ASTM D5081-90(1999)e1

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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e1
Designation:D5081–90(Reapproved 1999)
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 (e) indicates an editorial change since the last revision or reapproval.
e NOTE—Editorially switched from English dominant to SI dominant.
1. Scope conditions. This test method need not be performed if the
roofing membrane is not affected by light exposure.
1.1 This test method measures the quantity of aggregate
neededtoprovideanopaquelayerunderlaboratoryconditions.
5. Apparatus
AggregatesizeNumbers1through8,aslistedinClassification
2 2
5.1 Exposure Box, 300-mm (12-in. ) 6 1% tray, 90 mm
D448, may be tested.
(3.6 in.) minimum deep with an opaque lid.
1.2 The values stated in SI units are to be regarded as the
5.2 Light Source— 150-W floodlight with stand.
standard. The values given in parentheses are for information
5.3 Counting Template—A clear plastic mask with 100-
only.
2 2
mm (4-in. )gridoflines10mm(0.4in.)aparttoresultin100
1.3 This standard does not purport to address all of the
counting cells.
safety concerns, if any, associated with its use. It is the
5.4 Light Sensitive Paper—Rapid printing opaque diazo
responsibility of the user of this standard to establish appro-
papers for use in diazo blueline printing machines.
priate safety and health practices and determine the applica-
5.5 Sample Splitter, riffle type.
bility of regulatory limitations prior to use.
−3
5.6 Balance,30-kg(66-lb)capacity,sensitiveto3 310 %
2. Referenced Documents of the capacity.
5.7 Diazo Printing Machine.
2.1 ASTM Standards:
C702 Practice for Reducing Field Samples ofAggregate to
6. Sampling
Testing Size
6.1 FollowthesamplingrecommendationsofPracticeD75.
D75 Practice for Sampling Aggregates
D448 Classification for Sizes of Aggregate for Road and
7. Procedure
Bridge Construction
7.1 For Roofing Ballast—Fractionatetheaggregate,driedto
D1079 Terminology Relating to Roofing, Waterproofing,
4 110°C(230°F)toconstantweight,usingasamplesplitter,until
and Bituminous Materials
a 25-kg (55-lb ) sample is obtained. Riffle out 2.3-kg (5.1-lb ),
3. Terminology 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.
3.1 Definitions—For definitions of terms used in this test
7.2 For Builtup Roofing Aggregate—Fractionate the dried
method, see Terminology D1079.
aggregate sample, using the sample splitter, until a 6-kg
4. Significance and Use (13.4-lb) sample is obtained. Riffle out 1.394-kg (3.073-lb),
1.858-kg (4.096-lb), and 2.323-kg (5.12-lb) 61% specimens
4.1 One of the functions of a roofing aggregate is to shield
in accordance with Practice C702. These specimens represent
the roofing membrane from sunlight that may be destructive to
2 2
aggregate application rates of 15 kg/m (3.1 lb/ft ).
the roofing membrane. This test method measures the quantity
7.3 Cut a sheet of light sensitive paper to cover the bottom
of gravel needed to exclude light under arbitrary laboratory
of the exposure box. Place the paper in the box. Position the
light source over the center of the box with 610 mm (24 in.)
between the bottom of the bulb and the paper. Cover the paper
Thistestmethodisunderthejurisdic
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