废轮胎颗粒含量对洛斯底层材料的压缩行为和孔隙结构的影响
Xueyu Cao1,2, Yang Liu2,3, Xun Wu4
1School of Highway, Henan College of Transportation, Zhengzhou 451460, China.
Materials (Basel, Switzerland)
|November 27, 2025
概括
通过将废旧轮胎混合到子亚等级来回收废旧轮胎,可以改善土壤的特性. 最佳的轮胎颗粒含量取决于应力,转移变形机制,以实现可持续的地质工程.
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:
- 废旧轮胎的低回收率带来了环境挑战.
- 废旧轮胎在洛斯分级的不足利用限制了可持续的建筑实践.
研究的目的:
- 为了研究用轮胎颗粒修饰的洛斯的压缩变形特征.
- 分析不同轮胎颗粒含量对孔隙结构,压缩参数和变形机制的影响.
- 开发一个轮胎衍生聚合物-松混合物 (TDA-LMs) 的压缩行为预测模型.
主要方法:
- 一维压缩测试. 一维压缩测试.
- 循环装载-卸载试验. 循环装载-卸载试验.
- 对孔隙结构演变,压缩参数 (系数,模量,体积系数) 和变形机制的分析.
- 开发压力和内容依赖的预测模型.
主要成果:
- 对TDA-LM压缩行为观察到明显的剂量值和应力依赖 (30%低于100kPa,40%高于100kPa).
- 中低轮胎含量混合物表现出应变硬化,而纯轮胎样本显示出模量软化.
- 主要的变形机制从土壤骨架的屈服转变为主导的弹性变形,轮胎含量增加.
- 超过85%的变形发生在初始加载过程中,这表明早期的颗粒-土壤界面重组.
结论:
- 轮胎颗粒修饰为洛斯亚级工程提供了一个可持续的解决方案.
- 压缩模量和体积压缩系数的预测模型显示出高精度 (R2 > 0.96).
- 这些发现为在地质技术应用中利用废轮胎提供了理论基础和实际设计参数.
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