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 | Acesso ao texto completo restrito à biblioteca da Embrapa Instrumentação. Para informações adicionais entre em contato com cnpdia.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
26/09/2023 |
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Data da última atualização: |
15/01/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
TERRA, I. C. C.; BATISTA, F. G.; SILVA, D. W.; SCATOLINO, M. V.; ALVES JÚNIOR, F. T.; MARTINS, M. A.; MENDES, L. M. |
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Afiliação: |
Department of Forest Science, Federal University of Lavras (UFLA); Department of Forest Science, Federal University of Lavras (UFLA); Department of Production Engineering, State University of Amapá (UEAP); Graduate Program in Development and Environment, Federal University of the Semiarid Region (UFERSA); Department of Production Engineering, State University of Amapá (UEAP); MARIA ALICE MARTINS, CNPDIA; Department of Forest Science, Federal University of Lavras (UFLA). |
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Título: |
Mining waste and coconut fibers as an eco-friendly reinforcement for the production of concrete blocks. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Environmental Science and Pollution Research, v. 30, 2023. 62641?62652 |
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Páginas: |
62641-62652 |
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DOI: |
https://doi.org/10.1007/s11356-023-26493-5 |
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Idioma: |
Inglês |
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Conteúdo: |
Using mineral and agro-industrial wastes associated with the cement matrix can add value and guarantee suitable properties for reinforced composites. This research aimed to evaluate the effect of the incorporation of quartzite and coconut fibers on masonry blocks' physical, mechanical, and thermal properties. Quartzite was evaluated replacing 0%, 25%, 50%, 75%, and 100% of the sand, whereas the coconut fibers were added in a proportion of 2.5% of the volume of gravel. Quartzite residues were analyzed regarding their granulometry, chemical composition, and pozzolanicity. The block initial formulation (control) was: 8.2% cement, 45.9% sand, and 45.9% gravel. The cement was cured at room temperature for 28 days. Subsequently, the blocks were subjected to the characterization of physical, mechanical, and thermal properties. Coconut fibers presented a low percentage of extractives, with a low inhibition index (1.93%), reducing their effect on cement hardening. The increase in the content of quartzite incorporated provided a reduction in bulk density and an increase in porosity (from 11.7 to 16.0%) and water absorption after 24 h (from 7.0 to 8.5%). The compressive strength was reduced from 50% with the insertion of the quartzite. The quartzite and coconut fibers reduced the concrete's thermal conductivity, providing essential reflections for the performance of the blocks in terms of thermal comfort in built environments. Further, incorporating these materials provided the potential to obtain blocks with characteristics of resistance and offering possible thermal comfort, besides contributing as an option for a destination for these mineral and agro-industrial wastes. MenosUsing mineral and agro-industrial wastes associated with the cement matrix can add value and guarantee suitable properties for reinforced composites. This research aimed to evaluate the effect of the incorporation of quartzite and coconut fibers on masonry blocks' physical, mechanical, and thermal properties. Quartzite was evaluated replacing 0%, 25%, 50%, 75%, and 100% of the sand, whereas the coconut fibers were added in a proportion of 2.5% of the volume of gravel. Quartzite residues were analyzed regarding their granulometry, chemical composition, and pozzolanicity. The block initial formulation (control) was: 8.2% cement, 45.9% sand, and 45.9% gravel. The cement was cured at room temperature for 28 days. Subsequently, the blocks were subjected to the characterization of physical, mechanical, and thermal properties. Coconut fibers presented a low percentage of extractives, with a low inhibition index (1.93%), reducing their effect on cement hardening. The increase in the content of quartzite incorporated provided a reduction in bulk density and an increase in porosity (from 11.7 to 16.0%) and water absorption after 24 h (from 7.0 to 8.5%). The compressive strength was reduced from 50% with the insertion of the quartzite. The quartzite and coconut fibers reduced the concrete's thermal conductivity, providing essential reflections for the performance of the blocks in terms of thermal comfort in built environments. Further, incorporating these materials provided the potenti... Mostrar Tudo |
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Palavras-Chave: |
Block characterization; Composite; Lignocellulosic fibers; Mining wastes; Quartzite. |
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Categoria do assunto: |
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Marc: |
LEADER 02555naa a2200277 a 4500
001 2156900
005 2024-01-15
008 2023 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1007/s11356-023-26493-5$2DOI
100 1 $aTERRA, I. C. C.
245 $aMining waste and coconut fibers as an eco-friendly reinforcement for the production of concrete blocks.$h[electronic resource]
260 $c2023
300 $a62641-62652
520 $aUsing mineral and agro-industrial wastes associated with the cement matrix can add value and guarantee suitable properties for reinforced composites. This research aimed to evaluate the effect of the incorporation of quartzite and coconut fibers on masonry blocks' physical, mechanical, and thermal properties. Quartzite was evaluated replacing 0%, 25%, 50%, 75%, and 100% of the sand, whereas the coconut fibers were added in a proportion of 2.5% of the volume of gravel. Quartzite residues were analyzed regarding their granulometry, chemical composition, and pozzolanicity. The block initial formulation (control) was: 8.2% cement, 45.9% sand, and 45.9% gravel. The cement was cured at room temperature for 28 days. Subsequently, the blocks were subjected to the characterization of physical, mechanical, and thermal properties. Coconut fibers presented a low percentage of extractives, with a low inhibition index (1.93%), reducing their effect on cement hardening. The increase in the content of quartzite incorporated provided a reduction in bulk density and an increase in porosity (from 11.7 to 16.0%) and water absorption after 24 h (from 7.0 to 8.5%). The compressive strength was reduced from 50% with the insertion of the quartzite. The quartzite and coconut fibers reduced the concrete's thermal conductivity, providing essential reflections for the performance of the blocks in terms of thermal comfort in built environments. Further, incorporating these materials provided the potential to obtain blocks with characteristics of resistance and offering possible thermal comfort, besides contributing as an option for a destination for these mineral and agro-industrial wastes.
653 $aBlock characterization
653 $aComposite
653 $aLignocellulosic fibers
653 $aMining wastes
653 $aQuartzite
700 1 $aBATISTA, F. G.
700 1 $aSILVA, D. W.
700 1 $aSCATOLINO, M. V.
700 1 $aALVES JÚNIOR, F. T.
700 1 $aMARTINS, M. A.
700 1 $aMENDES, L. M.
773 $tEnvironmental Science and Pollution Research$gv. 30, 2023. 62641?62652
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Registro original: |
Embrapa Instrumentação (CNPDIA) |
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Biblioteca |
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Tipo/Formato |
Classificação |
Cutter |
Registro |
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Registro Completo
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Biblioteca(s): |
Embrapa Agricultura Digital; Embrapa Gado de Corte. |
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Data corrente: |
06/12/2016 |
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Data da última atualização: |
21/01/2020 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
SANTOS, J. C. dos; SENA, A. L. dos S.; BARIONI, L. G.; DIAS, F. R. T.; MOREIRA, J. M. M. A. P.; COSTA, F. P.; FASIABEN, M. do C. R. |
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Afiliação: |
JAIR CARVALHO DOS SANTOS, CPATU; ANA LAURA DOS SANTOS SENA, CPATU; LUIS GUSTAVO BARIONI, CNPTIA; FERNANDO RODRIGUES TEIXEIRA DIAS, CPAP; JOSE MAURO M AVILA PAZ MOREIRA, CNPF; FERNANDO PAIM COSTA, CNPGC; MARIA DO CARMO RAMOS FASIABEN, CNPTIA. |
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Título: |
Tradeoff between profitability and GHG emissions by beef cattle systems in Brazilian Amazon. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
In: INTERNATIONAL SYMPOSIUM ON GREENHOUSE GASES IN AGRICULTURE, 2., 2016, Campo Grande, MS. Proceedings... Brasília, DF: Embrapa, 2016. |
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Páginas: |
p. 394-398. |
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Série: |
(Embrapa Gado de Corte. Documentos, 216). |
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ISSN: |
1983-974X |
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Idioma: |
Inglês |
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Notas: |
Coordenador: Roberto Giolo de Almeida. II SIGEE. |
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Conteúdo: |
The debate on the relationship between human activities and the growth in the emissions of carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) into the atmosphere has brought the need to study more deeply the relationship between productive activities and the emission of these greenhouse gases (GHG) (FAO, 2013). Thus, the definition of what changes should be implemented in the production process aiming to reduce GHG emissions level should also consider the economic and social sustainability of the activity (SILVA et al, 2016). Beef cattle in Amazon, as in most of Brazil, is also predominantly developed in an extensive manner (ALVIM et al, 2015). The North Region had in 2014 a cattle herd of 45,826,142 beef heads, which represented 22% of the whole national herd, with emphasis to State of Pará with 19,911,217 - 43% of the regional cattle (IBGE, 2016). The study on the effects of this activity on the environment and the search for alternatives to mitigate the negative impacts will enable the development of more sustainable livestock. The increase in the adoption of more sustainable livestock systems, especially from an environmental point of view depends on the establishment of incentives to producers and, therefore, it is essential to identify models which present these virtuous characteristics, as well as economic performance, in order to define strategies for this combination. |
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Palavras-Chave: |
Emissão de gases do efeito estufa; Rentabilidade do comércio. |
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Thesagro: |
Gado de corte; Sistema de produção. |
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Thesaurus NAL: |
Beef cattle; Greenhouse gas emissions; Profitability; Trade. |
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Categoria do assunto: |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/151250/1/p398-402.pdf
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Marc: |
LEADER 02530nam a2200325 a 4500
001 2057982
005 2020-01-21
008 2016 bl uuuu u01u1 u #d
022 $a1983-974X
100 1 $aSANTOS, J. C. dos
245 $aTradeoff between profitability and GHG emissions by beef cattle systems in Brazilian Amazon.$h[electronic resource]
260 $aIn: INTERNATIONAL SYMPOSIUM ON GREENHOUSE GASES IN AGRICULTURE, 2., 2016, Campo Grande, MS. Proceedings... Brasília, DF: Embrapa$c2016
300 $ap. 394-398.
490 $a(Embrapa Gado de Corte. Documentos, 216).
500 $aCoordenador: Roberto Giolo de Almeida. II SIGEE.
520 $aThe debate on the relationship between human activities and the growth in the emissions of carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) into the atmosphere has brought the need to study more deeply the relationship between productive activities and the emission of these greenhouse gases (GHG) (FAO, 2013). Thus, the definition of what changes should be implemented in the production process aiming to reduce GHG emissions level should also consider the economic and social sustainability of the activity (SILVA et al, 2016). Beef cattle in Amazon, as in most of Brazil, is also predominantly developed in an extensive manner (ALVIM et al, 2015). The North Region had in 2014 a cattle herd of 45,826,142 beef heads, which represented 22% of the whole national herd, with emphasis to State of Pará with 19,911,217 - 43% of the regional cattle (IBGE, 2016). The study on the effects of this activity on the environment and the search for alternatives to mitigate the negative impacts will enable the development of more sustainable livestock. The increase in the adoption of more sustainable livestock systems, especially from an environmental point of view depends on the establishment of incentives to producers and, therefore, it is essential to identify models which present these virtuous characteristics, as well as economic performance, in order to define strategies for this combination.
650 $aBeef cattle
650 $aGreenhouse gas emissions
650 $aProfitability
650 $aTrade
650 $aGado de corte
650 $aSistema de produção
653 $aEmissão de gases do efeito estufa
653 $aRentabilidade do comércio
700 1 $aSENA, A. L. dos S.
700 1 $aBARIONI, L. G.
700 1 $aDIAS, F. R. T.
700 1 $aMOREIRA, J. M. M. A. P.
700 1 $aCOSTA, F. P.
700 1 $aFASIABEN, M. do C. R.
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