Ti含量对矿渣玻璃体结构及其水化活性的影响机制研究
Influence Mechanism of Ti Content on Structure and Hydration Activity of Slag-Based Glass
李宁 1赵立革 2赵少伟 1王卉 1郑永超1
作者信息
- 1. 北京建筑材料科学研究总院有限公司,北京 100041
- 2. 金隅住宅产业化(唐山)有限公司,唐山 064108
- 折叠
摘要
本文选取几种Ti含量不同的矿渣,利用XRD、DSC、FT-IR、XPS等测试手段分析矿渣重熔处理前后无定型网络中Al—O、Ti—O和Si—O结构的变化情况.结果表明,随着钛含量增加,原矿渣中的Al3+和Ti4+倾向以稳定性较差的高配位形式存在,这会减弱其玻璃体结构对热变化的抵抗能力,表现为玻璃转变温度Tg和结晶温度Tx降低.经重熔急冷后,随着钛含量的增加,高钛矿渣中的Ti4+和Al3+会倾向以低配位的形式存在,这些网络形成体的增多会导致玻璃体结构稳定性增强,表现为矿渣后期活性明显减弱.这说明矿渣的性能除了受碱度以及玻璃体含量影响之外,还与无定型网络的结构变化紧密相关.
Abstract
This study selected several types of slag with different titanium content,and subjected them to re-melting and water quenching treatment.Various analytical techniques,such as XRD,DSC,FT-IR and XPS were used to analyze the changes in the amorphous network structures of Al—O,Ti—O and Si—O in slag before and after remelting treatment.The research results show that as the titanium content increases,Al3+and Ti4+in the raw slag tend to exist in a highly coordinated form with poor stability,which weakens the resistance of its vitreous structure to thermal changes,manifested by a decrease of glass transition temperature Tg and crystallization temperature Tx.After remelting and rapid cooling,Ti4+and Al3+ in high-titanium slag tend to exist in a low coordination form with the increase of titanium content.The increase of these network forming bodies leads to an increase in the stability of the vitreous structure,which is manifested by a significant decrease in the activity of the slag in the later stage.This indicates that the performance of slag is not only affected by alkalinity and glass content,but also closely related to the structural changes of the amorphous network.
关键词
高钛矿渣/玻璃体结构/稳定性/聚合度/水化活性/矿渣碱度Key words
high-titanium slag/vitreous structure/stability/aggregation degree/hydration activity/slag alkalinity引用本文复制引用
基金项目
国家重点研发计划(2021YFC1910605)
出版年
2024
国家科技期刊平台
NSTL
万方数据