摘要
采用不同碱浓度和模数的水玻璃制备碱矿渣胶凝材料,通过X射线衍射仪(XRD)和热重-差示扫描量热分析仪(TG-DSC)分析该胶凝材料的水化产物,通过扫描电子显微镜(SEM)及能谱仪(EDS)对水化产物的形貌及化学组成进行观测分析。结果表明:碱矿渣胶凝材料主要水化产物为低nCa/nSi比的C-S-H凝胶与C-A-S-H凝胶。相较于硅酸盐水泥,碱矿渣胶凝材料微观结构更为密实,但存在细小的微裂纹;碱矿渣胶凝材料C-S-H凝胶的nCa/nSi比和nCa/nSi^+Al比相对较低,分别在0.39~1.57和0.32~1.16范围内。
In this paper, alkali activated slag was prepared by using waterglass with different alkali concentration and moduli. Hydration products of such cementitious material were detected by using X-ray diffractometry (XRD) and thermogravimetry-differential scanning calorimetry (TG-DSC). Morphology and chemical elements of the hydration products were observed and analyzed by using scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS), respectively. The results show that the main hydration products of alkali activated slag were C-S-H gels with low nCa/nSi and C-A-S-H gels. Compared to Portland cement, alkali activated slag had a denser microstructure, but with fine microcracks;the C-S-H gels formed had lower nCa/nSi and nCa/n(Si+Al), which were in the ranges of 0.39-1.57 and 0.32-1.16, respectively.
作者
黄丽萍
马倩敏
郭荣鑫
颜峰
林志伟
张敏
史天尧
Huang Liping;Ma Qianmin;Guo Rongxin;Yan Feng;Lin Zhiwei;Zhang Min;Shi Tianyao(Key Laboratory of Yunnan province for Disaster Reduction in Civil Engineering, Faculty of Civil Engineering and Mechanics,Kunming University of Science and Technology, Kunming ,Yunnan 650500)
出处
《非金属矿》
CAS
CSCD
北大核心
2019年第4期34-37,共4页
Non-Metallic Mines
基金
国家自然科学基金(51502121,11562010)
昆明理工大学引进人才基金资助项目(KKSY201406112)
关键词
碱矿渣胶凝材料
水化产物
微观形貌
产物特性
alkali activated slag
hydration product
microstructure
product characteristics
