Invention Grant
- Patent Title: Concrete vacuum tube segment for hyper-speed transportation system using ultra-high performance concrete (UHPC), and manufacturing method thereof
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Application No.: US17110314Application Date: 2020-12-03
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Publication No.: US11773021B2Publication Date: 2023-10-03
- Inventor: Gum Sung Ryu , Jae Yoon Kang , Gi Hong An , Byung Suk Kim , Jae Joon Song , Kyung Taek Koh , Jong Dae Baek
- Applicant: KOREA INSTITUTE OF CIVIL ENGINEERING AND BUILDING TECHNOLOGY
- Applicant Address: KR Gyeonggi-Do
- Assignee: KOREA INSTITUTE OF CIVIL ENGINEERING AND BUILDING TECHNOLOGY
- Current Assignee: KOREA INSTITUTE OF CIVIL ENGINEERING AND BUILDING TECHNOLOGY
- Current Assignee Address: KR Gyeonggi-do
- Agency: JCIPRNET
- Priority: KR 20200145567 2020.11.03
- Main IPC: C04B24/26
- IPC: C04B24/26 ; C04B16/06 ; C04B14/38 ; C04B20/10 ; C04B40/00 ; B28B1/14 ; C04B28/02 ; C04B18/14 ; C04B14/06 ; C04B14/48 ; C04B14/42 ; C04B14/46 ; C04B103/00 ; C04B103/30 ; C04B103/50

Abstract:
The present invention provides a concrete vacuum tube segment for a hyper-speed transportation system using ultra-high performance concrete (UHPC) and a manufacturing method thereof. A concrete vacuum tube segment for a hyper-speed transportation system can be easily manufactured using UHPC, in which shrinkage and structural cracking do not occur due to mixing a binder and a short fiber to secure airtightness on the basis of a maximum fill theory, and accordingly, shrinkage of the concrete vacuum tube segment can be reduced even in a partial-vacuum state in which the magnitude of drying shrinkage is very small and quick drying occurs; when mixing the UHPC, an antifoaming agent is mixed and a circular vacuum pump is used to remove generated entrapped air to minimize the entrapped air; and a capsule-type crack healing material, which is able to repair fine cracks, is compacted to secure airtightness of the concrete vacuum tube segment.
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