Senad Teknikbetong Ab

Akzo Nobel Surface Chemistry Ab

Conpore Technology Ab

Danes Verkstader Ab

Kjell Svedman

Ingemar Johansson

Kjell Stridh

Marita Naslund

Mats Br&auml;nstr&ouml;m

Kenth Imrell

The pumpable aqueous concrete mixture has an air pore volume of 10-85 volume-%, that includes a hydrophobic resin at least partially soluble in the concrete mixture and optionally an aggregate material.

Hydrophobic concrete mixture

A method for stabilizing gravel, sand, crushed stone, rock and concrete structures which have cracks by injecting a pumpable, low viscous aqueous aerated concrete with a pore volume of at least 20% by volume into the cracks at a low pressure and then increasing the pressure so that the entrained air bubbles escape and sedimentation and hydration occur.

Method for injecting of foamed concrete and a foamed concrete

This invention relates to a method of post preparation of an injection compound which is useable for injection in for instance existing rock cracks or cracks arisen in connection with blasting away rock during for instance tunnel driving, the injection compound having been subject to a preparation, leading to that the injection compound has been given qualities with regard to shape of the crack formations of the rock. According to the invention, the method is characterized in that the injection compound is subjected to a post preparation in the form of a passage through a wire netting, the size of the mesh and the wire dimension of which being determined from a judgement of the following points: the size of the cracks and the cavities in the rock; the tendency of the injection compound to build up filter cakes; desired rheological qualities of the injection compound. The invention also relates to a device for making the method possible.

Arrangement for post preparation of an injection compound

Concrete mixture which yields concrete having high strength at varying

Method for producing of concrete with controllable density

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Ange, Sweden

Kjell Svedman