| 摘要 |
Method of casting concrete comprising steps of: mixing a metal powder into a concrete mix, putting the mixture into a mould, leaving the mixture to set forming a product, removing the product from the mould and finishing the products surface. The concrete may be a colloidal system. The mixture may include a plasticiser and a viscosity modifying agent. The mixing of the metal powder may use a high speed shearing means. The concrete mix may be self levelling, providing flow and degassing properties. The mix may include hydration accelerants and/or a reinforcement element. The metal powder may be tin, bronze, brass and/or copper. A second mixture, with a lower ratio of metal powder to concrete, may be placed in the mould. The product may be a relief. The mould may comprise a photopolymer plate. A method of providing a photopolymer plate 2 comprises arranging a backing layer 3 on a first side of a photopolymer plate 2, arranging a masking layer 5 on a second side of the photopolymer plate 2, using a laser to form holes (23 fig 3) in the masking layer, exposing portions of material through the holes to an ultra violet source 11, 12 and removing the unexposed portions forming recesses. |
