AASHTO T44:2014 Standard Method of Test for Solubility of Bituminous Materials.
SOLVENT
Technical grade, Type I. tricholorethylene or technical grade 1,1,1 tricholorethane.
SAFETY PRECAUTIONS
Trichioroethylene and I , I , I trichioroethane are toxic materials and strict adherence to instructions in Material Safety Data Sheets are to be followed. Caution: Trichioroethylene and 1,1,1 trichloroethane in the presence of heat and moisture may form acids that are extremely corrosive.
PREPARATION OF GOOCH CRUCIBLE
Assemble the filtering apparatus as shown in Figure 1. Place filter pad into the Gooch crucible. moisten the pad with solvent, and seat firmly in the bottom of the crucible with light suction. Dry the crucible and contents at 110 ± 5°C (230 ± 9°F) for at least 20 mm. Cool the crucible and contents in a desiccator for at least 20 mn and determine the mass. Repeat this procedure until constant mass (±0.3 mg) is obtained. Store in a desiccator until ready for use.
SAMPLE PREPARATION
If the sample is not fluid, heat the sample with care to prevent local overheating until it has become sufficiently fluid to pour, occasionally stirring the sample to aid heat transfer and to assure uniformity. Avoid the entrapment of air.
9. PROCEDURE
9.1. Note safety precautions in Section 6. Transfer approximately 2 g of the sample into a tared I 25-rnL Erlenmeyer flask or other suitable container. Allow the container and its contents to cool to ambient temperatures and determine the mass to the nearest I mg. Add 100 mL of the trichioroethylene or 1 1,1 trichloroethane to the container, stopper flask and agitate as necessary until the sample is dissolved and no undissolved material adheres to the container.
Normally the temperature at which this test is run is not critical, and it may be performed at the laboratory air temperature. For referee tests, however, the tiask and sample in solution shall be placed in a water bath maintained at 37.8 ± 0.25°C (100 ± 0.5°F) for I h before filtering.
9.2. Place the previously prepared and tared Gooch crucible in the filtering tube.
Wet the filter pad with a small portion of clean solvent and decant the solution through the filter pad of the crucible with light suction.
When the insoluble matter is appreciable, retain as much of it as possible in the container until the solution has drained through the filter pad. If the filter paper becomes clogged with insoluble material and the solution cannot drain through, the use of additional crucibles is permitted, provided they are conditioned as described in Section 7.1. Wash the container with a small amount of solvent and, using a stream of solvent from a wash bottle, transfer all insoluble matter to the crucible. Use a “policeman” if necessary to remove any insoluble matter adhering to the container, rinse the policeman and the container, thoroughly wash the insoluble matter in the crucible with solvent until the filtrate is substantially colorless, then apply strong suction to remove the remaining solvent. Remove the crucible from the tube and wash the bottom free of any dissolved matter. Dry the crucible and contents at 110 ± 5°C (230 ± 9°F) for at least 20 mm. Cool the crucible and contents in a desiccator for at least 20 mm and determine the mass. Repeat this procedure until constant mass (±0.3 rng) is obtained.
Fiberglass filter pads should be used only one time.AASHTO T44 pdf download.