摘要
为了研究玄武岩纤维在硅酸盐水泥中的侵蚀作用及机理,利用纤维在水泥基中浸泡不同时间,例如0h、2h、4h、6h、8h、10h、24h、32h后,得到不同侵蚀后的玄武岩纤维试样。利用纤维强度拉伸仪、扫描电镜(SEM)、红外光谱(FT-IR)以及X射线衍射仪(XRD)等研究处理后的纤维强力、形貌、基团以及结晶结构的变化。结果表明,纤维强力随侵蚀时间呈现先降低后上升的变化趋势,并在32h之后趋于稳定;纤维SEM形貌图表明纤维表面粗糙度随时间的增加而增加,在10h开始出现剥落现象,并在红FT-IR图的指纹区875cm-1处出现新的吸收峰,表明形成新的Si-OH键; XRD表征结果表明纤维在处理前后均呈现短程有序而长程无序的非晶态结构。
In order to stu'dy the eroding action and mechanism of basalt fiber in Portland cement,different eroded basalt fiber samples are obtained after the fiber soaked in cement base for different time,such as 0h,2h,4h,6h, 8h,10h,24h,32h.The fiber strength,morphology,groups,and crystal structure changes after treatment are investigated using fiber tensile tester,scanning electron microscope (SEM),infrared spectroscopy (FT-IR)and X-ray diffraction (XRD).The results show that the fiber strength first decreases and then rises with the erosion time, and tends to be stable after 32h.The SEM image of the fiber shows that the fiber surface roughness increases with time and begins to peel off at 10h.A new absorption peak appears at the fingerprint region 875cm^-1 of the red FT- IR map,indicating the formation of a new Si-OH bond;XRD characterization results show that the fiber exhibits a short-range order and a long-range disordered amorphous structure both before and after treatment.
作者
贾明皓
肖学良
冯古雨
钱坤
Jia Minghao;Xiao Xueliang;Feng Guyu;Qian Kun(Key Laboratory of Eco-Textile (Jiangnan University),Ministry of Education,Wuxi 214122,China)
出处
《建筑科学》
CSCD
北大核心
2019年第1期64-67,134,共5页
Building Science
基金
江苏省自然科学基金资助项目(BK20160157)
"十三五"国家重点研发计划项目:"土工建筑增强材料制备与应用"课题(2016YFB0303200)
江苏高校优势学科建设工程资助项目
2018年基本科研-省研究生实践创新计划项目(SJCX18_0626)~~
关键词
玄武岩纤维
水泥基浸泡
耐碱性
力学性能
微观结构
basalt fiber
cement-based soaking
alkali resistance
mechanical property
microstructure
