Test spots for bitumen

Two grams of bitumen tested guarantee, does add ten milliliters suitable solvent to dissolve in the solvent of bitumen is repeated 8 cycles following:

After five seconds of the eighth pitch of all samples should be completely dissolved in a solvent otherwise we repeat the experiment in the first place. After the samples were dissolved in a solvent for 30 minutes at room temperature, and then for thirty minutes in the shower, put thirty degrees Celsius. A few drops of sample on a filter paper to Chkanym and wait to dry.