Abstract
Granulated Blast Furnace Slag (GBFS) is expected to be a useful earthwork material because GBFS increases in shear strength due to its hydration reaction under the natural environment. Authors have already clarified the physical and mechanical properties in the process of hardening by laboratory tests and in-situ case studies. When the earth structures consisted of GBFS which was hardened by a long-term curing are collapsed by external factors such as earthquake, the shear strength is considered to be recovered by its self-restoration due to generation of hydrates at collapsed boundaries. In this study, the self-restoration characteristics induced by the hydration reaction were investigated by observing the hardening process of GBFS which was taken from the in-situ embankment constructed 11 years ago. In addition, a method to estimate the increase of shear strength of GBFS with time was proposed.
