在冷解周期期间,具有不同初始水含量的状石板的损害演变特征
Zhiquan Yang1, Qinghao Zhao1, Jin Gan2
1Faculty of Public Safety and Emergency Management, Kunming University of Science and Technology, Kunming 650093, China; Key Laboratory of Geological Disaster Risk, Prevention and Control and Emergency Disaster Reduction of Ministry of Emergency Management of the People's Republic of China, Kunming 650093, China; Key Laboratory of Early Rapid Identification, Prevention and Control of Geological Diseases in Traffic Corridor of High Intensity Earthquake Mountainous Area of Yunnan Province, Kunming 650093, China.
冷解周期显著损害了岩,改变了其微观结构并降低了机械强度. 增加的水含量加剧了这种融 (F-T) 损害,影响了寒冷地区的基础设施.
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:
- 关于融 (F-T) 损伤机制在岩石中的全面研究是有限的.
- 了解F-T损害对于寒冷地区的基础设施至关重要.
研究的目的:
- 为了研究岩中F-T损伤的进化特征.
- 分析初始含水量和F-T周期对石板性能的影响.
主要方法:
- 扫描电子显微镜 (SEM) 用于微观结构分析.
- 用X射线衍射 (XRD) 和X射线光 (XRF) 来进行相位组合.
- 对于机械参数的单轴压缩测试.
- 对不同初始含水量样本进行F-T循环分析.
主要成果:
- F-T循环和水含量显著改变了石板的微观结构,增加了表面粗度和放松颗粒排列.
- 不稳定的粘土矿物质如高酸经过水化,在和条件下30个F-T循环后,它们的含量减少了近50%.
- 机械参数随着F-T周期呈指数级下降,而孔隙性增加,随着初始含水量增加,恶化升级.
- F-T损伤的演变表明,从温和到形和形的生长阶段的过渡.
结论:
- 无论是F-T循环还是初始含水量都是状石板恶化的重要因素.
- 该研究为评估和预防寒冷地区的FT灾难提供了理论指导.
- 这些发现对于在冷解环境下设计和维护结构至关重要.
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