本规范涵盖了两种用于降低沥青混合料水敏感性的石灰。I型——高钙熟石灰，含最大镁含量，以氧化镁计算，质量分数为4%。应使用T 219（注1）确定是否符合化学成分要求。II类-含镁的镁或白云质石灰，按氧化镁计算，质量大于4%，但不超过36%。应使用ASTM C 25（注2）确定是否符合化学成分要求。注1:氧化镁含量可通过ASTM C 25测定。注2:第2节“分析样品”除外。

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.