AASHTO T 211-90 (2021) PDF Download

The AASHTO T 211-90 (2021) standard is entitled "Standard Method of Test for Determination of Cement Content in Cement-Treated Aggregate by the Method of Titration". This method provides a procedure for determining the cement content in cement-treated aggregate. The measurement is based on the continuous neutralization of an aqueous solution from the cement-treated aggregate specimen over a specified time period.

The process involves adding acid to the solution until it reaches a point where the hydroxide ions (OH-) produced during the cement hydration are neutralized. The quantity of acid used is directly proportional to the cement content of the treated base sample.

This standard establishes a reliable and repeatable method for determining the cement content in cement-treated aggregates. The titration method ensures accurate measurements and allows for the evaluation of the effectiveness of the cement treatment.