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 |
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.
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