US 11,773,021 B2
Concrete vacuum tube segment for hyper-speed transportation system using ultra-high performance concrete (UHPC), and manufacturing method thereof
Gum Sung Ryu, Gyeonggi-do (KR); Jae Yoon Kang, Gyeonggi-do (KR); Gi Hong An, Gyeonggi-do (KR); Byung Suk Kim, Gyeonggi-do (KR); Jae Joon Song, Seoul (KR); Kyung Taek Koh, Gyeonggi-do (KR); and Jong Dae Baek, Gyeonggi-do (KR)
Assigned to KOREA INSTITUTE OF CIVIL ENGINEERING AND BUILDING TECHNOLOGY, Gyeonggi-do (KR)
Filed by KOREA INSTITUTE OF CIVIL ENGINEERING AND BUILDING TECHNOLOGY, Gyeonggi-Do (KR)
Filed on Dec. 3, 2020, as Appl. No. 17/110,314.
Claims priority of application No. 10-2020-0145567 (KR), filed on Nov. 3, 2020.
Prior Publication US 2022/0135479 A1, May 5, 2022
Int. Cl. C04B 24/26 (2006.01); C04B 16/06 (2006.01); C04B 14/38 (2006.01); C04B 20/10 (2006.01); C04B 40/00 (2006.01); B28B 1/14 (2006.01); C04B 28/02 (2006.01); C04B 18/14 (2006.01); C04B 14/06 (2006.01); C04B 14/48 (2006.01); C04B 14/42 (2006.01); C04B 14/46 (2006.01); C04B 103/00 (2006.01); C04B 103/30 (2006.01); C04B 103/50 (2006.01)
CPC C04B 24/2641 (2013.01) [B28B 1/14 (2013.01); C04B 14/06 (2013.01); C04B 14/386 (2013.01); C04B 14/42 (2013.01); C04B 14/4668 (2013.01); C04B 14/48 (2013.01); C04B 16/0691 (2013.01); C04B 18/146 (2013.01); C04B 20/1037 (2013.01); C04B 28/02 (2013.01); C04B 40/0046 (2013.01); C04B 2103/0067 (2013.01); C04B 2103/302 (2013.01); C04B 2103/50 (2013.01); C04B 2201/52 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A concrete vacuum tube segment for a hyper-speed transportation system using ultra-high performance concrete (UHPC), wherein the UHPC comprises:
100 parts by weight of cement as a binder (B);
20 to 30 parts by weight of silica fume as the binder (B);
15 to 25 parts by weight of quartz powder as the binder (B);
100 to 120 parts by weight of fine aggregate;
20 to 28 parts by weight of mixing water (W);
4 to 7 parts by weight of a high-performance water reducing agent; and
1.6 to 2.2 parts by weight of an antifoaming agent,
wherein the UHPC is mixed with a short fiber and a capsule-type crack healing material to form a self-healing cement composite, a volume of the mixed short fiber is 1.5 to 2% of the entire volume of the self-healing cement composite, and a volume of the mixed capsule-type crack healing material is 0.5 to 2% of the entire volume of the self-healing cement composite.