| 摘要: |
| 考察了不同固化温度下9种偏高岭土基地聚物的力学性能，并通过微量热、红外光谱(FTIR)、扫描电镜（SEM）等测试技术分析了固化温度影响偏高岭土基地聚物性能的作用机理.结果表明：升高固化温度可以促进硅铝酸盐的溶解和缩聚，从而提高偏高岭土基地聚物的力学性能；但过高的固化温度会使缩聚反应速度过快，从而使硅铝酸盐溶解所产生的缩聚反应前驱物被生成的胶凝体所包裹，无法接触碱激发剂发生缩聚反应，造成地质聚合反应不充分和地聚物力学性能降低. |
| 关键词: 地聚物 偏高岭土 固化温度 地质聚合反应 机理 |
| DOI：10.3969/j.issn.1007 9629.2017.03.010 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目（51578078）；长沙市科技计划项目（K1508020 31）；长沙理工大学土木工程优势特色重点学科创新性项目（16ZDXK10） |
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| Influencing Mechanism of Curing Temperature on Synthesis of Metakaolin Based Geopolymer |
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PENG Hui1, CHEN Zhikun1, CUI Chao1, ZHAO Jianwei1, CAI Chunsheng2
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1.School of Civil Engineering and Architecture, Changsha University of Science & Technology, Changsha 410114, China;2.Department of Civil and Environmental Engineering, Louisiana State University, Baton Rouge 70803, USA
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| Abstract: |
| The mechanical properties of geopolymer samples synthesized by nine kinds of metakaolin under different cuing temperatures were investigated, and microcalorimetry, infrared spectrum（FTIR） and SEM EDS were employed to study the mechanism of influence of curing temperature on the geopolymer performance. Test results show that increasing curing temperature can promote dissolution and polycondensation of aluminosilicate and thus enhance the mechanical properties of the obtained geopolymer. However, too high curing temperature leads to too fast polymerization， thus the dissolution products will be enclosed by gel generated by polymerization before they can involve in the subsequent reactivity. That results in an uncompleted polymerization reaction and a decrease of compressive strength of geopolymer. |
| Key words: geopolymer metakaolin curing temperature geopolymerization mechanism |
