实验研究的机械和液压性质的桑坦改善了低流体极限泥土的土壤
Xutao Zhang1, Wenyue Cao2, Xiao Zhang2
1School of Architecture and Civil Engineering, Liaocheng University, Liaocheng, 252059, China. zhangxutao@lcu.edu.cn.
Scientific reports
|May 14, 2024
概括
赞坦显著提高了低液体极限泥土的性能,提高了强度和降低了透性. 最佳效果是使用2%的香丹和7天的固化,以获得更好的路床和斜坡应用.
科学领域:
- 地质技术工程 地质技术工程
- 材料科学 是一种材料科学.
背景情况:
- 北中国的低液量极限泥土土不适合路床和坡道.
- 改善土壤特性对于基础设施发展至关重要.
研究的目的:
- 为了研究香甘作为添加剂的有效性,用于低液体限制的泥土.
- 为了确定最佳的剂量和治愈期来改善香甘.
主要方法:
- 实验室对土壤样本进行测试,使用不同剂量和固化时间的香草甘.
- 测量不受限制的压力强度,透性和分解.
- 扫描电子显微镜 (SEM) 分析观察微观结构变化.
主要成果:
- 香草显著增加了不受限制的压力强度,随着剂量增加和治愈年龄增加,这种强度稳定下来.
- 最佳条件 (2%剂量,7天疗效) 导致了实质性的强度改善.
- 透性大幅降低 (至原始的1.10%),并将分解降到最低.
- SEM揭示了空隙填充用香糖凝,增强土壤结构.
结论:
- 赞坦是一种有效的改善剂,用于低液量极限的泥土.
- 该添加剂增强机械和液压性能,使土壤适合工程应用.
- 由于桑坦牙凝形成的微观结构变化是提高性能的关键.
相关概念视频
01:14Design Example: Managing Concrete Workability
80
This example deals with managing the workability of concrete for a raft foundation project under hot weather conditions. Workability is crucial for ensuring the concrete is easy to place, compact, and finish. In this scenario, a slump test — a common method to measure the workability of fresh concrete — initially indicated low workability. This was attributed to the rapid water loss from the concrete mix, exacerbated by the high temperatures causing the course aggregates to heat up.
80
01:17Soundness of Cement
162
The soundness of cement refers to the ability of cement paste to retain its volume after setting. Unsound cement can lead to expansion and structural damage due to the presence of free lime, magnesia, and calcium sulfate. Free lime hydrates very slowly, expanding and causing unsoundness, which is difficult to detect because it intercrystallizes with other compounds. Magnesia also reacts with water, forming crystals that can disrupt the cement's structure. Calcium sulfate can create...
162