Criteria of Acceptance for Constant Rate of Strain Consolidation Test for Tropical Cohesive Soil View Full Text


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Article Info

DATE

2016-04-21

AUTHORS

Khairul Anuar Kassim, Ahmad Safuan A. Rashid, Ahmad Beng Hong Kueh, Chong Siaw Yah, Lam Chee Siang

ABSTRACT

In this study, the rapid consolidation equipment (RACE) was developed as an alternative device to the conventional consolidation test using Oedometer, consuming merely a few hours for the whole precedure to determine the consolidation characteristics of cohesive soil. RACE operates based on the constant rate of strain (CRS) consolidation theory, which is a continuous loading method of testing, requiring a good estimation of the loading rate such that it is ideal for the achievement of steady state condition during testing. The steady state condition is achieved when the cv values from drained and undrained face of CRS converged with the cv from Oedometer test. A slightly modification has been made on the normal constant rate of strain (CRS) test by proposing a direct back pressure system to the specimen using a tube to saturate the soil sample. This research has produced a set of criteria for determining the suitable rate for the rapid consolidation test based on the ratio of normalized strain rate, β, and proposed a new coefficient in terms of a ratio of β to clay fraction (CF), as a part of new criteria for testing a fine soil. Four types of sample were tested with different rates of strain using the RACE and their results were compared with those conducted using the Oedometer on the same soil type, from which fairly good agreements were evident in many specimens. It was found from the study that the minimum value of normalized strain rate, β, for the CRS test is 0.005 and for the ua/σv ratio is suggested as 0.01. Also, the maximum β/CF for soils with clay friction lower and higher than 50 % are 0.008 and 0.001, respectively. The minimum β/CF value for both conditions is 0.0001. More... »

PAGES

931-947

References to SciGraph publications

  • 2014-10-01. Development of Rapid Consolidation Equipment for Cohesive Soil in GEOTECHNICAL AND GEOLOGICAL ENGINEERING
  • 2011-07-22. Investigation on the Characteristics of Pore Water Flow During CRS Consolidation Test in GEOTECHNICAL AND GEOLOGICAL ENGINEERING
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    URI

    http://scigraph.springernature.com/pub.10.1007/s10706-016-0016-8

    DOI

    http://dx.doi.org/10.1007/s10706-016-0016-8

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    https://app.dimensions.ai/details/publication/pub.1026701132


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