Abstract: The subject of the present invention is a process for preparing a bituminous product, characterized in that a compound based on a phosphoric or polyphosphoric acid supported on a mineral oxide of high porosity is used. The subject of the invention is also the bituminous product that can be obtained by the above process, and its uses.

Abstract: The invention concerns a novel phosphomagnesium mortar and the method for obtaining such a mortar. The mortar is a phosphomagnesium mortar comprising a phosphomagnesium binder containing a phosphorus compound and a magnesium compound, granular elements, and water in a E/L ratio less than 0.38, E representing the amount of water and L the amount of magnesium compound, and whereof the fluidity is at least 150%.

Abstract: The invention concerns a cement comprising at least a hydraulic binder and anisotropic polymer particles whereof the modulus of elasticity is not more than 10 GPa and whereof the longest dimension ranges on an average between 0.6 and 6 mm. The invention also concerns a cement paste and the corresponding consolidated material, the method for obtaining the cement, the paste and the material and their uses in the building sector, in public works and in oil and gas extraction.

Abstract: A concrete includes organic fibers, dispersed in a cement matrix. The cement matrix includes elements having predetermined particle sizes. The organic fibers have predetermined lengths and diameters. The behavior of the concrete is improved both with respect to the occurrence of minute cracks and the propagation of large cracks as a result of a synergistic effect between the cement matrix and the organic fibers.

Abstract: The subject of the present invention is a process for preparing a bituminous product, characterized in that a compound based on a phosphoric or polyphosphoric acid supported on a mineral oxide of high porosity is used. The subject of the invention is also the bituminous product that can be obtained by the above process, and its uses.

Abstract: The invention concerns a building material with hydraulic binder comprising a fibrous or filament reinforcement. The reinforcement consists of synthetic yarns and fibres, modified by a dendritic polymer. The invention concerns for example fibre cements whereof the reinforcing fibers consist of a composition comprising a polyamide and a dendritic polymer.

Abstract: The invention concerns the use of organic fibres having a melting point lower than 300° C., an average length l more than 1 mm and a diameter Ø not more than 200 &mgr;m, in ultra high performance concrete for improving the concrete fire resistance, the amount of organic fibres 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.

Abstract: The invention concerns a novel phosphomagnesium mortar and the method for obtaining such a mortar. The mortar is a phosphomagnesium mortar comprising a phosphomagnesium binder containing a phosphorus compound and a magnesium compound, granular elements, and water in a E/L ratio less than 0.38, E representing the amount of water and L the amount of magnesium compound, and whereof the fluidity is at least 150%.

Abstract: The invention concerns a novel phosphomagnesium hydraulic binder and a mortar obtained from said novel binder. The phosphomagnesium binder comprises at least a magnesium compound and a mixture of phosphorus compounds, the mixture comprising at least two compounds selected among an aluminum phosphate, a potassium phosphate and an ammonium phosphate. Said binder preserves good mechanical properties after exposure to high temperatures.

Abstract: The invention concerns a concrete obtained by mixing with water, cement, granular elements, elements with puzzolanic reaction, constituents capable of improving the toughness of the matrix, metal fibers and at least a dispersing agent, in specified conditions and proportions. Said concrete has improved properties compared to prior art concrete comprising metal fibers.

Abstract: The invention discloses a new phosphomagnesium cement that can be obtained by contacting at least one phosphorus compound and at least one magnesium compound based binder phase, with at least one polymer in water insoluble particle form, and water. The polymer can be selected among those derived from the polymerisation of at least one ethylenically unsaturated monomer and at least one monomer selected among monomers with carboxylic function and acrylamide or methacrylamide. The phosphomagnesium cement can also comprise an aminoalkylsilane, preferably an aminoalkyl(alkoxysilane).