硅酸盐通报2024，Vol.43Issue(1)：102-112,11.
SiO2/KH560改性玄武岩纤维混凝土力学性能研究
Mechanical Properties of SiO2/KH560 Modified Basalt Fiber Reinforced Concrete
摘要
Abstract
To study the effect of silane coupling agent(KH560)and nano-SiO2 synergistically KH560 modified basalt fiber(BF)on the mechanical properties of concrete,KH560 was used to surface modify for BF to produce KH560-BF,and nano-SiO2 and KH560 were used to modify BF to produce SiO2-KH560-BF.Orthogonal tests were used to screene high-strength modified fibers,and the effects of mass fractions of nano-SiO2 dispersion,lubricant and KH560 on the filament bundle strength of SiO2-KH560-BF were investigated.The mechanical properties of modified concrete at 7 and 28 d were evaluated and the microstructure of the concrete was characterized by SEM and EDS.The results show that the optimal upper agent composition for SiO2-KH560-BF is nano-SiO2 dispersion 1.6％,lubricant 0.4％,and KH560 0.5％,and the degree of influence of the three factors is nano-SiO2 dispersion＞KH560＞lubricant.Compared with KH560-BF,the fiber tow strength of SiO2-KH560-BF increases by 8.62％,tensile strength increases by 4.41％,Si content increases by 24.9％,and there were fewer agglomerated buildups in the SEM images of SiO2-KH560-BF than those of KH560-BF.The 7 and 28 d compressive,split tensile,and axial compressive strength enhancement effects of the concrete with a moderate amount of SiO2-KH560-BF are higher than those of the concrete with KH560-BF.关键词
纳米二氧化硅/玄武岩纤维/纤维混凝土/硅烷偶联剂/正交试验/力学性能Key words
nano-silica/basalt fiber/fiber reinforced concrete/silane coupling agent/orthogonal test/mechanical property分类
建筑与水利引用本文复制引用
杨鑫,于奎,吉冯春,聂堂哲,李科,白天..SiO2/KH560改性玄武岩纤维混凝土力学性能研究[J].硅酸盐通报,2024,43(1):102-112,11.基金项目
河南省高校人文社会科学研究一般项目(2021-ZDJH-0257) （2021-ZDJH-0257）
大学生实践教学创新项目(SPCP2023355,SPCP2023323) （SPCP2023355,SPCP2023323）
