APPLICATION OF GRANULATED BLAST FURNACE SLAG TO REDUCE THE SEISMIC EARTH PRESSURE
Granulated Blast Furnace Slag (GBFS) is produced in the manufacture process of pig-iron and shows a similar particle formation as a natural sand. GBFS also shows light weight, high shear strength, well permeability and especially a latent hydraulic property by which GBFS hardens like a rock. When GBFS is used as a backfill material placed behind such as quay wall, the increase of shear strength induced by the hardening is presumed to reduce the earth pressure and consequently the construction
... the construction cost of such as harbor structures decreases. In this study, the model wall tests were carried out on GBFS, in which the resultant earth pressure, a wall friction and the earth pressure distribution at the wall surface were measured, and the test results were compared with those of Toyoura standard sand. In the tests, the relative density was set as Dr=25, 55 and 70% and the wall was tilted from vertical to the active earth pressure side and followed by the passive side. The maximum horizontal displacement at the top of the wall was set as ±2mm. By these model tests, it is clarified that the resultant earth pressure obtained by using GBFS is smaller than Toyoura sand, especially in the active-earth pressure side.