ASTM C241-90(2005)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:C241–90 (Reapproved 2005)
Standard Test Method for
Abrasion Resistance of Stone Subjected to Foot Traffic
This standard is issued under the fixed designation C 241; 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.
1. Scope feeding abrasive at a constant rate to the lap. The guide rings,
D,areclampedinpositionslightlyabovethespecimenholders,
1.1 This test method covers the determination of the abra-
and the 2000-g weight bearing on the specimen is the com-
sion resistance of all types of stones for floors, steps, and
bined weight of the specimen holder, vertical shaft above with
similar uses where the wear is caused by the abrasion of foot
the attached spur gear, and a weight hopper, E, containing
traffic.
additional adjustment weights. The frame, F, carrying the
1.2 This standard does not purport to address the safety
guide rings is adjustable vertically to accommodate different
concerns, if any, associated with its use. It is the responsibility
specimen thicknesses. Gears, C, are adjusted on the shafts for
of the user of this standard to establish appropriate safety and
each specimen thickness, so that they are slightly above the
health practices and determine the applicability of regulatory
plate, G, throughout the test.
limitations prior to use.
6. Sampling
2. Referenced Documents
6.1 The sample may be selected by the purchaser or his
2.1 ASTM Standards:
authorized agent but shall represent the average quality of the
C97 Test Methods for Absorption and Bulk Specific Grav-
type or grade of stone under consideration. It shall be of
ity of Dimension Stone
sufficient size to permit the preparation of at least three test
C119 Terminology Relating to Dimension Stone
specimens, and one face should have the finish to be exposed
3. Terminology
to traffic. The sample preferably should be 1 in. (25.4 mm)
thick and 8 in. (203.2 mm) square.
3.1 Definitions—All definitions are in accordance with Ter-
minologyC119.
7. Test Specimens
4. Significance and Use
7.1 At least three specimens 2 in. (50.8 mm) square and
preferably 1 in. (25.4 mm) in thickness shall be sawed from the
4.1 Thistestmethodisusefulinindicatingthedifferencesin
sample. The sharp edges shall be rounded by grinding to a
abrasion resistance between the various building stones. This
radius of approximately ⁄32 in. (0.8 mm) in order to prevent
test method also provides one element in comparing stones of
crumbling during the test.
the same type.
8. Conditioning
5. Apparatus
8.1 Dry the specimens for 48 h in a ventilated oven at a
5.1 The abrasion testing apparatus shown in Fig. 1 shall be
temperature of 60 6 2°C (140 6 4°F). At the 46th, 47th, and
used. This apparatus consists essentially of a power-driven
48th hour, weigh the specimens to ensure that the weight is the
grinding lap, A, 10 in. (254 mm) in diameter, which is revolved
same. If the weight continues to drop, continue to dry the
at 45 rpm; three specimen holders, B, with superimposed
specimens until there are three successive hourly readings with
weights; gears, C, for revolving the specimen; and a means of
the same weight.After removing the specimens from the oven,
cool them to room temperature in a desiccator before testing
This test method is under the jurisdiction of ASTM Committee C18 on
them.
Dimension Stone and is the direct responsibility of Subcommittee C18.01 on Test
Methods.
9. Procedure
Current edition approved Nov. 1, 2005. Published November 2005. Originally
approved in 1950 as C 241 – 50 T. Last previous edition approved in 1997 as
9.1 Weigh the test specimens to the nearest 0.01 g; then
C 241 – 90(1997).
place them in the abrasion testing apparatus and abrade for 225
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
revolutions of the grinding lap with No. 60 Alundum abrasive
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
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