C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 20/00 (2006.01) C04B 14/38 (2006.01) C04B 14/48 (2006.01) C04B 18/14 (2006.01) C04B 24/22 (2006.01) C04B 28/00 (2006.01) C04B 28/02 (2006.01)
Patent
CA 2403104
The invention concerns a fibre-containing cement composite whereof the cement matrix comprises a water/binder ratio less than 0.25, and consists of cement, granular elements, fine elements with pozzolanic reaction and a fluidising agent. The reinforcement consists of three types of fibres: a) metal fibres with length ranging between 15 and 25 mm, diameter ranging between 0.25 and 0.3 mm in a volume percentage ranging between 0.5 and 3 %; b) metal fibres with length ranging between 5 and 10 mm, diameter ranging between 0.15 and 0.2 mm, in a percentage between 4 and 7 %; c) 1.5 to 5 % of short metal fibres with length less than 3 mm. The uniaxial tensile strength of said composite is not less than 30 MPa. Its exhibits positive and ductile strain hardening behaviour in uniaxial tension.
L'invention concerne un composite cimentaire fibré dont la matrice cimentaire comporte un rapport eau/liant inférieur à 0,25, et est constitué de ciment, d'éléments granulaires, d'éléments fins à réaction pouzzolanique et d'un agent fluidifiant. Le renfort est constitué de trois types de fibres; a) des fibres métalliques de longueur comprise entre 15 et 25 mm de diamètre compris entre 0,25 et 0,3 mm dans un pourcentage volumique compris entre 0,5 et 3 %; b) des fibres métalliques de longueur comprise entre 5 et 10 mm de diamètre compris entre 0,15 et 0,2 mm, dans un pourcentage compris entre 4 et 7 %; c) et de 1,5 à 5 % de fibres métalliques courtes ayant une longueur inférieure à 3 mm. La résistance en traction uniaxiale de ce composite est supérieure ou égale à 30 MPa. Son comportement en traction uniaxiale est à écrouissage positif et est ductile.
Laboratoire Central Des Ponts Et Chaussees
Sim & Mcburney
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