Mechanical Properties of Basalt Fiber Unidirectional Sheet in Salt Freezing Environment
ZHOU Qi
MEI Kuihua
WANG Fengxuan
XU Shengyu
SUN Shengjiang
Abstract：Through rapid freeze-thaw tests and tensile tests,the effects of four types freeze-thaw media(salt solutions)on the mechanical properties of basalt fiber(BF)unidirectional sheet under freeze-thaw conditions were investigated.A tensile strength degradation model for BF unidirectional sheet in salt-freezing environments was subsequently proposed.The results demonstrate that the sizing film is detached and basalt fibers are degraded by freeze-thaw cycles.The most severe erosion effect on basalt fiber filaments was observed when the specimens were exposed to the most unfavorable chloride-sulfate composite solution(SC,the mass fraction of NaCl and Na₂SO₄are 3.5%and 3.0%respectively).The tensile failure modes of specimens can be divided into four categories:middle centralized failure,middle decentralized failure,end centralized failure,and end decentralized failure.The highest reductions in tensile strength and ultimate elongation were found in specimens subjected to the SC freeze-thaw medium,whereas the elastic modulus is not significantly affected by freeze-thaw cycles.The proposed tensile strength damage model under salt-freezing environments shows good aggrement with the experimental results.
Keywords：basalt fiber unidirectional sheetfreeze-thaw cycledurabilitymechanical propertydamage mechanism
Publication Date：2025-09-30
Online Publishing Date：2025-10-17(First online date of this platform, not the publication date of the document)
Pages：11( 858-868 )