ASTM D2995-99(2004)
(Practice)Standard Practice for Estimating Application Rate of Bituminous Distributors
Standard Practice for Estimating Application Rate of Bituminous Distributors
SIGNIFICANCE AND USE
The amount of bituminous material applied to a pavement surface using a bituminous distributor can be estimated using the described procedure.
SCOPE
1.1 This practice covers the determination of transverse and longitudinal application rate of asphalt distributors in gallons per square yard (or litres per square metre).
1.2 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.
1.3 The values given in inch-pound units are to be regarded as the standard. The SI values given in parentheses are for information purposes only.
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Designation:D2995–99 (Reapproved 2004)
Standard Practice for
Estimating Application Rate of Bituminous Distributors
This standard is issued under the fixed designation D 2995; 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 (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope
1.1 This practice covers the determination of transverse and
longitudinal application rate of asphalt distributors in gallons
per square yard (or litres per square metre).
1.2 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 appro-
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
1.3 The values given in inch-pound units are to be regarded
as the standard. The SI values given in parentheses are for
information purposes only.
2. Summary of Practice
2.1 Test Method A:
2.1.1 Pre-weighed calibration pads are placed on the surface
of the roadway in front of the distributor to be calibrated. The
asphaltdistributortobecalibratedisdrivenoverthecalibration
pads while spraying asphalt. The calibration pads are removed FIG. 1 Weighing Box and Balance
from the roadway and reweighed. The weight of asphalt
applied to the pads is determined by subtraction and the rate of
application is calculated.
4. Apparatus
2.2 Test Method B:
4.1 Test Methods A and B:
2.2.1 Containers are placed under each nozzle of a bitumi-
4.1.1 Balance, sensitive to 0.1 g.
nous distributor and bituminous material is sprayed into the
4.1.2 Weighing Box or Balance Shield, to protect balance
containers for a known period of time. The volume of
from wind when the balance is in use at the project site (see
bituminous material sprayed after this period is calculated. The
Fig. 1).
transverse uniformity of bituminous material sprayed on the
4.1.3 Balance Table and Work Table, for weighing.
pavement is obtained from this calculation and the distribution
4.2 Test Method B:
of bituminous material applied longitudinally on the pavement
4.2.1 EllipticalContainers,measuringapproximately3.5in.
is calculated as a function of the distributor velocity.
(88.9 mm) along the short axis and 9 in. (228.6 mm) along the
long axis of the ellipse and 8 in. (203.2 mm) in height, capable
3. Significance and Use
of an internal volume of approximately 1 gal.
3.1 The amount of bituminous material applied to a pave-
4.2.2 Rubber Bands, capable of a snug fit when stretched
ment surface using a bituminous distributor can be estimated
around the elliptical containers.
using the described procedure.
4.2.3 Stopwatch, capable of recording to the nearest 0.1 s.
5. Materials
This practice is under the jurisdiction of ASTM Committee D04 on Road and
Paving Materials and is the direct responsibility of Subcommittee D04.24 on
5.1 Test Method A:
Bituminous Surface Treatments.
Current edition approved June 1, 2004. Published June 2004. Originally
approved in 1971. Last previous edition approved in 1999 as D 2995 – 99.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D2995–99 (2004)
the pad assemblies available to receive the asphalt as it is
sprayed onto the roadway surface.
6.1.6 As soon as the distributor has passed over the calibra-
tion pad assemblies, remove each pad assembly from the
roadway.
6.1.7 Weigheachpadtothenearest0.1g.Recordtheweight
of each pad and the pad position on the roadway on the report
form.
6.2 Test Method B:
6.2.1 Insert one plastic bag into each elliptical can.Wrap the
excess plastic over the top of the can and secure with a rubber
band.
6.2.2 Record the weight of the elliptical can, plastic and
rubber band assembly to the nearest 0.1 g.
FIG. 2 Position of Calibration Pad Assemblies for Transverse
6.2.3 Place one can assembly under each nozzle to be
Rate Determination
calibrated in the spraybar of the asphalt distributor. Ensure that
the top of the can assembly is equal to or above the bottom of
2 2
each nozzle.
5.1.1 Geotextile Pads, weighing a minimum of 8 oz/yd
6.2.4 Activate the spraybar so that when the asphalt is
and measuring 12 in. (304.8 mm) by 12 in. (304.8 mm).
sprayed from each nozzle it is completely collected in each
5.1.2 Aluminized Duct Tape, measuring 2 in. (50.8 mm)
pre-weighed can assembly. Start the stopwatch the instant the
wide and 6 in. (152.4 mm) long.
asphalt begins to fill the can assembly.
5.1.3 Butcher Paper #50, measuring 30 in. (762 mm) by
6.2.5 Stop the flow of asphalt to the spraybar when the can
950 ft, for temporary protection of geotextile pads during
assembly is approximately ⁄4 full. Stop the stopwatch the
calibration.
instant the asphalt stops flowing into the can assembly.
5.2 Test Method B:
6.2.6 Record the weight of each can assembly in the proper
5.2.1 Plastic Bags, capable of fitting inside the elliptical
space on the report form.
cans but of sufficiently larger dimension to allow folding over
6.2.7 Record the time elapsed between the beginning and
the edge of the elliptical containers once placed inside.
end of the flow of asphalt to the can assembly.
6. Procedure (Transverse Application Rate)
7. Procedure (Longitudinal Application Rate)
6.1 Test Method A:
6.1.1 Select enough of the geotextile fabric pads so that 7.1 Test Method A:
7.1.1 Prepare the cali
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