ASTM D7063-05
(Test Method)Standard Test Method for Effective Porosity and Effective Air Voids of Compacted Bituminous Paving Mixture Samples
Standard Test Method for Effective Porosity and Effective Air Voids of Compacted Bituminous Paving Mixture Samples
SIGNIFICANCE AND USE
In this test method a compacted sample is vacuum sealed inside a plastic bag. The density of the sample, SG1, is calculated using a water displacement method, with the sample sealed. With the sample still in water, the bag is cut open. Since the sample is under vacuum and the air voids are evacuated, water will rush in to fill all the water accessible air voids in the compacted sample. With the saturated weight of sample known, an apparent maximum density, SG2, can be calculated. The difference between SG2 and SG1 is the measure of the amount of water that has penetrated the compacted sample. This difference can be used to determine the fraction of total number of voids that are accessible to water, Effective Percent Porosity or Percent Effective Air Voids.
The results obtained from this method can be used to determine the percentage of total air voids in a compacted sample that can be filled with water through surface or interconnected paths within the sample. In general, Effective Percent Porosity should be less than total percent air voids.
This method can be used for 100 mm and 150 mm diameter cylindrical samples and cubical samples.
SCOPE
1.1 This test method covers the determination of effective porosity or effective air voids of compacted mixtures by the use of a vacuum sealing method.
1.2 This method can be used for compacted field and laboratory bituminous paving samples, as well as other compacted samples with well defined geometrical shapes, such as concrete cylinders, cored rocks, and metal samples.
1.3 The results of this test method can be used to determine the degree of interconnectivity of air voids within a sample and can be correlated to permeability of compacted bituminous paving mixture samples.
1.4 A multi-laboratory precision and bias statement for this standard has not been developed at this time. Therefore, this standard should not be used for acceptance or rejection of a material for purchasing purposes.
1.5 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 requirements prior to use.
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Designation:D7063–05
Standard Test Method for
Effective Porosity and Effective Air Voids of Compacted
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Bituminous Paving Mixture Samples
This standard is issued under the fixed designation D7063; 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. Significance and Use
1.1 This test method covers the determination of effective 3.1 In this test method a compacted sample is vacuum
porosityoreffectiveairvoidsofcompactedmixturesbytheuse sealed inside a plastic bag. The density of the sample, SG1, is
of a vacuum sealing method. calculated using a water displacement method, with the sample
1.2 This method can be used for compacted field and sealed.Withthesamplestillinwater,thebagiscutopen.Since
laboratory bituminous paving samples, as well as other com- the sample is under vacuum and the air voids are evacuated,
pacted samples with well defined geometrical shapes, such as water will rush in to fill all the water accessible air voids in the
concrete cylinders, cored rocks, and metal samples. compacted sample. With the saturated weight of sample
1.3 The results of this test method can be used to determine known, an apparent maximum density, SG2, can be calculated.
thedegreeofinterconnectivityofairvoidswithinasampleand The difference between SG2 and SG1 is the measure of the
can be correlated to permeability of compacted bituminous amount of water that has penetrated the compacted sample.
paving mixture samples. This difference can be used to determine the fraction of total
1.4 A multi-laboratory precision and bias statement for this number of voids that are accessible to water, Effective Percent
standard has not been developed at this time. Therefore, this Porosity or Percent Effective Air Voids.
standard should not be used for acceptance or rejection of a 3.2 The results obtained from this method can be used to
material for purchasing purposes. determine the percentage of total air voids in a compacted
1.5 This standard does not purport to address all of the sample that can be filled with water through surface or
safety concerns, if any, associated with its use. It is the interconnected paths within the sample. In general, Effective
responsibility of the user of this standard to establish appro- Percent Porosity should be less than total percent air voids.
priate safety and health practices and determine the applica- 3.3 This method can be used for 100 mm and 150 mm
bility of regulatory requirements prior to use. diameter cylindrical samples and cubical samples.
2. Referenced Documents 4. Definitions
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2.1 ASTM Standards: 4.1 Porosity and Effective Air Voids—Total amount of air
D979 Practice for Sampling Bituminous Paving Mixtures voidswithinacompactedsamplethatcanbesaturatedbywater
D4753 Guide for Evaluating, Selecting, and Specifying through paths starting from the surface of the sample (surface
Balances and Standard Masses for Use in Soil, Rock, and connected or interconnected voids).
Construction Materials Testing
5. Apparatus
E691 Practice for Conducting an Interlaboratory Study to
Determine the Precision of a Test Method 5.1 Balance, with ample capacity, and with sufficient sensi-
tivity to enable bulk specific gravity of specimens to be
D5361 Practice for Sampling Compacted Bituminous Mix-
tures for Laboratory Testing calculated to at least four significant figures, that is to at least
three decimal places. It shall be equipped with a suitable
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apparatus to permit weighing the specimen while it is sus-
pended in water.The balance shall conform to Guide D4753 as
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This test method is under the jurisdiction of ASTM Committee D04 on Road
a class GP2 balance.
and Paving Materials and is the direct responsibility of Subcommittee D04.21 on
Specific Gravity and Density of Bituminous Mixtures.
Current edition approved on Sept. 15, 2005. Published September 2005. DOI:
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10.1520/D7063-05. The sole source of supply of the apparatus and the method known to the
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