Effect of hybrid fibers on flexural toughness and deformation resistance of OPC-CSA composite formwork shell concrete
REN Haitao
HE Juan
FU Qinglu
WU Jiahan
GUO Zhenfeng
WU Yonghua
Abstract：The effect of fiber type and content on flexural toughness and deformation resistance of Formwork shell concrete(FSC)was studied when steel fiber(SF)was used alone or in combination with polypropylene(PP)fiber and polyvinyl alcohol(PVA)fiber.The hybrid and toughening effects of SF and organic fiber were analyzed.The results show that the effect of organic fiber with high content(0.50%)SF on the toughness and deformation resistance of FSC is better than that of mixing with low content(0.30%)SF.The flexural toughness of FSC was significantly improved by SF-PP fiber hybrid,while the deformation resistance of FSC was significantly improved by SF-PVA fiber hybrid.The optimal bending strength of FSC with SF-PP fiber hybrid at 7 days and 28 days can achieve 8.9 MPa and 11.8 MPa,which is 21.9%and 9.3%higher than that of single SF.The optimal elastic modulus of FSC with SF-PVA fiber hybrid at 7 days and 28 days can achieve 20.9 GPa and 41.2 GPa,which is 13.6%and 13.2%higher than that of single SF,respectively.
Keywords：formwork shell concretesteel fiberorganic fiberflexural toughnessdeformation resistance
Publication Date：2026-02-25
Online Publishing Date：2026-03-25(First online date of this platform, not the publication date of the document)
Pages：7( 49-55 )