Cast Stone is used in place of natural stone and is specified under the masonry division 0470 00-04. Unlike architectural precast concrete, Cast Stone looks like natural, dimensional, cut building stone. The finish of Cast Stone looks like limestone (or, a sugar cube finish) which distinguishes it from the ‘pebbly with voids’ appearance which is normally associated with concrete. This dense finish is more resistant to water and dirt and the fine aggregates retain the granular texture through decades of exposure.
The raw material mixtures for Cast Stone are proportioned for maximum density to produce the fine-grained texture similar to natural stone. Suitable aggregates include limestone, marble, calcite, granite, quartz, natural sands, Portland cement, mineral oxide colouring pigments, chemical admixtures, and water. This range of options means Cast Stone is available in any colour and can replicate the look of limestone, brownstone, bluestone, granite, slate, travertine or marble.**