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Concrete production patents

Laura HorcajadaLaura Horcajada

Production of polymer concrete molded bodies

Powder and fine sand portions, accelerator and resin are mixed in one premixer and gravel, hardener and resin are mixed in a second premixer. The separate mixtures are brought together from the buffer (15) after the first and second premixers (14, 22) to a continuous mixer (25) to give a concrete mass for molding (31). To produce molded reaction resin concrete, a number of additives of different particle size namely a powder, fine sand and gravel are mixed with liquid resin and reaction agents namely hardener and accelerator. The powder and fine sand portions and at least part of the accelerator are prepared, on one side, and the gravel and at least part of the hardener are prepared on the other side. They are prepared separately in premixers (14, 22), each with a part of the resin component. The separate mixtures are brought together from the buffer (15) after the first premixer (14) and the second premixer (22) to a continuous mixer (25) to give a concrete mass for molding (31).

Publication number: EP0940375A2 | Search similar patents

Use of pelletized sand as aggregate for concrete

1. Use of pellets manufactured from sand with the aid of fluid and if necessary a binding agent as an aggregate for concrete instead of gravel or sand.

Publication number: EP0151669A1 | Search similar patents

Method for producing concrete or mortar

The invention relates to a method for producing concrete and mortar in which a mixture of a binder, a loading material in the form of sand or gravel and water is produced and the binder is caused to harden. According to the invention, a granulate produced by blowing a liquid converter slag is used as a loading material instead of sand or gravel, this granulate containing less than 0.2 wt.% free lime (CaO).

Publication number: WO0029349A1 | Search similar patents

Fresh concrete, hardened concrete, method of making the same and use of the hardened concrete

In a process to prepare liquid concrete for construction purposes, the concrete incorporates 0.5 to 2.5% Vol. gas pores, fibers that retain their integrity to 200C, 15 Vo. binding agent e.g. Portland cement and ash, 15-22 Vol. water, 60-75 Vol. additives such as gravel. The components are mixed within the drum carried by the delivery truck.

Publication number: EP1553065A2 | Search similar patents

Method of making mixutres such as concrete

The present invention provides a method of making quality, homogenous mixtures such as concrete without premixing the separate ingredients. In the example of concrete, the ingredients of cement, gravel, sand and water are metered and delivered to the use point separately using separate delivery means such as separate pneumatic hoses. The flow or delivery rate of each ingredient is measured and separately controlled, and the outputs of the individual delivery means meet at the common use point simultaneously where the concrete is to be laid down. The ratio of the ingredients may be adjusted to tailor the mix for particular applications. The ingredients meet and mix for the first time at the use point, and no premixing is performed.

Publication number: US2004202514A1 | Search similar patents

Construction filler

[Solution] This construction filler contains: a solidification material; a fine powder as an admixed material; and sludge water obtained by separating sand and gravel from the cleaning drainage water of a facility handling concrete.

Publication number: WO2014024828A1 | Search similar patents

Plastic-modified air-placed concrete or mortar, method for producing and processing the same

The invention relates to air-placed concrete or mortar containing cement, sand and optionally gravel, as well as water and a styrene/(meth)acrylate copolymer dispersion, in which the styrene/(meth)acrylate copolymer content lies between 1 and 40 wt. % in relation to the cement content. The invention also relates to a method for producing and processing said concrete or mortar.

Publication number: WO9855420A1 | Search similar patents

Composite stone panels

A composite article comprises a mineral molded article having a solid adhesively bonded layer of gravel. An Independent claim is included for a process for the preparation of the article by coating a mineral molded article with a layer of gravel and binding agent and hardening the layer, optionally by heating.

Publication number: EP1106587A2 | Search similar patents

Cementitious compound and concrete building element formed therefrom

In cement compositions and structures, especially plaster floor, with a binder fraction, e.g. of cement or similar mineral binder, aggregate(s), e.g. sand, gravel, broken stone etc., and filler(s), e.g. plastics granulate, the particle volume of the plastics granulate is a multiple of that of a fine aggregate, e.g. sand, and another additive, e.g. broken stone, has about the same particle volume and particle size as the plastics granulate. An Independent claim is also included for plaster floors with at least 2 layers firmly bound by a binder, in which one layer contains filler bonded by binder bridges and the other contains aggregate bonded by binder bridges.

Publication number: EP0999193A1 | Search similar patents

Concrete with good fire protection properties, construction element and process for the preparation thereof

1. Concrete containing lime 'sand', chippings of two different particle sizes, hydraulic binder and water, characterized in that it contains 5 to 15% of hydraulic binder, 10 to 30% of 0/2 'sand' of limestone origin, 60 to 80% of 2/7-2/14 washed gravel, the 'sand' of limestone origin and the washed gravel being very pure limestone chippings containing less than 3% of impurities, the contents being calculated as percentages by weight of the amount of solid matter introduced, plus the water needed for mixing the cement, consisting of the water present in the limestone and of an addition of water of the order of 2 to 5%, calculated relative to the weight of solid matter.

Publication number: EP0207920A1 | Search similar patents

Concrete-containing building material, manufacturing method and use

The invention relates to a concrete-containing building material comprising a first amount of concrete sludge comprising water and dry matter, which dry matter comprises cement, gravel and sand and a second amount of cement. The invention is characterised in that the concrete sludge also comprises oil; and that the building material comprises at least a further, third component, said third component comprising gravel, and that the building material further comprises lime. Hereby hardening of the concrete sludge with components is obtained, which material can be recycled eg for road construction. Also an encapsulation of the environmentally hazardous oil is achieved.

Publication number: WO03106367A1 | Search similar patents

Method for supplying premixed lightweight concrete mass

Disclosed is a method for supplying a premixed lightweight concrete mass to a building site, with the dry matter, which includes expanded and possibly heat-treated Styropor particles and cement, being mixed and watered. To provide a simple transport of a ready-mixed concrete mass without having to use expensive transport mixers, the invention calls for the premixed masses to be filled in leakproof sacks, preferably sacks made of plastic, and transported to the building site, where they are emptied.

Publication number: WO9512558A1 | Search similar patents

Method for producing a concrete mixture

The invention relates to a novel method for producing a concrete mixture. According to said method, in a preliminary mixing stage, water and fine-grained concrete components, at least cement and as required sand, in a quantity of between 2 and 97 % of the total sand fraction in the concrete mixture, filler and a water-reducing admixture are pre-mixed in a mixing process and by ultrasonic treatment and then in a final mixing stage the mixture produced from water and fine-grained concrete components, at least consisting of cement, is subsequently mixed into the remaining sand and the coarse crushed rock. The advantages of the method are characterised by reduced energy expenditure during the mixing of the concrete and by an increased strength of the concrete.

Publication number: WO2008152111A2 | Search similar patents

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