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Design and fabrication of a large-scale oedometer

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Abstract

The most common apparatus used to investigate the load-deformation parameters of homogeneous fine-grained soils is a Casagrande-type oedometer. A typical Casagrande oedometer cell has an internal diameter of 76 mm and a height of 19 mm. However, the dimensions of this kind of apparatus do not meet the requirements of some civil engineering applications like studying load-deformation characteristics of specimens with large-diameter particles such as granular materials or municipal solid waste materials. Therefore, it is decided to design and develop a large-scale oedometer with an internal diameter of 490 mm. The new apparatus provides the possibility to evaluate the load-deformation characteristics of soil specimens with different diameter to height ratios. The designed apparatus is able to measure the coefficient of lateral earth pressure at rest. The details and capabilities of the developed oedometer are provided and discussed. To study the performance and efficiency, a number of consolidation tests were performed on Firoozkoh No. 161 sand using the newly developed large scale oedometer made and also the 50 mm diameter Casagrande oedometer. Benchmark test results show that measured consolidation parameters by large scale oedometer are comparable to values measured by Casagrande type oedometer.

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Authors and Affiliations

  1. School of Civil Engineering, Iran University of Science and Technology (IUST), Narmak, Tehran, 16846-13114, Iran

    Maryam Mokhtari, Nader Shariatmadari, Ali Akbar Heshmati R & Hossein Salehzadeh

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  1. Maryam Mokhtari
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  2. Nader Shariatmadari
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  3. Ali Akbar Heshmati R
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  4. Hossein Salehzadeh
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Correspondence to Maryam Mokhtari.

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Mokhtari, M., Shariatmadari, N., Heshmati R, A.A. et al. Design and fabrication of a large-scale oedometer. J. Cent. South Univ. 22, 931–936 (2015). https://doi.org/10.1007/s11771-015-2603-x

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  • DOI: https://doi.org/10.1007/s11771-015-2603-x

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