高铝煤矸石复合活化及其火山灰效应分析

发布时间：2017-12-28 06:38

  本文关键词：高铝煤矸石复合活化及其火山灰效应分析　出处：《建筑材料学报》2016年02期 　论文类型：期刊论文

  更多相关文章： 高铝煤矸石 复合活化 强度活性指数 火山灰效应

【摘要】：采用胶砂强度法研究了机械粉磨、煅烧、增钙煅烧及与化学活化剂复合对内蒙古某地高铝煤矸石活性的激发效果,并采用SEM,XRD,FTIR分析了不同粉磨时间、不同煅烧温度对高铝煤矸石内部结构变化及其活化效果的影响;以强度活性指数、火山灰效应贡献率为考察指标,分析了不同方式活化的高铝煤矸石的火山灰效应.结果表明:单纯机械粉磨对高铝煤矸石的活性有一定的激发作用,但活化效果有限;煅烧对高铝煤矸石活性有明显的激发作用,其最佳煅烧温度为800℃,此时高铝煤矸石水泥胶砂强度活性指数达126.5%,火山灰效应贡献率达44.7%;增钙煅烧可使其强度活性指数进一步提高到142.6%,火山灰效应贡献率提高到50.9%;在增钙煅烧基础上掺入0.6%(质量分数)的硫酸钠可使其28d抗压强度达到78.9MPa,强度活性指数达到157.0%,火山灰效应贡献率达到55.5%.
[Abstract]:Study on the mechanical grinding, calcination, calcination with calcium and activation effect and chemical activator compound in Inner Mongolia province high aluminum coal gangue activity by mortar strength method, and using SEM, XRD, FTIR analysis of different grinding time and different calcination temperature on the internal structure of high aluminum coal gangue changes and the effect of activation on; the strength activity index, volcano ash effect contribution rate as the study index, analyzes the effect of different ways of activated volcano ash high aluminum coal gangue. The results showed that has some stimulating effect on the activity of simple mechanical grinding of high aluminum coal gangue, but the activation effect is limited; calcination were induced obviously on the high aluminum coal gangue activity the best, the calcination temperature is 800 DEG C, the high aluminum coal gangue cement mortar strength activity index was 126.5%, the contribution rate of 44.7% volcano ash effect; calcination with calcium to further improve the strength activity index To 142.6%, the contribution rate of pozzolanic effect increased to 50.9%. On the basis of calcium calcination, 0.6% (mass fraction) of sodium sulfate could be added to 28d, the compressive strength of 78.9MPa reached 157%, and the contribution rate of pozzolanic effect reached 55.5%..
【作者单位】： 北方工业大学土木工程学院;固废资源化利用与节能建材国家重点实验室;武汉理工大学材料科学与工程学院;中冶建筑研究总院有限公司;
【基金】：北京市自然科学基金资助项目(2142013) 北京市教委科技发展计划资助项目(KM201210009010) 固废资源化利用与节能建材国家重点实验室开放基金资助项目(SWR-2012-003)
【分类号】：TD849.5
【正文快照】： 4.中冶建筑研究总院有限公司,北京100088)煤矸石是中国年排放量和累计堆存量最大的工业废弃物之一[1].截至2012年底,中国煤矸石堆存量约为50亿t,其中,高铝煤矸石(high alumina coalgangue,HACG)的堆存量至少在5亿t以上,年排放量达1.2亿t[2].然而,2011年煤矸石的利用率仅62%[3]，

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