大颗粒尺寸青混合物的数值测试方法和机械性能评估
Chengduo Qian1, Minghao Mu1, Bingchen Zhu2
1Innovation Research Institute of Shandong Hi-Speed Group Ltd, Jinan, Shandong, China.
PloS one
|January 15, 2025
概括
大石头青混合物 (LSAM-50) 为耐用路面提供了出色的技术和经济效益. 建立了一种经过验证的数值测试方法和最佳样本大小 (Φ200mm×h160mm),与室内测试相比,显示的误差不到10%.
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
- 铺路工程工程 铺路工程
背景情况:
- 大型石头青混合物,标称最大堆积体大小为53毫米 (LSAM-50),具有显著的技术和经济优势.
- LSAM-50将成为建造具有中国特色的长寿命青路面的关键组件.
研究的目的:
- 彻底调查LSAM-50的机械性能和影响因素.
- 开发一个数值测试方法来评估LSAM-50的机械性能.
- 通过组合的数值和室内实验来确定适合LSAM-50性能测试的样本大小.
主要方法:
- 开发了一个数值测试方法来测试LSAM-50的机械性能.
- 使用10−3秒/步的计算时间步骤和特定的负载速率 (单轴压缩时2毫米/分钟,分割时50毫米/分钟).
- 在数值模拟和室内测试之间进行比较分析,以验证结果并确定最佳样本大小.
主要成果:
- 针对LSAM-50的优化数值测试参数包括10-3秒/步的时间步骤和2毫米/分钟 (无轴压缩) 和50毫米/分钟 (分裂) 的加载速度.
- 当样本大小达到200×160mm时,LSAM-50测试的尺寸效应会被消除,确定 Φ200mm×h160mm作为合理的样本大小.
- 与室内测试结果相比,开发的数值测试方法显示出较低的误差 (少于10%).
结论:
- 对于LSAM-50的数值测试方法是准确和可靠的,与经验数据的偏差最小.
- 已确定的合理样本尺寸为 Φ200mm×h160mm,确保对 LSAM-50 的机械性能评估具有代表性.
- LSAM-50为建造高性能,持久的青路面提供了可行和高效的解决方案.
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