American Society of Civil Engineers

Visualization of Permeability Phenomena in Lightweight Treated Soil Mixed with Air Foam Using Micro-Focus X-Ray CT Scanner

by Y. Kikuchi, (Head of Foundations Division, Port & Airport Research Institute, 3-1-1, Nagase, Yokosuka 239-8026, Japan; E-mail:, T. Nagatome, (Researcher, Geotechnical and Disaster Prevention Technology Group, Toa Research and Development Center, Toa Construction Company Ltd., 1-3 Anzen-cho, Tsurumi-ku, Yokohama 230-0035, Japan; E-mail:, and J. Otani, (Professor, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan E-mail:
Section: Applications of X-Ray Computed Tomography, pp. 1-6, (doi:

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Document type: Conference Proceeding Paper
Part of: GeoCongress 2006: Geotechnical Engineering in the Information Technology Age
Abstract: Lightweight treated soil mixed with air foam has been proposed for application in waterfront construction. The permeability of the material is an important characteristic governing changes in its mechanical properties and the possibility of ground water pollution. In this paper, permeability tests were conducted and the permeability mechanism was observed using a micro-focus X-ray CT scanner. We concluded that the permeability of lightweight treated soil mixed with air foam is governed by the permeability of the mixture of clay and cement, the presence of impermeable air, and the possibility that channels facilitating water flow may form in the LWS.

ASCE Subject Headings:
Imaging techniques
Soil mixing
Soil permeability
Waterfront structures
X rays