Experimental investigation on strength development of lime stabilized loess

Jia, Liang; Guo, Jianchun; Zhou, Zhidong; Fu, Yong; Yao, Kai

doi:10.1039/c9ra01914f

Cited by 13 publications

(6 citation statements)

References 47 publications

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“…The dry density was controlled to be 1.58, 1.48, and 1.38 g/cm 3 for the lime stabilized loess specimens at points C, D, and E. Moreover, the specimens at point D were prepared with three different lime percentages: 10%, 16% and 23% to investigate the effects of lime content on its strength behavior. 14 The molding points for the triaxial compression tests are summarized in Table 3. Combining with the experimental procedure of Consoli et al [34] and the results of the standard compaction test, 5 molding points (A, B, C, D and E) were set in this study.…”

Section: Standard Compaction Testmentioning

confidence: 99%

“…However, these bonds can break down after immersing in water or applying a greater stress, which can result in the collapse and deformation of the structure [4]. Furthermore, it may even lead to serious geotechnical disasters, such as uneven settlement of the foundation, landslides and ground fissures [5][6][7][8], and has thus attracted attention from scientists and engineers worldwide [9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

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Experimental Investigation on Shear Strength Parameters of Lime Stabilized Loess

et al. 2019

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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.

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Section: Standard Compaction Testmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Shear Strength Parameters of Lime Stabilized Loess

et al. 2019

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“…Ni [ 8 ], Xu [ 9 ] and Ge M [ 10 ] compared the changes of loess microstructure before and after permeability test by SEM. Jwa [ 11 ], Jia [ 12 ] analyzed the changes of loess microstructure in tensile and infinite lateral compression tests, respectively. Above results suggested that the structure had an important influence on the mechanical deformation properties of loess [ 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Influence mechanism of structure on shear mechanical deformation characteristics of loess-steel interface

et al. 2022

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The mechanical properties of loess-steel interface are of great significance for understanding the residual strength and deformation of loess. However, the undisturbed loess has significant structural properties, while the remolded loess has weak structural properties. There are few reports on the mechanical properties of loess-steel interface from the structural point of view. This paper focused on the ring shear test between undisturbed loess as well as its remolded loess and steel interface under the same physical mechanics and test conditions (water content, shear rate and vertical pressure), and explored the influence mechanism of structure on the mechanical deformation characteristics of steel-loess interface. The results show that the shear rate has little effect on the residual strength of the undisturbed and remolded loess-steel interface. However, the water content has a significant influence on the residual strength of the loess-steel interface, moreover, the residual internal friction angle is the dominant factor supporting the residual strength of the loess-steel interface. In general, the residual strength of the undisturbed loess-steel interface is greater than that of the remolded loess specimen (for example, the maximum percentage of residual strength difference between undisturbed and remolded loess specimens under the same moisture content is 6.8%), which is because that compared with the mosaic arrangement structure of the remolded loess, the overhead arrangement structure of the undisturbed loess skeleton particles makes the loess particles on the loess-steel interface re-adjust the arrangement direction earlier and reach a stable speed relatively faster. The loess particles with angular angles in the undisturbed loess make the residual internal friction between the particles greater than the smoother particles of the remolded loess (for example, the maximum percentage of residual cohesion difference between undisturbed and remolded loess specimens under the same vertical pressure is 4.29%), and the intact cement between undisturbed loess particles brings stronger cohesion than the remolded loess particles with destroyed cement (for example, the maximum difference percentage of residual cohesion between undisturbed and remolded soil specimens under the same vertical pressure is 33.80%). The test results provide experimental basis for further revealing the influence mechanism of structure, and parameter basis for similar engineering construction.

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“…Some previous research results indicated that the application of stabilizing agent (such as cement or lime) can significantly improve the mechanical properties of soft soils [16][17][18][19]. The addition of lime has been a popular solution for loess stabilization, due to low cost and high technical efficiency in engineering applications [7,12].…”

Section: Introductionmentioning

confidence: 99%

“…With an appropriate proportion of lime and slag used in the soil mixture, the early Table 1. Physical properties of the natural loess [19].…”

Section: Introductionmentioning

confidence: 99%

Evaluation on Strength Properties of Lime–Slag Stabilized Loess as Pavement Base Material

et al. 2019

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This study aimed to investigate the feasibility of using lime–slag stabilized loess as base-course material by assessing its unconfined compressive strength (UCS). Loess stabilized with various mix ratios were compacted and cured to three, five, seven, and 28 days, respectively, for further strength tests. The effects of binder content, lime-to-slag (L/S) ratio, porosity, and curing time on the UCS of stabilized loess were addressed in detail. The test results show that UCS increases with the increase in binder content or curing time, and it gains strength rapidly within the first seven days of curing. At the same binder content, UCS decreases with the decrease in L/S ratio or porosity. Finally, the correlations of UCS with binder content, porosity, and curing time were derived, which exhibited reasonable correlation coefficients R2 (from 0.86 to 0.97).

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Experimental investigation on strength development of lime stabilized loess

Abstract: Lime stabilization has been widely used in pavement subbases and ground improvement, but the investigation of the mechanical properties and the microstructure of lime stabilized loess is still insufficient.

Cited by 13 publications

References 47 publications

Experimental Investigation on Shear Strength Parameters of Lime Stabilized Loess

Experimental Investigation on Shear Strength Parameters of Lime Stabilized Loess

Influence mechanism of structure on shear mechanical deformation characteristics of loess-steel interface

Evaluation on Strength Properties of Lime–Slag Stabilized Loess as Pavement Base Material

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