Powered by OpenAIRE graph
Found an issue? Give us feedback
image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ uBibliorum Repositor...arrow_drop_down
image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
versions View all 1 versions
addClaim

Comportamento reológico e mecânico de argamassas com agregados finos reciclados de resíduos de vidro

Authors: Peixeiro, Tomás Fidalgo;

Comportamento reológico e mecânico de argamassas com agregados finos reciclados de resíduos de vidro

Abstract

As argamassas desempenham um papel bastante importante na construção. As suas propriedades tanto no estado fresco como no estado endurecido merecem ser foco de estudo para que estas se tornem cada vez mais eficientes, seja a nível de segurança, de funcionalidade ou de economia. De forma a melhorar a economia deste material, a substituição de agregados finos de areia natural por agregados finos reciclados de resíduos de vidro apresenta-se como uma solução sustentável tanto a nível económico como ambiental. No presente trabalho estuda-se a influência da introdução destes agregados no desempenho mecânico e reológico das argamassas. Para o estudo do comportamento mecânico e reológico das argamassas com substituição de agregados finos de areia natural por agregados finos de vidro reciclado foi utilizada uma argamassa de referência com agregados finos convencionais de traço em massa cimento:areia de 1:3 (cimento Portland CEM I 32,5R e areia natural do rio Tejo 0/4) cuja quantidade de água foi ajustada para se obter a consistência pretendida no ensaio de consistência (flow table). Mantendo as mesmas proporções, foram depois criadas argamassas com substituições de 50%, 75% e 100% de agregados finos de areia natural por agregados finos reciclados de vidro. O estudo das argamassas no estado fresco foi feito através dos ensaios de consistência por espalhamento ou flow table, do ensaio de massa volúmica aparente e do ensaio reológico com recurso ao Reómetro Viskomat NT. Já no estado endurecido os ensaios realizados foram o ensaio de ultrassons, de resistência mecânica à flexão e a compressão, de absorção de água por capilaridade, de massa volúmica e de absorção de água. A substituição de agregados finos de areia natural por agregados finos de vidro reciclado torna as argamassas mais fluídas e menos consistentes, pelo que se deve ter em atenção a quantidade de água e se necessário aumentá-la. No estado endurecido, as argamassas com agregados de vidro apresentam um desempenho mecânico aceitável e dentro das normas. Porém, observou-se maiores valores de absorção de água e de coeficiente de capilaridade.

Mortars play a very important role in construction. The study of their properties both in their fresh state and hardened state deserves to be focus of study so that these became increasingly efficient whether on safety, functionality or economy. In order to make mortars that are more economical, the replacement of fine sand aggregates with fine recycled glass aggregates presents itself as a sustainable solution on economic and environmental levels. In this work is aimed to study the influence of the introduction of this aggregates on the mechanical and rheological behavior of mortars. To study the mechanical and rheological behavior of mortars with a percentage of fine sand aggregates replaced by fine recycled glass aggregates, it has been created a reference mortar without any glass aggregates. It has a ratio of cement:sand of 1:3 (Portland cement CEM I 32,5R and natural sand 0/4 from river Tejo) whose amount of water has been adjusted to obtain the desire consistency on the flow table test. Keeping the same proportions, were created mortars with 50%, 75% and 100% of fine sand aggregates replaced by fine recycled glass aggregates. The study of mortars on their fresh state was made through the tests of flow table, apparent density and rheological test using the Rheometer Viskomat NT. On the hardened state of mortars, the tests that were made were the ultrasonic test, flexure and compressive strengths, water absorption by capillarity, density and water absorption. The replacement of fine sand aggregates with fine recycled glass aggregates makes mortars more fluid and less consistent, so it should be taken in account the amount of water and increase it if necessary. On the hardened state, mortars with glass aggregates have a decent mechanical performance within regulations. It has been observed an increase in the values of water absortion and capillarity coefficient.

Country
Portugal
Related Organizations
Keywords

Domínio/Área Científica::Engenharia e Tecnologia::Engenharia Civil, Comportamento Mecânico., Argamassa, Comportamento Mecânico, Areia Natural, Agregados Finos Reciclados de Vidro, Reologia

  • BIP!
    Impact byBIP!
    selected citations
    These citations are derived from selected sources.
    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    0
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Average
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Average
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Average
    OpenAIRE UsageCounts
    Usage byUsageCounts
    visibility views 28
    download downloads 32
  • 28
    views
    32
    downloads
    Powered byOpenAIRE UsageCounts
Powered by OpenAIRE graph
Found an issue? Give us feedback
visibility
download
selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
views
OpenAIRE UsageCountsViews provided by UsageCounts
downloads
OpenAIRE UsageCountsDownloads provided by UsageCounts
0
Average
Average
Average
28
32
Green