ASTM C744-05
(Specification)Standard Specification for Prefaced Concrete and Calcium Silicate Masonry Units
Standard Specification for Prefaced Concrete and Calcium Silicate Masonry Units
SCOPE
1.1 This specification covers prefaced concrete masonry units with the exposed-to-view-in-place surfaces covered at the point of manufacture with resin, resin and inert filler, or cement and inert filler to produce a smooth resinous tile facing.
1.2 The text of this standard 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.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: C 744 – 05
Standard Specification for
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Prefaced Concrete and Calcium Silicate Masonry Units
This standard is issued under the fixed designation C 744; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
Note— Sections 5.7 and 7.1 were corrected and the year date changed onApril 14, 2005.
1. Scope* D 2486 Test Method for Scrub Resistance of Interior Latex
Flat Wall Paints
1.1 This specification covers prefaced concrete masonry
E84 Test Method for Surface Burning Characteristics of
units with the exposed-to-view-in-place surfaces covered at the
Building Materials
pointofmanufacturewithresin,resinandinertfiller,orcement
and inert filler to produce a smooth resinous tile facing.
3. Terminology
1.2 The text of this standard references notes and footnotes
3.1 Terminology defined in Terminology C 1209 and
which provide explanatory material. These notes and footnotes
C 1232 shall apply for this specification.
(excluding those in tables and figures) shall not be considered
as requirements of the standard.
4. Materials
4.1 Concrete masonry units on which prefaced surfaces are
2. Referenced Documents
2 molded shall meet the requirements of:
2.1 ASTM Standards:
4.1.1 SpecificationC55 for Concrete Building Brick.
C55 Specification for Concrete Building Brick
4.1.2 Specification C73 for Calcium Silicate Face Brick
C73 Specification for Calcium Silicate Face Brick (Sand-
(Sand-Lime Brick).
Lime Brick)
4.1.3 SpecificationC90 for Loadbearing Concrete Masonry
C90 Specification for Loadbearing Concrete Masonry
Units.
Units
4.1.4 Specification C 129 for Nonloadbearing Units.
C 129 Specification for Nonloadbearing Concrete Masonry
Units
NOTE 1—Thepurchaserofprefacedunitsshouldindicatetheapplicable
C 140 Test Methods for Sampling and Testing Concrete specificationandthetypeandgradeofunitrequired.Whereprefacedunits
are required for exterior use, the manufacturer should be consulted for
Masonry Units and Related Units
material suitable for this purpose.
C 501 Test Method for Relative Resistance to Wear of
Unglazed Ceramic Tile by the Taber Abraser
5. Facing Requirements Facing Requirements
C 1209 Terminology of Concrete Masonry Units and Re-
5.1 Resistance to Crazing, Cracking, or Spalling—There
lated Units
shall be no crazing, cracking, or spalling of the facing material
C 1232 Terminology of Masonry
when the unit is tested in accordance with 7.2.
D 822 Practice for Conducting Tests on Paint and Related
5.2 Resistance to Chemicals—The condition of the surface
Coatings and Materials Using Filtered Open-Flame
shall show no change after testing with each of the chemicals
Carbon-Arc Light and Water Exposure Apparatus
listed in 7.3.
D 2244 Test Method for Calculation of Color Differences
5.3 Adhesion—When viewed without magnification, there
from Instrumentally Measured Color Coordinates
shall be no failure of the adhesion of the facing material to the
concrete masonry unit at the time of failure of the entire
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This specification is under the jurisdiction of ASTM Committee C15 on
prefaced unit when tested in compression in accordance with
Manufactured Masonry Units and is the direct responsibility of Subcommittee
7.4.
C15.03 on Concrete Masonry Units and Related Units.
5.4 Abrasion—The wear index shall exceed 130 when
Current edition approved April 14, 2005. Published April 2005. Originally
approved in 1973. Last previous edition approved in 2004 as C 744 – 04. tested in accordance with 7.5.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.5 Surface Burning Characteristics—When tested in ac-
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
cordance with 7.6, the surfaces of the prefaced units shall have
Standards volume information, refer to the standard’s Document Summary page on
a flame spread classification not greater than 25 without
the ASTM website.
*ASummary of Changes section appears at the end of this standard.
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C744–05
evidence of continued progressive combustion and shall have a 7.4 Adhesion of Facing—Test three prefaced concrete ma-
smoke density rating not greater than 50. sonry units for compressive strength in accordance with Test
5.6 Color,Tint,orTexture—Color,tint,ortextureshallbeas Methods C 140.Apply the compressive load until failure of the
specified. When tested in accordance with 7.7 and then entire unit occurs.
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