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Propriedades mecânicas do betão estrutural reforçado com fibras by Rodolfo Barragan Ramirez, Marcos Alfredo Azuara Hernandez, Enrique Ayala Piñeiro

Propriedades mecânicas do betão estrutural reforçado com fibras

by Rodolfo Barragan Ramirez , Marcos Alfredo Azuara Hernandez , Enrique Ayala Piñeiro
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Book cover type: Paperback
  • ISBN13: 9786209446399
  • Binding: Paperback
  • Subject: N/A
  • Publisher: Edicoes Nosso Conhecimento
  • Publisher Imprint: Edicoes Nosso Conhecimento
  • Publication Date:
  • Pages: 68
  • Original Price: GBP 52.98
  • Language: Portuguese
  • Edition: N/A
  • Item Weight: 105 grams
  • BISAC Subject(s): Environmental / General

A pesquisa analisa o efeito das fibras estruturais sint�ticas (1,5% em volume) nas propriedades f�sicas e mec�nicas do concreto. Foram preparadas misturas com e sem fibras seguindo as normas NMX e o m�todo ACI 211, avaliando-se o abatimento, a massa unit�ria, a temperatura e as resist�ncias � compress�o, � flex�o e � tra��o aos 7, 14, 28 e 45 dias. As fibras reduziram o slump, diminuindo a trabalhabilidade, mas n�o alteraram significativamente a massa unit�ria ou a temperatura, indicando uma mistura mais coesa e resistente � segrega��o. A resist�ncia � compress�o aumentou 10,7% em rela��o ao projeto e 5% em rela��o � mistura sem fibras, devido a uma melhor distribui��o das tens�es. Na flex�o, o aumento foi de 11,6% aos 45 dias, uma vez que as fibras retardam a forma��o de fissuras e permitem tens�es mais elevadas antes da rotura. Na tra��o, o bet�o armado apresentou um aumento m�dio de 9,1%, atingindo 12,1% aos 45 dias, embora o seu efeito seja limitado a cargas elevadas. Palavras-chave: bet�o armado, fibras sint�ticas estruturais, propriedades mec�nicas, resist�ncia, durabilidade.

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