Título: | FRACTURE BEHAVIOR OF CEMENTITIOUS MATRIX COMPOSITES REINFORCED BY BAMBOO PULP | ||||||||||||||||||||||||||||||||||||
Autor: |
JANAINA BRESCANSIN |
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Colaborador(es): |
FATHI AREF IBRAHIM DARWISH - Orientador KHOSROW GHAVAMI - Coorientador |
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Catalogação: | 15/JUL/2003 | Língua(s): | PORTUGUESE - BRAZIL |
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Tipo: | TEXT | Subtipo: | THESIS | ||||||||||||||||||||||||||||||||||
Notas: |
[pt] Todos os dados constantes dos documentos são de inteira responsabilidade de seus autores. Os dados utilizados nas descrições dos documentos estão em conformidade com os sistemas da administração da PUC-Rio. [en] All data contained in the documents are the sole responsibility of the authors. The data used in the descriptions of the documents are in conformity with the systems of the administration of PUC-Rio. |
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Referência(s): |
[pt] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=3720&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=3720&idi=2 |
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DOI: | https://doi.org/10.17771/PUCRio.acad.3720 | ||||||||||||||||||||||||||||||||||||
Resumo: | |||||||||||||||||||||||||||||||||||||
As handling and manipulation of asbestos pose grave health
hazards, its use in civil construction has been drastically
dwindling and will in fact be completely prohibited, in a
few years, in developed countries. With the need arising to
find an adequate substitute, vegetable fibers and
cellulosic pulps have been considered to be viable
alternatives. Taking into account the fact that the process
for pulp production entails the removal of impurities, such
as lignin and hemicellulose, cellulosic pulps seem to be
the ideal substitute to asbestos, as their use does not
necessitate modifications in the cementitious matrix.
Accordingly, the purpose of this work is to experimentally
determine basic mechanical characteristics and pertinent
fracture parameters of bamboo pulp reinforced cement.
Refined and non-refined pulps were used in the proportions
of 8 and 14 percent of the weight of dry cement. These
percentages were adopted as they imply, according to
literature, in optimizing the energy absorbed by the
composite in bend loading. Evaluation of the mechanical
behavior of the composites considered in this work was
realized by means of compression and impact testing. Three
point bend tests were also carried out using unnotched as
well as notched specimens of different notch root radii.
Mechanical properties such as modulus of elasticity,
compressive, impact and bend strengths, and J integral at
maximum load are presented and discussed in terms of
pertinent microstructural and fractographic aspects of test
specimens.
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