Comparisons of one-dimensional consolidation characteristics of clays by using two different specimen sizes
Conference proceedings article
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Author list: Kongkitkul W., Kongwisawamitr K., Suwanwattana V., Thaweeprasart V., Sukkarak R.
Publisher: American Society of Civil Engineers (ASCE)
Publication year: 2014
Issue number: 236 GSP
Start page: 333
End page: 342
Number of pages: 10
ISBN: 9780784413388
ISSN: 0895-0563
eISSN: 0895-0563
Languages: English-Great Britain (EN-GB)
Abstract
One-dimensional consolidation properties are important for prediction of time-dependent settlement of soft clay deposits. Soft clay samples are usually retrieved by the standard thin-wall sampler having a diameter of 3 in. (75 mm). Due to urgency of soil exploration and lack of this standard thin-wall sampler, some samples are collected by smaller thin-wall samplers and, therefore, cannot be accommodated by the standard consolidation ring. This research studies the effects of specimen size on consolidation properties of soft Bangkok clays by focusing on a comparison of test results between the two different sizes which are: (1) d60 (60 mm in diameter and 20 mm in height that meets the ASTM D2435); and (2) d35 (35 mm in diameter and 20 mm in height; newly developed in this study). Parameters which have been compared are: (1) coefficient of consolidation, cv; (2) compression index, Cc; (3) swelling index, Cs; and, (4) preconsolidation stress, s'pc. From the test results, the difference in specimen size insignificantly affected all parameters studied. ฉ 2014 American Society of Civil Engineers.
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