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Registro Completo |
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Biblioteca(s): |
Embrapa Rondônia. |
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Data corrente: |
13/03/2024 |
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Data da última atualização: |
13/03/2024 |
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Tipo da produção científica: |
Capítulo em Livro Técnico-Científico |
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Autoria: |
VIEIRA, A. H.; MARTINS, E. P.; LOCATELLI, M.; BENTES-GAMA, M. de M. |
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Afiliação: |
ABADIO HERMES VIEIRA, CPAF-RO; EUGÊNIO PACELLI MARTINS, SECRETARIA DE DESENVOLVIMENTO AMBIENTAL DO ESTADO DE RONDÔNIA; MARILIA LOCATELLI, CPAF-RO; MICHELLINY PINHEIRO DE MATOS BENTES, CPAF-RO. |
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Título: |
Características fenológicas de ucuúba verdadeira (Virola sp.) em Porto Velho, Rondônia. |
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Ano de publicação: |
2007 |
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Fonte/Imprenta: |
In: REGO, G. M.; NEGRELLE, R. R. B.; MORELLATO, L. P. C. (ed.). Fenologia: ferramenta para conservação, melhoramento e manejo de recursos vegetais arbóreos. Colombo: Embrapa Florestas, 2007. |
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Páginas: |
p. 389-390. |
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Idioma: |
Português |
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Conteúdo: |
O presente trabalho teve como objetivo estudar o comportamento fenológico de ucuúba verdadeira (Virola sp.) em Porto Velho, Rondônia |
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Palavras-Chave: |
Amazônia Ocidental; Porto Velho (RO); Rondônia; Western Amazon. |
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Thesagro: |
Fenologia; Ucuuba; Virola sp. |
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Thesaurus Nal: |
Myristicaceae; Phenology. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1162784/1/cpafro-19067.pdf
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Marc: |
LEADER 01050naa a2200277 a 4500
001 2162784
005 2024-03-13
008 2007 bl uuuu u00u1 u #d
100 1 $aVIEIRA, A. H.
245 $aCaracterísticas fenológicas de ucuúba verdadeira (Virola sp.) em Porto Velho, Rondônia.$h[electronic resource]
260 $c2007
300 $ap. 389-390.
520 $aO presente trabalho teve como objetivo estudar o comportamento fenológico de ucuúba verdadeira (Virola sp.) em Porto Velho, Rondônia
650 $aMyristicaceae
650 $aPhenology
650 $aFenologia
650 $aUcuuba
650 $aVirola sp
653 $aAmazônia Ocidental
653 $aPorto Velho (RO)
653 $aRondônia
653 $aWestern Amazon
700 1 $aMARTINS, E. P.
700 1 $aLOCATELLI, M.
700 1 $aBENTES-GAMA, M. de M.
773 $tIn: REGO, G. M.; NEGRELLE, R. R. B.; MORELLATO, L. P. C. (ed.). Fenologia: ferramenta para conservação, melhoramento e manejo de recursos vegetais arbóreos. Colombo: Embrapa Florestas, 2007.
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Registro original: |
Embrapa Rondônia (CPAF-RO) |
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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. |
Registro Completo
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
23/09/2021 |
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Data da última atualização: |
10/06/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 2 |
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Autoria: |
SILVA, D. W.; BUFALINO, L.; MARTINS, M. A.; SAVASTANO JÚNIOR, H.; TONOLI, G. H. D.; MENDES, L. M. |
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Afiliação: |
MARIA ALICE MARTINS, CNPDIA. |
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Título: |
Superabsorbent ability polymer to reduce the bulk density of extruded cement boards. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Journal of Building Engineering, v. 43, 103130, 2021. |
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Páginas: |
1 - 7 |
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ISSN: |
2352-7102 |
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DOI: |
https://doi.org/10.1016/j.jobe.2021.103130 |
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Idioma: |
Inglês |
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Conteúdo: |
The extrusion process has numerous advantages in the production of cement materials; however, cement extruded products over gain bulk density, adding costs to their fixation, workability, and application as structural reinforcement. The objective of this research was to develop and test extruded lightweight cement-based boards with the addition of superabsorbent polymer (SAP). A plain cement board containing 70% of cement and 30% of limestone filler was prepared. The different percentages of SAP from 0.0 to 2.0% based on cement mass did not interfere in the extrusion process. However, an expansion of the cement boards containing 1.0, 1.5, and 2.0% SAP occurred when passing through the extruder nozzle. The apparent porosity increased, and millimetric voids arose in the cement boards by increasing the SAP percentage. The apparent density of the cement boards favorably decreased from 8.6 to 28.4% by adding different percentages of SAP. However, the microstructural modifications raised the water absorption and substantially decreased the mechanical performance. Still, adding only 0.5% of SAP reduced the bulk density by about 10% without substantially decreasing the mechanical performance of the cement boards. Therefore, the SAP was very efficient in producing lightweight cement boards by extrusion. |
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Palavras-Chave: |
Air-entraining; Cement materials. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02035naa a2200241 a 4500
001 2134735
005 2022-06-10
008 2021 bl uuuu u00u1 u #d
022 $a2352-7102
024 7 $ahttps://doi.org/10.1016/j.jobe.2021.103130$2DOI
100 1 $aSILVA, D. W.
245 $aSuperabsorbent ability polymer to reduce the bulk density of extruded cement boards.$h[electronic resource]
260 $c2021
300 $a1 - 7
520 $aThe extrusion process has numerous advantages in the production of cement materials; however, cement extruded products over gain bulk density, adding costs to their fixation, workability, and application as structural reinforcement. The objective of this research was to develop and test extruded lightweight cement-based boards with the addition of superabsorbent polymer (SAP). A plain cement board containing 70% of cement and 30% of limestone filler was prepared. The different percentages of SAP from 0.0 to 2.0% based on cement mass did not interfere in the extrusion process. However, an expansion of the cement boards containing 1.0, 1.5, and 2.0% SAP occurred when passing through the extruder nozzle. The apparent porosity increased, and millimetric voids arose in the cement boards by increasing the SAP percentage. The apparent density of the cement boards favorably decreased from 8.6 to 28.4% by adding different percentages of SAP. However, the microstructural modifications raised the water absorption and substantially decreased the mechanical performance. Still, adding only 0.5% of SAP reduced the bulk density by about 10% without substantially decreasing the mechanical performance of the cement boards. Therefore, the SAP was very efficient in producing lightweight cement boards by extrusion.
653 $aAir-entraining
653 $aCement materials
700 1 $aBUFALINO, L.
700 1 $aMARTINS, M. A.
700 1 $aSAVASTANO JÚNIOR, H.
700 1 $aTONOLI, G. H. D.
700 1 $aMENDES, L. M.
773 $tJournal of Building Engineering$gv. 43, 103130, 2021.
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Embrapa Instrumentação (CNPDIA) |
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