Abstract: One type of plant for transporting, handling and processing materials such as sand, gravel, crushed aggregate, soil, peat and recoverable excavated material. A screening plant for particularly screening of said materials comprises at least one feed station onto or into which material to be screened is brought or fed for discharge onto a screen conveyor which feeds the material to a further station such as a screening device wherein screening is carried out. In order to permit mixing principally everywhere mixing is necessary or convenient, the screening plant is also provided with at least one mixing device positionable in at least one operating position and an inoperative or rest position, when in operating position, the mixing device permits mixing of two or more of the above materials which have been supplied to the screening plant when these materials pass the mixing device.

Abstract: A device for relieving the ground floor of a building from pressure due to underground water, whereby a relieving layer is disposed between the floor and a sealing layer for preventing underground water from reaching the floor and sustaining the pressure load applied by the water.