METHOD OF MANUFACTURING HIGH STRENGTH AND HIGH TOUGHNESS CEMENT-BASED MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a method of manufacturing a high strength and high toughness cement-based material reinforced with a fiber or a wire of a shape-memory alloy.;SOLUTION: A matrix (cement-based paste, mortar, or concrete) mixed with a fiber reinforcing material or a long wire reinforcing material stretched along its length direction, which is deformed by contraction at a temperature above the strength-developing temperature, is firstly cured at a high temperature to develop the strength as well as an adhesion of the fiber and then cured at a little higher temperature than the previous temperature to exercise the shape-memory property so as to introduce prestress by the deformation of the fiber reinforcing material caused by the higher temperature curing. The fiber or the wire reinforcing material is an Fe-Mn-Si-based shape-memory alloy at least containing Fe, Mn, and Si as major components and a niobium carbide in its structure.;COPYRIGHT: (C)2005,JPO&NCIPI