Abstract： The calcination and activation of kaolin was researched by TGDSC, XRD, IR, SEM and Raman spectra tests. The temperature range of calcination and activation of kaolin were obtained. The change of functional groups in the kaolin before and after calcination was analyzed. The compressive strength and micrograph of the geopolymer which was prepared by calcined kaolin were compared. The results show that best calcination and activation condition of kaolin is calcination at 600 ℃ for 6 h. The hydrated paste structure of geopolymer prepared with the calcined kaolin is dense. The hydration products stack laminally. The 7 d compressive strength of hydrated geopolymer paste is 62.7 MPa.

Keywords: kaolin; calcination and activation; activation temperature; calcining time; geopolymer

中图分类号：U414.750          文献标志码：A

文章编号：1008-5548（2015）01-0052-06

DOI:10.13732/j.issn.1008-5548.2015.01.011

收稿日期：2014-03-04， 修回日期：2014-03-19，在线出版时间：2015-03-02。

基金项目：广西科学研究与技术开发计划项目，编号： 桂科攻12118023-5；广西高等学校重点资助科研项目，编号：201202ZD049；国家级大学生创新创业训练计划项目，编号：201310596014。

第一作者简介：简家成（1989—），男，硕士研究生，研究方向为功能材料的制备。 E-mail：963264480@qq.com。

通信作者简介：刘峥（1962—），女，博士，教授，研究方向为应用有机合成及功能材料制备。 E-mail：lisa4.6@163.com。