ASTM D5081-90(2005)

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 D 448, may be tested.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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.

General Information

• Status: Historical
• Publication Date: 31-Oct-2005
• ICS: 87.060.10 - Pigments and extenders
• Technical Committee: D08 - Roofing and Waterproofing
• Drafting Committee: D08.03 - Surfacing and Bituminous Materials for Membrane Waterproofing and Built-up Roofing

Relations

• Replaces: ASTM D5081-90(1999)e1 - Standard Test Method for Aggregate Layer Hiding Power
• Effective Date: 01-Nov-2005
• Replaced By: ASTM D5081/D5081M-90(2011)e1 - Standard Test Method for Aggregate Layer Hiding Power
• Effective Date: 01-Nov-2011

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D5081–90(Reapproved 2005)
Standard Test Method for
Aggregate Layer Hiding Power
This standard is issued under the fixed designation D5081; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 4. Significance and Use
1.1 This test method measures the quantity of aggregate 4.1 One of the functions of a roofing aggregate is to shield
neededtoprovideanopaquelayerunderlaboratoryconditions. the roofing membrane from sunlight that may be destructive to
AggregatesizeNumbers1through8,aslistedinClassification the roofing membrane. This test method measures the quantity
D448, may be tested. of gravel needed to exclude light under arbitrary laboratory
1.2 The values stated in SI units are to be regarded as the conditions. This test method need not be performed if the
standard. The values given in parentheses are for information roofing membrane is not affected by light exposure.
only.
5. Apparatus
1.3 This standard does not purport to address all of the
2 2
safety concerns, if any, associated with its use. It is the 5.1 Exposure Box, 300-mm (12-in. ) 6 1% tray, 90 mm
(3.6 in.) minimum deep with an opaque lid.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- 5.2 Light Source—150-W floodlight with stand.
5.3 Counting Template—A clear plastic mask with 100-
bility of regulatory limitations prior to use.
2 2
mm (4-in. )gridoflines10mm(0.4in.)aparttoresultin100
2. Referenced Documents
counting cells.
2.1 ASTM Standards: 5.4 Light Sensitive Paper—Rapid printing opaque diazo
C702 Practice for Reducing Samples of Aggregate to Test- papers for use in diazo blueline printing machines.
ing Size 5.5 Sample Splitter, riffle type.
−3
D75 Practice for Sampling Aggregates 5.6 Balance,30-kg(66-lb)capacity,sensitiveto3 310 %
D448 Classification for Sizes of Aggregate for Road and of the capacity.
Bridge Construction 5.7 Diazo Printing Machine.
D1079 TerminologyRelatingtoRoofingandWaterproofing
6. Sampling
3. Terminology
6.1 Follow the sampling recommendations of Practice D75.
3.1 Definitions—For definitions of terms used in this test
7. Procedure
method, see Terminology D1079.
7.1 For Roofing Ballast—Fractionatetheaggregate,driedto
110°C(230°F)toconstantweight,usingasamplesplitter,until
a 25-kg (55-lb) sample is obtained. Riffle out 2.3-kg (5.1-lb),
ThistestmethodisunderthejurisdictionofASTMCommitteeD08onRoofing
and Waterproofing and is the direct responsibility of Subcommittee D08.03 on 4.5-kg (9.9-lb), 6.8-kg (15.0-lb), and 9-kg (20.0-lb) 61%
Surfacing and Bituminous Materials for Membrane Waterproofing and Built-up
specimens in accordance with Practice C702.
Roofing.
7.2 For Builtup Roofing Aggregate—Fractionate the dried
Current edition approved Nov. 1, 2005. Published November 2005. Originally
´1
aggregate sample, using the sample splitter, until a 6-kg
approved in 1990. Last previous edition approved in 1999 as D5081–90 (1999) .
DOI: 10.1520/D5081-90R05.
(13.4-lb) sample is obtained. Riffle out 1.394-kg (3.073-lb),
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
1.858-kg (4.096-lb), and 2.323-kg (5.12-lb) 61% specimens
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
in accordance with Practice C702. These specimens represent
Standards volume information, refer to the standard’s Document Summary page on
2 2
the ASTM website. aggregate appli
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