Experimental study on copper slag activity excitation and hydration mechanism analysis

被引：0
|
作者：
Wu A. [1 ,2 ]
Jiang G. [1 ,2 ]
Lan W. [1 ,2 ]
Liu J. [1 ,2 ]
Xue Y. [1 ,2 ]
机构：
[1] Key Laboratory of High-Efficient Mining and Safety of Metal Mines, Ministry of Education, University of Science and Technology Beijing, Beijing
[2] School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing
来源：
Wu, Aixiang (wuaixiang@126.com) | 1600年 / Central South University of Technology卷 / 48期
基金：
中国国家自然科学基金;
关键词：
Alkali activation; Copper slag; Filling gelling agent; Hydration mechanism; Mechanical activation;
D O I：
10.11817/j.issn.1672-7207.2017.09.031
中图分类号：
学科分类号：
摘要：
In order to realize the recycling of copper slag, copper slag cementitious material was prepared by the way of mechanical activation and alkali activation, and the hydration mechanism of copper slag was analyzed by XRD, SEM, EDS and slag vitreous phase structure model. The results show that when the specific surface area of slag is 520 m2/kg, 7 d strength and 28 d strength of copper slag paste specimen reach 2.4 MPa and 3.3 MPa, respectively. When cement sand ratio is 1:1, 7 d and 28 d strength of copper slag tailings filling reach 0.7 MPa and 1.0 MPa, respectively, meeting the requirements of local mine filling. In the early stage of hydration, the calcium-rich phase and high calcium lime generates calcium hydroxide, which further forms C-S-H gel and other hydration products with silicon-rich phase. As the hydration reaction continues, the internal pores of sample are filled with hydration products and gradually shrink into hole type, and the structure becomes denser. © 2017, Central South University Press. All right reserved.
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页码：2498 / 2505
页数：7
相关论文
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