使用工业废弃物灰进行可持续的土壤稳定:增强扩张性粘土特性
Sultan Almuaythir1, Muhammad Syamsul Imran Zaini2, Muzamir Hasan2
1Department of Civil Engineering, College of Engineering in Al-Kharj, Prince Sattam bin Abdulaziz University, Al-Kharj, 11942, Saudi Arabia.
Heliyon
|December 6, 2024
概括
工业废物材料如二氧化烟雾和GGBS有效地稳定了广的粘土土壤. 这些环保添加剂减少了塑性和胀,同时显著增加了土壤的强度和耐用性.
科学领域:
- 地质技术工程 地质技术工程
- 材料科学 材料科学 材料科学
- 环境工程 环境工程
背景情况:
- 广的粘土土壤在土木工程项目中存在重大挑战,因为它们的体积变化潜力很大.
- 传统的土壤稳定方法通常涉及能源密集型材料,具有环境缺陷.
- 人们越来越需要可持续和经济有效的替代方案来改善有问题的土壤.
研究的目的:
- 评估各种工业废物材料作为扩张性粘土土壤稳定剂的有效性.
- 研究这些添加剂对土壤物理,机械和微观结构性质的影响.
- 确定这些废物材料作为土壤稳定环保替代品的潜力.
主要方法:
- 实验室对用烟 (SF),水泥炉灰尘 (CKD),碳化残留物 (CCR),米灰 (RHA) 和砂粒高炉渣 (GGBS) 处理的广粘土进行测试,比例为3%,6%和9%.
- 评估液体极限,可塑性指数,膨胀潜力,不受限制的压力强度 (UCS) 和剪切强度的变化.
- 微结构分析以了解结合机制和化合物形成.
主要成果:
- 随着工业废物的添加,观察到液体极限 (高达37.66%) 和可塑性指数 (高达74.76%) 的显著降低.
- 广的粘土土壤的膨胀潜力大大减少.
- 不受限制的压力强度 (UCS) 显著增加,达到1582.91 kPa在30天内达到9%的GGBS,表明增强的机械性能.
- 微结构分析证实了新的水泥化合物的形成,从而改善了土壤颗粒的结合和耐用性.
结论:
- 工业废物材料,包括SF,CKD,CCR,RHA和GGBS,是广泛的粘土土壤的有效环保稳定剂.
- 这些添加剂显著改善了广的粘土土壤的物理和机械性能,减少了有问题的体积变化.
- 这些工业废物的使用为土壤稳定提供了可持续的方法,为环境提供了好处,并提高了工程性能.
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