Analysis of Strength Development and Soil–Water Characteristics of Rice Husk Ash–Lime Stabilized Soft Soil

Jiang, Xunli; Huang, Zhiyi; Ma, Fuquan; Luo, Xue

doi:10.3390/ma12233873

Cited by 31 publications

(17 citation statements)

References 26 publications

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“…Xunli Jiang and Phanikumar observed a similar trend while using RHA mixed with other agents. The reduction rate differs depending on the clay content and the stabilizer type [ 4 , 27 ].…”

Section: Resultsmentioning

confidence: 99%

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Evaluation of the Effects of Cement and Lime with Rice Husk Ash as an Additive on Strength Behavior of Coastal Soil

et al. 2021

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Coastal accretion and erosion are unavoidable processes as some coastal sediments undergo modification and stabilization. This study was conducted to investigate the geotechnical behavior of soil collected from Bagan Lalang coast and treated with lime, cement, and rice husk ash (RHA) to design a low-cost alternative mixture with environmentally friendly characteristics. Laboratory tests were carried out to analyze the physical properties of the soil (Atterberg limits and compaction properties), together with mechanical characteristics (direct shear and unconfined compressive strength (UCS) tests) to determine the effect of different ratios of stabilizer/pozzolan on the coastal soil and the optimum conditions for each mixture. Part of the purpose of this study was also to analyze the shear behavior of the coastal soil and monitor the maximum axial compressive stress that the treated specimens can bear under zero confining pressure. Compared to the natural soil, the soil treated with lime and rice husk ash (LRHA) in the ratio of 1:2 (8% lime content) showed a tremendous increase in shear stress under the normal stress of 200 kPa. The strength parameters such as the cohesion (c) and internal friction angle (ϕ) values showed a significant increase. Cohesion values increased considerably in samples cured for 90 days compared to specimens cured for 7 days with additional LRHA in the ratio of 1:2 (28%).

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“…Xunli Jiang and Phanikumar observed a similar trend while using RHA mixed with other agents. The reduction rate differs depending on the clay content and the stabilizer type [ 4 , 27 ].…”

Section: Resultsmentioning

confidence: 99%

“…A similar pattern was shown in the LRHA mixture. In fact, when the stabilizer content was increased from 4% to 8%, the moisture content and MDD increased dramatically to a peak, demonstrating the optimum moisture content [ 4 ].…”

Section: Resultsmentioning

confidence: 99%

Evaluation of the Effects of Cement and Lime with Rice Husk Ash as an Additive on Strength Behavior of Coastal Soil

et al. 2021

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“…The Frendlund–Xing model is:

where

is the correction factor, defined as

where S is the degree of saturation;

and

are model coefficients. Figure 5 shows the fitting results, and Table 3 [ 48 ] shows the values of the model coefficients.…”

Section: Results Of Laboratory Soil Testsmentioning

confidence: 99%

An Improved Mechanistic-Empirical Creep Model for Unsaturated Soft and Stabilized Soils

2021

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Soft soils are usually treated to mitigate their engineering problems, such as excessive deformation, and stabilization is one of most popular treatments. Although there are many creep models to characterize the deformation behaviors of soil, there still exist demands for a balance between model accuracy and practical application. Therefore, this paper aims at developing a Mechanistic-Empirical creep model (MEC) for unsaturated soft and stabilized soils. The model considers the stress dependence and incorporates moisture sensitivity using matric suction and shear strength parameters. This formulation is intended to predict the soil creep deformation under arbitrary water content and arbitrary stress conditions. The results show that the MEC model is in good agreement with the experimental data with very high R-squared values. In addition, the model is compared with the other classical creep models for unsaturated soils. While the classical creep models require a different set of parameters when the water content is changed, the MEC model only needs one set of parameters for different stress levels and moisture conditions, which provides significant facilitation for implementation. Finally, a finite element simulation analysis of subgrade soil foundation is performed for different loading levels and moisture conditions. The MEC model is utilized to predict the creep behavior of subgrade soils. Under the same load and moisture level, the deformation of soft soil is largest, followed by lime soil and RHA–lime-stabilized soil, respectively.

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“…CSH and CAH), so that they help to the change in the PSD of soil specimens as discussed previously. Moreover, cement addition can help to enhance the microstructure properties of soil specimens, thus make the PSD more uniform and improving the water-holding performance of treated soil specimens (Jiang et al, 2019).…”

Section: Soil-water Retention Behaviormentioning

confidence: 99%

Geotechnical and other characteristics of cement-treated low plasticity clay

Alkiki¹,

Abdulnafaa²,

Aldaood³

2021

S&R

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This research work examines the utilization of cement in order to improve low plasticity clay soil. The soil samples treated with 2, 4 and 6% cement percents and cured for different curing times extended to 90 days. Laboratory investigations include unconfined compression, indirect tensile, gas permeability and microstructural tests, which were conducted on the tested samples. The soil-water retention behavior has been also investigated. The test results showed that the cement addition improved both the compressive and tensile strength properties of soil specimens. These strength properties were also increased with curing times. pH and electrical conductivity values were good indicators for the enhancement in the strengths properties. The results of micro structural tests illustrated that the natural soil specimens contain voids and the open structure. Further, these tests showed the cementation of soil grains and filling the voids among soil grains with cementing compounds. Gas permeability and soil-water retention behavior of soil specimens are strongly related to the variations in the soil structures. Further examination illustrated that in the case of low cement content, the pore size distribution (PSD) and the efficiency of gas permeability are more sensitive to curing times.

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Analysis of Strength Development and Soil–Water Characteristics of Rice Husk Ash–Lime Stabilized Soft Soil

Cited by 31 publications

References 26 publications

Evaluation of the Effects of Cement and Lime with Rice Husk Ash as an Additive on Strength Behavior of Coastal Soil

Evaluation of the Effects of Cement and Lime with Rice Husk Ash as an Additive on Strength Behavior of Coastal Soil

An Improved Mechanistic-Empirical Creep Model for Unsaturated Soft and Stabilized Soils

Geotechnical and other characteristics of cement-treated low plasticity clay

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