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:
Apr. 19, 2005
Filed:
Feb. 08, 2001
Gilles Orange, Soisy sous Montmorency, FR;
Evelyne Prat, Pantin, FR;
Pascal Casanova, Lyons, FR;
Mouloud Behloul, Paris, FR;
Gilles Orange, Soisy sous Montmorency, FR;
Evelyne Prat, Pantin, FR;
Pascal Casanova, Lyons, FR;
Mouloud Behloul, Paris, FR;
Rhodia Chimie, Boulogne Billancourt Cedex, FR;
Bouygues Travaux Publics, Saint Quentin Yvelines Cedex, FR;
Lafarge, Paris, FR;
Abstract
The invention concerns the use of organic fibers having a melting point lower than 300° C., an average length l more than 1 mm and a diameter Ø not more than 200 μm, in ultra high performance concrete for improving the concrete fire resistance, the amount of organic fibers being such that their volume ranges between 0.1 and 3% of the concrete volume after setting and the concrete having a compressive strength at 28 days of at least 120 Mpa, a bending strength of at least 20 Mpa, and a spread value in non-hardened state of at least 150 mm, the values being for a concrete preserved at 20° C., the concrete consisting of a particularly hardened cement matrix wherein metal fibres are dispersed.