ASTM C744-10
(Specification)Standard Specification for Prefaced Concrete and Calcium Silicate Masonry Units
Standard Specification for Prefaced Concrete and Calcium Silicate Masonry Units
ABSTRACT
This specification covers prefaced concrete and calcium silicate masonry units with the exposed-to-view-in-place surfaces are coated with resin, resin and inert filler, or cement and inert filler during manufacture. The coatings are intended to produce smooth resinous tile facing. Facings should be tested according to the prescribed procedures and should meet the requirements for resistance to crazing, cracking, or spalling, resistance to chemicals, adhesion, abrasion, surface-burning characteristics, color, tint, texture, and soiling and cleansability.
SCOPE
1.1 This specification covers prefaced concrete and calcium silicate 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. 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.
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Designation: C744 – 10
Standard Specification for
1
Prefaced Concrete and Calcium Silicate Masonry Units
This standard is issued under the fixed designation C744; 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 (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope* C140 Test Methods for Sampling and Testing Concrete
Masonry Units and Related Units
1.1 This specification covers prefaced concrete and calcium
C501 Test Method for Relative Resistance to Wear of
silicate masonry units with the exposed-to-view-in-place sur-
Unglazed Ceramic Tile by the Taber Abraser
faces covered at the point of manufacture with resin, resin and
C1232 Terminology of Masonry
inert filler, or cement and inert filler to produce a smooth
D822 Practice for Filtered Open-Flame Carbon-Arc Expo-
resinous tile facing. This specification does not address, and
sures of Paint and Related Coatings
therefore is not applicable to, ground-face concrete masonry
D2244 Practice for Calculation of Color Tolerances and
units that are manufactured by grinding a thin layer off the
Color Differences from Instrumentally Measured Color
surface of a concrete masonry unit to expose aggregates within
Coordinates
and polishing to produce a smooth, architectural finish.
D2486 Test Methods for Scrub Resistance of Wall Paints
1.2 The text of this specification references notes and
E84 Test Method for Surface Burning Characteristics of
footnotes which provide explanatory material. These notes and
Building Materials
footnotes (excluding those in tables and figures) shall not be
considered as requirements of the standard.
3. Terminology
1.3 The values stated in inch-pound units are to be regarded
3.1 Terminology defined in Terminology C1232 shall apply
as standard. The values given in parentheses are mathematical
for this specification.
conversions to SI units that are provided for information only
and are not considered 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 Specification C55 for Concrete Building Brick.
C55 Specification for Concrete Building Brick
4.1.2 Specification C90 for Loadbearing Concrete Masonry
C73 Specification for Calcium Silicate Brick (Sand-Lime
Units.
Brick)
4.1.3 Specification C129 for Nonloadbearing Units.
C90 Specification for Loadbearing Concrete Masonry Units
4.2 Calcium silicate units on which prefaced surfaces are
C129 Specification for Nonloadbearing Concrete Masonry
molded shall meet the requirements of Specification C73 for
Units
Calcium Silicate Brick (Sand-Lime Brick).
NOTE 1—Thepurchaserofprefacedunitsshouldindicatetheapplicable
1
This specification is under the jurisdiction of ASTM Committee C15 on
specificationandthetypeandgradeofunitrequired.Whereprefacedunits
Manufactured Masonry Units and is the direct responsibility of Subcommittee
are required for exterior use, the manufacturer should be consulted for
C15.03 on Concrete Masonry Units and Related Units.
material suitable for this purpose.
Current edition approved June 1, 2010. Published June 2010. Originally
approved in 1973. Last previous edition approved in 2009 as C744 – 09. DOI:
5. Facing Requirements
10.1520/C0744-10.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.1 Resistance to Crazing, Cracking, or Spalling—There
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
shall be no crazing, cracking, or spalling of the facing material
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. when the unit is tested in accordance with 7.2.
*ASummary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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C744 – 10
TABLE 1 Resistance to Chemicals
5.2 Resistance to Chemicals—The condition of the surface
shall show no change after testing with each of the chemicals Duration of
Chemical
Test, h
listed in 7.3.
Acetic acid (CH COOH) (5 %) 24
5.3 Adhesion—When viewed without magnification, there 3
Hydrochloric acid (HCl) (10 %) 3
shall be no failure of the adhesion of the facing material to the
Potassium hydroxide (KOH) (10 %) 3
unitatthetimeoffailureoftheentireprefacedunitwhentested
Trisodium phosphate (Na PO )(5%) 24
3 4
Hydrogen peroxide (H O )(3%) 24
in compression in accordance with 7.4. 2 2
Household detergent (10 %) 24
5.4 Abrasion—The wear index shall exceed 1
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:C744–09 Designation: C744 – 10
Standard Specification for
1
Prefaced Concrete and Calcium Silicate Masonry Units
This standard is issued under the fixed designation C744; 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 (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope*
1.1 This specification covers prefaced concrete and calcium silicate 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. 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.
2. Referenced Documents
2
2.1 ASTM Standards:
C55 Specification for Concrete Building Brick
C73 Specification for Calcium Silicate Brick (Sand-Lime Brick)
C90 Specification for Loadbearing Concrete Masonry Units
C129 Specification for Nonloadbearing Concrete Masonry Units
C140 Test Methods for Sampling and Testing Concrete Masonry Units and Related Units
C501 Test Method for Relative Resistance to Wear of Unglazed Ceramic Tile by the Taber Abraser
C1232 Terminology of Masonry
D822 Practice for Filtered Open-Flame Carbon-Arc Exposures of Paint and Related Coatings
D2244 Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates
D2486 Test Methods for Scrub Resistance of Wall Paints
E84 Test Method for Surface Burning Characteristics of Building Materials
3. Terminology
3.1 Terminology defined in Terminology C1232 shall apply for this specification.
4. Materials
4.1 Concrete masonry units on which prefaced surfaces are molded shall meet the requirements of:
4.1.1 Specification C55 for Concrete Building Brick.
4.1.2Specification C73 for Calcium Silicate Face Brick (Sand-Lime Brick).
4.1.3Specification
4.1.2 Specification C90 for Loadbearing Concrete Masonry Units.
4.1.4Specification
4.1.3 Specification C129 for Nonloadbearing Units.
4.2 Calcium silicate units on which prefaced surfaces are molded shall meet the requirements of Specification C73 for Calcium
Silicate Brick (Sand-Lime Brick).
1
This specification is under the jurisdiction of ASTM Committee C15 on Manufactured Masonry Units and is the direct responsibility of Subcommittee C15.03 on
Concrete Masonry Units and Related Units.
Current edition approved Dec.June 1, 2009.2010. Published December 2009.June 2010. Originally approved in 1973. Last previous edition approved in 20052009 as
C744 – 089. DOI: 10.1520/C0744-109.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For AnnualBookofASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*ASummary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
C744 – 10
NOTE 1—The purchaser of prefaced units should indicate the applicable specification and the type and grade of unit required. Where prefaced units
are required for exterior use, the manufacturer should be consulted for material suitable for this purpose.
5. Facing Requirements
5.1 Resistance to Crazing, Cracking, or Spalling—There shall be no crazing, cracking, or spalling of the facing material when
the unit is tested in accordance with 7.2.
5.2 Resistance to Chemicals—The condition of the surface shall show no change after testing with each of the chemicals listed
in 7.3.
5.3 Adhesion—When viewed without magnification, there shall be no failure of th
...
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