ASTM D5081/D5081M-90(2018)
(Test Method)Standard Test Method for Aggregate Layer Hiding Power
Standard Test Method for Aggregate Layer Hiding Power
SIGNIFICANCE AND USE
4.1 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
- Status
- Published
- Publication Date
- 30-Apr-2018
- Technical Committee
- D08 - Roofing and Waterproofing
Relations
- Effective Date
- 01-May-2018
- Effective Date
- 01-May-2020
- Effective Date
- 01-Nov-2019
- Effective Date
- 15-Dec-2018
- Effective Date
- 15-Dec-2018
- Effective Date
- 01-Feb-2016
- Effective Date
- 15-Dec-2013
- Effective Date
- 01-Mar-2013
- Effective Date
- 01-Mar-2013
- Refers
ASTM D448-12 - Standard Classification for Sizes of Aggregate for Road and Bridge Construction - Effective Date
- 01-Dec-2012
- Effective Date
- 01-Aug-2011
- Effective Date
- 01-Sep-2010
- Effective Date
- 01-Jul-2009
- Refers
ASTM D448-08 - Standard Classification for Sizes of Aggregate for Road and Bridge Construction - Effective Date
- 01-Jul-2008
- Effective Date
- 01-Feb-2008
Overview
ASTM D5081/D5081M-90(2018) specifies the Standard Test Method for Aggregate Layer Hiding Power. Developed by ASTM International, this roofing standard is crucial for evaluating the capacity of roofing aggregates to shield membranes from potentially destructive sunlight. Through controlled laboratory conditions, the test determines the amount of aggregate required to form an opaque layer, thus preventing light transmission. This method applies whether measurements are taken in SI units or inch-pound units, but units must not be combined.
Key Topics
- Purpose of the Test: This standard addresses the need to quantify how much roofing aggregate-such as gravel or ballast-is necessary to fully block light, thereby protecting roofing membranes from UV and sunlight exposure.
- Aggregate Size Classification: Aggregates tested according to this method should comply with size numbers 1 through 8 as per ASTM D448.
- Units and Measurement: Both SI and inch-pound units are referenced, but each method must be used independently.
- Laboratory Conditions: The test uses standardized apparatus-including a light exposure box, a 150-W floodlight, light-sensitive paper, and a counting template-to simulate and measure aggregate coverage effectiveness.
- Data Reporting and Interpretation: Results include specifics such as the percent opacity achieved at different aggregate application rates, the aggregate type and size, and the quantity needed for full (100%) opacity.
Applications
- Protection of Roofing Membranes: This test method is essential for manufacturers, specifiers, and installers of bituminous and built-up roofing systems, ensuring that selected aggregates provide adequate light exclusion and thus enhance membrane durability.
- Quality Control for Roofing Materials: Roofing material producers can use this method to verify aggregate coverage performance, supporting product development and compliance with construction specifications.
- Regulatory and Industry Compliance: The standard assists in meeting industry best practices and regulatory requirements, reducing risks of premature membrane degradation due to UV or light exposure.
- Specification Development for Projects: Engineers and architects can reference test results to determine the optimal aggregate size and application rate for specific project needs, ensuring reliable and lasting membrane protection.
Related Standards
- ASTM D448 - Standard Classification for Sizes of Aggregate for Road and Bridge Construction: Referenced for aggregate size classification.
- ASTM D75/D75M - Standard Practice for Sampling Aggregates: Provides procedures for representative sampling of aggregates.
- ASTM C702/C702M - Standard Practice for Reducing Samples of Aggregate to Testing Size: Guides aggregate specimen preparation.
- ASTM D1079 - Terminology Relating to Roofing and Waterproofing: Reference for key roofing terms used in this standard.
Practical Value
Implementing the procedures in ASTM D5081/D5081M-90(2018) ensures that roofing aggregates deliver reliable hiding power, safeguarding structural investments and enhancing building longevity. Accurate application of this aggregate hiding power test method helps stakeholders make informed decisions when selecting, specifying, or verifying roofing materials to comply with modern building standards and withstand environmental exposures. This standard is recognized as a best practice for optimal roofing aggregate performance in both commercial and industrial applications.
Frequently Asked Questions
ASTM D5081/D5081M-90(2018) is a standard published by ASTM International. Its full title is "Standard Test Method for Aggregate Layer Hiding Power". This standard covers: SIGNIFICANCE AND USE 4.1 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
SIGNIFICANCE AND USE 4.1 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
ASTM D5081/D5081M-90(2018) is classified under the following ICS (International Classification for Standards) categories: 87.060.10 - Pigments and extenders. The ICS classification helps identify the subject area and facilitates finding related standards.
ASTM D5081/D5081M-90(2018) has the following relationships with other standards: It is inter standard links to ASTM D5081/D5081M-90(2011)e1, ASTM D1079-20, ASTM D75/D75M-19, ASTM D1079-18, ASTM D1079-18e1, ASTM D1079-16, ASTM D75/D75M-13, ASTM D1079-13, ASTM D1079-13e1, ASTM D448-12, ASTM C702/C702M-11, ASTM D1079-10, ASTM D1079-09, ASTM D448-08, ASTM D1079-08a. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ASTM D5081/D5081M-90(2018) is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D5081/D5081M − 90 (Reapproved 2018)
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.
1. Scope 3. Terminology
3.1 Definitions—For definitions of terms used in this test
1.1 This test method measures the quantity of aggregate
method, see Terminology D1079.
neededtoprovideanopaquelayerunderlaboratoryconditions.
Aggregate size Numbers 1 through 8, as listed in Classification
4. Significance and Use
D448, may be tested.
4.1 One of the functions of a roofing aggregate is to shield
1.2 The values stated in either SI units or inch-pound units
the roofing membrane from sunlight that may be destructive to
are to be regarded separately as standard. The values stated in
the roofing membrane. This test method measures the quantity
each system may not be exact equivalents; therefore, each
of gravel needed to exclude light under arbitrary laboratory
system shall be used independently of the other. Combining
conditions. This test method need not be performed if the
values from the two systems may result in non-conformance
roofing membrane is not affected by light exposure.
with the standard.
1.3 This standard does not purport to address all of the
5. Apparatus
safety concerns, if any, associated with its use. It is the
2 2
5.1 Exposure Box, 300-mm [12-in. ] 6 1 % tray, 90 mm
responsibility of the user of this standard to establish appro-
[3.6 in.] minimum deep with an opaque lid.
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
5.2 Light Source—150-W floodlight with stand.
1.4 This international standard was developed in accor-
5.3 Counting Template—A clear plastic mask with 100-
2 2
dance with internationally recognized principles on standard-
mm [4-in. ] grid of lines 10 mm [0.4 in.] apart to result in 100
ization established in the Decision on Principles for the
counting cells.
Development of International Standards, Guides and Recom-
5.4 Light Sensitive Paper—Rapid printing opaque diazo
mendations issued by the World Trade Organization Technical
papers for use in diazo blueline printing machines.
Barriers to Trade (TBT) Committee.
5.5 Sample Splitter, riffle type.
−3
2. Referenced Documents
5.6 Balance, 30-kg [66-lb] capacity, sensitive to 3 × 10 %
of the capacity.
2.1 ASTM Standards:
C702/C702M Practice for Reducing Samples of Aggregate
5.7 Diazo Printing Machine.
to Testing Size
D75/D75M Practice for Sampling Aggregates
6. Sampling
D448 Classification for Sizes of Aggregate for Road and
6.1 Follow the sampling recommendations of Practice D75/
Bridge Construction
D75M.
D1079 Terminology Relating to Roofing and Waterproofing
7. Procedure
7.1 For Roofing Ballast—Fractionatetheaggregate,driedto
ThistestmethodisunderthejurisdictionofASTMCommitteeD08onRoofing
110°C[230°F]toconstantweight,usingasamplesplitter,until
and Waterproofing and is the direct responsibility of Subcommittee D08.03 on
a 25-kg [55-lb] sample is obtained. Riffle out 2.3-kg [5.1-lb],
Surfacing and Bituminous Materials for Membrane Waterproofing and Built-up
Roofing.
4.5-kg [9.9-lb], 6.8-kg [15.0-lb], and 9-kg [20.0-lb] 61%
Current edition approved May 1, 2018. Published June 2018. Originally
specimens in accordance with Practice C702/C702M.
approved in 1990. Last previous edition approved in 2011 as D5081/D5081M – 90
ɛ1
(2011) . DOI: 10.1520/D5081_D5081M-90R18.
7.2 For Builtup Roofing Aggregate—Fractionate the dried
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
aggregate sample, using the sample splitter, until a 6-kg
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
[13.4-lb]
...
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