Micro-focus X-ray CT scanning of chemically improved sand

Y. Nakata, K. Ogawa, H. Akagi, J. Kawamura, Y. Watanabe

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

Abstract

In order to improve the loose sand mechanical properties as the countermeasures against the earthquake induced liquefaction, a chemical solution, i.e. a liquid glass material solution is frequently employed and injected into the loose sand foundation in Japan. The volume change of a liquid glass material has been observed during the chemical gel reaction of the liquid glass material in the laboratory test. The volume change of liquid glass material is assumed to affect the mechanical properties of the chemically improved sand. In this study, the micro-focus X-ray CT scanning technique has been used to investigate the effect of the volume change of liquid glass material on the density variation of the chemically improved sand specimen. The specimen has been prepared by using a silica sand sample and the neutral-acid liquid glass material. In the X-ray CT scanning of the material, the output value to be measured is the value called GL (Gray Level), which is proportional to the X-ray absorption amount and the density of the tested material. By using this relationship, the density distribution within the specimen has been obtained. The effect of volume change of a liquid glass gel material on the mechanical characteristics of chemically improved sand has been investigated by using the correlation between the GL values and the material densities.

Original languageEnglish
Title of host publicationGeomechanics from Micro to Macro - Proceedings of the TC105 ISSMGE International Symposium on Geomechanics from Micro to Macro, IS-Cambridge 2014
PublisherTaylor and Francis - Balkema
Pages1143-1146
Number of pages4
ISBN (Print)9781138027077
Publication statusPublished - 2015 Jan 1
EventInternational Symposium on Geomechanics from Micro to Macro, IS-Cambridge 2014 - Cambridge, United Kingdom
Duration: 2014 Sep 12014 Sep 3

Publication series

NameGeomechanics from Micro to Macro - Proceedings of the TC105 ISSMGE International Symposium on Geomechanics from Micro to Macro, IS-Cambridge 2014
Volume2

Conference

ConferenceInternational Symposium on Geomechanics from Micro to Macro, IS-Cambridge 2014
CountryUnited Kingdom
CityCambridge
Period14/9/114/9/3

ASJC Scopus subject areas

  • Geophysics

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  • Cite this

    Nakata, Y., Ogawa, K., Akagi, H., Kawamura, J., & Watanabe, Y. (2015). Micro-focus X-ray CT scanning of chemically improved sand. In Geomechanics from Micro to Macro - Proceedings of the TC105 ISSMGE International Symposium on Geomechanics from Micro to Macro, IS-Cambridge 2014 (pp. 1143-1146). (Geomechanics from Micro to Macro - Proceedings of the TC105 ISSMGE International Symposium on Geomechanics from Micro to Macro, IS-Cambridge 2014; Vol. 2). Taylor and Francis - Balkema.