Test Method for Measurement of Micro-Surfacing System Cohesion
Method to classify emulsified asphalt/aggregate mixture systems using a modified cohesion tester and the measurement of set and cure characteristics; Modified Cohesion Tester is used to measure cohesion of the mixture at suitable time intervals such as 30, 60, 90, 150, 210, and 270 minutes after casting. To do this, a torque wrench is used to measure the torque required to rotate neoprene cylinder in contact with the specimen. Set time is defined as the elapsed time after casting when a slurry system may not be remixed into homogenous slurry. A plot of torque versus time is developed based on modified cohesion test results to classify the system in terms of set time and traffic time.