Study on Mechanical Properties of Improved High Liquid Limit Soil Based on Solid Waste

Authors

ZHANG Yafei, School of Transportation, Changsha University of Science & Technology, Changsha, Hunan 410114, ChinaFollow
QIN Yalan, School of Transportation, Changsha University of Science & Technology, Changsha, Hunan 410114, China
WU Jiacheng, School of Transportation, Changsha University of Science & Technology, Changsha, Hunan 410114, China
ZHANG Rui, School of Transportation, Changsha University of Science & Technology, Changsha, Hunan 410114, China; National Key Laboratory of Green and Long-Life Road Engineering in Extreme Environment, Changsha University of Science & Technology, Changsha ， Hunan 410114, ChinaFollow
GAO Yingli, School of Transportation, Changsha University of Science & Technology, Changsha, Hunan 410114, China; National Key Laboratory of Green and Long-Life Road Engineering in Extreme Environment, Changsha University of Science & Technology, Changsha ， Hunan 410114, China
ZHU Zhanghuang, School of Transportation, Changsha University of Science & Technology, Changsha, Hunan 410114, China
LI Lu, School of Transportation, Changsha University of Science & Technology, Changsha, Hunan 410114, China

Corresponding Author

张锐, 男, 博士, 教授. E-mail: zr@csust.edu.cn

Abstract

To improve the application of the solid waste polymer-modified high liquid limit soil as filler in the upper embankment or road bed work area,this study prepared colloidal polymer and improved materials of traditional cement by using industrial solid waste (fly ash,steel slag,etc.) and compared them with the improved high liquid limit soil to investigate its mechanical properties and economic benefits.The mechanical properties of high liquid limit soil improved by the colloidal polymer of solid waste,as well as its stability and durability when immersed in water were studied through a liquid-plastic limit test,a laboratory compaction test,a shrinkage test,a California bearing ratio (CBR ) test,and a dry-wet cycle test,and the improvement mechanism was analyzed.The effects of solid waste content,number of dry-wet cycles,and compaction degree on the mechanical properties of improved high liquid limit soil were analyzed.The results show that with the increase of solid waste content,the plastic index and liquid limit of improved high liquid limit soil decrease obviously,and the shrinkage coefficient drops greatly.The RCBR value of the improved soil with the compaction degree of 96% and solid waste of 3% and the RCBR value after the dry-wet cycles for 15 times correspond with Specifications for Design of Highway Subgrades (JTG D 30—2015 ),and only small cracks appear during the cycle period and do not run through the sample.In terms of economic benefits,the consumption of solid waste from the use of 3% cement and 4% solid waste filler is 23.8% lower than that of cement under nearly equivalent strength conditions,saving construction costs.The high liquid limit soil improved by solid waste polymer demonstrates good mechanical properties and can be used as the filling material of the upper embankment and road bed.

Publication Date

12-24-2025

DOI

10.14048/j.issn.1671-2579.2025.06.011

First Page

94

Last Page

101

Submission Date

December 2025

Recommended Citation

Yafei, ZHANG; Yalan, QIN; Jiacheng, WU; Rui, ZHANG; Yingli, GAO; Zhanghuang, ZHU; and Lu, LI (2025) "Study on Mechanical Properties of Improved High Liquid Limit Soil Based on Solid Waste," Journal of China & Foreign Highway: Vol. 45: Iss. 6, Article 11.
DOI: 10.14048/j.issn.1671-2579.2025.06.011
Available at: https://zwgl1980.csust.edu.cn/journal/vol45/iss6/11

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