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| Registros recuperados : 349 | |
| 83. |  | TRUGILHO, P. F.; SILVA, J. R. M. da; MORI, F. A.; LIMA, J. T.; MENDES, L. M.; MENDES, L. F. de B. Rendimentos e características do carvão vegetal em função da posição radial de amostragem em clones de Eucalyptus. Cerne, Lavras, v. 11, n. 2, p. 178-186, abr./jun. 2005.| Biblioteca(s): Embrapa Florestas. |
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| 86. | | MENDES, L. da S.; PEREIRA, R. B.; AMARO, G. B.; PINHEIRO, J. B. Reação de cultivares de batata-doceao mal-do-pé. In: JORNADA CIENTÍFICA DA EMBRAPA HORTALIÇAS, 2., 2012, Brasília, DF. [Resumos...]. Brasília, DF: Embrapa Hortaliças, 2012. 1 CD-ROM.| Biblioteca(s): Embrapa Hortaliças. |
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| 87. | | PEREIRA, R. B.; MENDES, L. S.; AMARO, G. B.; PINHEIRO, J. B. Reaction of sweet potato cultivars to foot-rot (Plenodomus destruens). In: INTERNATIONAL SYMPOSIUM ON SEED, TRANSPLANT AND STAND ESTABLISHMENT OS HORTICULTURAL CROPS: SOWING THE FUTURE OF TROPICAL HORTICULTURE, 6., 2012, Brasília, DF. Abstracts... Brasília, DF: Embrapa, 2012. p.93. Abstract 39.| Biblioteca(s): Embrapa Hortaliças. |
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| 88. | | MENDES, L. da S.; PEREIRA, R. B.; CARVAL, A. D. F. de; PINHEIRO, J. B. Rendimento agronômico e tolerância à queima-das-folhas em híbridos experimentais de cenoura. In: JORNADA CIENTÍFICA DA EMBRAPA HORTALIÇAS, 2., 2012, Brasília, DF. [Resumos...]. Brasília, DF: Embrapa Hortaliças, 2012. 1 CD-ROM.| Biblioteca(s): Embrapa Hortaliças. |
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| 89. | | IWAKIRI, S.; CUNHA, A. B. da; ALBUQUERQUE, C. E. C.; GORNIAK, E.; MENDES, L. M. Residuos de serrarias na producao de paineis de madeira aglomerada de eucalipto. Scientia Agraria, Curitiba, v. 1, n. 1-2, p. 23-28, 2000.| Biblioteca(s): Embrapa Florestas. |
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| 90. | | FLORES, S. W. S.; MENDES, L. W.; CHIARAMONTE, J. B.; MENDES, R. Rhizosphere bacterial community composition in wild and modern common bean. Hechos Microbiológicos, v. 5, n. 2, p. 156, 2014. Suplemento. Edição das Memorias do 22º Congreso Latinoamericano de Microbiologia e 4º Congreso Colombiano de Microbiologia, Cartagena, 2014. Ref. TLP-398.| Biblioteca(s): Embrapa Meio Ambiente. |
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| 95. | | MENDES, L. D.; BRESOLIN, J. D.; ASSIS, O. B. G. de; BRITTO, D. Atividade inibitória da quitosana e de seu derivado quaternizado TMQ sobre o crescimento do fungo Penicillium expansum. In: WORKSHOP DA REDE DE NANOTECNOLOGIA APLICADA AO AGRONEGÓCIO, 9., 2017, São Carlos. Anais ... São Carlos: Embrapa Instrumentação, 2017. p.184-187. Editores: Caue Ribeiro de Oliveira, Elaine Cristina Paris, Luiz Henrique Capparelli Mattoso, Marcelo Porto Bemquerer, Maria Alice Martins, Odílio Benedito Garrido de Assis.| Biblioteca(s): Embrapa Instrumentação. |
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| 100. | | PEIRÓ, J. R.; MENDES, L. C. N.; FEITOSA, F. L. F. Hérnia inguino-escrotal encarcerada em ovino. In: CONGRESSO LATINOAMERICANO DE BUIATRIA, 11.; CONGRESSO BRASILEIRO DE BUIATRIA, 5.; CONGRESSO NORDESTINO DE BUIATRIA, 3., 2003, Salvador. Sanidade, base da economia pecuária: programa final: livro de resumos. Salvador: Associação Brasileira de Buiatria, 2003. p. 94. ref. 231.| Biblioteca(s): Embrapa Caprinos e Ovinos. |
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| Registros recuperados : 349 | |
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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
|
Biblioteca(s): |
Embrapa Instrumentação. |
|
Data corrente: |
23/09/2021 |
|
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 |
|
Autoria: |
SILVA, D. W.; BUFALINO, L.; MARTINS, M. A.; SAVASTANO JÚNIOR, H.; TONOLI, G. H. D.; MENDES, L. M. |
|
Afiliação: |
MARIA ALICE MARTINS, CNPDIA. |
|
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 |
|
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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