摘要
为探究聚丙烯纤维与玻璃纤维对胶结充填体初始微观结构及流动性能的影响,采用坍落度及扩展度表征料浆流动性,并用SEM和核磁共振设备对掺与未掺纤维充填体初始微观结构进行分析。结果表明:纤维的掺入会对充填料浆的流动性产生负面影响,具体呈现玻璃纤维(BL)>混合纤维(HB)>聚丙烯纤维(JBX);此外,料浆的坍落度及扩展度随水泥含量的增加基本遵循一次函数递减关系;纤维能有效阻碍孔隙裂隙的生成,但纤维的类型并不会显著影响充填体的微观结构;同时水泥含量越高,基体内部结构更加密实;核磁结果显示,充填体的T_(2)图谱均呈现3个波峰,与无纤维充填体相比,掺纤维充填体的的信号强度较低,波峰总面积较小,并且第一波峰面积占比增大,第二及第三波峰面积减小。研究结论可为矿山应用纤维增强技术提供理论参考依据。
In order to investigate the effect of polypropylene fibres and glass fibres on the initial microstructure and flow properties of the cemented filler,the slump and extension were used to characterise the slurry flowability,and the initial microstructure of the doped and un-doped fibre filler was analysed using SEM and nuclear magnetic resonance(NMR) equipment.The results show that fibre incorporation negatively affects the flowability of the filling slurry,specifically presenting glass fibre(BL)> hybrid fibre(HB)> polypropylene fibre(JBX).In addition,the slump and extensibility of the slurry basically follow a decreasing primary function with increasing cement content.Fibres are effective in hindering the generation of pore cleavage,but the type of fibre does not significantly affect the microstructure of the filler.Also the higher the cement content,the denser the internal structure of the matrix.The NMR results showed that the maps of the filled bodies showed three peaks,and the fibre-doped filled bodies had lower signal intensity and smaller total area of the peaks compared with the fibre-free filled bodies,and the area of the first peak increased,while the area of the second and third peaks decreased.The conclusions of the study can provide a theoretical reference basis for the application of fibre reinforcement technology in mines.
作者
宋学林
张春雷
付玉华
赖泽金
管华栋
SONG Xuelin;ZHANG Chunlei;FU Yuhua;LAI Zejin;GUAN Huadong(School of Resources and Environmental Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China;Jiangxi Key Laboratory of Mining Engineering,Ganzhou 341000,China;Gannan University of Science and Technology,Ganzhou 341000,China;School of Civil and Surveying&Mapping Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China)
出处
《有色金属工程》
CAS
北大核心
2024年第9期138-149,共12页
Nonferrous Metals Engineering
基金
国家自然科学基金资助项目(51464015)
江西省教育厅科学技术研究资助项目(GJJ190499)
江西理工大学校级研究生创新专项资金项目(XY2022-S017)。
关键词
纤维
胶结充填体
流动性能
微观结构
fibres
cemented filler
flow properties
microstructure
作者简介
宋学林(1997-),男,硕士研究生,主要从事矿山充填研究;通信作者:张春雷(1977-),男,硕士,副教授,主要从事岩石学及稀土浸矿研究。
