ASTM C241/C241M-13

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Designation: C241/C241M − 13
StandardTest Method for
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Abrasion Resistance of Stone Subjected to Foot Traffic
This standard is issued under the fixed designation C241/C241M; 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 4. Significance and Use
1.1 This test method covers the determination of the abra- 4.1 Thistestmethodisusefulinindicatingthedifferencesin
sion resistance of all types of stones for floors, steps, and abrasion resistance between the various building stones. This
similar uses where the wear is caused by the abrasion of foot test method also provides one element in comparing stones of
traffic. the same type.
1.2 Units—The values stated in either SI units or inch-
5. Apparatus
pound units are to be regarded separately as standard. The
5.1 The abrasion testing apparatus shown in Fig. 1 shall be
values stated in each system may not be exact equivalents;
used. This apparatus consists essentially of a power-driven
therefore,eachsystemshallbeusedindependentlyoftheother.
grinding lap, A, 10 in. [250 mm] in diameter, which is revolved
Combining values from the two systems may result in non-
at 45 rpm; three specimen holders, B, with superimposed
conformance with the standard.
weights; gears, C, for revolving the specimen; and a means of
1.2.1 Exception—The formula for calculation of the result
feeding abrasive at a constant rate to the lap. The guide rings,
of this test method relies on the use of SI units; all measure-
D,areclampedinpositionslightlyabovethespecimenholders,
ments of weight in this test method shall be recorded in SI
andthe2000gweightbearingonthespecimenisthecombined
units. See 9.1 and 10.1.
weight of the specimen holder, vertical shaft above with the
1.3 This standard does not purport to address the safety
attached spur gear, and a weight hopper, E, containing addi-
concerns, if any, associated with its use. It is the responsibility
tional adjustment weights. The frame, F, carrying the guide
of the user of this standard to establish appropriate safety and
rings is adjustable vertically to accommodate different speci-
health practices and determine the applicability of regulatory
men thicknesses. Gears, C, are adjusted on the shafts for each
limitations prior to use.
specimen thickness, so that they are slightly above the plate, G,
2. Referenced Documents throughout the test.
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2.1 ASTM Standards:
6. Sampling
C97 Test Methods forAbsorption and Bulk Specific Gravity
6.1 The sample may be selected by the purchaser or his
of Dimension Stone
authorized agent but shall represent the average quality of the
C119 Terminology Relating to Dimension Stone
type or grade of stone under consideration. It shall be of
C1353 Test Method for Abrasion Resistance of Dimension
sufficient size to permit the preparation of at least three test
Stone Subjected to Foot Traffic Using a Rotary Platform,
specimens, and one face should have the finish to be exposed
Double-Head Abraser
to traffic. The sample preferably should be 1 in. [25 mm] thick
3. Terminology
and 8 in. [200 mm] square.
3.1 Definitions—All definitions are in accordance with Ter-
7. Test Specimens
minology C119.
7.1 At least three specimens 2 in. [50 mm] square and
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preferably 1 in. [25 mm] in thickness shall be sawed from the
This test method is under the jurisdiction of ASTM Committee C18 on
Dimension Stone and is the direct responsibility of Subcommittee C18.01 on Test
sample. The sharp edges shall be rounded by grinding to a
Methods.
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radius of approximately ⁄32 in. [1 mm] in order to prevent
Current edition approved May 1, 2013. Published May 2013. Originally
crumbling during the test.
approved in 1950. Last previous edition approved in 2009 as C241–09. DOI:
10.1520/C0241_C0241M-13.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or 8. Conditioning
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
8.1 Dry the specimens for 48 h in a ventilated oven at a
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. temperature of 140 6 4°F [60 6 2°C]. At the 46th, 47th, and
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C241/C241M − 13
FIG. 1 Apparatus for Abrasion Resistance Test of Stone
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C241/C241M − 13
48th hour, weigh the specimens to ensure that the weight is the 10. Calculati
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