ZENG Bo1, ZOU Hongsheng1, YANG Fei1, TANG Kaijing2, WANG Jianbo1, LI Xing1, LIN Longyuan1
(1. 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;2. Department of Materials Engineering, Mianyang Vocational and Technical College, Mianyang 621000, China)
Abstract: 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.
Keywords: ultrafine fly ash; steam jet mill; ball mill; particle size; topography
中图分类号：TK09
文献标志码：A
文章编号：1008-5548(2021)03-0007-09
DOI:10.13732/j.issn.1008-5548.2021.03.002
收稿日期： 2020-10-08，修回日期：2021-03-07，在线出版时间：2021-04-07 14:24。
基金项目：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。
第一作者简介：曾玻(1996—)，女，硕士研究生，研究方向为固体废物处理。E-mail: zengbo24@163.com。
通信作者简介：王建波(1987—)，男，博士，副教授，硕士生导师，研究方向为固体废物处理。E-mail: wangjianbo@swust.edu.cn。
