Characterization of Shear Strength and Interface Friction of Organic Soil

Hamed, Majid; Sidik, Waleed; Çanakçı, Hanifi; Çeli̇k, Fatih; Georgees, Romel N.

doi:10.4028/www.scientific.net/kem.857.203

Cited by 3 publications

(1 citation statement)

References 20 publications

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“…When any civil engineering application comes into contact with soils, shear strength is frequently important. The shear resistance is an important consideration throughout the building of standing building equipment and at the finish of the construction process while supporting the building [26]. A geopolymer with a molarity of 14 M was employed, and the fly,ash was blended with an alkaline at a 1:1 (fly ash: alkaline) ratio.…”

Section: Direct Shear Testmentioning

confidence: 99%

Geotechnical Behaviour of Gypseous Soil Treated by Geopolymer Additives

Mahmood,

Hussein Hamed,

Ibrahim

2023

DJES

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Gypseous soil is well-known for its numerous engineering problems. When this soil is exposed to water, the gypsum in the soil dissolves, causing the buildings built on it to collapse; so, treating gypseous soil is important for improving its engineering characteristics. The present paper focuses on studying the effect of adding geopolymer on mechanical characteristics of gypseous soil. This study presents the results obtained from a series of experimental tests, including direct shear, consolidation, and collapsibility tests. Tests were conducted on samples of gypseous soil taken from depth 1.5 meters below ground level with gypsum content of 41%. The geopolymer was used in three different molarities for the collapse test (10M, 12M, and 14M) and a 14 molarity only for the shear and consolidation tests, where equal proportions of fly ash were combined with an alkaline activator that was composed of sodium hydroxide and sodium silicate. The binder (fly ash + alkaline) to the soil was added to the treated samples during mixing at a rate of 20% by weight. The findings showed that treating the soil with geopolymer leads to a notable enhancement in the angle of internal friction of the soil particles from (37 to 42) degrees. as well as a reduction in the soil compressibility and a reduction in the susceptibility of the soil to collapse, with an improvement degree of 64% when using a geopolymer with a molarity of 14 M. This improvement was achieved by using a geopolymer with a higher concentration of NaOH. The best results were achieved when a geopolymer with a molarity of 14 was used, which is the ideal ratio.

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Section: Direct Shear Testmentioning

confidence: 99%

Geotechnical Behaviour of Gypseous Soil Treated by Geopolymer Additives

Mahmood,

Hussein Hamed,

Ibrahim

2023

DJES

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Triaxial Compression Behavior of Sandy Soil Polluted with Crude Oil

Ghaffoori

Arbili

Çanakçı

et al. 2022

Geotechnical Engineering and Sustainable Construction

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Assessing Interface Friction in Sand Treated Clayey Soil-Concrete Composites

Nadhir Ali Alshareef,

Hamed

2024

IOP Conf. Ser.: Earth Environ. Sci.

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Understanding the fundamental mechanisms governing friction mobilization at the interface between construction materials and soil is crucial for the design and performance assessment of conventional underground structures like footing, piles, and anchors. This research investigates the interface friction behavior between concrete construction materials and clayey soil, treated with varying sand content of (0%, 20%, 30%, and 40%). Additionally, two levels of water content were examined for each sand content: 8.5% and 17%. The friction angle generated between the solid surface and soil was calculated through experimental tests conducted by using shear test, with three different normal stresses that have been applied at a rate of 0.25 mm/min. The results indicate showed that created friction resistance between the clayey soil and concrete construction material is influenced by both sand and water contents. The increase in the percentages of the interface friction angle when the soil is treated with sand at a water content of 8.5% varied. It was approximately 4, 11, and 15% for sand contents of 20, 30, and 40%, respectively. Similarly, when the clayey soil was treated with the same sand dosages at a water content of 17%, the percentage increase in the interface friction angle differed. It amounted to 5%, 13%, and 27% for sand contents of 20, 30, and 40%, respectively.

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Characterization of Shear Strength and Interface Friction of Organic Soil

Cited by 3 publications

References 20 publications

Geotechnical Behaviour of Gypseous Soil Treated by Geopolymer Additives

Geotechnical Behaviour of Gypseous Soil Treated by Geopolymer Additives

Triaxial Compression Behavior of Sandy Soil Polluted with Crude Oil

Assessing Interface Friction in Sand Treated Clayey Soil-Concrete Composites

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