Accelerated carbonation: state-of-the art of the research in Brazil
The study of the behaviour of concrete in relation to carbonation is undertaken mainly through accelerated tests that demand rigid control o the variables that intervene in the process, but that have low execution costs and short data collection duration. In Brazil, like in other countries, there ha...
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| स्वरूप: | Online |
| भाषा: | por |
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ANTAC - Associação Nacional de Tecnologia do Ambiente Construído
2008
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| ऑनलाइन पहुंच: | https://seer.ufrgs.br/ambienteconstruido/article/view/3750 |
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ojs-article-37502008-11-21T22:59:34Z Accelerated carbonation: state-of-the art of the research in Brazil Carbonatação acelerada: estado da arte das pesquisas no Brasil Pauletti, Cristiane Possan, Edna Dal Molin, Denise Carpena Coitinho Carbonatação acelerada; Carbonatação natural; Métodos de ensaio; Padronização The study of the behaviour of concrete in relation to carbonation is undertaken mainly through accelerated tests that demand rigid control o the variables that intervene in the process, but that have low execution costs and short data collection duration. In Brazil, like in other countries, there has been a large number of research studies that have aimed to improve those tests. However, there is not yet a widely accepted procedure that offers guidelines for its execution. This article presents the state of art of the research that has been developed in Brazil, considering the need to gather efforts on the development of future studies and to establish standardized test procedures. It suggests that there is a need for in-depth studies on carbonation concerned with CO2 concentrations, time and type of curing, and seasoning procedures adopted. For modelling and predicting service life it is also important to investigate the sample size and the exposure time to CO2, as well as to identify correlations between natural and accelerated tests in order to establish acceleration factors. This relationship between the two types of test is very important for understanding the phenomenon and produce guidelines for future definitions of standards. O estudo do comportamento do concreto ante a carbonatação se dá principalmente por meio de ensaios acelerados que, além do rígido controle das variáveis intervenientes no processo, oferecem baixo custo de execução e velocidade na coleta de dados. No Brasil, assim como em outros países, existe um grande número de trabalhos que procuram aperfeiçoar essa técnica, porém ainda não há um procedimento amplamente aceito que ofereça diretrizes para sua elaboração. Por meio deste trabalho, busca-se apresentar o estado da arte das pesquisas realizadas no Brasil, considerando a necessidade de unir esforços na elaboração de trabalhos futuros com vistas à normalização dos procedimentos de ensaio. Para tanto, verifica-se a necessidade de aprofundar os estudos de carbonatação no que se refere aos percentuais de CO2 empregados, ao tempo e tipo de cura e sazonamento utilizados. Para fins de modelagem e previsão de vida útil, é importante investigar, também, o tamanho das amostras e o tempo de exposição ao CO2, assim como fazer correlações entre ensaios naturais e acelerados para estabelecer coeficientes de aceleração . Essa relação entre os dois tipos de ensaio é imperativa no entendimento do fenômeno e também deve gerar subsídios para as futuras definições normativas. ANTAC - Associação Nacional de Tecnologia do Ambiente Construído 2008-04-28 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://seer.ufrgs.br/ambienteconstruido/article/view/3750 Ambiente Construído; v. 7, n. 4 (2007); 7-20 Ambiente Construído; v. 7, n. 4 (2007); 7-20 Ambiente Construído; v. 7, n. 4 (2007); 7-20 1678-8621 1415-8876 por https://seer.ufrgs.br/ambienteconstruido/article/view/3750/2103 Direitos autorais 2016 Ambiente Construído https://creativecommons.org/licenses/by/4.0 |
| institution |
Universidade Federal do Rio Grande do Sul |
| collection |
OJS |
| language |
por |
| format |
Online |
| author |
Pauletti, Cristiane Possan, Edna Dal Molin, Denise Carpena Coitinho |
| spellingShingle |
Pauletti, Cristiane Possan, Edna Dal Molin, Denise Carpena Coitinho Accelerated carbonation: state-of-the art of the research in Brazil |
| author_facet |
Pauletti, Cristiane Possan, Edna Dal Molin, Denise Carpena Coitinho |
| author_sort |
Pauletti, Cristiane |
| title |
Accelerated carbonation: state-of-the art of the research in Brazil |
| title_short |
Accelerated carbonation: state-of-the art of the research in Brazil |
| title_full |
Accelerated carbonation: state-of-the art of the research in Brazil |
| title_fullStr |
Accelerated carbonation: state-of-the art of the research in Brazil |
| title_full_unstemmed |
Accelerated carbonation: state-of-the art of the research in Brazil |
| title_sort |
accelerated carbonation: state-of-the art of the research in brazil |
| description |
The study of the behaviour of concrete in relation to carbonation is undertaken mainly through accelerated tests that demand rigid control o the variables that intervene in the process, but that have low execution costs and short data collection duration. In Brazil, like in other countries, there has been a large number of research studies that have aimed to improve those tests. However, there is not yet a widely accepted procedure that offers guidelines for its execution. This article presents the state of art of the research that has been developed in Brazil, considering the need to gather efforts on the development of future studies and to establish standardized test procedures. It suggests that there is a need for in-depth studies on carbonation concerned with CO2 concentrations, time and type of curing, and seasoning procedures adopted. For modelling and predicting service life it is also important to investigate the sample size and the exposure time to CO2, as well as to identify correlations between natural and accelerated tests in order to establish acceleration factors. This relationship between the two types of test is very important for understanding the phenomenon and produce guidelines for future definitions of standards. |
| publisher |
ANTAC - Associação Nacional de Tecnologia do Ambiente Construído |
| publishDate |
2008 |
| url |
https://seer.ufrgs.br/ambienteconstruido/article/view/3750 |
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