Open AccessTensile Properties of HDCC for Repairing Hydraulic Discharge Structures
Author(s) -
Bin Chen,
Liping Guo,
Zheng-Kai Chen,
Cong Ding
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/678/1/012105
Subject(s) - ultimate tensile strength , materials science , composite material , cracking , ductility (earth science) , polyvinyl alcohol , stress–strain curve , fiber , tensile strain , stress (linguistics) , deformation (meteorology) , creep , linguistics , philosophy
To develop high ductility cementitious composites (HDCC) for repairing hydraulic discharge structures, the effect of water-binder ratio, polyvinyl alcohol (PVA) fiber content, and fly ash content on the tensile properties of HDCC was studied. The results show that with increase in water-binder ratio and/or fly ash content, the ultimate tensile strain of HDCC increases gradually, while the ultimate tensile stress and the initial cracking stress decrease. With different fiber contents, the tensile stress-strain curves of HDCC coincide in the linear elastic stage, and the initial cracking stresses are roughly the same; with increase in fiber content, the ultimate tensile strain and ultimate tensile strength increase gradually. Based on these results, the appropriate mix proportions for the HDCC material were determined for repairing hydraulic discharge structures.