AASHTO M 85-21 PDF Download

The AASHTO M 85-21 standard outlines the requirements and properties for ten different types of portland cement. Each type is designed for specific uses and has unique characteristics.

Type I is a general-purpose cement used when no special properties are required. Type IA is an air-entraining cement used for the same purposes as Type I, but with the addition of air entrainment.

Type II is a cement suitable for general use, especially when moderate sulfate resistance is needed. Type IIA is an air-entraining cement with the same uses as Type II but with air entrainment properties.

Type II(MH) is a cement used for general purposes, particularly when moderate heat of hydration and moderate sulfate resistance are desired. Type II(MH)A is an air-entraining cement used for the same purposes as Type II(MH), but with air entrainment.

Type III is a cement used when high early strength is required. Type IIIA is an air-entraining cement with the same uses as Type III but with air entrainment properties.

Type IV is a cement used when low heat of hydration is desired. Type V is a cement used when high sulfate resistance is required.