玄武岩纤维表面改性对混凝土力学性能的影响  

Effect of Basalt Fiber Surface Modification on Mechanical Properties of Concrete

作　　者：杜常博 朱明皓 易富[1,2] 陶晗 孙迪 DU Changbo;ZHU Minghao;YI Fu;TAO Han;SUN Di(Department of Civil Engineering,Liaoning Engineering University,Fuxin 123000,China;Beijing Jingneng Geology Co.,Ltd.,Beijing 102300,China;Liaoning Transportation Planning and Design Institute,Shenyang 110166,China)

机构地区：[1]辽宁工程技术大学土木工程学院,辽宁阜新123000 [2]北京京能地质有限公司,北京102300 [3]辽宁省交通规划设计院,辽宁沈阳110166

出　　处：《建筑材料学报》2024年第7期573-579,共7页Journal of Building Materials

基　　金：辽宁省教育厅青年基金资助项目(LJKQZ2021153);辽宁工程技术大学首批“双一流”学科建设创新团队项目(LNTU20TD-12)。

摘　　要：用偶联剂KH550与纳米SiO_(2)协同改性玄武岩纤维(BF),研究了BF表面改性对玄武岩纤维混凝土(BFRC)力学性能的影响.结果表明:经KH550与纳米SiO_(2)改性后,BF表面出现了C—H键,且Si—O—Si键对应的振动峰变强;当纳米SiO_(2)用量为BF质量的3%时,BF形貌变化最为明显,此时改性BFRC的力学强度及抗裂性能均高于普通BFRC;在KH550的桥联作用下,纳米SiO_(2)可有效增强纤维与混凝土基体的黏结强度,进而提高BFRC的力学强度和抗裂性能.Basalt fiber(BF)was modified by coupling agent(KH550)and nano‑SiO_(2),and the effect of BF surface modification on the mechanical properties of basalt fiber reinforced concrete(BFRC)was studied.The results show that after modification with KH550 and nano‑SiO_(2),the surface of BF forms C—H bonds,and the vibration peak corresponding to Si—O—Si bonds becomes stronger.When the amount of nano‑SiO_(2) is 3%of the mass of BF,the morphology of BF changes most significantly,and the mechanical strength and crack resistance of modified BFRC are significantly higher than those of ordinary BFRC.Under the bridging effect of KH550,nano‑SiO_(2) can effectively enhance the bonding strength between fibers and the concrete matrix,thereby improving the mechanical strength and crack resistance of BFRC.

关 键 词：玄武岩纤维 抗裂 纳米SiO_(2) 混凝土 改性 力学性能 

分 类 号：TU526[建筑科学—建筑技术科学]