在带有颗粒基的青路面中对层间剪切行为进行宏观中等尺度等价评估
Fang Wang1, Zhouqi Zhang1, Chaoliang Fu2
1School of Civil Engineering, Anhui Jianzhu University, Hefei 230601, China.
Materials (Basel, Switzerland)
|September 13, 2025
概括
一个新的模型通过分析石底层相互作用来增强青路面设计. 用烯-丁-烯 (SBS) 改性青显示出最高的间层强度,优化了路面的耐用性,减少了反射裂纹.
科学领域:
- 土木工程 土木工程是指土木工程.
- 材料科学 材料科学 材料科学
- 地质技术工程 地质技术工程
背景情况:
- 青路面的石底层有助于通过分散应力来减少反射裂纹.
- 砂基的松散性质造成了复杂的层间接触,影响了剪切性能.
- 精确模拟这些相互作用对于提高路面耐用性至关重要.
研究的目的:
- 开发一个中等尺度的有限元素模型来模拟石基石路面上的层间接触.
- 分析粘合剂类型的影响,青表面层特性,以及负载对层间剪切强度的影响.
- 建立一个预测模型,将中等尺度机制与路面设计的实际工程应用联系起来.
主要方法:
- 一个中等尺度有限元素模型的开发.
- 模型与宏观测试的结合.
- 对包括粘合剂类型 (SBS改性青,SBR改性乳化青,未改性基) 的因素进行系统分析,涂层率,青表面层特性 (聚合物大小,空隙比率) 和外部负荷.
主要成果:
- 修改过氨酸-丁氨酸-氨酸 (SBS) 的青表现出最高的间层强度.
- 用SBS修改的青的最佳切削强度是在0.9L/m2的涂层速率下实现的.
- 切削强度随着施加的负载而增加,但随着空隙比率的提高和表面过程中更大的名义最大积聚体大小而减少.
结论:
- 开发的宏观-半导体预测模型有效地将剪切强度与关键影响因素联系起来.
- 该模型为优化带有石基础的青路面的设计和性能提供了理论支持.
- 这些发现有助于减少反射裂纹,提高青路面的寿命.
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