AASHTO T 185-15 (2020) PDF Download

AASHTO T 185-15 (2020) is a standard method of test that specifically focuses on the early stiffening properties of hydraulic cement using the mortar method. The purpose of this standard is to determine the time at which a cement mortar mixture begins to lose its workability and exhibits initial stiffening.

This method involves preparing a cement mortar mixture and measuring the consistency and setting time at various intervals. The consistency is determined by measuring the penetration resistance of the mortar using a penetrometer at specified time intervals. The setting time is determined by monitoring the increase in penetration resistance and determining the time at which the mortar reaches a specified level.

The standard provides detailed procedures and guidelines for preparing the mortar mixture, conducting the test, and recording the results. It also specifies the necessary equipment and instruments required for conducting the test, such as the penetrometer and a timer.