化学活化煤矸石—水泥复合体系水化性能研究
Research on Hydration Properties of Blended Cement Based on Chemically Activated Coal Gangue
DOI: 10.12677/HJCE.2017.62014, PDF, HTML, XML, 下载: 1,619  浏览: 2,311 
作者: 苗春*：上海建科检验有限公司，上海；国家建筑工程材料质量监督检验中心，上海；上海市建筑科学研究院(集团)有限公司，上海
关键词: 煤矸石；化学活化；火山灰效应；水化进程；Coal Gangue； Chemical Activation； The Pozzolanic Effect； Hydration Process
摘要: 采用比强度法对化学活化煤矸石—水泥复合体系中活化煤矸石的火山灰效应进行评定；通过测定复合体系Ca(OH)2剩余量和化学结合水量结合X射线衍射分析(X-ray diffraction, XRD)来研究其水化进程。结果表明：化学激发剂的加入降低了体系的Ca(OH)2含量，提高了体系水化初期结合水量；水化初期掺入激发剂体系的Xrd图谱中Ca(OH)2、C2S和C3S等峰值稍低于基准试样，并且二者之间的差值随着龄期的延长而增大，说明激发剂的掺入加速了煤矸石和水泥水化产物Ca(OH)2之间的反应，提高了煤矸石火山灰效应。
Abstract: In this paper, coal gangue is treated by means of chemical activation and hardened cement pastes with activated coal gangue were made. By specific strength concept, the pozzolanic effect of activated coal gangue could be investigated. Through the content of Ca(OH)2 surplus and the amount of chemically combined water, the hydration degree of activated coal gangue-cement system could be investigated. By means of X-ray diffraction (XRD), the hydration process of the cement system with activated coal gangue could be analyzed. The results show that, adding in chemical accelerant, activated coal gangue-cement system shows more profound hydration degree, with lower content of Ca(OH)2 surplus and higher chemically combined water amount. The main hydration products are C-S-H gel, Ca(OH)2 and sulfoaluminate hydrate ettringite. Along with hydration process, the hydration degree deepens gradually. Compared with no chemical activator system, the distribution of hydration products was much larger in this system.
文章引用：苗春. 化学活化煤矸石—水泥复合体系水化性能研究[J]. 土木工程, 2017, 6(2): 128-133. https://doi.org/10.12677/HJCE.2017.62014

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