Fracture behavior of polymeric fiber reinforced lightweight structural concrete
AUTOR(ES)
Freitas, Itamar de, Darwish, Fathi, Pereira, Marcos Venicius, Allende, Katia
FONTE
Mat. Res.
DATA DE PUBLICAÇÃO
2014-12
RESUMO
A study has been made of the effect of short randomly dispersed polypropylene fibers on the fracture behavior of lightweight structural concrete. Using unnotched and precracked beams subjected to bend loading, it was possible to determine the toughness factor TF and to estimate specific J integral parameters, namely J IC and J MAX corresponding to the onset of fracture initiation and to the attainment of ultimate load, respectively. The results have indicated a considerable improvement in the fracture behavior associated with the presence of fibers. More specifically this improvement was manifested by a 400% increase in both TF and J IC.
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