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Updated: May 10, 2025

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A Bending Test for Determining the Atterberg Plastic Limit in Soils
Published on: June 28, 2016
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测试扩展聚乙烯轻质土壤的小菌株动态特征:改革工程检测实验教学
Ping Jiang1, Xinghan Wu1, Lejie Chen1
1Shaoxing Key Laboratory of Interaction Between Soft Soil Foundation and Building Structure, School of Civil Engineering, Shaoxing University, Shaoxing 312000, China.
Polymers
|April 28, 2025
概括
扩展聚乙烯 (EPS) 轻质土壤 (ELS) 在小压力下显示出高动态剪模. 它的性能受到EPS含量,限制压力和固化年龄的影响,为更好的预测而开发了一种新的损伤模型.
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
- 土壤力学 土壤力学
背景情况:
- 扩展聚乙烯 (EPS) 轻质土壤 (ELS) 是一种用于斜坡稳定和软土壤沉积减少的地球合成材料.
- 了解ELS的小应变动态特性对于其在土木工程中的有效应用至关重要.
- 现有的模型可能无法完全捕捉不同条件下ELS的复杂行为.
研究的目的:
- 为了研究ELS的小菌株动态特性.
- 评估EPS颗粒含量,封闭压力和固化年龄对ELS动态剪切模量 (G) 的影响.
- 开发一个准确的损害模型,以小菌株下ELS的行为.
主要方法:
- 在ELS样本上进行了共振柱测试.
- 参数变化包括EPS颗粒含量 (20-60%),限制压力 (50-200kPa) 和固化年龄 (3,7,28天).
- 使用小张力范围 (10-6到10-4) 来测量动态剪切模量 (G).
主要成果:
- 在小压力下,ELS表现出高动态切削模量.
- 动态剪切模量 (G) 随着限制压力和固化年龄的增加而增加,但随着EPS含量和动态剪切应变的增加而减少.
- 最大切削模量 (Gmax) 从64 MPa到280 MPa,由于EPS含量减少了60%,由于压力和年龄分别增加了11%和55%.
- 开发了一种包含EPS含量和限制压力的新型损伤模型,其性能优于Hardin-Drnevich模型.
结论:
- EPS含量,限制压力和固化年龄显著影响ELS的小应变动态特性.
- 开发的损坏模型准确地描述了ELS减弱行为,有助于工程设计.
- 该研究整合了材料科学,土壤力学和环境保护,为建筑和实验教育提供了教育和实际影响.
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