ASTM D3423/D3423M-15(2023)

Standard Practice for Application of Emulsified Coal-Tar Pitch (Mineral Colloid Type)

ABSTRACT
This practice covers the application of mineral-colloid-stabilized, emulsified coal-tar pitch, as a weather protection and aliphatic-solvent-resistant sealer for use on bituminous pavements of airports, parking lots, and driveways. The procedure for preparation of (1) old asphalt surfaces, (2) new asphalt surfaces, and (3) emulsion, and the procedure for application of emulsion for the first coat and second coat are detailed. When sand addition to the top coat of the emulsion is necessary, the sand shall meet the prescribed sieve size requirements. Application precautions including weather conditions, pavement and air temperatures, drying time, and emulsion freezing are also provided.
SCOPE
1.1 This practice covers the application of mineral-colloid-stabilized, emulsified coal-tar pitch meeting the requirements of Specification D5727/D5727M, as a weather protection and aliphatic-solvent-resistant sealer for use on bituminous pavements of airports, parking lots, and driveways.  
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 nonconformance 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: 31-May-2023
• ICS: 91.100.50 - Binders. Sealing materials
• Technical Committee: D08 - Roofing and Waterproofing
• Drafting Committee: D08.09 - Liquid Applied Coatings for Roofing and Asphaltic Concrete Pavement

Relations

• Refers: ASTM D5727/D5727M-00(2011)e1 - Standard Specification for Emulsified Refined Coal Tar (Mineral Colloid Type)
• Effective Date: 01-May-2011

Overview

ASTM D3423/D3423M-15(2023) is an internationally recognized standard published by ASTM International that outlines best practices for the application of mineral-colloid-stabilized, emulsified coal-tar pitch. This practice is designed to enhance weather protection and provide resistance to aliphatic solvents when sealing bituminous (asphalt) pavements. Common applications include the maintenance of surfaces such as airports, parking lots, and driveways. The standard details procedures for surface preparation, emulsion application, sand addition for traction, and critical application precautions to ensure optimal performance and durability.

Key Topics

• Surface Preparation:

  • Outlines steps for both old and new asphalt surfaces.
  • Instructions for repairing and patching defects, filling cracks, removing contaminants, and priming oxidized or damaged areas.
  • Emphasizes the importance of a clean, defect-free, and properly aged pavement before sealer application.

• Emulsion Preparation:

  • Ensures the emulsified coal-tar pitch is mixed to a uniform consistency prior to use.
  • Specifies that no dilution is typically required unless recommended by the manufacturer.
  • Guidance provided for the incorporation of sand to improve traction, including acceptable sieve sizes for sand particles.

• Application Process:

  • Procedures for applying a first and second coat, including allowable dilution and recommended application tools such as brushes, squeegees, or sprayers.
  • Drying and curing times between coats to ensure proper adhesion and durability.
  • Instructions for adding sand to the top coat when additional slip resistance is desired.

• Application Precautions:

  • Limitations on application during rain or when rain is expected within 8 hours.
  • Minimum temperature requirements for both air and pavement to ensure successful curing.
  • Recommendations for protecting the emulsion from freezing and ensuring adequate drying time between coats.

Applications

ASTM D3423/D3423M-15(2023) is essential for:

• Airport Runway and Taxiway Maintenance: Extends pavement life and provides a resilient seal against fuel spills and harsh weather.
• Parking Lots: Enhances resistance to automotive fluids and weathering, reducing maintenance costs.
• Driveways: Provides a durable, weather-resistant surface with improved slip resistance when sand is included in the top coat.
• Roadway Pavement Renewal: Suitable for any bituminous pavement requiring increased protection from environmental and chemical exposure.

Implementing this standard helps ensure pavement surfaces receive a consistent, high-quality treatment that extends their usable lifespan and reduces the need for frequent repairs.

Related Standards

• ASTM D5727/D5727M: Specification for Emulsified Refined Coal Tar (Mineral Colloid Type), referenced as the material requirement for emulsions used.
• Other ASTM Pavement and Roofing Standards: Including standards for surface preparation, crack filling, and cold-applied patching materials.
• International Standards for Bituminous Pavement Protection: Such as ISO guidelines or local standards addressing similar surface treatment applications.

Adhering to ASTM D3423/D3423M-15(2023) ensures compatibility with global best practices in pavement sealing, facilitating regulatory compliance and uniform performance across a range of infrastructure projects.

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: D3423/D3423M − 15 (Reapproved 2023)
Standard Practice for
Application of Emulsified Coal-Tar Pitch (Mineral Colloid
Type)
This standard is issued under the fixed designation D3423/D3423M; 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 3.1.1 Repair and patch all pavement defects. If a solvent
containing cold-applied material is used, this should be done a
1.1 This practice covers the application of mineral-colloid-
minimum of 90 days prior to the planned application of the
stabilized, emulsified coal-tar pitch meeting the requirements
sealer to permit solvent escape before sealing.
of Specification D5727/D5727M, as a weather protection and
3.1.2 Thoroughly inspect the pavement surface for minor
aliphatic-solvent-resistant sealer for use on bituminous pave-
cracks or other imperfections. Ignore hairline cracks. Open
ments of airports, parking lots, and driveways.
minor cracks (less than 12.7 mm [ ⁄2 in.]) to a minimum depth
1.2 The values stated in either SI units or inch-pound units
and width of 12.7 mm and fill with a crack filler approved by
are to be regarded separately as standard. The values stated in
the manufacturer of the sealer. Wider cracks, along with soft or
each system may not be exact equivalents; therefore, each
sunken spots, indicate that the pavement or the pavement base
system shall be used independently of the other. Combining
should be repaired or replaced.
values from the two systems may result in nonconformance
3.1.3 Treat old, badly oxidized asphalt pavement or asphalt
with the standard.
pavement that has lost binder by erosion leaving exposed
1.3 This standard does not purport to address all of the
aggregate with a prime coat recommended by the sealer
safety concerns, if any, associated with its use. It is the
manufacturer after all loose aggregate is removed. This prime
responsibility of the user of this standard to establish appro-
coat is to dry thoroughly before proceeding.
priate safety, health, and environmental practices and deter-
3.1.4 Immediately prior to application of the sealer, clean
mine the applicability of regulatory limitations prior to use.
the surface of all loose dust, dirt, leaves, and other foreign
1.4 This international standard was developed in accor-
materials by sweeping, by flushing well with water, or a
dance with internationally recognized principles on standard-
combination of both.
ization established in the Decision on Principles for the
3.1.5 Remove oil or grease that has not penetrated the
Development of International Standards, Guides and Recom-
asphalt pavement by scrubbing with a detergent until a water-
mendations issued by the World Trade Organization Technical
break-free surface is obtained after thorough flushing with
Barriers to Trade (TBT) Committee.
clear water. If cleaning is unable to produce a true “water-
break-free” surface, and the size of the unsatisfactory area is
2. Referenced Documents
too small to warrant replacement as described in 3.1.1, the
2.1 ASTM Standards:
questionable area should be treated with a spot sealer as per the
D5727/D5727M Specification for Emulsified Refined Coal
pavement sealer manufacturer’s recommendation. Do not use
Tar (Mineral Colloid Type)
only solvents to remove oil or grease as the solvents may affect
adhesion of the sealer.
3. Preparation of Surface
3.1.6 Remove and patch pavement that has been penetrated
3.1 Old Asphalt Surfaces (those which have weathered over
by oil and grease in accordance with the precautions described
a change of seasons):
in 3.1.1 if a cold patch is required.
3.1.7 Treat old parking and traffic control lines with a prime
coat. If control lines are excessively built up from multiple
This practice is under the jurisdiction of ASTM Committee D08 on Roofing and
applications, abrade to the pavement surface before application
Waterproofing and is the direct responsibility of Subcommittee D08.09 on Liquid
of the prime coat.
Applied Coatings for Roofing and Asphaltic Concrete Pavement.
Current edition approved June 1, 2023. Published June 2023. Originally
3.2 New Asphalt Surfaces:
approved in 1975. Last previous edition approved in 2015 as D3423/D3423M – 15.
DOI: 10.1520/D3423_D3423M-15R23.
3.2.1 Allow conventional hot-mix asphalt surfaces to age a
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
minimum of 30 days prior to the application of the sealer.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3.2.2 Before application of sealer over a pavement con-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. structed by the use of solvent-containing cold-mix asphalt, age
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D3423/D3423M − 1
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