PRESTRESSED CONCRETE

• Main Authors: TADA Shuji, AHAGON Masaki, FUKAZAWA Hiroki, HOSOYA Jin, ARIGA Shunji, NISHIZONO Hiromi
• Format: Patent
• Language: English; French; German
• Published: 01.06.2022
• Subjects: ARTIFICIAL STONE; BUILDING; BUILDING MATERIALS; CEILINGS; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; FIXED CONSTRUCTIONS; FLOORS; GENERAL BUILDING CONSTRUCTIONS; INSULATION OR OTHER PROTECTION OF BUILDINGS; LIME, MAGNESIA; METALLURGY; PERFORMING OPERATIONS; REFRACTORIES; ROOFS; SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURESCONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER; SLAG; STRUCTURAL ELEMENTS; TRANSPORTING; TREATMENT OF NATURAL STONE; WALLS, e.g. PARTITIONS; WORKING CEMENT, CLAY, OR STONE

An object is to provide a prestressed concrete that can be widely used for general building members, in which a chemical stress induced by an expansive material and a mechanical stress induced by a continuous fiber reinforcing wire are simultaneously used together, and due to a synergistic effect of the mechanical stress and the chemical stress, the strength is increased, the reduction in weight, reduction in thickness, and suppression of cracking are achieved, and the degree of freedom in design is increased. To provide a prestressed concrete characterized in that, in a concrete into which a prestress is introduced, a mechanical stress induced by a tensional material and a chemical stress induced by an expansive material for a concrete are introduced simultaneously into the concrete, the tensional material is a continuous fiber reinforcing wire, the expansive material for a concrete is contained in an amount of 5 to 30 kg /m3, and aluminum oxide is contained in an amount of 0.2 to 2.0% by weight to the expansive material.