ASTM C779/C779M-05
(Test Method)Standard Test Method for Abrasion Resistance of Horizontal Concrete Surfaces
Standard Test Method for Abrasion Resistance of Horizontal Concrete Surfaces
SIGNIFICANCE AND USE
The three test methods provide simulated abrasion conditions, which can be used to evaluate the effects on abrasion resistance of concrete, concrete materials, and curing or finishing procedures. They may also be used for quality acceptance of products and surface exposed to wear. They are not intended to provide a quantitative measurement of length of service.
The equipment used by each of these procedures is portable and thus suitable for either laboratory or field testing. The three procedures determine the relative wear of concrete surfaces as follows:
3.2.1 Procedure A—The revolving-disk machine operates by sliding and scuffing of steel disks in conjunction with abrasive grit.
3.2.2 Procedure B—The dressing-wheel machine operates by impact and sliding friction of steel dressing wheels.
3.2.3 Procedure C—The ball-bearing machine operates by high-contact stresses, impact, and sliding friction from steel balls.
Note 2—Diagrams of three machines meeting these specifications are shown in Fig. 1, Fig. 2, and Fig. 3.4 PROCEDURE A—REVOLVING DISKS Top
FIG. 1 Revolving Disks Abrasion Test Machine
FIG. 2 Dressing Wheel Abrasion Test Machine
FIG. 3 Ball Bearing Abrasion Test Machine
SCOPE
1.1 This test method covers three procedures for determining the relative abrasion resistance of horizontal concrete surfaces. The procedures differ in the type and degree of abrasive force they impart, and are intended for use in determining variations in surface properties of concrete affected by mixture proportions, finishing, and surface treatment. They are not intended to provide a quantitative measurement of the length of service that may be expected from a specific surface.
1.2 The values stated in SI units or inch-pound units are to be regarded separately as standard. Within the text, the inch-pound units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of each other.
1.3 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 and health practices and determine the applicability of regulatory limitations prior to use. (Warning—Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure.)²
Note 1—Other procedures are available for measuring the abrasion resistance of concrete surfaces in addition to the three procedures contained in this test method. Consideration should be given to Test Methods C 944 and C 418. The test method most closely representing service conditions should be used.
General Information
Relations
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:C779/C779M–05
Standard Test Method for
1
Abrasion Resistance of Horizontal Concrete Surfaces
This standard is issued under the fixed designation C779/C779M; 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.
1. Scope C670 Practice for Preparing Precision and Bias Statements
for Test Methods for Construction Materials
1.1 This test method covers three procedures for determin-
C944 Test Method for Abrasion Resistance of Concrete or
ing the relative abrasion resistance of horizontal concrete
Mortar Surfaces by the Rotating-Cutter Method
surfaces. The procedures differ in the type and degree of
abrasive force they impart, and are intended for use in
3. Significance and Use
determining variations in surface properties of concrete af-
3.1 The three test methods provide simulated abrasion
fected by mixture proportions, finishing, and surface treatment.
conditions, which can be used to evaluate the effects on
Theyarenotintendedtoprovideaquantitativemeasurementof
abrasion resistance of concrete, concrete materials, and curing
the length of service that may be expected from a specific
or finishing procedures. They may also be used for quality
surface.
acceptance of products and surface exposed to wear. They are
1.2 The values stated in SI units or inch-pound units are to
notintendedtoprovideaquantitativemeasurementoflengthof
be regarded separately as standard. Within the text, the
service.
inch-pound units are shown in brackets. The values stated in
3.2 The equipment used by each of these procedures is
each system are not exact equivalents; therefore, each system
portable and thus suitable for either laboratory or field testing.
shall be used independently of each other.
The three procedures determine the relative wear of concrete
1.3 This standard does not purport to address all of the
surfaces as follows:
safety concerns, if any, associated with its use. It is the
3.2.1 Procedure A—The revolving-disk machine operates
responsibility of the user of this standard to establish appro-
by sliding and scuffing of steel disks in conjunction with
priate safety and health practices and determine the applica-
abrasive grit.
bility of regulatory limitations prior to use. (Warning—Fresh
3.2.2 Procedure B—The dressing-wheel machine operates
hydraulic cementitious mixtures are caustic and may cause
2 by impact and sliding friction of steel dressing wheels.
chemical burns to skin and tissue upon prolonged exposure.)
3.2.3 Procedure C—The ball-bearing machine operates by
NOTE 1—Other procedures are available for measuring the abrasion
high-contact stresses, impact, and sliding friction from steel
resistance of concrete surfaces in addition to the three procedures
balls.
contained in this test method. Consideration should be given to Test
Methods C944 and C418. The test method most closely representing
NOTE 2—Diagrams of three machines meeting these specifications are
4
service conditions should be used.
shown in Fig. 1, Fig. 2, and Fig. 3.
2. Referenced Documents
PROCEDURE A—REVOLVING DISKS
3
2.1 ASTM Standards:
4. Apparatus
C418 Test Method for Abrasion Resistance of Concrete by
4.1 The function of the apparatus is dependent upon the
Sandblasting
3
abrasive action of the flat faces of three 60-mm (2 ⁄8-in.)
diameter, cold-rolled steel revolving disks, each attached to
1
This test method is under the jurisdiction of ASTM Committee C09 on
motor-driven vertical shafts which also revolve about a vertical
Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee
axis. The inside diameter of the resulting circular and abraded
C09.62 on Abrasion Testing of Concrete.
track shall be approximately 150 mm (6 in.) and the outside
Current edition approved Dec. 15, 2005. Published January 2006. Originally
approved in 1974. Last previous edition approved in 2000 as C779 – 00. DOI:
10.1520/C0779_C0779M-05.
2 4
Section on Safety Precautions, Manual of Aggregate and Concrete Testing, The sole source of supply of these machines known to the committee at this
Annual Book of ASTM Standards, Vol. 04.02. time isWhite Machine Co., 9591YorkAlpha Dr., North Royalton, OH 44133; Spirit
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Fabricating, Ltd., 9260 Valley View Rd., Macedonia, OH 44056. If you are aware
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM of alternative suppliers, please provide this information to ASTM International
Standards volume information, refer to the standard’s Document Summary page on Headquarters.Your comments will receive careful consideratio
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.