路液（Roadyes<sup>TM</sup>）固化剂改性黄土的力学特性研究

李宏儒; 赵伟龙; 楠钟凯

doi:10.11779/CJGE2023S10043

路液（Roadyes^TM）固化剂改性黄土的力学特性研究 English Version

李宏儒^{1, 2,},
赵伟龙^{1, 2},
楠钟凯^{1, 2}

1.
西安理工大学土木建筑工程学院, 陕西西安 710048
2.
陕西省黄土力学与工程重点试验室, 陕西西安 710048

基金项目:

陕西省自然科学基础项目 2017JM5059

陕西省黄土力学与工程重点试验室项目 13JS073

详细信息

作者简介:
李宏儒(1972—)，男，博士，副教授，主要从事黄土力学与工程的教学和科研工作。E-mail: lhr2008@126.com

中图分类号: TU431
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出版历程
- 收稿日期: 2023-07-04
- 网络出版日期: 2023-11-23
- 刊出日期: 2023-10-31

Mechanical properties of Roadyes^TM-modified loess

LI Hongru^{1, 2,},
ZHAO Weilong^{1, 2},
NAN Zhongkai^{1, 2}

1.
School of Civil and Architectural Engineering, Xi'an University of Technology, Xi'an 710048, China
2.
Shaanxi Provincial Key Laboratory of Loess Mechanics and Engineering, Xi'an 710048, China

摘要

摘要: 黄土具有结构性，难以碾压密实，如何解决黄土压实问题一直是黄土场地地基处理挑战性的技术难题。选取路液（Roadyes^TM）固化剂分别结合石灰和水泥对黄土进行不同组合方案下的改性处理研究。通过压缩、三轴剪切试验，研究了添加剂不同组合下改性黄土的压缩和回弹指数及抗剪强度指标差异性。研究结果表明：路液、路液分别结合石灰、水泥改性黄土，发现固化剂并非掺量越大，改性效果越好。综合对比分析后，路液掺量0.25%，并将其分别和7%石灰，3%的水泥组合使用效果最优，改性黄土抗压缩性、抗剪强度指标均远大于未改性黄土，可显著提高重塑黄土的强度指标，并随着养护期延长，改性黄土力学特性向硬脆性发展。研究成果能够为路液结合石灰或水泥改性黄土的应用提供重要的参考。
- 路液 /
- 改性黄土 /
- 压缩指数 /
- 回弹指数 /
- 抗剪强度指标
Abstract: The loess is structural and difficult to compact. How to solve the problem of loess compaction has always been a challenging technical problem in treatment of loess site foundation. In this study, the Roadyes^TM curing agent combined with lime or cement is used to modify loess under different combinations. Through the compression and triaxial shear tests, the differences of compression and resilience indexes and shear strength indexes of the modified loess with different additive combinations are studied. The results show that for the Roadyes^TM-modified loess with lime or cement respectively, the modification effects are not better with the increasing dosage of the curing agent. Among them, the combination scheme of adding 0.25% Roadyes^TM and 3% cement is better than the 3% cement-modified loess without Roadyes^TM, and it can significantly improve the strength index of the remolded loess. With the extension of the curing period, the modified loess develops towards hard and brittle. The research results may provide important reference for the application of the Roadyes^TM-modified loess with lime or cement.
- Roadyes^TM /
- modified loess /
- compression index /
- rebound index /
- shear strength index

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图 1 不同配方改性黄土压缩试验曲线

Figure 1. Compression test curves of modified loess with different formulations

下载: 全尺寸图片幻灯片

图 2 不同配方改性黄土压缩指数曲线

Figure 2. Compression index curves of modified loess with different formulas

下载: 全尺寸图片幻灯片

图 3 不同配方改性黄土回弹指数曲线

Figure 3. Rebound index curves of modified loess with different formulas

下载: 全尺寸图片幻灯片

图 4 不同条件下改性黄土抗剪强度指标与石灰掺量关系曲线

Figure 4. Curves of shear strength index and lime content of modified loess under different conditions

下载: 全尺寸图片幻灯片

图 5 不同条件下改性黄土抗剪强度指标与水泥掺量关系曲线

Figure 5. Curves of shear strength index and cement content of modified loess under different conditions

下载: 全尺寸图片幻灯片

图 6 不同条件下改性黄土抗剪强度指标的对比曲线

Figure 6. Comparison curves of shear strength indexes of modified loess under different conditions

下载: 全尺寸图片幻灯片

表 1 黄土基本物理性质指标

Table 1 Basic physical properties of loess

干密度
/(g·cm^-3) 含水率/
% 塑限/
% 液限/
% 塑性
指数I_p 土粒相对质量密度G_s

1.44 17.2 20.1 30.3 10.2 2.70

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