Abstract: A method and an apparatus for casting prefabricated prestressed concrete products with a substantially horizontal slipform casting process, in which method reinforcement strands are stressed in a bundle on a casting bed before the slipform casting is started, wherein the expected behavior of at least one measurable variable affecting the strand stressing process during the strand stressing process is predetermined, and the behavior of the at least one measurable variable is measured and compared to its predetermined expected behavior during the strand stressing process.
Abstract: A method and an apparatus for casting concrete products by mold casting, where concrete mix is fed in a casting mold from a casting apparatus moved above the mold, and the concrete mix is vibrated with a vibrator assembly located at least partially in the area inside a nozzle of the casting apparatus, wherein the concrete mix is vibrated in the area inside the nozzle with the vibrator assembly performing only vertical vibrating motion.
Abstract: A cap for covering a lift hole of a lifting lug of a concrete slab, which cap comprises a flat circular skirt and a central portion, wherein from the lower surface of the flat skirt extends one continuous circular protrusion or a plurality of smaller protrusions in circular formation, wherein the central portion extends upwards from the skirt and is formed to be pressed down so that the upper part of the lifting lug breaks through the central portion.
Abstract: A method and an apparatus for casting prefabricated prestressed concrete products with a substantially horizontal slipform casting process, in which method reinforcement strands are stressed in a bundle on a casting bed before the slipform casting is started, wherein the expected behavior of at least one measurable variable affecting the strand stressing process during the strand stressing process is predetermined, and the behavior of the at least one measurable variable is measured and compared to its predetermined expected behavior during the strand stressing process.
Abstract: An apparatus for sawing cured slipform cast concrete products, which apparatus comprises a frame with wheels, and a concrete saw connected movably to the frame, wherein the apparatus comprises a brushing unit for cleaning slipform casting bed.
Abstract: A concrete mix casting equipment that can be dismountably attached to a crane, and method for controlling the same, by controlling motion of the casting equipment in the horizontal plane by moving the crane, and by controlling a substantially vertical motion of the casting equipment during the operation of the casting equipment by vertically moving the lifting element of the crane such that this engages the upper part of a lower frame of the casting equipment, thereby moving the lower frame of the casting equipment vertically relative to an upper frame of the casting equipment.