Fracture behavior of polymeric fiber reinforced lightweight structural concrete

Materials Research

Itamar De Freitas²  Fathi Darwish²  Marcos Venicius Pereira¹  Katia Allende² 

[1] ,Fluminense Federal University Department of Civil Engineering Niterói RJ ,Brazil

关键词: lightweight concrete;    fracture initiation;    J integral;    toughness factor;    compressive strength;   

DOI  :  10.1590/1516-1439.287314

来源: SciELO

【 摘 要 】

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.

【 授权许可】

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