公开(公告)号：US20170275203A1

公开(公告)日：2017-09-28

申请号：US15505142

申请日：2015-08-25

Applicant: TAIHEIYO CEMENT CORPORATION

Inventor： Risa NAKAYAMA ,  Katsuya KONO ,  Katsuhiko TADA ,  Hiroaki MORI ,  Shingo SUGIYAMA ,  Shinpei MAEHORI

IPC: C04B28/04 ,  C04B18/02 ,  B28B11/24 ,  C04B24/04 ,  B28B1/14 ,  C04B18/14 ,  C04B14/04

CPC classification number: C04B28/04 ,  B28B1/14 ,  B28B11/245 ,  C04B7/02 ,  C04B14/04 ,  C04B14/38 ,  C04B14/48 ,  C04B16/06 ,  C04B18/02 ,  C04B18/14 ,  C04B18/146 ,  C04B22/06 ,  C04B24/04 ,  C04B24/26 ,  C04B28/02 ,  C04B40/02 ,  C04B40/0263 ,  C04B2103/302 ,  C04B2103/50 ,  C04B2201/52 ,  Y02W30/92 ,  Y02W30/94 ,  C04B14/06 ,  C04B14/068 ,  C04B18/08 ,  C04B20/0076 ,  C04B20/008 ,  C04B2103/30 ,  C04B2103/32

Abstract: Provided is a cement composition that has high fluidity (for example, a 0-drop flow value of 200 mm or more) before curing and exhibits high compressive strength (for example, 320 N/mm2 or more) after curing. The cement composition includes a cement, a silica fume having a BET specific surface area of from 10 m2/g to 25 m2/g, an inorganic powder having a 50% cumulative particle size of from 0.8 μm to 5 μm, a fine aggregate having a maximum particle size of 1.2 mm or less, a water reducing agent, an antifoaming agent, and water. The ratio of the cement is from 55 vol % to 65 vol %, the ratio of the silica fume is from 5 vol % to 25 vol %, and the ratio of the inorganic powder is from 15 vol % to 35 vol % in the total amount of 100 vol % of the cement, the silica fume, and the inorganic powder.

公开(公告)号：US20190276363A1

公开(公告)日：2019-09-12

申请号：US16423498

申请日：2019-05-28

Applicant: TAIHEIYO CEMENT CORPORATION

Inventor： Risa NAKAYAMA ,  Katsuya KONO ,  Katsuhiko TADA ,  Hiroaki MORI ,  Shingo SUGIYAMA ,  Shinpei MAEHORI

IPC: C04B28/04 ,  C04B40/02 ,  C04B22/06 ,  C04B24/26 ,  C04B7/02 ,  C04B14/38 ,  C04B28/02 ,  C04B18/02 ,  B28B1/14 ,  B28B11/24 ,  C04B14/04 ,  C04B18/14 ,  C04B24/04 ,  C04B16/06 ,  C04B14/48

Abstract: Provided is a cement composition that has high fluidity (for example, a 0-drop flow value of 200 mm or more) before curing and exhibits high compressive strength (for example, 320 N/mm2 or more) after curing. The cement composition includes a cement, a silica fume having a BET specific surface area of from 10 m2/g to 25 m2/g, an inorganic powder having a 50% cumulative particle size of from 0.8 μm to 5 μm, a fine aggregate having a maximum particle size of 1.2 mm or less, a water reducing agent, an antifoaming agent, and water. The ratio of the cement is from 55 vol % to 65 vol %, the ratio of the silica fume is from 5 vol % to 25 vol %, and the ratio of the inorganic powder is from 15 vol % to 35 vol % in the total amount of 100 vol % of the cement, the silica fume, and the inorganic powder.