使用环保合成聚合物作为沙土稳定剂的应用
Nathália Freitas Boaventura1, Thiago Freitas de Porfírio Sousa2, Michéle Dal Toé Casagrande1
1Department of Civil and Environmental Engineering, University of Brasilia, Brasilia 70910-900, Brazil.
Polymers
|December 23, 2023
概括
这项研究表明,将合成聚合物添加到巴西的沙土中,可以改善其机械性能,如剪切强度,使其适合地质工程项目而不会对环境造成伤害. 更高的聚合物度和更长的固化时间产生更好的土壤稳定结果.
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
- 环境科学 环境科学
背景情况:
- 改善土壤对于基础设施的发展至关重要,尤其是在生态敏感地区.
- 传统方法可能会带来环境风险,需要环保的替代方案.
- 沙土通常需要稳定,以满足工程需求.
研究的目的:
- 评估使用合成聚合物改善沙性土壤的技术可行性.
- 评估聚合物度和固化时间对土壤特性的影响.
- 确保拟议的土壤稳定方法在环境上是合理的.
主要方法:
- 机械测试:直接剪切测试以确定剪切应力,摩擦角度和凝聚力.
- 液压测试:透性的评估.
- 微结构和化学分析:X射线衍射 (XRD),X射线光/能量散射X射线 (XRF/EDX) 和扫描电子显微镜 (SEM).
- 复合制剂:砂土与合成聚合物混合,度为2.5%和5%,经过45天的固化.
主要成果:
- 增长的固化时间和聚合物度显著提高了剪切应力,摩擦角度和凝聚力.
- 5%的聚合物度 (SP_5%) 与2.5% (SP_2.5%) 和未经处理的土壤相比显示出更好的性能.
- 微观结构分析证实,聚合物起到固剂的作用,形成一种粘结土壤粒的薄膜.
- XRD和XRF/EDX分析提供了对化学和矿物学变化的见解.
结论:
- 合成聚合物有效地改善了沙性土壤的机械性能,作为凝固剂.
- 两种测试的聚合物剂量 (2.5%和5%) 在技术上是可行的地质技术应用.
- 基于聚合物的土壤稳定剂为敏感地区的土壤改善提供了一个有希望的,潜在的环保解决方案.
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