TY - GEN
T1 - Micro-focus X-ray CT scanning of chemically improved sand
AU - Nakata, Y.
AU - Ogawa, K.
AU - Akagi, H.
AU - Kawamura, J.
AU - Watanabe, Y.
PY - 2015
Y1 - 2015
N2 - 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.
AB - 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.
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U2 - 10.1201/b17395-205
DO - 10.1201/b17395-205
M3 - Conference contribution
AN - SCOPUS:84907302859
SN - 9781138027077
T3 - Geomechanics from Micro to Macro - Proceedings of the TC105 ISSMGE International Symposium on Geomechanics from Micro to Macro, IS-Cambridge 2014
SP - 1143
EP - 1146
BT - Geomechanics from Micro to Macro - Proceedings of the TC105 ISSMGE International Symposium on Geomechanics from Micro to Macro, IS-Cambridge 2014
PB - Taylor and Francis - Balkema
T2 - International Symposium on Geomechanics from Micro to Macro, IS-Cambridge 2014
Y2 - 1 September 2014 through 3 September 2014
ER -