ASTM C744-21 PDF Download

The ASTM C744-21 standard is a specification that covers prefaced concrete and calcium silicate masonry units. These units have their exposed-to-view surfaces coated with resin, resin and inert filler, or cement and inert filler during the manufacturing process. The purpose of these coatings is to create a smooth resinous tile facing.

The standard specifies that the facings of these prefaced masonry units should undergo testing to ensure they meet certain requirements. These requirements include resistance to crazing, cracking, or spalling, resistance to chemicals, adhesion, abrasion, surface-burning characteristics, color, tint, texture, and soiling and cleansability.

It is important to note that this specification does not apply to ground-face concrete masonry units, which are manufactured by grinding a thin layer off the surface of a concrete masonry unit to expose aggregates within and polishing to produce a smooth, architectural finish.

The standard includes explanatory notes and footnotes, which should be considered as additional information but not as requirements of the standard itself.