公开(公告)号：US20180237338A1

公开(公告)日：2018-08-23

申请号：US15899376

申请日：2018-02-20

Applicant: Nano and Advanced Materials Institute Limited

Inventor： Shuai FANG ,  Honggang ZHU ,  Yue Kee LAM ,  Man Lung SHAM ,  Chi Sun POON ,  Feng LI ,  Pui Lam NG

IPC: C04B18/08 ,  C04B18/14 ,  C04B14/02 ,  C04B14/48 ,  C04B16/06 ,  C04B20/00 ,  C04B20/10 ,  C04B24/28

CPC classification number: C04B18/08 ,  C04B14/026 ,  C04B14/48 ,  C04B16/0625 ,  C04B18/146 ,  C04B20/0036 ,  C04B20/1062 ,  C04B24/283 ,  C04B2111/28 ,  C04B2201/52

Abstract: A high-workability, fire-resistant, anti-spalling concrete composition is provided. The concrete composition has a slump value of at least approximately 150 mm, a fire-resistant period of at least 4 hours, a compressive strength of at least 120 MPa at room temperature, and a compressive strength of at least 20 MPa at 700° C. The composition includes cement, fly ash, silica fume, aggregate particles having a particle size D90 of approximately 20 mm or less and superplasticizer. The composition includes fiber additives including steel fibers in an amount ranging between approximately 0.1% and approximately 0.4% by volume of the concrete composition and polypropylene fibers having a melting point of approximately 200° C. or less in an amount ranging between approximately 0.05% and 0.3% by volume of the concrete composition. Carbon nanotubes are also present in an amount ranging between approximately 0.1% and approximately 0.3% by volume of the concrete composition.