1.1 This specification covers the physical requirements, sampling, testing, and visual inspection of architectural cast stone.1.2 Units covered by this specification may be made from facing and backup mixtures or from a homogeneous mixture. Eith This specification establishes the physical requirements, sampling, testing, and visual inspection of architectural cast stone that may be made from facing and backup mixtures or from a homogeneous mixture, produced either by wet or dry casting. Confor