掺玻璃粉水泥净浆水化性能

发布时间：2018-07-25 11:55

【摘要】：以废弃啤酒瓶制成玻璃粉,配制掺玻璃粉水泥净浆.测试掺玻璃粉水泥净浆抗压强度;采用X射线衍射分析、热重-差热分析、扫描电子显微镜分析及能谱分析技术研究掺玻璃粉水泥净浆水化产物的种类、含量、微观形貌及元素组成.结果表明:随着玻璃粉掺量(质量分数)的增加,水泥净浆抗压强度减小.掺玻璃粉水泥净浆水化产物主要有C-S-H凝胶、Ca(OH)2及少量钙矾石、水化铝酸钙等.由于玻璃粉的火山灰反应消耗Ca(OH)2,随着玻璃粉掺量的增加和龄期的延长,水泥净浆水化产物中Ca(OH)2含量(质量分数)逐渐减少.掺玻璃粉水泥净浆微观结构较为致密,其水化产物C-S-H凝胶形态与纯水泥净浆有所不同,多由不规则的短柱状及薄片状凝胶粒子交叉结合在一起形成网络结构,为低钙硅比(质量比)C-S-H凝胶.玻璃粉具有火山灰活性.
[Abstract]:Glass powder is made from waste beer bottle and cement paste mixed with glass powder is prepared. The compressive strength of cement paste mixed with glass powder was tested, the kinds and contents of hydration products of cement paste were studied by means of X-ray diffraction, thermogravimetry, scanning electron microscopy and energy spectrum analysis. Microstructure and elemental composition. The results show that the compressive strength of cement paste decreases with the increase of glass powder content (mass fraction). The main hydration products of cement paste doped with glass powder are C-S-H gel Ca (OH) 2 and a small amount of ettringite, calcium aluminate hydrate and so on. Due to the consumption of Ca (OH) _ 2 in the pozzolanic reaction of glass powder, the content of Ca (OH) _ 2 (mass fraction) in the hydration product of cement decreases with the increase of the content of glass powder and the prolongation of the age. The microstructure of cement paste mixed with glass powder is compact, and its hydration product, C-S-H gel, is different from that of pure cement paste, and it is mostly composed of irregular short columnar and thin sheet gel particles to form a network structure. It is a C-S-H gel with low Ca / Si ratio (mass ratio). Glass powder has pozzolanic activity.
【作者单位】：桂林理工大学广西建筑新能源与节能重点实验室;武汉大学水资源与水电工程科学国家重点实验室;中国电建集团华东勘测设计研究院有限公司;
【基金】：国家自然科学基金资助项目(51208391) 广西自然科学基金资助项目(2012GXNSFBA053151) 广西建筑新能源与节能重点实验室开放基金资助课题(11-03-21-13)
【分类号】：TU528

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