Method for producing concrete stones, especially paving...

B - Operations – Transporting – 28 – B

Patent

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Details

B28B 13/02 (2006.01)

Patent

CA 2301703

The invention relates to a method for producing concrete stones, especially paving stones, building stones or such like, comprising a base part made of coarse- grained concrete (6) and a coloured facing layer made of concrete mortar which solidly covers the top of the base part. The coarse-grained concrete (6) is filled into a shaping tool (3) and compacted by vibrating and/or pressing in the shaping tool (3). From a storage reservoir (5) coloured concrete mortar is deposited on the coarse-grained concrete in the sunk chamber of the shaping tool (3) and compacted. The invention aims to make it possible to obtain concrete mortar mixtures for preparing facing layers having a similar defined aspect. To this end the concrete mortar constituting the facing layer is formed of differently coloured layers (8, 9, 10, 11) which are stored in a stacked manner at the top of the reservoir (5). The concrete layers (8, 9, 10, 11) jointly and simultaneously are freely moved downwards by gravity together with partial sections and collide with or are guided onto an impact element (12) which is configured at a variable distance from the wall of the storage reservoir (5) and projects into the travel path of the partial sections. The partial sections are further guided by the impact element (12) along at least one deflection path and then mixed. As multicoloured concrete mortar they form, on the coarse-grained concrete, a marbled facing layer to be compacted.

L'invention concerne un procédé de production de blocs en béton, notamment de pavés, pierres à bâtir ou similaires, au moyen d'un corps de base constitué de béton à gros grains (6) et d'une couche de parement colorée, en mortier de béton, recouvrant solidement le dessus du corps de base. Le béton à gros grains (6) est versé dans un moule (3) où il est compacté par vibration, par compression, ou par vibration et compression. Le mortier de béton coloré est appliqué sur le béton à gros grains dans la zone abaissée du moule (3) à partir d'un réservoir (5), puis compacté. L'invention vise à permettre d'obtenir des mélanges de mortier de béton pour former des couches de parement présentant un aspect similaire défini. A cet effet, le mortier de béton formant la couche de parement est constitué de différentes couches colorées (8, 9, 10, 11) qui sont stockées de manière superposée en haut du réservoir (5). De plus, ces couches de béton (8, 9, 10, 11) sont déplacées librement vers le bas, en commun et simultanément avec des sections partielles, sous l'effet de la gravité, et viennent frapper un corps d'impact (12) formé à une distance variable de la paroi du réservoir (5) et faisant saillie dans le trajet de déplacement des sections partielles. En outre, les sections partielles sont guidées par l'intermédiaire du corps d'impact (12) le long d'au moins une trajectoire de déviation, puis mélangées. En tant que mortier de béton polychrome, elles forment ensuite sur le béton à gros grains une couche de parement marbrée à compacter.

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