ASTM D6948/D6948M-03(2017)

Standard Practice for Application of Refined Coal Tar (Ready to Use, Commercial Grade)

SIGNIFICANCE AND USE
4.1 This practice is designed as a guide for architects, engineers, property owners or their representatives, or combination thereof. Its use helps ensure the satisfactory performance of the protective coating system when applied over bituminous concrete pavements.
SCOPE
1.1 This practice covers the application of emulsified refined coal tar slurry meeting the requirements of Specification D6945/D6945M Types I and II, by mechanized equipment as a weather protection and petroleum (aliphatic) solvent resistant sealer for use on bituminous concrete pavements. In order to clarify the differences between Types I and II, see 3.3 for standard definition of terms.  
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 and health 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: Historical
• Publication Date: 30-Apr-2017
• ICS: 73.040 - Coals
• Technical Committee: D08 - Roofing and Waterproofing
• Drafting Committee: D08.09 - Liquid Applied Coatings for Roofing and Asphaltic Concrete Pavement

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D6948/D6948M −03 (Reapproved 2017)
Standard Practice for
Application of Refined Coal Tar (Ready to Use, Commercial
Grade)
This standard is issued under the fixed designation D6948/D6948M; 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 Tar (Ready to Use, Commercial Grade)
1.1 This practice covers the application of emulsified re-
3. Terminology
fined coal tar slurry meeting the requirements of Specification
D6945/D6945M Types I and II, by mechanized equipment as a
3.1 Two types of mixtures are defined in Specification
weather protection and petroleum (aliphatic) solvent resistant
D6945/D6945M. The ingredients for both types of mixtures
sealer for use on bituminous concrete pavements. In order to
are normally combined at the contractor’s yard or at the job
clarify the differences between Types I and II, see 3.3 for
site. Refined coal tar emulsion meeting Specification D5727/
standard definition of terms.
D5727M is concentrated when shipped from the manufacturer
to the applicator.
1.2 The values stated in either SI units or inch-pound units
are to be regarded separately as standard. The values stated in 3.1.1 Specification D6945/D6945M Type I material—is
Specification D5727/D5727M material diluted with water
each system may not be exact equivalents; therefore, each
system shall be used independently of the other. Combining typically by the applicator after which aggregate is added.
values from the two systems may result in non-conformance
3.1.2 Specification D6945/D6945M Type II material—is
with the standard.
Specification D5727/D5727M material diluted with water
typically by the applicator after which additive and aggregate
1.3 This standard does not purport to address all of the
is added.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
3.2 The mixtures described in 3.1.1 and 3.1.2 can be
priate safety and health practices and determine the applica-
submitted to a laboratory approved by the owner for testing of
bility of regulatory limitations prior to use.
their conformance to Specification D6945/D6945MTypeIor
1.4 This international standard was developed in accor-
Type II prior to their actual use on the job.
dance with internationally recognized principles on standard-
3.3 Definitions:
ization established in the Decision on Principles for the
3.3.1 additive—one or more ingredients that can be added to
Development of International Standards, Guides and Recom-
a specific refined coal tar emulsion, water, or sand (or combi-
mendations issued by the World Trade Organization Technical
nationthereof)mixturetoimprovethecoatings’durability,fuel
Barriers to Trade (TBT) Committee.
resistance, drying time, color uniformity, or length of time
2. Referenced Documents required before opening the surface to traffic, or combination
thereof. This material can also be used to modify the wet
2.1 ASTM Standards:
mixture’s viscosity to improve aggregate suspension. Because
D490 Specification for Road Tar
there is such a wide variance of additives on the market, the
D5727/D5727M Specification for Emulsified Refined Coal
aforementioned results may not take place. If an additive is
Tar (Mineral Colloid Type)
used, it is recommended that it be supplied by the same
D6945/D6945M Specification for Emulsified Refined Coal-
manufacturer as the refined coal tar emulsion.
3.3.2 application rate—the volume of mixed materials ap-
ThispracticeisunderthejurisdictionofASTMCommitteeD08onRoofingand
plied per area of pavement surface, usually expressed in liters
Waterproofing and is the direct responsibility of Subcommittee D08.09 on Bitumi-
2 2
per square meter (L/m ) [gallons per square yard (gal/yd )].
nous Emulsions.
Current edition approved May 1, 2017. Published May 2017. Originally
3.3.3 applied mixture—the combination of all ingredients
approved in 2003. Last previous edition approved in 2011 as D6948/D6948M – 03
ɛ1 mixed together and ready for application to the pavement.Also
(2011) . DOI: 10.1520/D6948_D6948M-03R17.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or referred to as seal coat or sealer.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3.3.4 bituminous concrete pavements, new—pavements that
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. have been placed less than 90 days.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D6948/D6948M−03 (2017)
3.3.5 bituminous concrete pavements, aged—pavements 3.3.21 uniform coated surface—a surface that has an even
that weathered over at least one summer season and have distribution of seal coating material free of pinholes, streaks, or
shown signs of one or more of the following: cracking, other uneven characteristics, or combination thereof.
raveling, aggregate polishing or graying due to oxidation, or
4. Significance and Use
combination thereof.
4.1 This practice is designed as a guide for architects,
3.3.6 brush applicator—a hand type or mechanized brush
engineers, property owners or their representatives, or combi-
used to apply pavement sealer.
nation thereof. Its use helps ensure the satisfactory perfor-
3.3.7 crack filler—a material that is placed in a pavement
mance of the protective coating system when applied over
crack or joint to fill but not necessarily seal the void created by
bituminous concrete pavements.
the crack or joint.
5. Materials
3.3.8 crack sealant—a material that has adhesive and cohe-
5.1 Refined Coal Tar Emulsion (Seal Coating) Mixture—A
sive properties to seal cracks, joints or other narrow openings
mixture of concentrated refined coal tar emulsion water and
(less than 38.5 mm [1- ⁄2 in.] wide) in pavements against the
sand, with or without an additive, as specified in Specification
entrance or passage of water or other debris.
D6945/D6945M.
3.3.9 crude coal tar—condensed material taken from the
coking process (high temperature heating of coal under a 5.2 Crack Sealant—As specified by the refined coal tar
emulsion manufacturer.
vacuum) and containing all of the volatile constituents.
3.3.10 cure, final (of the seal coat)—the process of evapo- 5.3 Oil Spot Primer—As specified by the refined coal tar
ration of water and volatiles of the applied seal coating mixture emulsion manufacturer.
over the period of days resulting in the coating reaching its
5.4 Pavement Primer—As specified by the refined coal tar
ultimate strength. The duration of this process is dependent
emulsion manufacturer.
upon ambient conditions.
6. Equipment
3.3.11 cure, initial (of the seal coat)—the condition of an
applied seal coating material that enables it to withstand 6.1 Use application equipment that is capable of applying
the required coating rates evenly over the entire width of the
vehicle traffic without damage to the seal coat.
application mechanism to provide a continuously coated sur-
3.3.12 drying (of the seal coat)—the process of evaporation
face. For spray units, this can be accomplished with either a
of water of the applied seal coating mixture resulting in the
spray bar or a wand-type application device. To ensure this,
coating being able to sustain light foot traffic.
equip all spray units with a pumping distribution system using
3.3.13 mechanized application equipment—equipment used
positive displacement pumps.All squeegee/brush units shall be
to mix and apply the refined coal tar emulsion mixture either
properly adjusted and in condition for application of seal coat
with a spray or squeegee unit.
materials so that there are no streaks in the coating.
3.3.14 priming—application of an initial coat of a material
6.2 Bulk storage tanks shall be capable of mixing or
designed to assist the adhesion of the additional coats of seal
circulating, or both, the coat tar emulsion to a uniform
coating materials. Primers are always used as under coatings
consistency.
and are not designed to be used by themselves.
6.3 The mixing part of the application equipment must be
3.3.15 refined coal tar—a selectively distilled coal tar meet-
tank type with a mechanically powered, full sweep mixer
ing the requirements of Specification D490, grade RT-12.
capable of homogeneously mixing the entire contents of the
3.3.16 refined coal tar emulsion—astableandhomogeneous
tank.
dispersion of refined coal tar, clay, mineral fillers, and specialty
6.4 Use of hand squeegee or brush application will be
chemicals in water.
restricted to places not accessible to mechanized equipment, or
3.3.17 seal coating—process of applying a protective coat- to accommodate neat trim work at curbs and so forth. Material
ing to a bituminous concrete pavement.
that is applied by hand application shall meet the same
standards as that applied by machine.
3.3.18 spray unit—a piece of
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
´1
Designation: D6948/D6948M − 03 (Reapproved 2011) D6948/D6948M − 03 (Reapproved
2017)
Standard Practice for
Application of Refined Coal Tar (Ready to Use, Commercial
Grade)
This standard is issued under the fixed designation D6948/D6948M; 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.
ε NOTE—Units information was editorially revised in June 2011.
1. Scope
1.1 This practice covers the application of emulsified refined coal tar slurry meeting the requirements of Specification
D6945D6945/D6945M Types I and II, by mechanized equipment as a weather protection and petroleum (aliphatic) solvent
resistant sealer for use on bituminous concrete pavements. In order to clarify the differences between Types I and II, see 3.3 for
standard definition of terms.
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 and health 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.
2. Referenced Documents
2.1 ASTM Standards:
D490 Specification for Road Tar
D5727D5727/D5727M Specification for Emulsified Refined Coal Tar (Mineral Colloid Type)
D6945D6945/D6945M Specification for Emulsified Refined Coal-Tar (Ready to Use, Commercial Grade)
3. Terminology
3.1 Two types of mixtures are defined in Specification D6945D6945/D6945M. The ingredients for both types of mixtures are
normally combined at the contractor’s yard or at the job site. Refined coal tar emulsion meeting Specification D5727D5727/
D5727M is concentrated when shipped from the manufacturer to the applicator.
3.1.1 Specification D6945D6945/D6945M Type I material—is Specification D5727D5727/D5727M material diluted with water
typically by the applicator after which aggregate is added.
3.1.2 Specification D6945D6945/D6945M Type II material—is Specification D5727D5727/D5727M material diluted with water
typically by the applicator after which additive and aggregate is added.
3.2 The mixtures described in 3.1.1 and 3.1.2 can be submitted to a laboratory approved by the owner for testing of their
conformance to Specification D6945D6945/D6945M Type I or Type II prior to their actual use on the job.
3.3 Definitions:
This practice is under the jurisdiction of ASTM Committee D08 on Roofing and Waterproofing and is the direct responsibility of Subcommittee D08.09 on Bituminous
Emulsions.
Current edition approved May 1, 2011May 1, 2017. Published June 2011May 2017. Originally approved in 2003. Last previous edition approved in 20032011 as
ɛ1
D2948 – 03.D6948/D6948M – 03 (2011) . DOI: 10.1520/D6948_D6948M-03R11E01.10.1520/D6948_D6948M-03R17.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D6948/D6948M − 03 (2017)
3.3.1 additive—one or more ingredients that can be added to a specific refined coal tar emulsion, water, or sand (or combination
thereof) mixture to improve the coatings’ durability, fuel resistance, drying time, color uniformity, or length of time required before
opening the surface to traffic, or combination thereof. This material can also be used to modify the wet mixture’s viscosity to
improve aggregate suspension. Because there is such a wide variance of additives on the market, the aforementioned results may
not take place. If an additive is used, it is recommended that it be supplied by the same manufacturer as the refined coal tar
emulsion.
3.3.2 application rate—the volume of mixed materials applied per area of pavement surface, usually expressed in liters per
2 2
square meter (l/m(L/m ) [gallons per square yard (gal/yd )].
3.3.3 applied mixture—the combination of all ingredients mixed together and ready for application to the pavement. Also
referred to as seal coat or sealer.
3.3.4 bituminous concrete pavements, new—pavements that have been placed less than 90 days.
3.3.5 bituminous concrete pavements, aged—pavements that weathered over at least one summer season and have shown signs
of one or more of the following: cracking, raveling, aggregate polishing or graying due to oxidation, or combination thereof.
3.3.6 brush applicator—a hand type or mechanized brush used to apply pavement sealer.
3.3.7 crack filler—a material that is placed in a pavement crack or joint to fill but not necessarily seal the void created by the
crack or joint.
3.3.8 crack sealant—a material that has adhesive and cohesive properties to seal cracks, joints or other narrow openings (less
than 38.5 mm [1- ⁄2 in.] wide) in pavements against the entrance or passage of water or other debris.
3.3.9 crude coal tar—condensed material taken from the coking process (high temperature heating of coal under a vacuum) and
containing all of the volatile constituents.
3.3.10 cure, final (of the seal coat)—the process of evaporation of water and volatiles of the applied seal coating mixture over
the period of days resulting in the coating reaching its ultimate strength. The duration of this process is dependent upon ambient
conditions.
3.3.11 cure, initial (of the seal coat)—the condition of an applied seal coating material that enables it to withstand vehicle traffic
without damage to the seal coat.
3.3.12 drying (of the seal coat)—the process of evaporation of water of the applied seal coating mixture resulting in the coating
being able to sustain light foot traffic.
3.3.13 mechanized application equipment—equipment used to mix and apply the refined coal tar emulsion mixture either with
a spray or squeegee unit.
3.3.14 priming—application of an initial coat of a material designed to assist the adhesion of the additional coats of seal coating
materials. Primers are always used as under coatings and are not designed to be used by themselves.
3.3.15 refined coal tar—a selectively distilled coal tar meeting the requirements of Specification D490, grade RT-12.
3.3.16 refined coal tar emulsion—a stable and homogeneous dispersion of refined coal tar, clay, mineral fillers, and specialty
chemicals in water.
3.3.17 seal coating—process of applying a protective coating to a bituminous concrete pavement.
3.3.18 spray unit—a piece of equipment equipped with a mixing tank and positive displacement pump that can homogeneously
mix and apply protective coatings uniformly over the entire width of a spray bar or wand type application device.
3.3.19 squeegee unit—a piece of equipment equipped with a mixing tank and squeegeeing mechanism that can homogeneously
mix and apply protective coatings uniformly over the entire width of a rubber squeegee or brush type application device.
3.3.20 traffıcability—the ability of an applied seal coating material to withstand vehicle traffic without damage to the seal coat,
except for wear from traffic.
3.3.21 uniform coated surface—a surface that has an even distribution of seal coating material free of pinholes, streaks, or other
uneven characteristics, or combination thereof.
4. Significance and Use
4.1 This practice is designed as a guide for architects, engineers, property owners or their representatives, or combination
thereof. Its use helps ensure the satisfactory performance of the protective coating system when applied over bituminous concrete
pavements.
5. Materials
5.1 Refined Coal Tar Emulsion (Seal Coating) Mixture—A mixture of concentrated refined coal tar emulsion water and sand,
with or without an additive, as specified in Specification D6945D6945/D6945M.
5.2 Crack Sealant—As specified by the refined coal tar emulsion manufacturer.
D6948/D6948M − 03 (2017)
5.3 Oil Spot Primer—As specified by the refined coal tar emulsion manufacturer.
5.4 Pavement Primer—As specified by the refined coal tar emulsion manufacturer.
6. Equipment
6.1 Use application equipment that is capable of applying the required coating rates evenly over the entire width of the
application mechanism to provide a continuously coated surface. For spray units, this can be accomplished with either a spray
...