泵送劑對膏體抗壓強度的影響試驗研究及機理分析

李公成; 王洪江; 吳愛祥; 楊鵬

doi:10.13374/j.issn2095-9389.2016.05.001

泵送劑對膏體抗壓強度的影響試驗研究及機理分析

doi: 10.13374/j.issn2095-9389.2016.05.001

李公成^1,2,
王洪江^1,2, ,,
吳愛祥^1,2,
楊鵬³

1. 北京科技大學土木與環境工程學院, 北京 100083;
2. 北京科技大學金屬礦山高效開采與安全教育部重點實驗室, 北京 100083;
3. 中色非洲礦業有限公司, 基特韋 22592, 贊比亞

基金項目:

國家“十二五”科技支撐計劃資助項目(2012BAB08B02)

國家自然科學基金項目資助項目(51374034)

國家自然科學基金資助項目(51304011)

詳細信息

通訊作者:
王洪江,E-mail:wanghj1988@126.com

中圖分類號: TD853
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- 被引次數: 0
出版歷程
- 收稿日期: 2015-10-26
- 網絡出版日期: 2021-07-10

Experimental study and mechanism analysis on the effect of pumping agents on the compressive strength of paste slurries

1. School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. Key Laboratory of the Ministryof Education for High Efficient Mining and Safety of Metal Mines, University of Science and Technology Beijing, Beijing 100083, China;
3. Africa Mining Public Limited Company, China Nonferrous Metals Co., Ltd., Kitwe 22592, Zambia

摘要

摘要: 泵送劑能有效改善膏體料漿流動性能,然而其對膏體料漿凝結性能的影響機理尚未明確.針對這一問題,本文進行泵送劑的抗壓強度試驗和環境掃描電鏡觀察.強度試驗結果表明:泵送劑可有效改善膏體料漿凝結性能,泵送劑摻量越高不同齡期的膏體凝結性越好.環境掃描電鏡觀察結果表明:泵送劑添加后,大尺寸絮團減少,料漿內孔隙減少,改變了膏體微觀結構.基于應用計算機圖像處理技術和分形理論,計算膏體微觀結構計盒維數,量化分析膏體微觀結構.最終對泵送劑改善膏體凝結性能的機理進行分析,認為泵送劑通過改變絮團大小和數量、孔隙率、水化反應等方面影響膏體凝結性能.
- 膏體 /
- 藥劑 /
- 凝結性 /
- 微觀結構 /
- 分形維數
Abstract: Pumping agents can improve the fluidity of paste slurries. However,the effecting mechanism of pumping agents on the coagulability of paste slurries is not made clear. To solve this problem,a pumping agent was added for compression strength tests and environmental scanning electron microscopy(ESEM) observations. Compression strength test results indicate that the pumping agent can improve the coagulability of paste slurries,and the more the pumping agent amount,the better the coagulability of paste slurries.ESEM observation results show that large size floccules and pores decrease after adding the pumping agent,and the paste's microstructure is changed. The fractal dimensions of the paste's microstructure images were calculated based on the image processing technology and fractal theory,and the structure was quantitatively analyzed. The mechanism of improving the coagulability of paste slurries was discussed. It is found that the coagulability of paste slurries is affected by changing the size and number of flocculants,the porosity and the hydration reaction.
- pastes /
- agents /
- coagulability /
- microstructure /
- fractal dimension