ASTM D450/D450M-07 (R2018) PDF Download

The ASTM D450/D450M-07 (R2018) standard provides guidelines for the testing and physical requirements of two types of coal-tar pitch. It specifies that the coal-tar pitch should be used in the construction of built-up roofing, dampproofing, and membrane waterproofing systems.

The coal-tar pitch used should be prepared from selected crudes using appropriate refining processes. It should be homogeneous and free of water. The standard specifies various properties that the coal-tar pitch should conform to, including water content, specific gravity, ring-and-ball softening point, Cleveland open cup flash point, solubility in carbon disulfide, ash content, and distillation (total distillates and residue).

This standard is important in ensuring that the coal-tar pitch used in roofing, dampproofing, and waterproofing systems meets the necessary quality requirements. It helps to ensure that the material is suitable for its intended use and can provide the necessary protection and durability in these applications.