亚微米玻璃粉制备及其水化性能的研究

摘要

The waste glass powder grinding to achieve submicron particle size,and quality to replace part of cement made of glass powder specimen,by testing the strength of different curing age,and by using electron microscope (SEM) and X-ray diffraction (XRD),the activity and hydration mechanism of submicron waste glass powder were analyzed.The research shows that the submicron powder glass powder has volcano activity in the absence of any external cause of the excitation,at the age of 28 d,the activity of submicron glass powder with different substitution rate is more than 75％,especially in the substitution rate is less than 30％,the activity index is above 85％;with the increase of submicron glass powder substitution rate,calcium hydroxide in the hydration products significantly reduces,but the decreasing trend of hydrated calcium silicate gel (C-S-H) is not obvious,that show submicron glass powder has occurred volcano ash reaction at 28 d,and the reaction absorption of calcium hydroxide crystals.%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.