FIBER FOR SELF-HEALING CRACKS OF CEMENT HARDENED BODY, MANUFACTURING METHOD THEREFOR, CEMENT HARDENED BODY CONTAINING THE SAME, AND METHOD FOR REPAIRING CRACKS OF CEMENT HARDENED BODY

摘要

PROBLEM TO BE SOLVED: To provide a fiber for self-healing cracks of a cement hardened body capable of promoting self-healing of cracks of a cement hardened body, a manufacturing method therefor, a cement hardened body containing the same, and a method for repairing cracks of the cement hardened body.;SOLUTION: The nylon fiber for self-healing cracks of a cement hardened body has nylon 66 occupying at least a part of a fiber surface and single fiber strength of 3 cN/dtex or more. The manufacturing method of the fiber for self-healing cracks of the cement hardened body, includes a process for: melting and spinning nylon 66 having melt flow rate at 270°C of 5 to 100 g/10 minute so that the nylon 66 occupies at least a part of surface of the fiber; applying them to wet drawing in presence of water at a temperature of 10 to 80°C; and then subjecting them to thermal setting at a dry heat temperature higher than the drawing temperature. The cement hardened body contains the fiber for self-healing cracks of the cement hardened body and cement.;SELECTED DRAWING: None;COPYRIGHT: (C)2018,JPO&INPIT