Abstract
A new technology has been introduced to recycle glass bottles into granular materials to be used as geo-materials. One of these granular materials has diameters in the range of 5 to 10 mm. In order to use of this material as backfill material of underground pipes, the validity of use of this material against earthquake-induced uplift of underground pipes, compaction technique on this material, and deformation characteristics of this material under cyclic loading was studied. A series of centrifugal model tests revealed that this material would not liquefy during earthquakes since this material has a high permeability. A series of compaction tests using large scale mold revealed that insertion of geogrids on the compaction of this material is effective. One-dimensional cyclic loading tests and cyclic triaxial tests revealed that residual strain of this material under cyclic loading is about 0.2%. These experimental results ensured that this material can be used as a backfill material of underground pipes for preventing them from earthquake-induced uplift and for preventing the settlement of ground surface.
