在干燥和潮湿周期下,水泥-石膏红色粘土的道路性能
Yunke Liu1, Kaisheng Chen1, Hao Jian1
1School of Civil Engineering, Guizhou University, Guiyang, Guizhou Province, China.
PloS one
|December 19, 2024
概括
水泥-合石膏-红色粘土混合物在湿干循环下显示强度降低,但符合道路施工标准. 一个水稳定器提高了耐用性,使材料适合高速公路路面.
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:
- 道路建设往往面临着材料耐用性和稳定性的挑战.
- 调查可持续和经济有效的道路床材料替代品至关重要.
- 作为一种副产品的石,为土木工程应用提供了利用的机会.
研究的目的:
- 在循环干湿条件下评估水泥-石膏-红粘土 (CPRC) 混合物的道路性能和机制.
- 评估CPRC作为高速公路项目的路床填充材料的适用性.
- 了解水稳定剂 (SCA-2) 对CPRC混合物的特性的影响.
主要方法:
- 系统地研究不同比例的CPRC混合物 (水泥,石,红色粘土,SCA-2).
- 在干燥和潮湿循环下进行不受限制的压力强度和加利福尼亚轴承比率 (CBR) 测试.
- 在测试道路 (国家公路G210) 上进行验证,以评估现实世界的性能.
- 微结构分析以了解水稳定剂的作用.
主要成果:
- CPRC不受限制的压力强度随着湿干周期下降,在初始周期后稳定.
- CBR值符合高速公路和I类道路设计规范的要求.
- 通过改变矿物成分和减少漏通道,SCA-2降低了混合物的强度,但显著提高了水的稳定性.
- 测试道路性能显示平滑,密集的路床没有损坏和定居在特定范围内的迹象.
结论:
- CPRC混合物,特别是与SCA-2混合物,显示出适用于道路床应用的工程性能.
- 水稳定器提高了材料的长期耐用性和防水性.
- CPRC (水泥5%,石47.5%,红粘土47.5%,SCA-2 5%) 是高速公路和主要道路基层填充物的可行选择.
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