Experimental Investigation on Shear Strength Parameters of Lime Stabilized Loess
| Autor: | Xiushao Zhao, Jian Guo, Liang Jia, Yanbin Jiang, Sin Mei Lim, Yong Fu, Zhidong Zhou |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
porosity lime content Geography Planning and Development 0211 other engineering and technologies TJ807-830 02 engineering and technology Management Monitoring Policy and Law engineering.material Triaxial shear test TD194-195 Renewable energy sources curing time Loess 021105 building & construction Cohesion (geology) mohr-coulomb failure envelopes Geotechnical engineering GE1-350 loess soil Porosity 021101 geological & geomatics engineering Lime Environmental effects of industries and plants Renewable Energy Sustainability and the Environment Subgrade Overburden pressure lime stabilization Environmental sciences Curing time engineering |
| Zdroj: | Sustainability, Vol 11, Iss 19, p 5397 (2019) Sustainability Volume 11 Issue 19 |
| ISSN: | 2071-1050 |
| Popis: | 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 (&phi ) and cohesion (c)), using a series of triaxial tests performed on lime stabilized loess specimens. The experimental results revealed that the friction angle (&phi ) 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. |
| Databáze: | OpenAIRE |
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