LI Yansun ¹ JIN Wenhui ² WANG Qun ¹ CHENG Yue ¹ HU Xuliang ¹

(1. Key Laboratory of Advanced Ceramics of Jiangxi Province, School of Materials Science and Engineering, Jingdezhen,

Ceramic Institute, Jingdezhen Jiangxi 333403, China; 2.Jingdezhen Huayi Compressor Co. Ltd., Jingdezhen Jiangxi 333000, China)

Abstract: After the study of their properties, copper mine tailings, kaolin and fly ash were calcined and then used as the main ingredients to prepare geopolymeric cement with the admixture of NaOH, Na₂SiF₆ , (NaPO₄)₃ , Na₂SiO₃ and water. It is indicated that geopolymeric cement obtained from a batch of 28.28% of fly ash, 28.28% of copper mine tailings,14.13% of kaolin, 6.36% of sodium hydroxide, 3.5% of coagulation sludge, 1.06% of sodium tripolyphosphate and 18.4% sodium silicate has good acid and fire resistance and its 7d compressive strength is 28.46MPa, The reaction mechanism of geopolymeric cement was analysed by XRD, SEM and DTA.

Key words: fly ash; copper mine tailings; kaolin, coagulation sludge; geopolymeric cement