摘要
为了探究α型和γ型纳米Al_2O_3对水泥基材料的改性作用,采用细度为30 nm的α型和γ型纳米Al_2O_3、尧柏水泥、标准砂和聚羧酸减水剂制备水泥基材料,探析α型和γ型纳米Al_2O_3对水泥基材料的凝结时间、力学性能和收缩性能的影响,并分析其作用机理。结果表明:α型和γ型纳米Al_2O_3均会降低水泥基材料的凝结时间,提高水泥基材料的抗折强度和抗压强度,降低水泥基材料的干燥收缩,但γ型纳米Al_2O_3对水泥基材料的改性作用低于α型纳米Al_2O_3。综合本文和文献分析发现,纳米Al_2O_3在水泥基材料中发挥着尺寸效应、填充效应和表面效应,从而达到改性水泥基材料的力学性能和耐久性。
In order to understand the modification effects ofαandγtype nano-Al2O3 on the cement base material,the 30 nmαandγtype nano-Al2O3,Yaobai cement,standard sand and carboxylic acid water reducing agent were used to make cement base materials,the setting time,mechanical properties and shrinkage performance and their mechanism were analyzed.The results showed that:The setting time of cement base material can be reduced,the flexural strength and compressive strength of cement base material can be improved,and the drying shrinkage of cement-based materials can be reduced when nanoAl2O3 ofαandγtype replace cement.But the modification effect ofαtype nano-Al2O3 on cement base material is lower than theγtype.Based on the analysis of this article and literature review,we found that nano-Al2O3 ofαandγtype in cement base material plays the roles of size effect,filling effect and surface effect,which will achieve the ideas that modified mechanical properties and durability of cement base material.
作者
吴福飞
董双快
赵本容
刘春梅
王凯
WU Fufei;DONG Shuangkuai;ZHAO Benrong;LIU Chunmei;WANG Kai(School of Materials and Architectural Engineering,Guizhou Normal University,Guiyang 550025,China)
出处
《水资源与水工程学报》
CSCD
2019年第2期172-177,共6页
Journal of Water Resources and Water Engineering
基金
贵州省教育厅青年科技人才成长项目(黔教合KY字[2018]125)
贵州科技厅-贵州师范大学联合基金项目(黔科合LH字[2017])7351号
贵州师范大学2016年博士科研启动项目(0517073)