实验研究时间依赖的质性质和混凝土细尾矿回填的机械性能与聚烯纤维混合
Yongqiang Hou1,2, Shenghua Yin3, Xin Chen4
1School of Mining Engineering, Anhui University of Science and Technology, Huainan, 232001, China.
Environmental science and pollution research international
|September 6, 2023
概括
将纤维添加到精细的尾矿泥中,可以提高其流动性和强度. 最佳的纤维含量增强了压力强度,而固化时间影响了填充后的质学和微观结构发展.
科学领域:
- 材料科学 材料科学 材料科学
- 地质技术工程 地质技术工程
- 类风病学 类风病学 类风病学
背景情况:
- 细尾矿泥在回填应用中存在质挑战.
- 纤维增强被探索以提高泥性能和回填性能.
研究的目的:
- 为了研究纤维含量和固化时间对微细尾矿泥的风质性质的影响.
- 分析纤维含量和固化时间对精细尾矿回填的压力强度和微观结构的影响.
主要方法:
- 制备有不同质量度和纤维含量的细尾矿泥.
- 在不同纤维含量和固化时间下进行风湿学参数测试 (产量应力,塑料粘度,厚度变化).
- 压力强度测试和微结构分析固化细尾矿的填充样本.
主要成果:
- 由于纤维桥梁效应,泥产量应力,塑料粘度和厚度度随着纤维含量 (0.21.2%) 的增加而增加.
- 风湿学参数和厚度最初会随着固化时间 (02.5小时) 的增加而增加,但在1小时后的影响会减弱.
- 填充后的压缩强度随着固化年龄 (356天) 的增加而增加,随着时间的推移,收益会减少.
- 最大压力强度的最佳纤维含量为0.6%;较高的含量会降低强度.
- 延长的固化时间减少了大孔,导致更紧的回填微观结构.
结论:
- 纤维增强显著增强了细尾矿泥和回填的整形学和机械性能.
- 治愈时间在早期的风湿病和长期的力量发展中起着关键作用,回报率下降.
- 优化纤维含量和固化时间对于有效的细尾矿填充设计至关重要.
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