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Registro Completo |
Biblioteca(s): |
Embrapa Instrumentação. |
Data corrente: |
23/09/2021 |
Data da última atualização: |
10/06/2022 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
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. |
Ano de publicação: |
2021 |
Fonte/Imprenta: |
Journal of Building Engineering, v. 43, 103130, 2021. |
Páginas: |
1 - 7 |
ISSN: |
2352-7102 |
DOI: |
https://doi.org/10.1016/j.jobe.2021.103130 |
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. |
Palavras-Chave: |
Air-entraining; Cement materials. |
Categoria do assunto: |
-- |
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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Biblioteca(s): |
Embrapa Gado de Leite. |
Data corrente: |
18/12/2012 |
Data da última atualização: |
23/02/2024 |
Tipo da produção científica: |
Artigo em Anais de Congresso |
Autoria: |
PAIVA, C. A. V.; CERQUEIRA, M.; SOUZA, M.; LANA, A. |
Afiliação: |
CLAUDIO ANTONIO VERSIANI PAIVA, CNPGL; MONICA CERQUEIRA, UFMG; MARCELO SOUZA, UFMG; ANGELA LANA, UFMG. |
Título: |
Evolução anual da contagem de células somáticas do leite cru refrigerado processado em uma indústria de Minas Gerais. |
Ano de publicação: |
2012 |
Fonte/Imprenta: |
In: CONGRESSO INTERNACIONAL DO LEITE, 11.; WORKSHOP DE POLÍTICAS PÚBLICAS, 11.; SIMPÓSIO DE SUSTENTABILIDADE DA ATIVIDADE LEITEIRA, 12., 2012, Goiânia. Anais... Juiz de Fora: Embrapa Gado de Leite, 2012. |
Idioma: |
Português |
Palavras-Chave: |
Contagem de celulas somaticas; IN 51. |
Thesagro: |
Leite. |
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/942948/1/Evolucaoo-anual-da-contagem-de-celulas-somaticas-do-leite-cru.pdf
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Marc: |
LEADER 00710nam a2200169 a 4500 001 1942948 005 2024-02-23 008 2012 bl uuuu u00u1 u #d 100 1 $aPAIVA, C. A. V. 245 $aEvolução anual da contagem de células somáticas do leite cru refrigerado processado em uma indústria de Minas Gerais.$h[electronic resource] 260 $aIn: CONGRESSO INTERNACIONAL DO LEITE, 11.; WORKSHOP DE POLÍTICAS PÚBLICAS, 11.; SIMPÓSIO DE SUSTENTABILIDADE DA ATIVIDADE LEITEIRA, 12., 2012, Goiânia. Anais... Juiz de Fora: Embrapa Gado de Leite$c2012 650 $aLeite 653 $aContagem de celulas somaticas 653 $aIN 51 700 1 $aCERQUEIRA, M. 700 1 $aSOUZA, M. 700 1 $aLANA, A.
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