AASHTO TP 102:2016 Standard Method of Test for Evaluation of Asphalt Release Agents (ARAs).
3.1 .1. In the Asphalt Stripping Test, a sample of HMA is soaked in the ARA for seven days, alongside a control sample of ARA with no HMA. The samples arc evaluated at the end of the soak period to determine the degree of stripping that occurred. Gravimetric weights are also taken and calculated to determine weight loss.
3.1.2. In the Mixture Slide Test, a sample of HMA is applied to a steel plate that has been treated with the ARA. The plate is tilted to allow the HMA to slide free. The amount of retained hot mix is recorded for each application cycle. This process is repeated two more times. The degree of adhesion to the metal plate is determined by gain in weight.
3.1.3. In the Asphalt Performance Test, hot asphalt binder is poured onto the same treated metal plate used in Section 3.1 .2, allowed to cool, and then pulled away. The amount of retained binder is recorded for each application cycle. This process is repeated until a minimum of 10 percent of the asphalt binder has adhered to the metal plate. The degree of adhesion to the metal plate is determined by gain in weight.
3.2. The flash point, infrared spectrum (FTIR), percent solids, specific gravity, and pH of the ARA are measured and recorded.
SIGNIFICANCE AND USE
The Asphalt Stripping Test measures the tendency for the ARA to alter the asphalt binder or remove asphalt binder from the IIMA. The agent is evaluated in both its concentrated, non-diluted strength form and at the dilution ratio recommended for use by the manufacturer.
4.2. The Mixture Slide Test simulates a metal truck bed to determine the tendency of the HMA to adhere to the metal bed when the ARA is used.
4.3. The Asphalt Performance Test measures the tendency for asphalt binder to adhere to metal on truck beds, payers, rollers, slat elevators, or tools when the ARA is used.
4.4. The HMA used for testing is made under Superpave mix design standards to provide an HMA with repeatable behavior that will not tend to exhibit stripping when exposed to water.
4.5. The flash point will be used to determine product safety. The infrared spectrum (FTIR), percent solids, specific gravity, and pH are intended to be used as reference parameters to verify product formulations of future samples.
4.6. This method is intended to determine the properties of these materials. Acceptability of a material, based upon the data generated as a result of the testing and evaluation in this practice, is the responsibility of the user.
4.7. Standard laboratory conditions are defined as a temperature of 25 ± 4°C (77 7°F).AASHTO TP 102 pdf download.