ASTM C90 specifies the following tests for load-bearing concrete masonry units for VERASTONE 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 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