Micropore Structure of Cement-Stabilized Gold Mine Tailings

被引：7
|
作者：
Lee, Joon Kyu [1 ]
Shang, Julie Q. [2 ]
机构：
[1] Univ Seoul, Dept Civil Engn, Seoul 02504, South Korea
[2] Western Univ, Dept Civil & Environm Engn, London, ON N6A 5B9, Canada
来源：
MINERALS | 2018年 / 8卷 / 03期
基金：
新加坡国家研究基金会; 加拿大自然科学与工程研究理事会;
关键词：
tailings; cement; microstructure; mercury intrusion porosimetry; activation; CALCIUM-CHLORIDE; FLY-ASH; MICROSTRUCTURE;
D O I：
10.3390/min8030096
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
Mine tailings have often to be stabilized by mixing them with cementing agents. In this study, the pore structure of gold tailings stabilized with Portland cement was evaluated by means of mercury intrusion porosimetry. The investigation was conducted on samples prepared with different fractions of tailings and cement as well as on samples activated with elevated temperature curing and chemical (CaCl2) addition. It was observed that all mixed samples exhibit a mono-modal pore size distribution, indicating that the cement-stabilized tailings are characterized by a single-porosity structure. The results also showed that the higher fraction of tailings and cement leads to a dense and finer pore structure. The total porosity of mixture samples decreases with increasing curing temperature and CaCl2 concentration due to the acceleration of hydration reaction.
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页数：9
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