ASTM C90 specifies the following tests for load-bearing concrete masonry units for VERASTONE PLUS recycled ground face masonry units Compressive Strength and Moisture Absorbency A test to ensure that blocks meet strength and moisture requirements, and are free of cracks and other defects. Complies ASTM C1262 specifies the following tests for VERASTONE PLUS recycled masonry units Freeze/Thaw Test A test to ensure that the finished facing does not crack or craze when exposed repeatedly to freeze thaw cycles Complies ASTM C744 specifies the following tests for VERASTONE PLUS recycled filled and polished ground face masonry units Cracking and Crazing A test to ensure that the units are free from cracking and/or crazing. Complies Adhesion A test to determine the adhesion of the finished facing to the block substrate. Complies Abrasion A test to measure the abrasion resistance of the finished facing. Complies Color Change A test by accelerated weathering apparatus to measure change. Complies