标题：Properties and mechanism of mine tailings solidified and filled with fluorgypsum-based binder material
作者：Huang, XQ(Huang Xuquan); Zhou, M(Zhou Min); Hou, HB(Hou Haobo); Zhu, X(Zhu Xi); Rong, H(Rong Hao)
来源出版物：JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION 卷：27 期：3 页：465-470 出版年：JUN 2012
摘要：The properties and microscopic structure of tailings solidification bodies, the hardening mechanism of the fluorgypsum-based binder material (FBBM) and tailings solidification mechanism were investigated. FBBM consisted of 40% fluorgypsum, 25%-50% blast furnace slag, 10%-35% ordinary Portland cement clinker(OPCC) and 1% activator, which was good material in binding iron ore tailings.XRD analysis showed that the properties of tailings solidification bodies was related to its ettringite content.SEM and XRD analyses of tailings solidification bodies showed that the chemical reaction was produced between FBBM and tailings in the whole hydration process. The hydration of the resulting gel material covered the surface of the tailings particles and formed a gel structure. A large number of ettringite crystals and the remaining board-like gypsum crystals took each end and constituted the structural skeleton. The filamentous network-like calciumsilicate-hydrate(C-S-H) gel bonded firmly together with ettringite crystals, dehydrated gypsum crystals and granular tailings, and formed an extremely dense whole.
作者关键词：fluorgypsum, tailings solidification body, blast furnace slag, toxicity, ettringite
扩展关键词：ALKALI-AGGREGATE REACTION; CEMENTED-PASTE BACKFILL; TEMPERATURE; EXPANSION; CONCRETE; STRENGTH; SLAG
通讯作者地址：Zhou, M (通讯作者),Wuhan Univ, Dept Resource & Environm Sci, Wuhan 430079, Peoples R China
[Huang Xuquan; Zhou Min; Hou Haobo; Zhu Xi; Rong Hao]Wuhan Univ, Dept Resource & Environm Sci, Wuhan 430079, Peoples R China
