EFFECTS OF MIXING RATIO ON UNCONFINED COMPRESSIVE BEHAVIOR OF FIBER REINFORCED MIXTURE OF SOIL AND STEELMAKING SLAG

Abstract

 Fiber-Reinforced Mixture of Dredged soil and Steelmaking slag (FRMDS) has been developed as, for example, an impervious material used to fill waste reclamation sites in Japanese coastal areas. Recent studies have revealed that the mixed fiber resulted in higher deformability of FRMDS.
 The principal goal of this study is to reveal deformation characteristics of FRMDS and possible factors to influence them. The authors conducted the unconfined compression tests (UCT) of FRMDS to evaluate effects of mixing ratio between fiber and steelmaking slag on the deformation characteristics. The results of stress-strain behavior and visual observation during UCT indicates a failure mode of FRMDS can be categorized into four different types depending on the mixing ratio and curing period; I. Brittle Failure Type, II. Stable Failure Type, III. Ductile Failure Type and IV. Strain Hardening Type. In other words, the deformation characteristics of FRMDS are expected to be predicted by properly controlling the mixing ratio and curing period. The paper describes a schematic diagram of the failure mode partitioned based on the mixing ratio.