ASTM D5081/D5081M-90(2011)e1
(Test Method)Standard Test Method for Aggregate Layer Hiding Power
Standard Test Method for Aggregate Layer Hiding Power
SIGNIFICANCE AND USE
One of the functions of a roofing aggregate is to shield the roofing membrane from sunlight that may be destructive to the roofing membrane. This test method measures the quantity of gravel needed to exclude light under arbitrary laboratory conditions. This test method need not be performed if the roofing membrane is not affected by light exposure.
SCOPE
1.1 This test method measures the quantity of aggregate needed to provide an opaque layer under laboratory conditions. Aggregate size Numbers 1 through 8, as listed in Classification D448, may be tested.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
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. ^REFERENCE:
ASTM Standards:
C702 Practice for Reducing Samples of Aggregate to Testing Size
D75 Practice for Sampling Aggregates
D448 Classification for Sizes of Aggregate for Road and Bridge Construction
D1079 Terminology Relating to Roofing and Waterproofing
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
´1
Designation: D5081/D5081M − 90 (Reapproved 2011)
Standard Test Method for
Aggregate Layer Hiding Power
This standard is issued under the fixed designation D5081/D5081M; 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.
´ NOTE—Units information was editorially corrected in January 2012.
1. Scope 4. Significance and Use
4.1 One of the functions of a roofing aggregate is to shield
1.1 This test method measures the quantity of aggregate
the roofing membrane from sunlight that may be destructive to
neededtoprovideanopaquelayerunderlaboratoryconditions.
the roofing membrane. This test method measures the quantity
AggregatesizeNumbers1through8,aslistedinClassification
of gravel needed to exclude light under arbitrary laboratory
D448, may be tested.
conditions. This test method need not be performed if the
1.2 The values stated in either SI units or inch-pound units
roofing membrane is not affected by light exposure.
are to be regarded separately as standard. The values stated in
each system may not be exact equivalents; therefore, each
5. Apparatus
system shall be used independently of the other. Combining
2 2
5.1 Exposure Box, 300-mm [12-in. ] 6 1% tray, 90 mm
values from the two systems may result in non-conformance
[3.6 in.] minimum deep with an opaque lid.
with the standard.
5.2 Light Source—150-W floodlight with stand.
1.3 This standard does not purport to address all of the
5.3 Counting Template—A clear plastic mask with 100-
safety concerns, if any, associated with its use. It is the
2 2
mm [4-in. ]gridoflines10mm[0.4in.]aparttoresultin100
responsibility of the user of this standard to establish appro-
counting cells.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
5.4 Light Sensitive Paper—Rapid printing opaque diazo
papers for use in diazo blueline printing machines.
2. Referenced Documents
5.5 Sample Splitter, riffle type.
2.1 ASTM Standards: −3
5.6 Balance, 30-kg [66-lb] capacity, sensitive to 3×10 %
C702PracticeforReducingSamplesofAggregatetoTesting
of the capacity.
Size
5.7 Diazo Printing Machine.
D75Practice for Sampling Aggregates
D448Classification for Sizes of Aggregate for Road and
6. Sampling
Bridge Construction
6.1 Follow the sampling recommendations of Practice D75.
D1079Terminology Relating to Roofing and Waterproofing
7. Procedure
3. Terminology
7.1 For Roofing Ballast—Fractionatetheaggregate,driedto
3.1 Definitions—For definitions of terms used in this test
110°C[230°F]toconstantweight,usingasamplesplitter,until
method, see Terminology D1079.
a 25-kg [55-lb] sample is obtained. Riffle out 2.3-kg [5.1-lb],
4.5-kg [9.9-lb], 6.8-kg [15.0-lb], and 9-kg [20.0-lb] 61%
specimens in accordance with Practice C702.
ThistestmethodisunderthejurisdictionofASTMCommitteeD08onRoofing
7.2 For Builtup Roofing Aggregate—Fractionate the dried
and Waterproofing and is the direct responsibility of Subcommittee D08.03 on
aggregate sample, using the sample splitter, until a 6-kg
Surfacing and Bituminous Materials for Membrane Waterproofing and Built-up
Roofing.
[13.4-lb] sample is obtained. Riffle out 1.394-kg [3.073-lb],
Current edition approved Nov. 1, 2011. Published January 2012. Originally
1.858-kg [4.096-lb], and 2.323-kg [5.12-lb] 61% specimens
approved in 1990. Last previous edition approved in 2005 as D5081–90 (2005).
in accordance with Practice C702. These specimens represent
DOI: 10.1520/D5081_D5081M-90R11E01.
2 2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or aggregate application rates of 15 kg/m [3.1 lb/ft ].
contact ASTM Customer Service at service@astm.org. Fo
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