AASHTO T211 – Standard Method of Test for Determination of Cement Content in Cement-Treated Aggregate by the Method of Titration
This method of test covers a procedure for determining cement content based on the continuous neutralization of an aqueous solution from the cement-treated aggregate specimen for a specified time period.
This is accomplished by adding sufficient acid to just neutralize the OH-ion that is continuously being liberated during the hydration of the cement. The amount of acid used is directly proportional to the cement content of the treated base sample.
cement content; cement-treated aggregate; phenolphthalein