摘要:
High fluidity polyamides are used for the impregnation of reinforcing cloth materials, namely, industrial fabrics, which impregnated cloths are converted into composite shaped articles.
摘要:
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.
摘要:
The invention relates to the use of precipitated silica having a DOP oil absorption of at least 260 ml/100 g as a raw material in order to produce a colorant by impregnating said silica with an inorganic pigment in the form of a soluble salt and, in particular, with an inorganic pigment based on soluble iron sulphate. The invention also relates to a colorant that can be produced by calcinating and, optionally, grinding a precipitated silica with a DOP oil absorption of at least 260 ml/100 g which has already been impregnated using an inorganic pigment in the form of a soluble salt, such as a soluble iron sulphate-based inorganic pigment. The colorant thus obtained can be used to dye ceramic materials, such as ceramic tiles, and bituminous or hydraulic binding materials.
摘要:
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.
摘要:
An additive for a bitumen or polymer modified bitumen product, which is prepared by mixing together a sulphur-based product, a vulcanized rubber, for example, a waste vulcanized rubber, preferably a fatty acid, and a bitumen, is described. The use of this additive for preparing, with very limited gaseous emissions, elastomer-containing bituminous product is also described. Such use may be especially suitable for making bituminous coated material including, for example, asphalt concrete.
摘要:
Composite propping agents of low density and of high mechanical strength are based on a thermoplastic polymer matrix, in particular having low compressive deformation at high temperatures are especially useful in the field of well fracturing for the recovery of sludges, liquids and gases present in underground reservoirs, and in particular in the field of the extraction of hydrocarbons, such as crude oil or natural gas.
摘要:
The present invention relates to a process for improving the physicochemical properties of bitumen compositions and also to novel bitumen compositions with improved properties and to their uses in a process for preparing hot bitumen mixes or in a process for preparing cold bitumen mixes.
摘要:
The invention concerns the use of dispersed precipitated silica as raw material for obtaining a dye, by mixture with an inorganic pigment, in particular with a inorganic pigment based on an iron compound. The invention also concerns a dye obtainable by calcining a dispersed precipitated silica and an inorganic pigment, in particular an inorganic pigment based on an iron compound. The resulting dye can be used for dyeing ceramic materials, such as ceramic roof tiles or floor tiles, and materials containing hydraulic or bituminous binder.
摘要:
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.
摘要:
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.