关于使用空气增压真空预装加聚烯胺添加物改善疏泥的实验研究
Heng Zhang1,2, Lingfeng Guo2, Chongzhi Tu1
1School of Civil Engineering and Architecture, Wuyi University, Jiangmen 529000, China.
Materials (Basel, Switzerland)
|May 14, 2025
概括
这项研究提高了使用化聚烯胺 (CPAM) 和加压空气注入的疏污泥的真空巩固. 这种结合方法显著改善了水排放和土壤强度,为改善软土壤提供了有效的解决方案.
科学领域:
- 地质技术工程 地质技术工程
- 环境工程 环境工程
- 材料科学 材料科学 材料科学
背景情况:
- 软土壤,特别是疏污泥,在降低含水量和提高承载能力方面存在挑战.
- 传统的真空预装对于高含水量,低透性材料 (如疏污泥) 通常是无效的,导致处理时间延长.
研究的目的:
- 开发和评估一种新的方法,将加压空气注入和聚烯胺 (PAM) 添加相结合,以提高疏污泥的真空巩固效率.
- 确定CPAM添加和气压的最佳条件,以最大限度地提高整合性能.
主要方法:
- 通过注入加压空气和不同度的阴离子聚烯胺 (CPAM) 来增强真空巩固的实验研究.
- 分析水排放,土壤剪切强度和微观结构变化 (多孔性,粒子相互作用).
- 评估CPAM剂量和气压对排水道完整性和土壤破裂的影响.
主要成果:
- 阴离子聚烯胺 (CPAM) 显著改善了水排放,并通过颗粒聚合减少了排水道堵塞.
- 压缩空气注入增加了液压梯度,并诱导了微碎裂,提高了透性和真空传输.
- 最佳性能是在0.075%的CPAM和20kPa的气压下实现的,使水排放量增加了24.5%,剪切强度提高了30.9%.
- 过度的CPAM或气压会对治疗的有效性产生负面影响.
结论:
- 结合CPAM添加和加压空气注入方法,为疏泥巩固提供了比传统的真空预加载更优质的替代方案.
- 微观结构分析证实了土壤增强的紧缩和粒子间的结合.
- 这种技术在广州等沿海地区具有有效的疏污泥处理的巨大潜力.
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