Effect of Specimens' Height to Diameter Ratio on Unconfined Compressive Strength of Cohesive Soil

• Autorzy: Gebresamuel Haile Tsegay , Melese Damtew Tsige , Boru Yada Tesfaye , Legese Alemu Mosisa

Identyfikatory

DOI

10.2478/sgem-2023-0001

• Języki publikacji: EN

Abstrakty

EN

The undrained shear strength (Su) and cohesion (Cu) of cohesive soils are frequently determined using an unconfined compression test. However, the test results are heavily dependent on specimen size. This causes uncertainty in geotechnical analyses, constitutive models, and designs by overestimating or underestimating the shear strength of cohesive soils. Therefore, the study aims to assess the effect of the height-to-diameter ratio on the unconfined compressive strength (UCS) of cohesive soil. The soil specimen was tested on a compacted cylindrical specimen at the maximum dry density and optimum moisture content with a height to diameter (H/D) ratio of 1–3 for 38, 50, and 100 mm specimen diameters. Disturbed sample specimens were considered for the laboratory program. Accordingly, the standard Proctor compaction test determines soil classification and compaction characteristics. The unconfined compression test was performed for undisturbed and compacted remolded states of various diameters of cohesive soil specimens to investigate the strength variation with the specimen variation in H/D ratio. The laboratory test results revealed that cohesive soil’s unconfined compression strength value drops rapidly with height-to-diameter ratios and the soil specimens’ diameter increases. However, the UCS value was stable at H/D ratio from 1.75 to 2.25. As the specimens’ diameter and H/D ratio increased, the peak UCS value axial strain decreased. Similarly, the gap between the axial strains of peak UCS value for the smallest and the most significant H/D ratio decreased with increase in the specimens’ diameter.

Słowa kluczowe

EN

height to diameter ratio; unconfined compression strength; UCS scale effect

• Wydawca: De Gruyter
• Czasopismo: Studia Geotechnica et Mechanica
• Rocznik: 2023
• Tom: Vol. 45, nr 2
• Strony: 112--132
• Opis fizyczny: Bibliogr. 22 poz., rys., tab.

Twórcy

autor

Gebresamuel Haile Tsegay

• Faculty of Civil and Environmental Engineering, Jimma Institute of Technology, Po Box 378, Jimma 47, Ethiopia

autor

Melese Damtew Tsige

• Faculty of Civil and Environmental Engineering, Jimma Institute of Technology, Po Box 378, Jimma 47, Ethiopia

autor

Boru Yada Tesfaye

• Faculty of Civil Engineering, Wroclaw University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wroclaw, Poland
• Faculty of Civil and Environmental Engineering, Jimma Institute of Technology, Po Box 378, Jimma 47, Ethiopia

autor

Legese Alemu Mosisa

• Faculty of Civil and Environmental Engineering, Jimma Institute of Technology, Po Box 378, Jimma 47, Ethiopia
• Faculty of Civil Engineering, Wroclaw University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wroclaw, Poland

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).