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

Y. Nakata, K. Ogawa, Hirokazu Akaki, 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
    Volume2
    ISBN (Print)9781138027077
    Publication statusPublished - 2015
    EventInternational Symposium on Geomechanics from Micro to Macro, IS-Cambridge 2014 - Cambridge
    Duration: 2014 Sep 12014 Sep 3

    Other

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

    Fingerprint

    sands
    scanning
    sand
    glass
    liquids
    volume change
    liquid
    x rays
    gels
    mechanical properties
    liquefaction
    countermeasures
    mechanical property
    gel
    material
    density distribution
    Japan
    earthquakes
    silicon dioxide
    acids

    ASJC Scopus subject areas

    • Geophysics

    Cite this

    Nakata, Y., Ogawa, K., Akaki, 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 (Vol. 2, pp. 1143-1146). Taylor and Francis - Balkema.

    Micro-focus X-ray CT scanning of chemically improved sand. / Nakata, Y.; Ogawa, K.; Akaki, Hirokazu; Kawamura, J.; Watanabe, Y.

    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, 2015. p. 1143-1146.

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

    Nakata, Y, Ogawa, K, Akaki, 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. vol. 2, Taylor and Francis - Balkema, pp. 1143-1146, International Symposium on Geomechanics from Micro to Macro, IS-Cambridge 2014, Cambridge, 14/9/1.
    Nakata Y, Ogawa K, Akaki H, Kawamura J, Watanabe Y. 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. Vol. 2. Taylor and Francis - Balkema. 2015. p. 1143-1146
    Nakata, Y. ; Ogawa, K. ; Akaki, Hirokazu ; Kawamura, J. ; Watanabe, Y. / Micro-focus X-ray CT scanning of chemically improved sand. 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, 2015. pp. 1143-1146
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