AASHTO T59:2013 Standard Method of Test for Emulsified Asphalts.
4.2. Significance and Use:
4.2.1. This test method measures the amount of water present in the emulsified asphalt, as distinguished from either asphalt material or petroleum solvent.
4.3. Apparatus and Materials:
4.3.1. Metal Distillation Pot—The metal distillation pot [Figure 1(a)] shall be a vertical cylindrical vessel, preferably made of copper, having a faced flange at the top to which the head is tightly attached by means of a clamp. The head shall be made of metal, preferably brass or copper, and shall be provided with a tubulation 25.4 mm (I in.) in inside diameter.
4.3.2. Glass Distillation Pot—The glass distillation pot [Figure 1(b)] shall be a short-neck, round-bottom flask, made of well-annealed glass, and having an approximate capacity of 500 mL.
4.3.3. Heat Source—The heat source used with the metal distillation pot shall be a ring gas burner of
100-mm (4-in.) inside diameter or an electric mantle heater. The heat source for the glass distillation pot shall be either an ordinary gas burner or electric heater.
4.3.4. condenser—The condenser shall be a water-cooled, retlux glass-tube type, having a jacket not less than 400 mm (l5/4 in.) in length, with an inner tube 9.5 to 12.7 mm (31K to ‘2 in.) in outside diameter. The end of the condenser shall be ground to an angle of 30 ± 50 from the vertical axis of the condenser.
4.3.5. Trap—The trap shall be made of annealed glass constructed in accordance with Figure 1(c) and graduated in 0.10-mL divisions from 0 to 2 rnL and in 0.20-rnL divisions from 2 to 25 rnL.
4.3.6. Solvent—Xylol or other petroleum distillate conforming to the following distillation requirements:
98 percent distills between 120 and 250°C (248 and 482°F). This distillation shall be conducted in accordance with ASTM D 86.
4.3.7. Balance—Conforming to the requirements of M 23 1, Class (1 2.
4.4. Sample:
4.4.1. Obtain a representative sample of the material as specified in T 40.
Note 1—The difficulties in obtaining representative samples tbr this determination are unusually great, so the importance of proper sampling cannot be too strongly emphasized.
4.5. Procedure:
4.5.1. When the material to be tested contains 25 percent or less water, place 100 ± 0.1 g of the sample in the distillation pot. When the material contains more than 25 percent water. use a 50 ± 0.1 -g sample. Thoroughly mix the sample to be tested with 200 mL of solvent by swirling, taking proper care to avoid any loss of material.AASHTO T59 pdf download.