Fracture Toughness of Nano-SiO2 and Steel Fiber Reinforced Concrete
ZHANG Peng
LI Qingfu
ZHU Haitang
ZHANG Tianhang
Abstract：The effects of nano-SiO2 mass fraction,steel fiber volume fraction,notch depth on fracture parameters and load-deflection curves of the nano-SiO2 and steel fiber reinforced concrete specimens were investigated and analyzed through the three-point bending test.The results indicate that the addition of nano-SiO2 and steel fiber can improve the fracture toughness of the specimens with the appropriate fraction.When nano-SiO2 mass fraction is less than 5 ％,the fracture toughness is increased gradually with the increase of nano-SiO2 mass fraction.While,the fracture toughness begins to decrease with the increase of nano-SiO2 mass fraction after nano-SiO2 mass fraction exceeds 5 ％.With the increase of steel fiber volume fraction,the fracture toughness is increased.The fracture toughness of the specimens decreases with the increase of the notch depth.
Keywords：concretesteel fibernano-SiO2fracture toughness
Publication Date：2017-05-02
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 366-372 )