AASHTO M 303-89 (2023)

This specification covers two types of lime to be used for reducing water susceptibility in asphalt mixtures.

• Type I—High calcium-hydrated lime containing maximum magnesium content, calculated as magnesium oxide, of 4 percent by mass. Compliance with chemical composition requirements shall be determined by use of AASHTO T 219.
  • Note—Magnesium oxide content may be determined by ASTM C25.
• Type II—Magnesium or dolomitic lime containing magnesium, calculated as magnesium oxide, greater than 4 percent but no more than 36 percent by mass. Compliance with chemical composition requirements shall be determined by use of ASTM C25.
  • Note—Except that Section 2, “Samples for Analysis,” is excluded.