河南城建学院学报2025，Vol.34Issue(5)：20-27,8.DOI:10.14140/j.cnki.hncjxb.2025.05.004
高温下碳-玄武岩混杂纤维混凝土力学性能研究
Mechanical properties of carbon-basalt hybrid fiber concrete after high-temperature exposure
摘要
Abstract
To investigate the mechanical properties and damage evolution of carbon-basalt hybrid fiber concrete after exposure to high temperatures,an orthogonal test was conducted to determine the optimal dosage of carbon fiber and basalt fiber.Concrete specimens with the optimal mix ratio were then subjected to high-temperature treatment,followed by monitoring of their damage during uniaxial compression tests using acoustic emission technology.The results show that the compressive strength of the concrete reaches its peak at 200 ℃.Under all temperature conditions,the stress values of hybrid fiber concrete are significantly higher than those of ordinary concrete.The damage evolution of the concrete is closely related to temperature,and oxidation of the fibers as well as weakening of interface bonding at high temperatures accelerate damage.The optimal mix ratio is 0.3％carbon fiber,0.4％basalt fiber,and 10.0％fly ash,which markedly enhances the high-temperature mechani-cal properties and damage resistance of the concrete.Compared with ordinary concrete,its compressive strength increases by 7.61％,flexural strength by 58.86％,and splitting tensile strength by 77.56％.Acoustic emission characteristics effectively reflects the damage evolution process,providing a basis for safety monitoring and ma-terial design of concrete structures in high-temperature environments.关键词
正交试验/碳纤维/玄武岩纤维/损伤演化/声发射/高温性能Key words
orthogonal experiment/carbon fiber/basalt fiber/damage evolution/acoustic emission/high-tem-perature performance分类
土木建筑引用本文复制引用
卢小雨,陈天伦..高温下碳-玄武岩混杂纤维混凝土力学性能研究[J].河南城建学院学报,2025,34(5):20-27,8.基金项目
国家自然科学基金项目(52074006) （52074006）
