片状纳米勃姆石对水泥力学及微观性能的影响

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (11): 3556-3564.

片状纳米勃姆石对水泥力学及微观性能的影响

朱建平, 朱丽飞, 冯春花, 阙永博, 宋薇茵, 张文艳, 杨阔

河南理工大学材料科学与工程学院,焦作 454003

收稿日期:2021-05-19 修回日期:2021-07-16 出版日期:2021-11-15 发布日期:2021-12-08
通讯作者: 冯春花,博士,副教授。E-mail:fengchunhua@hpu.edu.cn
作者简介:朱建平(1978—),男,博士,教授。主要从事固废综合利用及绿色建筑材料方面的研究。E-mail:jianpingzhu@hpu.edu.cn
基金资助:
国家自然科学基金青年基金(51908198);绿色高性能建筑材料河南省杰出外籍科学家工作室(GZS2021003)

Effect of Flaky Nano Boehmite on Mechanical and Microscopic Properties of Cement

ZHU Jianping, ZHU Lifei, FENG Chunhua, QUE Yongbo, SONG Weiyin, ZHANG Wenyan, YANG Kuo

School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China

Received:2021-05-19 Revised:2021-07-16 Online:2021-11-15 Published:2021-12-08

摘要/Abstract

摘要： 掺加纳米颗粒会影响到材料的力学性能,本文采用水热法在碱性环境下合成了片状纳米勃姆石,并将其加入到水泥中,研究了片状纳米勃姆石对水泥浆体力学性能的影响规律,并结合水化热、X射线衍射分析、热分析、氮吸附分析、扫描电子显微镜分析等测试手段对片状纳米勃姆石在水泥中的作用机理进行研究。结果表明:片状纳米勃姆石的加入可以明显提高水泥浆体的早期力学性能,与空白组相比,当勃姆石掺量为0.5%(质量分数)时,水泥浆体的抗压强度最大可以提高42.8%;勃姆石的加入不仅可以提高水泥水化反应速率,促进水泥的早期水化,还可以减少有害毛细孔含量,优化孔结构,提高水泥浆体的致密程度,从而促进水泥早期强度的发展。该研究结果为改善水泥的力学性能提供了新的方法。

关键词: 水泥浆体, 片状纳米勃姆石, 抗压强度, 水化产物, 水化热, 孔结构, 作用机理

Abstract: The addition of nanoparticles will affect the mechanical properties of materials. In this paper, flaky nano boehmite (FNB) was synthesized by the hydrothermal method in alkaline environment. The FNB was added to cement, and its influence on the mechanical properties of cement slurry was studied by hydration heat, X-ray diffraction, thermal analysis, nitrogen adsorption and scanning electron microscope. The results show that the addition of FNB obviously improves the early mechanical properties of cement paste, and when the content of FNB is 0.5% (mass fraction), the compressive strength of cement paste is increased by 42.8% to the maximum compared with the blank group. The addition of FNB can not only improve the hydration reaction rate of cement and promote the early hydration of cement, but also reduce the content of harmful pores, optimize the pore structure and improve the compactness of cement paste, thus promoting the development of early strength of cement. The research results provide a new method to improve the mechanical properties of cement paste.

Key words: cement paste, flake nano boehmite, compressive strength, hydrochemical product, hydration heat, pore structure, reinforcing mechanism

中图分类号:

TQ172

朱建平, 朱丽飞, 冯春花, 阙永博, 宋薇茵, 张文艳, 杨阔. 片状纳米勃姆石对水泥力学及微观性能的影响[J]. 硅酸盐通报, 2021, 40(11): 3556-3564.

ZHU Jianping, ZHU Lifei, FENG Chunhua, QUE Yongbo, SONG Weiyin, ZHANG Wenyan, YANG Kuo. Effect of Flaky Nano Boehmite on Mechanical and Microscopic Properties of Cement[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(11): 3556-3564.

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