在水泥稳定基层中优化钢渣的利用:从冷解和疲劳测试的见解
Peng-Cheng Song1, Guo-Xin Chen2, Ying-Jie Chen1
1College of Hydraulic and Civil Engineering, Xinjiang Agricultural University, Urumqi 830052, China.
Materials (Basel, Switzerland)
|June 19, 2024
概括
这项针对高速公路用水泥稳定钢的研究揭示了融和疲劳损伤机制. 材料在个体应力下线性降解,但在结合的冷解和疲劳负荷下显示出快速的初始曲模量下降.
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
- 土木工程 土木工程是指土木工程.
背景情况:
- 钢渣是高速公路项目的可行的建筑材料.
- 了解环境和机械压力下的材料降解对于基础设施的寿命至关重要.
研究的目的:
- 在冷解和疲劳负荷下研究水泥稳定钢的机械性能.
- 使用3D扫描建模样品行为,并建立非线性回归方程.
- 分析损坏机制和物质性质变化.
主要方法:
- 3D扫描技术可以创建现实的钢样本模型.
- 在冷解周期,疲劳负荷和合条件下进行机械测试.
- 压缩损伤阶段和裂粒子相互作用的分析.
主要成果:
- 样品压缩损伤表现出线性弹性,峰值可塑性和峰值后的衰退阶段.
- 剪切损伤占主导地位,在剪切区域有最大的接触力.
- 在个体应力下,屈曲强度和疲劳寿命线性下降.
- 柔性模块在不同的阶段下降,趋向于线性衰变,应力增加.
- 结合冷解和疲劳负荷,导致模在2年内下降50%左右,随后持续下降.
结论:
- 在水泥稳定的钢中,在环境和机械应力相结合的情况下,表现出复杂的损伤行为.
- 该研究为设计使用新疆钢的可持续高速公路基础设施提供了关键数据.
- 材料降解的预测模型对于长期性能评估至关重要.
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