A METHOD OF PRODUCING CONCRETE STRUCTURES WITH A SURFACE PROTECTION AND A CONCRETE STRUCTURE PRODUCED IN ACCORDANCE WITH THE METHOD.

摘要

Method of producing concrete structures with a surface protection on an underlying concrete, by means of moulding this and at least a surface layer essentially "wet in wet". The surface layer, which consists of cement allied mortar with low water binding average ratio and a binding agent strength above 70 Mpa is casted in bottom of a mould. The underlying concrete, which consists of a concrete with lower binding agent strength than the surface layer, preferably an air entrained ballast concrete with dense structure and a strength in the range of 10-20 Mpa is casted above the surface layer. During the desiccation of the material, the surface layer shrinks less than the underlying concrete, so that pressure strains is created through deformation differences in said surface layer and underlying concrete.