This invention relates to an apparatus for simulating the appearance of individually laid materials, such as bricks or cobblestones, in a curved pattern in a concrete surface. The apparatus includes a flexible spine with a plurality of ribs extending from a surface of the flexible spine. The apparatus further includes a texture mat for imprinting a pattern, for example a brick surface, a stone surface or a wood grain surface, into the concrete surface. This invention also relates to a method of using of the apparatus for simulating the appearance of individually laid materials in the concrete surface.