C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 14/06 (2006.01) C04B 14/48 (2006.01) C04B 28/18 (2006.01) C04B 40/02 (2006.01)
Patent
CA 2143660
The invention relates to a preparation of a concrete having a compression resistance of at least 400 MPa and a fracturation energy of at least 1 000 J/m<2>. A mix containing substantially cement, fine sand, amorphous silica, crushed quartz, steel wool, a fluidifying agent and water in specific proportions is mixed and, after setting, the concrete is fired at a temperature of at least 250 DEG C. The figure is a micrography showing the microstructure of concrete according to the invention. The invention provides particularly for the making of concrete parts in replacement of steel, for example anchoring heads for prestressed cables.
L'invention concerne l'obtention d'un béton ayant une résistance à la compression d'au moins 400 MPa et une énergie de fracturation d'au moins 1 000 J/m2. On malaxe un mélange contenant essentiellement du cent, du sable fin, de la silice amorphe, du quartz broyé, de la laine d'acier, un fluidifiant, et de l'eau dans des proportions spécifiques et, après la prise, on cuit le béton à une température d'au moins 250 °C. La figure est une micrographie montrant la microstructure d'un béton selon l'invention. L'invention permet notamment de réaliser des pièces en remplacement de l'acier, par exemple des têtes d'ancrage de câbles de précontrainte.
Cheyrezy Marcel Hubert
Dugat Jerome Antoine
Richard Pierre-Emile Felix
Bouygues
Bouygues Travaux Publics
Lafarge
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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