Study on activation of calcium-added coal gangue with composite mineralizers

被引：0

作者：

机构：

[1] College of Civil Engineering, Suzhou University of Science and Technology

[2] School of Materials Science and Engineering, Wuhan University of Technology

来源：

Song, X.-Y. (songxuyan2002@163.com) | 1600年 / Tongji University卷 / 16期

关键词：

Calcination system; Cementitious property; Coal gangue; Composite mineralizers; Structure characteristics;

D O I：

10.3969/j.issn.1007-9629.2013.04.027

中图分类号：

学科分类号：

摘要：

Coal gangue from Yixing, Jiangsu was investigated. After calcium was introduced into coal gangue, activated samples were prepared under different high temperatures by adding composite mineralizers. X-ray diffraction(XRD) method and infrared absorption spectrometry(IR) method were used to analyze their structure characteristics. Cementitious properties of activated samples were also detected. The research results were listed as follows: Under all activation conditions from 1000°C to 1100°C, CA is produced in activated samples due to the effect of composite mineralizers. CS, Ca3Al10O18 may exist in low activation conditions, such as under 1000°C and holding 0.5 h or 1.0 h. And when it comes to 1050°C with holding 0.5 h, Ca3Al10O18 disappears. CS disappears at 1050°C with holding 1.0 h and at the same time [Ca4(Al2O4)]3- generates. Different activated samples have different cementitious properties. Activated samples calcined at 1050°C, 0.5 h show the greatest influence on cement strength, and its compressive strength of 28d can reach 70.16 MPa, with substituting 30% mass of cement.

引用

页码：706 / 710

页数：4

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