Abstract
Granulated blast furnace slag used for backfilling of quay wall is found to be solidified by several research programs. We now need to know when and how granulated blast furnace slag is solidified. In this paper, we report the change of strength property of actually used granulated furnace slag for backfilling. In the investigation, we found the development of the solidified area with time, and about 70% of the slag layer will be solidified after 18 months from the construction, the relation between SPT-N value and the solidified area. SPT-N value will be a simple index for solidification. Finally we report effect of the solidified slag to the anti-seismic deign of quay wall.
