Abstract
Recently, researches for ultra-high strength concrete exceeding 200MPa including RPC or DSP composites, which apply special consideration to the selection of granular components and granular mixtures have been carried out. In this study, to enhance mechanical properties of ultra-high strength mortar without special treatment of materials, hot-press compaction was adopted and steel powder was used as aggregate. The influence of pressure of hot-press compaction, water-binder ratio, and using steel powder on the mechanical properties were investigated. Compressive strength was incremented 40 to 60% by using hot-press compaction, and 315 MPa was obtained when steel powder was also used
