the reference mortar, being that, a low absorption coefficient means a probable greater durability of the material. In the tensile bond strength there was a reduction of 40,0% in the sample with cement replacement and reduction of 88.7% in the one with sand reduction.
Description
Mestrado de dupla diplomação com a UTFPR - Universidade Tecnológica Federal do Paraná
Keywords
Terra diatomácea Argamassa Resíduos Meio-ambiente Compressão Flexão Aderência Absorção Vinho