Many studies have been conducted recently on barrier design for disposal fills in the sea.One important point in designing a barrier is to minimiza barrier breakage in the event　of serious deformation of the revetments. Cement treated clay is a promising sealing　material for disposal fills due to its low permeability, but because it is also a brittle　material, it cannot follow revetment deformation.

Addition of tire chips to cement treated clay have been thought to offer an effective means　of improving the ductility of cement treated clay, thereby enabling use in structures where　deformation is anticipated. A series of studies on the characteristics of cement treated　clay with added tire chips has been conducted with a Micro-focus X-ray CT scanner.

Further information could be obtained in our paper listed below.

Kikuchi, Y., Nagatome, T., Mitarai, Y. and Otani, J., "Failure Properties of cement treated　clay with added tire ships using X-ray CT Scanner," Recent Developments of Geotechnical　Engineering in Soft Ground (Proc. of 2nd China-Japan Geotechnical Symposium), pp.105-112,　Chinese Institution of Soil Mechanics and Geotechnical Engineering & The Japanese　Geotechnical Society, Tangji University Press, 2005.