[CivilEA Exclusive] ACI 225.2: Type IL Cements and Specification

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ACI PRC-225.2-25: Type IL Cements and Specifications—TechNote

Author(s)/Editor(s): ACI Committee 225| Format: PDF| Quality: Scanner| Year: 2025| pages: 4

Type IL (pronounced “one-el”) portland-limestone cements were introduced in ASTM C595/C595M and AASHTO M 240 standard specifications for blended cements in 2012. These cements contain between 5 and 15% limestone, compared to the 5% maximum limestone content of ASTM C150/AASHTO M 85 portland cements. Type IL cements perform comparably to portland cements and do so with up to 10% lower CO2 emissions per ton of cement. Although portland-limestone cements have been available in other parts of the world, the availability and adoption of these cements in practice have only recently become widespread in the United States (as of 2022) (Schexnayder 2022). Many specifiers may have limited experience in incorporating these cements into project specifications.

Keywords:

heat of hydration; high early strength; low-carbon concrete; mixture design; portland-limestone cements; specifications; sulfate resistance.

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