Abstract
Cement-mixed gravel is often used for important soil structure allowing a limited amount of deformation. However, an undisturbed core of cement-mixed gravel recovered from the backfill of the newly constructed bridge abutment showed a variability of strength characteristic. This was mainly attributed to the uneven distribution of cement slurry in the gravel, but this did not become a critical problem because the horizontally arranged geogrid reinforcements prevents weak zone from forming a failure plane. Further, the reinforcements are expected to enhance the extension strength of the cement-mixed gravel. In this study, therefore, a series of bending tests were performed, and the effects of geogrid reinforcement on the bending deformation characteristic of cement-mixed gravel were evaluated.
