The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 11, 2018
Filed:
Feb. 20, 2018
Nano and Advanced Materials Institute Limited, Hong Kong, HK;
Shuai Fang, Hong Kong, HK;
Honggang Zhu, Hong Kong, HK;
Yue Kee Lam, Hong Kong, HK;
Man Lung Sham, Hong Kong, HK;
Chi Sun Poon, Hong Kong, HK;
Feng Li, Hong Kong, HK;
Pui Lam Ng, Vilnius, LT;
Nano and Advanced Materials Institute Limited, Hong Kong, HK;
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 Dof 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.