| 摘要: |
| 以江苏宜兴煤矸石为主要研究对象，掺入钙质材料后，在自配复合矿化剂作用下高温煅烧成活化煤矸石，采用X射线衍射（XRD）和红外吸收光谱（IR）对其结构特征进行了分析，并对其胶凝性能进行了试验.结果表明：在复合矿化剂作用下，于1000~1100℃下煅烧而成的活化煤矸石中有CA生成，在低活化条件（1000℃，保温0.5，1.0h）下，有CS，Ca3Al10O18生成，活化温度升高至1050℃并保温0.5h时，Ca3Al10O18消失，在此温度下延长保温时间至1.0h时，CS消失，［Ca4(Al2O4)］3-生成.各活化煤矸石的胶凝性能不同，其中以1050℃下保温0.5h煅烧而成的活化煤矸石对水泥净浆抗压强度影响最大，将其以30%（质量分数）替代水泥后，体系28d的净浆抗压强度可达70.16MPa. |
| 关键词: 煤矸石 复合矿化剂 活化制度 结构特征 胶凝性能 |
| DOI：10.3969/j.issn.1007 9629.2013.04.027 |
| 分类号: |
| 基金项目:江苏省高校自然科学基金资助项目（11KJD560002）；苏州市建设科研项目（Z1574）；苏州科技学院青年骨干教师培养对象基金资助项目 |
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| Study on Activation of Calcium Added Coal Gangue withComposite Mineralizers |
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SONG Xu yan1, HAN Jing yun1, ZHANG Wei2, GAO Zhi hai1
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1.College of Civil Engineering, Suzhou University of Science and Technology, Suzhou 215011, China;2.School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
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| Abstract: |
| 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℃ to 1100℃, 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℃ and holding 0.5h or 1.0h. And when it comes to 1050℃ with holding 0.5h, Ca3Al10O18 disappears. CS disappears at 1050℃ with holding 1.0h and at the same time ［Ca4(Al2O4)］3- generates. Different activated samples have different cementitious properties. Activated samples calcined at 1050℃, 0.5h show the greatest influence on cement strength, and its compressive strength of 28d can reach 70.16MPa, with substituting 30% mass of cement. |
| Key words: coal gangue composite mineralizers calcination system structure characteristics cementitious property |
