亚微米玻璃粉制备及其水化性能的研究

发布时间：2018-06-08 19:45

本文选题：废弃玻璃粉 + 亚微米　；参考：《四川建筑科学研究》2017年04期

【摘要】：把废弃玻璃粉粉磨至颗粒粒径达到亚微米,并等质量取代部分水泥制作玻璃粉净浆试件,通过测试不同龄期的强度,以及采用扫描电子显微镜(SEM)和X射线衍射仪(XRD)对亚微米级废弃玻璃粉的活性及水化作用机理进行了分析。结果表明:亚微米玻璃粉不需要任何外物激发因素就具有火山灰活性,28 d龄期时,不同取代率亚微米玻璃粉的活性均超过了75%,尤其是在取代率不超过30%时,活性指数均在85%以上;随着亚微米玻璃粉取代率的增加,水化产物中的氢氧化钙明显减少,水化硅酸钙凝胶(C-S-H)呈微弱的减小趋势但并不明显,说明亚微米玻璃粉在28 d龄期时已经发生火山灰反应,并且反应吸收了部分氢氧化钙晶体。
[Abstract]:Grinding waste glass powder to submicron particle size, and replacing part of cement with equal quality to make clean glass paste specimen, and testing the strength of different ages, The activity and hydration mechanism of sub-micron waste glass powder were analyzed by scanning electron microscope (SEM) and X-ray diffractometer (XRD). The results show that when submicron glass powder has pozzolanic activity for 28 d without any external excitation factor, the activity of submicron glass powder with different substitution rate exceeds 75%, especially when the substitution rate is less than 30%. With the increase of the substitution ratio of submicron glass powder, the calcium hydroxide in hydrated products decreased obviously, and the C-S-H of hydrated calcium silicate gel showed a slight decreasing trend, but it was not obvious. The results show that the reaction of pozzolanic ash has already taken place in the sub-micron glass powder at the age of 28 days and some calcium hydroxide crystals have been absorbed by the reaction.
【作者单位】：桂林理工大学土木与建筑工程学院;广西建筑新能源与节能重点实验室;
【基金】：国家自然科学基金(51468014) 桂林理工大学博士项目启动基金
【分类号】：TQ171.7

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