Cementation effect on various in-situ tests

M. J. Lee, Y. M. Choi, Y. H. Chae, Woojin Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this study, both laboratory and field tests are performed for evaluating the cementation effect on various in-situ tests. A series of calibration chamber test using artificially cemented specimen is conducted for estimate the effect of cementation on CPT, DMT and bender element tests. And the results of SPTs, CPTs and SPS tests on naturally cemented coastal sediment are also analyzed. Calibration chamber tests show that the small strain shear modulus (G max) is more sensitive to the cementation than the measurements by CPT and DMT because the cementation effect is not fully reflected in the CPT and DMT results due to the damage of cementation induced during the penetration. It is also observed that the dilatometer modulus from DMT is more effective to evaluate the cementation effect than the cone resistance from CPT. The calibration chamber and in-situ tests verify that the G max/q c-q c1 and (G max/p a)/N 60-(N 1) 60 relations suggested by Schnaid et al. (2004) are effective to detect the cementation of in-situ sediment. However, the (G max/p a)/N 60-(N 1) 60 relation should be corrected a little for the more exact prediction of cementation level. The observation of in-situ tests on naturally cemented sediment shows the q c/N ratio of Jeju sediments is much higher than that of un-cemented sand on the (q c/p a)/N 60-D 50 relation. It means that SPT is more destructive to cementation bonds than CPT.

Original languageEnglish
Title of host publicationGeotechnical and Geophysical Site Characterization 4 - Proceedings of the 4th International Conference on Site Characterization 4, ISC-4
Pages1693-1700
Number of pages8
Volume2
Publication statusPublished - 2013 Jan 1
Event4th International Conference on Site Characterization, ISC'4 - Pernambuco, Brazil
Duration: 2012 Sep 182012 Sep 21

Other

Other4th International Conference on Site Characterization, ISC'4
CountryBrazil
CityPernambuco
Period12/9/1812/9/21

ASJC Scopus subject areas

  • Geophysics
  • Geotechnical Engineering and Engineering Geology

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  • Cite this

    Lee, M. J., Choi, Y. M., Chae, Y. H., & Lee, W. (2013). Cementation effect on various in-situ tests. In Geotechnical and Geophysical Site Characterization 4 - Proceedings of the 4th International Conference on Site Characterization 4, ISC-4 (Vol. 2, pp. 1693-1700)