ASTM D8531-23 PDF

Overview

ASTM D8531-23: Standard Specification for Latex-Based Pavement Sealers Containing Mineral Aggregates establishes requirements for water-based latex polymer mixtures with mineral aggregates and optional admixtures. Designed for weather-protective and aliphatic hydrocarbon-resistant coatings, this standard applies to both asphalt and other pavement surfaces. The specification covers two types of sealers:

• Class 1: Standard version, typically black (may vary in color)
• Class 2: Solar reflective version for increased sustainability

This international ASTM standard supports the use of latex-based pavement sealers to improve pavement durability, resistance, and sustainability while aligning with global trade and quality requirements.

Key Topics

• Scope and Coverage: Includes performances of coatings made from water-based latex polymer emulsion, reinforced with mineral aggregates (such as silica sand or slate), and optional additives for enhanced properties.
• Performance Requirements: Specifies necessary physical and chemical characteristics of both liquid and cured sealers, such as:
  • Viscosity
  • Weight solids content
  • VOC emissions (Volatile Organic Compounds)
  • Shore A hardness
  • Flexibility and resistance to hydrocarbons and water
  • Drying and curing times
  • Solar reflectance (notably for Class 2, with a minimum reflectance index)
• Application Guidance: Details proper application forms (spray, brush, squeegee) and environmental conditions for best results.
• Material Identification and Sampling: Outlines packaging markings for traceability, sampling practices, and quality control measures.
• Safety and Environmental Considerations: Notes that users must address all safety, health, and environmental aspects, ensuring compliance with relevant regulations.

Applications

Latex-based pavement sealers formulated according to ASTM D8531-23 are widely used in a range of settings to enhance the durability and longevity of paved surfaces. Common applications include:

• Roads and Highways: Protection against weathering and chemical attack, slowing pavement deterioration.
• Parking Lots and Driveways: Resistance to fuel and oil spills, reduction of cracks and surface degradation.
• Airport Runways and Taxiways: Protection against jet fuel, gasoline, and other hydrocarbons.
• Industrial and Commercial Pavements: Suitable for areas exposed to heavy traffic and chemical exposure.

The inclusion of mineral aggregates in the sealer improves slip and skid resistance, while the use of water-based latex polymers reduces VOC emissions and environmental impact. Solar reflective variants (Class 2) support urban heat island mitigation by improving reflective properties, making them especially suitable for sustainable infrastructure projects.

Related Standards

Several ASTM standards are referenced within ASTM D8531-23 or provide complementary requirements, including:

• ASTM D8: Terminology Relating to Materials for Roads and Pavements
• ASTM D522/D522M: Mandrel Bend Test of Attached Organic Coatings
• ASTM D562: Consistency of Paints Measuring Krebs Unit (KU) Viscosity
• ASTM D1644: Nonvolatile Content of Varnishes
• ASTM D2196: Rheological Properties of Non-Newtonian Materials by Rotational Viscometer
• ASTM D2240: Rubber Property - Durometer Hardness
• ASTM D2939: Emulsified Bitumens Used as Protective Coatings
• ASTM D6886: Determination of VOC in Waterborne Air-Dry Coatings
• ASTM E1980: Practice for Calculating Solar Reflectance Index

By adhering to ASTM D8531-23, users can ensure that latex-based pavement sealers deliver reliable, high-performance protection with clear specifications for composition, testing, and application, supporting safe, sustainable, and resilient infrastructure.