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Authors
Advisor(s)
Abstract(s)
O trabalho de investigação apresentado refere-se à análise do comportamento de betão com a incorporação de um novo material, a qual avalia a resistência mecânica no ensaio de compressão e tece comparações com uma
composição de betão convencional. O ensaio baseou-se em duas composições distintas: na primeira, houve a retirada de cimento e introdução de terra diatomácea residual e na segunda, retirou-se a areia e incorporou-se a terra diatomácea residual. A terra diatomácea residual foi submetida ao processo de calcinação, de modo a retirar toda matéria orgânica e, em seguida, introduzida ao betão para avaliar o comportamento no ensaio à compressão, absorção de água por imersão e capilaridade. Além de uma caracterização química do material após o processo de calcinação, os materiais foram submetidos à análise granulométrica e, em seguida, por meio do método de Faury foi estipulada a percentagem de cada um dos materiais para a produção do betão de referência.
Logo após, por meio de um estudo preliminar com o total de nove composições as quais foram submetidas ao ensaio de compressão aos 7 e 28 dias de cura, três delas que obtiveram destaques no ensaio foram selecionadas para que fosse realizado um estudo mais aprofundado. Sendo assim, foi feita uma extensa
campanha de corpos de prova para analisar a resistência à compressão após 7, 28 e 90 dias de cura. Com o resultado obtido, foi feita uma análise estatística com o auxílio do software RStudio para avaliar matematicamente qual das composições revelou maior destaque no ensaio à compressão. Além de avaliar a resistência mecânica da campanha de corpos de prova, os provetes obtidos também foram submetidas ao ensaio de absorção de água por imersão e por capilaridade, com o intuito de comparar o desfecho das mesmas em relação ao betão de referência. No ensaio à compressão foi obtido resultados superiores para os corpos de prova que continham terra diatomácea residual em sua composição comparado com a composição de referência. Além disso, para os
testes de absorção de água, o resultado também foi benéfico para os corpos de prova que possuíam terra diatomácea residual em sua composição.
The current study is an analysis of the concrete behaviour with the incorporation of a new material, which evaluates the mechanical strength in compression test and makes comparisons with a conventional concrete composition. The test was based on two different compositions: in the first, there was the removal of cement and introduction of residual diatomaceous earth and in the second, sand was removed and residual diatomaceous earth was incorporated. The residual diatomaceous earth was submitted to the calcination process in order to remove all organic matter and then introduced to concrete to evaluate the behaviour in compression test, water absorption by immersion and capillarity. Besides a chemical characterization of the material after the calcination process, the materials were submitted to particle size analysis and then, by means of the Faury method, the percentage of each of the materials for the production of the reference concrete was stipulated. After that, through a preliminary study with a total of nine compositions that were subjected to compression test at 7 and 28 days of curing, three of them that stood out in the test were selected for further study. Thus, a campaign of specimens was made to analyse the compressive strength after 7, 28 and 90 days of curing. With the result obtained, a statistical analysis was performed with the aid of the software RStudio to mathematically evaluate which of the compositions showed greater prominence in the compression test. In addition to evaluating the mechanical strength of the test specimen campaign, the compositions were also subjected to water absorption test by immersion and by capillarity, in order to compare their outcome in relation to the reference concrete. In the compression test, superior results were obtained for the specimens that contained residual diatomaceous earth in its composition compared to the reference composition. Moreover, for the water absorption tests, the result was also beneficial for the specimens that had residual diatomaceous earth in their composition.
The current study is an analysis of the concrete behaviour with the incorporation of a new material, which evaluates the mechanical strength in compression test and makes comparisons with a conventional concrete composition. The test was based on two different compositions: in the first, there was the removal of cement and introduction of residual diatomaceous earth and in the second, sand was removed and residual diatomaceous earth was incorporated. The residual diatomaceous earth was submitted to the calcination process in order to remove all organic matter and then introduced to concrete to evaluate the behaviour in compression test, water absorption by immersion and capillarity. Besides a chemical characterization of the material after the calcination process, the materials were submitted to particle size analysis and then, by means of the Faury method, the percentage of each of the materials for the production of the reference concrete was stipulated. After that, through a preliminary study with a total of nine compositions that were subjected to compression test at 7 and 28 days of curing, three of them that stood out in the test were selected for further study. Thus, a campaign of specimens was made to analyse the compressive strength after 7, 28 and 90 days of curing. With the result obtained, a statistical analysis was performed with the aid of the software RStudio to mathematically evaluate which of the compositions showed greater prominence in the compression test. In addition to evaluating the mechanical strength of the test specimen campaign, the compositions were also subjected to water absorption test by immersion and by capillarity, in order to compare their outcome in relation to the reference concrete. In the compression test, superior results were obtained for the specimens that contained residual diatomaceous earth in its composition compared to the reference composition. Moreover, for the water absorption tests, the result was also beneficial for the specimens that had residual diatomaceous earth in their composition.
Description
Mestrado de dupla diplomação com a UTFPR - Universidade Tecnológica Federal do Paraná
Keywords
Terra diatomácea Valorização de resíduos Ensaios à compressão Ensaios de absorção de água Análise estatística