ABSTRACT
In order to try to reduce the environmental burdens of a mass of waste building materials that partly cause the dominant global environmental problems, concept of environment-conscious materials (ecomaterials) design of composite building materials, components, and/or elements is proposed, taking in advance into account of the easiness of demolition and recycling. As part of this concept, hybrid structural systems composed of steel reinforced concrete (RC) columns and new continuous fiber reinforced plastics (FRP) reinforced concrete (FRPRC) beams connected with steel fasteners, recyclable precast reinforced concrete and various effective demolition methods are considered. Lightweight high strength concrete components reinforced with recyclable continuous fiber reinforced rebars using thermally, photochemically and biochemically resolvable resin, not thermosetting epoxy and vinyl ester resin are recommended as ecomaterial design satisfying both the long service lives and the recyclability of building materials, components and elements. As a trial to obtain effective data for establishment of this materials design, some experimental research results by bending test of this lightweight high strength precast concrete component specimens reinforced with both new types of shearing carbon continuous fiber reinforced plastic (CFRP) rebars hardened by thermally resolvable resin and existing type of CFRP main deformed rebars by thermosetting epoxy resin are reported.
