期刊
INTERNATIONAL JOURNAL OF GEO-ENGINEERING
卷 9, 期 1, 页码 -出版社
SPRINGER HEIDELBERG
DOI: 10.1186/s40703-018-0087-x
关键词
clay-sand mixtures; Internal friction angle; Angle of repose; Shear strength
资金
- National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning [NRF-2016R1C1B2013478]
- National Research Foundation of Korea [2016R1C1B2013478] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
This paper investigates the effect of clay content on the shear strength of clay-sand mixtures. Bentonite and Jumunjin sand were mixed to prepare clay-sand mixtures with varying clay contents of 5, 10, 15, 20, 25 and 30%. The shear strength of clay-sand mixture was measured using direct shear tests and angle of repose tests in dry condition. The angle of repose of the clay-sand mixture was measured to be greater than that of pure sand for the studied range of clay contents. Likewise, the internal friction angle of the clay-sand mixture was measured to be higher than that of pure sand, reaching a peak at the clay content of 10%. Theoretically, the behavior of the clay-sand mixtures was to be governed by large size particles at clay contents smaller than 23.5%, which agrees well with the visual inspection on the mixtures. At clay content of 25.1% or greater, where the contribution of large particle was theoretically assumed to be none, the results from the angle of repose tests were significantly scattered, indicating that the clay started playing a key role in the behavior of mixtures.
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