工程科学学报2017，Vol.39Issue(11)：1640-1646,7.DOI:10.13374/j.issn2095--9389.2017.11.005
赤泥基似膏体充填材料水化特性研究
Hydration characteristics of red-mud based paste-like backfill material
摘要
Abstract
Preparation of red-mud based paste-like backfill material using red mud,coal gangue,and other industrial solid wastes was accounted. In order to understand the hydration characteristics of red-mud based paste-like backfill material, X-ray diffraction, Fourier transform infrared spectroscopy,thermogravimetric-differential scanning calorimetry,and scanning electron microscope-energy-dispersive X-ray spectroscopy techniques were used to investigate the hydration products of the hardened paste,which was formed after hydration of raw materials. The results show that the most optimized proportion is the number E03 experiment,in which the mass ratio of cementing material,red mud,coal gangue, and additive agent is 1:16:5:11, the solid mass fraction is 70%, and the uniaxial compressive strength after 28 days is 5.49 MPa. The hydration products of red-mud based paste-like backfill material are mainly gis-mondine (CaAl2Si2O8·4H2O) and ettringite(AFt). As the hydration reaction proceeds,the quantity of hydration products increases significantly. Needle-shaped ettringite forms during the early hydration period and gradually transforms into rod-shaped ettringite;this transformation is helpful in the strength development of the red-mud based paste-like backfill material.关键词
赤泥/似膏体充填材料/水化产物/微观结构Key words
red-mud/paste-like backfill material/hydration products/microstructure分类
通用工业技术引用本文复制引用
陈蛟龙,张娜,李恒,赵喜彬,刘晓明..赤泥基似膏体充填材料水化特性研究[J].工程科学学报,2017,39(11):1640-1646,7.基金项目
国家自然科学基金资助项目(51574024,51604026) （51574024,51604026）
中央高校基本科研业务费专项资金资助项目(FRF--BR--16--026A). （FRF--BR--16--026A）
