摘要:
For reinforcing of forming materials of the cold setting type such as concrete or various cross linking plastic materials, solid or foamed, is provided a thermoplastic fibre material, the fibres of which have a surface layer of mineral particles which are partly and only partly embedded in the thermoplastic fibre material, to which the particles are firmly weld bonded, such that the exposed outer particle surfaces are firmly bondable to the forming material. Hereby the mineral particles will form a rigid connection between the forming material and a central fibre core or layer of high tensile strength, whereby the thermoplastic fibres are effectively surface bonded to the forming material so as to show a high reinforcing effect.
摘要:
There are prepared cement plates with an incorporated reinforcement of fibrillated polymeric film in the form of an open net, by means of the continuous process accomplished on Hatscheck machines and comprising, in the order, the following operative steps: a) unwinding one or more nets, each consisting of a plurality of fibrillated polymeric film layers, in an open form, from continuous reels, b) cutting such net into pieces having a length approximately equal to the circumference of the forming roll, or a length equal to the one of the entire net wound up by the roll for each plate, c) causing the net pieces to be impregnated by a cement mix optionally containing one or more wetting agents, d) depositing the net pieces onto a conveyor belt on which a cement mix layer containing from 15 to 100 parts by weight of water referred to 100 parts by weight of solids, and having a thickness at least equal to that of such net, e) subjecting the net, after its coming into contact with the cement layer, to percussion and vertical vibration actions, f) applicating vacuum in order to remove the water in excess and to raise the compactness degree between net and cement, g) winding the net-cement panel on a roll having a circumference equal to the length of the plate to be obtained, and simultaneous application of pressure, h) cutting the plate at the notch around which the ends of the net pieces are arranged, i) compressing the plate so cut.
摘要:
Manufactured articles are prepared, based on hydraulic binders, having a fibrilled polymeric reinforcement, by distributing dry powdery binder on one or more superimposed fibrilled films, and by then sprinkling the surface of the resulting assembly with water with simultaneous or successive application of vibratory motion, and by finally compressing the whole thus obtained.
摘要:
Method of reinforcing water-hardenable inorganic materials with polyalkene fibres or fibre networks, the polyalkene being stabilized by a metal phosphonate or metal phosphite with the formula in which:
R, is an alkyl group with 1-6 carbon atoms, R 2 is a hydrogen atom or an alkyl group with 1-6 carbon atoms, n take a value 1-4, y is the ratio of the valencies of the metal atom and the organic phosphonate or phosphite group, x is the residue -O - , OR 3 , or R 4 , where R 3 is an alkyl, cycloalkyl, or aryl group with 1-30 carbon atoms and R 4 is an alkyl, cycloalkyl, or aryl group with 1-30 carbon atoms, and M is a metal.
摘要:
A fiber-reinforced composite material with inorganic binder such as Portland cement. Fiber reinforcement is continuous fibrous structure, typically a fiat woven web of flat fibrillated tow bands of polypropylene prepared by stretching a polypropylene film in a ratio of at least 1:15 and fibrillating by means of a rotating needle or cutter roller to obtain fibrous elements of from about 2 to about 35 dtex.
摘要:
Formkörper mit einer durch Polyacrylnitrilfasern verstärkten Matrix aus organischem oder anorganischem Material, deren Polyacrylnitrilfasern zuvor mit einem Mineralgerbstoff behandelt wurden, weisen hervorragende Eigenschaften, insbesondere Festigkeiten auf.
摘要:
The invention relates to a composition for preparing cement concrete as well as asphalt concrete, which, besides the components of both concrete kinds, further comprise at least one from the following additives:
a) natural stones, b) synthetic materials such as one or more of the following components: foam ashes, furnace slags, expanded clay, sintered fly ashes, and expanded schists, c) synthetic fibers.