Prestressed concrete for non-primary structural members

A prestressed concrete for non-primary structural members, obtained by introducing a prestress into a concrete for non-primary structural members, wherein 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, and the tensional material is a rust-resistant wire,

• the expansive material for a concrete is a mixture of one or more kinds selected from a lime-based expansive material, an ettringite-lime composite-based expansive material, an iron powder-based expansive material, a shale-based expansive material, and a silica-based expansive material,
• the rust-resistant wire of the tensional material has a wire diameter of 15 mm or less and a tensile load of 150 kN or less, and
• the concrete has a thickness of 50 mm or less.