摘要
利用蒸汽动能磨和球磨2种工艺制备超细粉煤灰,研究超细粉煤灰物理特性差异对水泥浆体力学性能的影响,并利用背散射扫描电子显微镜,分析粉煤灰在水泥浆体中的水化进程。结果表明:蒸汽动能磨制备的超细粉煤灰粒度分布范围窄,颗粒分布均匀,球形颗粒多,分散性好,有利于减少需水量,提高强度活性指数;且在水泥浆体中,水化速率快有利于提高复合胶凝材料净浆抗压强度。
In this paper,the influences of the physical properties of ultrafine fly ash,prepared by two processes of steam jet milling and ball milling,on the mechanical properties of cement paste were studied.The hydration process of fly ash in cement paste was analyzed by backscattered scanning electrons.The results show that the ultrafine fly ash prepared by steam jet mill has the characteristics of narrow and uniform particle size distribution,more spherical particles and better dispersibility,which are beneficial to reduce water demand and improve strength activity index,and lead to the faster hydration speed of fly ash in the cement slurry,helping to enhance the compressive strength of composite cementitious materials of the paste.
作者
曾玻
邹红生
杨飞
唐凯靖
王建波
李星
林龙沅
ZENG Bo;ZOU Hongsheng;YANG Fei;TANG Kaijing;WANG Jianbo;LI Xing;LIN Longyuan(School of Environment and Resource,Key Laboratory of Solid Waste Treatment and Resource Recycle,Ministry of Education,Sichuan Engineering Lab of Non-metallic Mineral Powder Modification and High-value Utilization,Southwest University of Science and Technology,Mianyang 621010,China;Department of Materials Engineering,Mianyang Vocational and Technical College,Mianyang 621000,China)
出处
《中国粉体技术》
CAS
CSCD
2021年第3期7-15,共9页
China Powder Science and Technology
基金
四川省科技计划资助项目,编号:2018JY0438
四川省教育厅重点项目,编号:18ZA0498
西南科技大学博士基金项目,编号:18zx7116。
关键词
超细粉煤灰
蒸汽动能磨
球磨
粒度分布
形貌
ultrafine fly ash
steam jet mill
ball mill
particle size
topography
