Experimental Study of Black Cotton Soil Stabilization with Natural Lime and Pozzolans in Pavement Subgrade Construction

Yin, Z.; Lekalpure, Raymond Leiren; Ndiema, Kevin Maraka

doi:10.3390/coatings12010103

Cited by 11 publications

(6 citation statements)

References 21 publications

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“…Therefore, increasing the optimal soil moisture in samples stabilized with lime occurs due to the hydration and pozzolanic reaction between soil and lime, as well as the hydrophilicity of lime [18]. Additionally, the drop in density is associated to the replacement of particles [64]. According to the results, adding lime to clay soil increases the UCS and CBR of the soil, which was in line with the results of other studies [62,65].…”

Section: Discussionsupporting

confidence: 88%

“…It should be noted that the short-term strength of the soil stabilized with lime is due to the cation exchange reaction and the long-term strength is due to the pozzolanic reaction [67]. Yin et al [64] also mentioned that increasing CBR values are related to cations and the pozzolanic reaction between soil and lime. In addition, previous studies indicated that the pozzolans have no cementing value unless mixed with lime in the presence of water [54,68].…”

Section: Discussionmentioning

confidence: 99%

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Forest Road Subgrade Improvement by Lime and Sodium Nanoalginate Used as Stabilizers for Clay Soils

Mousavi

Abdi

Borz

2023

Forests

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Fine-grained soils cause problems for forest road construction and often require improvements of their mechanical properties. One of the methods of improving mechanical properties of clay soils is soil stabilization. In this study, the effect of a conventional (lime) and a non-conventional (sodium nanoalginate) stabilizer on improving the characteristics of a high plasticity forest soil was compared. Atterberg limits including liquid limit, plastic limit and plasticity index, standard Proctor, UCS (Unconfined Compression Strength) and CBR (California Bearing Ratio) tests were performed on control (untreated) and soil samples treated with different doses (3%, 5% and 7%) of lime and sodium nanoalginate, according to the standard procedures. Moreover, to evaluate the effect of curing time, additional tests were performed on the soil samples treated with 3% lime and 3% sodium nanoalginate at 7, 14 and 28 days after the treatment. The results indicated that adding sodium nanoalginate and lime to the forest soil improves the Atterberg limits. Additionally, adding sodium nanoalginate to the forest soil increases the maximum dry density (γdmax) and decreases the optimum moisture content (OMC), whereas adding lime to the forest soil reduces the maximum dry density and increases the optimum moisture content. Adding sodium nanoalginate and lime in different doses (3%, 5% and 7%) increased UCS and CBR as the main indices of soil strength. The increment range of UCS for the soil stabilized with sodium nanoalginate and lime was 42.59%–160.14% and 31.34%–56.65%, respectively, and the range of CBR improvement for soil stabilized with sodium nanoalginate and lime was 28.72%–122.97% and 13.83%–45.59%, respectively. Increasing the curing time improved the mechanical properties of the forest soil in the samples treated with both stabilizers, but sodium nanoalginate performed better in soil stabilization.

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Section: Discussionsupporting

confidence: 88%

Section: Discussionmentioning

confidence: 99%

Forest Road Subgrade Improvement by Lime and Sodium Nanoalginate Used as Stabilizers for Clay Soils

Mousavi

Abdi

Borz

2023

Forests

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“…Therefore, a soil sample was mixed with FA at percentages of 5%, 10%, 15%, and 20%, and rice husk ash at percentages of 10%, 15%, 20%, and 25%. [21] analyzed technical properties of BCS stabilized with natural lime, Volcanic Ash (VA), and a mixture of the two. The results showed that the engineering properties of BCS were greatly improved by the addition of VA and lime.…”

Section: Literature Of Reviewmentioning

confidence: 99%

A Review of Soil Improvement in Problematic Black Cotton Soil by Using Dry Kota Stone Slurry and Fly Ash

Pratap,

Kumar,

Yadav

2024

AiBi Revista de Investigación, Administración e Ingeniería

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Black Cotton Soil (BCS) is particularly rapid-expanding and swelling when it meets water. This trait of soil results in extremely low soil strength and other attributes. Soil stabilization by various stabilizers is required to enhance its characteristics. Stabilization is a technique used to improve the soil's structural integrity. Soil stabilization raises the subgrade's load-bearing capacity, allowing it to better support the pavement and foundation. It is accomplished by increasing the soil's shear strength and regulating its shrink-swell qualities. Expansive soils could have their engineering qualities enhanced via several different means. The problematic soils are either excavated and replaced with excellent, higher-quality material or treated with an additive. This paper analyzes soil improvement in problematic BCS using dry Kota Stone Slurry (KSS) and Fly Ash (FA). In thermal power plants, FA is produced as a byproduct of burning coal. It's made up of dust and ash that are swept up in the exhaust when fuel is burned. The findings highlight its potential to address soil-related issues, enhance agricultural productivity, and contribute to sustainable land utilization practices.

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“…Although many studies have been reported on soil stabilization with traditional binders, such as cement or slag, the literature is not sufficiently includes reports on use of blended binders. The existing studies report, the use of polypropylene and silica fume blended combination for improving strength characteristics of black cotton soil [23], the mixtures of natural lime and volcanic ash for black cotton soil stabilization [24] and or the use of coal bottom ash for stabilization of expansive soils using stabilizing agent CBA [25].…”

Section: Sonic Testsmentioning

confidence: 99%

Impact of Strength-Enhancing Admixtures on Stabilization of Expansive Soil by Addition of Alternative Binders

Lindh

Lemenkova

2022

Civil and Environmental Engineering

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In this study, the stabilization process is introduced to a clayey expansive soil collected in southern Sweden. The tests examined strength parameters of expansive soil stabilized by different binders using combination of both traditional binders (cement and lime) and alternative materials (slag Merit 5000, fly ash from SCA Lilla Edet and fly ash from coal combustion, ISO certified). The practical goal was to find a binder mixture that is optimized for soil stabilization with respect to technical properties of stabilizing agent as an inert ballast material. The strength of soil stabilized by various binders was examined by velocity of the P-waves propagating through specimens. The results show that introducing slag Merit 5000 as an admixture to cement and lime is an effective approach in enhancing strength properties in weak soil, which increases bearing capacity of soil for planned construction works. The results also shown that a mixture of lime and bio ash yields a better effect in the stabilization of a clay. Soil stabilized with cement, cement/slag and lime/slag becomes resistant to freeze-thaw cycles, which is crucial for construction of roads and building foundations.

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Experimental Study of Black Cotton Soil Stabilization with Natural Lime and Pozzolans in Pavement Subgrade Construction

Cited by 11 publications

References 21 publications

Forest Road Subgrade Improvement by Lime and Sodium Nanoalginate Used as Stabilizers for Clay Soils

Forest Road Subgrade Improvement by Lime and Sodium Nanoalginate Used as Stabilizers for Clay Soils

A Review of Soil Improvement in Problematic Black Cotton Soil by Using Dry Kota Stone Slurry and Fly Ash

Impact of Strength-Enhancing Admixtures on Stabilization of Expansive Soil by Addition of Alternative Binders

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