Keep the sample container completely covered with water in the bath. If the penetration is greater thanusing at least 3 needle for leaving them into specimen until the3 determination completed. Clean a penetration needle with toluene or other suitable solvent, dry with a clean cloth, and insert the needle into the penetrometer. If the differences are exceeded repeat the test using second sample. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. The needle shall be mounted in a non-corroding metal ferrule.
The spindle shall be easily detached for checking its weight.
Automatic Digital Bitumen Penetrometer
Clean a penetration needle with toluene or other suitable solvent, dry with a clean cloth, and insert the needle into the penetrometer. Work Item s - proposed revisions of this standard. The total axial variation of the intersection between the conical and straight surfaces shall not be in excess of 0. Other conditions may be used for special testing, such as the following: The penetration is measured with a penetrometer by means of which a standard needle is applied to the sample under speci?