Fracture performance of PVA fiber cementitious composites under freeze-thaw cycles
HUANG Zhi-qiang
XU Guang-jiong
LIU Xin
Abstract：Aiming at the effect of freeze-thaw cycles on the fracture performance of PVA fiber cementitious composites,a three-point bending test method based on the quick freezing method was proposed,the effect of freeze-thaw cycles on the initial fracture toughness,unstable toughness and fracture energy of PVA fiber cementitious composites was studied, and the mass and surface phenomena of specimens after the freeze-thaw cycles were analyzed. The results show that after 250 freeze-thaw cycles,the mass of specimens increases by 1.92%,while the initial fracture toughness,unstable toughness and fracture energy reduce by 37.2%,51.1% and 48.4% respectively. With increasing the freeze-thaw cycles, the mass of specimens shows an increasing trend, the surface damage of specimens is more serious, and the initial fracture toughness,unstable toughness and fracture energy of specimens show a decreasing trend.
Keywords：cementitious compositefracture performancefreeze-thaw cyclemassthree-point bending testinitial fracture toughnessunstable toughnessfracture energy
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 352-356 )