赤泥基似膏體充填材料水化特性研究

陳蛟龍; 張娜; 李恒; 趙喜彬; 劉曉明

doi:10.13374/j.issn2095-9389.2017.11.005

赤泥基似膏體充填材料水化特性研究

doi: 10.13374/j.issn2095-9389.2017.11.005

1) 北京科技大學冶金與生態工程學院, 北京 100083
2) 中國地質大學(北京) 材料科學與工程學院, 北京 100083

基金項目:

國家自然科學基金資助項目(51574024,51604026)

中央高校基本科研業務費專項資金資助項目(FRF-BR-16-026A).

詳細信息

中圖分類號: TB321
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出版歷程
- 收稿日期: 2017-06-21

Hydration characteristics of red-mud based paste-like backfill material

1) School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
2) School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China

摘要

摘要: 以赤泥、煤矸石等工業固廢為主要原料制備赤泥基似膏體充填材料,采用X射線衍射分析、傅氏轉換紅外線光譜分析、熱重-示差掃描量熱分析和掃描電子顯微鏡-能譜分析等測試手段研究赤泥基似膏體充填材料的水化特性.結果表明,本試驗條件下,赤泥基似膏體充填材料的最優配比為編號E03試驗,即膠結料:赤泥:煤矸石:添加劑質量比為1:16:5:11,固相的質量分數為70%,28 d單軸抗壓強度為5.49 MPa.赤泥基似膏體充填材料不同齡期的水化產物主要為斜方鈣沸石(CaAl₂Si₂O₈·4H₂O)和鈣礬石(AFt),隨著水化反應的進行,水化產物的數量明顯增多,且鈣礬石由水化初期的針狀逐漸轉變為棒狀,有助于充填體強度的發展.
- 赤泥 /
- 似膏體充填材料 /
- 水化產物 /
- 微觀結構
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-energydispersive 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 gismondine (CaAl₂ Si₂O₈·4H₂O) 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.
- red-mud /
- paste-like backfill material /
- hydration products /
- microstructure

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參考文獻(7)

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