Crack repair material of concrete vacuum tube segment using ultra-high performance concrete (UHPC) for hyper-speed transportation system, and crack repairing method for the same

A crack repair material of a concrete vacuum tube segment using ultra-high performance concrete (UHPC) for a hyper-speed transportation system, which is a crack repair material for, in a case in which a vacuum tube segment for a hyper-speed transportation system is formed using UHPC, repairing cracks formed in the UHPC vacuum tube segment, the crack repair material comprising:

• a crack growth prevention material that is inserted into a crack part of a UHPC vacuum tube segment in a direction perpendicular thereto to prevent growth of the crack, wherein the crack growth prevention material is a carbon fiber textile;
• and
• a patch repair material that includes a textile reinforcement material, an adhesive, and a crack healing material and is attached to the crack growth prevention material on the crack part of the UHPC vacuum tube segment, wherein the crack healing material comprises a microcapsule and a polymer matrix, wherein the microcapsule is added into the polymer matrix, and wherein the microcapsule comprises methacrylate as a core material and poly(urea-formaldehyde) as a capsule film-forming material,
• wherein, when the patch repair material attached to the crack part of the UHPC vacuum tube segment allows a vacuum pump installed for the hyper-speed transportation system to operate, a pressure is generated inside the UHPC vacuum tube segment, and the adhesive and the crack healing material fill the crack according to vacuum pressure to repair the crack in the UHPC vacuum tube segment.