Experimental Investigation on Shear Strength Parameters of Lime Stabilized Loess

Liang Jia, Jian Guo, Yanbin Jiang, Yong Fu, Zhidong Zhou, Sin Mei Lim and Xiushao Zhao
Additional contact information
Liang Jia: College of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China
Jian Guo: College of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China
Yanbin Jiang: Geotechnical Engineering Department, Nanjing Hydraulic Research Institute, Nanjing 210024, China
Yong Fu: Department of Civil and Environmental Engineering, National University of Singapore, Singapore 117576, Singapore
Zhidong Zhou: Department of Civil and Environmental Engineering, Washington State University, Pullman, WA 99164-2910, USA
Sin Mei Lim: Department of Civil and Environmental Engineering, National University of Singapore, Singapore 117576, Singapore
Xiushao Zhao: Engineering Research & Development Centre for Underground Technology of Jiangxi Province, East China Jiao Tong University, Nanchang 330013, China

Sustainability, 2019, vol. 11, issue 19, 1-16

Abstract: Loess is a typical collapsible soil, which is widely distributed in the upper and middle areas around the Yellow River of China. The stabilization of loess with lime provides a significant improvement in the physical and the mechanical characteristics of the loess and is therefore widely used in the pavement base and subgrade. Therefore, a systematic investigation of Mohr-Coulomb failure envelope of lime stabilized loess needs to be conducted. In this pursuit, the present research envisages the investigation of the effects of the lime content, porosity and curing time on the strength parameters (friction angle ( φ ) and cohesion ( c )), using a series of triaxial tests performed on lime stabilized loess specimens. The experimental results revealed that the friction angle ( φ ) was independent of the lime content, the porosity and the curing time of the specimen for a given lime stabilized loess, while the factors mentioned above had a significant effect on the cohesion ( c ) of the lime stabilized loess. For a relatively short curing time (7 days), the change in the lime content did not present an obvious effect on the cohesion ( c ) of the stabilized loess. However, when the curing time (28, 90 and 180 days) was longer, the increase of the lime content significantly enhanced the cohesion of the stabilized loess. When the lime content was constant, the cohesion ( c ) of the stabilized loess increased linearly with the decrease in the void ratio. A power function equation was proposed to assess the comprehensive influences of the factors like the lime content, porosity and curing time on cohesion ( c ). Finally, the Mohr-Coulomb failure envelopes were drawn based on the triaxial test for 47 specimens with various curing time and confining pressure, and the shear strength parameters obtained by the proposed equation were also compared with the experimental results.

Keywords: lime stabilization; loess soil; Mohr-Coulomb failure envelopes; porosity; curing time; lime content (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2071-1050/11/19/5397/pdf (application/pdf)
https://www.mdpi.com/2071-1050/11/19/5397/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:11:y:2019:i:19:p:5397-:d:272013

Access Statistics for this article

Sustainability is currently edited by Ms. Alexandra Wu

More articles in Sustainability from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().