Mechanical and Structural Correlation of Lateritic Soil Road Base Stabilized with Cement and Selected Biochars

Otieno, Mike; Kabubo, Charles; Gariy, Zachary Abiero

doi:10.48084/etasr.5973

Cited by 2 publications

(1 citation statement)

References 47 publications

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“…Clayey soils exhibit high sensitivity to variations in moisture content but are also subject to adverse impacts of environmental stressors, including climatic conditions, longterm static loading, and dynamic impacts. Therefore, stabilization of such soils, when used as road subgrade, requires remedial treatment to increase their strength properties and decrease permeability [1][2][3][4][5][6][7][8][9][10]. The use of quicklime (QL) for soil stabilization is a widely recognized technique [11].…”

Section: Introductionmentioning

confidence: 99%

Quicklime-stabilized Tuff and Clayey Soils for Highway A3 Construction in Northern Tunisia

Ghazouani

2024

Eng. Technol. Appl. Sci. Res.

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This study presents a comprehensive examination of the effects of quicklime (QL) addition on the stabilization of two distinct clayey soils with high (CH) and low plasticity (CL-tuff). The results showed that incorporating QL into the soils substantially improves their stabilization characteristics. Specifically, the addition of QL results in a notable decrease in the final water content of both soils, as shown by a reduction from 23.04 to 19.06% in CH and from 18.07 to 17.1% in CL-tuff at 4% QL addition. Furthermore, this study reveals a transformation in the plasticity properties of soils. Liquid Limit (LL) and Plasticity Index (PI) were reduced, with CH-tuff exhibiting a significant decrease in PI from 48 to 12 and an increase in Plastic Limit (PL) from 21.8 to 55 at 4% QL. CL-tuff also showed reduced plasticity, with PI decreasing to 8.33 at 4% QL. Additionally, the Immediate Bearing Index (IBI) was improved for both soil samples, indicating improved load-bearing capacities. For CH samples, IBI improved from 6.37 to 11.99 at 4% QL addition, while for CL-tuff, it increased dramatically from 4.5 to 23.6 for the same QL percentage. The findings underscore the effectiveness of QL in improving soil properties crucial for chemical stabilization, providing evidence that QL addition can be a key technique in soil stabilization, especially for soils with high plasticity or those requiring increased bearing strength.

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Section: Introductionmentioning

confidence: 99%

Quicklime-stabilized Tuff and Clayey Soils for Highway A3 Construction in Northern Tunisia

Ghazouani

2024

Eng. Technol. Appl. Sci. Res.

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The Effect of Waste Marble Dust and Corncob Ash on the Engineering and Micro-Structural Properties of Expansive Soil for Use in Road Subgrades

Wongbae,

Kabubo,

Owayo

2024

Eng. Technol. Appl. Sci. Res.

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This research investigated the effect of Waste Marble Dust (WMD) and Corncob Ash (CCA) on expansive soil's engineering and microstructural properties. Various laboratory experiments were performed on the natural soil to ascertain its characteristics. The corncobs underwent pre-water treatment for fourteen days to remove excess potassium and increase their silica content, resulting in a rise in the silica level from 0% to 50%. At first, only WMD was added to the soil in increments of 5% to 30% using compaction and California bearing tests. The optimum dosage of 15% WMD addition yielded the best result. CCA was then incorporated by the weight of the soil from 2% to 10% in increments of 2% to the first optimum (15% WMD) to obtain the overall optimum for the study (15% WMD and 8% CCA). Stabilization of the natural soil using both materials led to the modification and solidification of the soil mass, evident by the rise in California bearing ratio values from 1.68% to 15.53% and unconfined compressive strength from 41.33 kN/m2 to 174.68 kN/m2. There was also a decrease in the soil's free swell from 120% to 15% as well as reductions in the liquid limits from 56.23% to 36.01% and in the plasticity index from 29.74% to 8.72%, respectively. The microstructural images showed the formation of cementitious compounds in the form of calcium silicate hydrate and calcium aluminate hydrate gels. The findings indicate that using WMD and CCA as a unit has great potential in enhancing engineering properties, like strength parameters and the swell potential of expansive soils.

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Mechanical and Structural Correlation of Lateritic Soil Road Base Stabilized with Cement and Selected Biochars

Cited by 2 publications

References 47 publications

Quicklime-stabilized Tuff and Clayey Soils for Highway A3 Construction in Northern Tunisia

Quicklime-stabilized Tuff and Clayey Soils for Highway A3 Construction in Northern Tunisia

The Effect of Waste Marble Dust and Corncob Ash on the Engineering and Micro-Structural Properties of Expansive Soil for Use in Road Subgrades

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