1.1 This specification covers prefaced concrete and calcium silicate masonry units with the finished face(s) covered at the point of manufacture with resin, resin and inert filler, or cement and inert filler to produce a smooth tile-like surface feature. This specification does not address, and therefore is not applicable to, ground-face concrete masonry units that 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.
1.2 The text of this specification references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
ASTM C744-21 Referenced Document
ASTM C1232 Standard Terminology for Masonry*, 2023-12-15 Update
ASTM C129 Standard Specification for Non-Load-Bearing Concrete Masonry Units
ASTM C140/C140M Standard Test Methods for Sampling and Testing Concrete Masonry Units and Related Units*, 2023-12-01 Update
ASTM C1634 Standard Specification for Concrete Facing Brick and Other Concrete Masonry Facing Units*, 2023-12-01 Update
ASTM C501 Standard Test Method for Relative Resistance to Wear of Unglazed Ceramic Tile by the Taber Abraser
ASTM C55 Standard Specification for Concrete Brick
ASTM C73 Standard Specification for Calcium Silicate Brick (Sand-Lime Brick)
ASTM C90 Standard Specification for Loadbearing Concrete Masonry Units*, 2023-12-01 Update
ASTM D2244 Standard Test Method for Calculation of Color Differences From Instrumentally Measured Color Coordinates
ASTM D2486 Standard Test Methods for Scrub Resistance of Wall Paints*, 2024-04-21 Update
ASTM D822/D822M Standard Practice for Filtered Open-Flame Carbon-Arc Exposures of Paint and Related Coatings
ASTM E84 Standard Test Method for Surface Burning Characteristics of Building Materials
ASTM C744-21 history
2021ASTM C744-21 Standard Specification for Prefaced Concrete and Calcium Silicate Masonry Units
2016ASTM C744-16 Standard Specification for Prefaced Concrete and Calcium Silicate Masonry Units
2014ASTM C744-14 Standard Specification for Prefaced Concrete and Calcium Silicate Masonry Units
2011ASTM C744-11 Standard Specification for Prefaced Concrete and Calcium Silicate Masonry Units
2010ASTM C744-10 Standard Specification for Prefaced Concrete and Calcium Silicate Masonry Units
2009ASTM C744-09 Standard Specification for Prefaced Concrete and Calcium Silicate Masonry Units
2008ASTM C744-08 Standard Specification for Prefaced Concrete and Calcium Silicate Masonry Units
2005ASTM C744-05 Standard Specification for Prefaced Concrete and Calcium Silicate Masonry Units
2004ASTM C744-04 Standard Specification for Prefaced Concrete and Calcium Silicate Masonry Units
1999ASTM C744-99 Standard Specification for Prefaced Concrete and Calcium Silicate Masonry Units