ASTM D5727/D5727M-00(2023) PDF

Overview

ASTM D5727/D5727M-00(2023): Standard Specification for Emulsified Refined Coal Tar (Mineral Colloid Type) establishes requirements for mineral-colloid-stabilized, concentrated emulsified refined coal tar. This material is primarily used as a weather-protective and aliphatic-solvent resistant coating over bituminous pavements, such as those found in airports, parking lots, and driveways. The standard details physical property requirements, testing methods, and packaging to ensure product performance and consistent quality in a variety of demanding conditions.

Key Topics

• Compliance and Homogeneity: The emulsion must remain homogeneous and should not separate or coagulate beyond what can be remedied by moderate stirring.
• Physical Property Requirements: The specification includes detailed requirements for the following:
  • Uniformity
  • Wet film continuity
  • Resistance to freezing (when specified)
  • Density at 25 °C
  • Residue by evaporation
  • Water content
  • Resistance to volatilization and residue weight loss
  • Solubility of residue in carbon disulfide
  • Ash content of residue
  • Drying time to firm set
  • Resistance to heat, kerosene, and water
  • Flexibility across temperature and exposure variations
• Testing and Sampling: Applications of this standard require that samples are taken and tested in accordance with referenced ASTM methods, such as D140/D140M for sampling and D2939 for emulsified bitumen tests.
• Unit Systems: The standard permits the use of either SI or inch-pound units, but systems must not be mixed to avoid nonconformance.

Applications

The ASTM D5727/D5727M specification is widely used in the construction and maintenance of bituminous pavement surfaces where durability, weather protection, and chemical resistance are essential. Typical applications include:

• Airport Runways and Taxiways: Ensuring surface protection against fuel and weather exposure.
• Parking Lots and Driveways: Extending the life of asphalt surfaces and preventing damage from water and aliphatic solvents.
• Commercial and Municipal Pavement Maintenance: Supporting long-term asset value and reducing maintenance frequency due to enhanced resistance to weathering, solvents, and freeze-thaw cycles.

For field applications, the emulsion is diluted appropriately after quality testing, following guidelines specified in Practice D3423/D3423M, to meet the specific needs of each project.

Related Standards

This standard references several related documents and standards, which provide additional guidance and testing protocols:

• ASTM D95: Test Method for Water in Petroleum Products and Bituminous Materials by Distillation
• ASTM D140/D140M: Practice for Sampling Asphalt Materials
• ASTM D490: Specification for Road Tar
• ASTM D3423/D3423M: Practice for Application of Emulsified Coal-Tar Pitch (Mineral Colloid Type)
• Federal Specification RP355: Previously covered materials now included in D5727/D5727M

Practical Value

Using emulsified refined coal tar products that comply with ASTM D5727/D5727M ensures a consistent, reliable coating performance for contractors, engineers, and facility managers. Benefits of compliance include:

• Extended Pavement Lifespan: Enhances weather resistance and protects against chemical damage.
• Standardized Quality Control: Ensures materials meet strict performance metrics before application.
• Versatility: Suitable for a wide range of surface types and environmental conditions.
• Regulatory Confidence: Recognized by agencies including the U.S. Department of Defense for use on high-value assets.

Keywords

emulsified refined coal tar, mineral colloid, ASTM D5727, bituminous pavement coating, weather-protective, aliphatic-solvent resistant, pavement preservation, airport surface maintenance, ASTM standards.