This test method is a measure of the solubility of asphalt in trichloroethylene. The portion that is soluble in trichloroethylene represents the active cementing constituents.

The assembly of the filtering apparatus is illustrated Details of the component parts are as follows:

1. Bitumen Crucible or Gooch Crucible, glazed insideand outside with the exception of outside bottom surface. Theapproximate dimensions shall be a diameter of 44 mm at thetop, tapering to 36 mm at the bottom, and a depth of 20-30 mm.

2. Glass Microfiber Filter Pad  , 32–34 mm diameter, fineporosity, fast flow rate, 1.5 µm particle retention.

3. Filter Flask , heavy-wall, with side tube, 250- or500-mL capacity

4. Filter Tube, 40- to 42-mm inside diameter.

5. Rubber Tubing or Adapter , for holding the crucible on the filter tube  

6. Erlenmeyer Flask , 125 mL

7. Oven , capable of maintaining a temperature of 110 ±5°C.