The RKA 5 ring-and-ball softening point tester automatically determines the temperature at which a substance attains a particular degree of softness. It is used for samples without sharply defined melting points, which become softer and less viscous as the temperature rises. RKA 5 is suitable for bitumen, waxes, adhesives, resins, polymers, roadmarking materials and sealing compounds, etc.
ASTM D36, ASTM E28, ISO 4625-1, EN 1238, EN 1427, EN 13179-1, JIS K 2207, AASHTO T53, IP 58
Optional: EN 1871-F, DIN 1996-15
Up to 200 °C
Ball dispensing systems:
Manual ball dispensing
Automatic ball dispensing (optional)
Wilhelmi Method (optional)
This method is mainly used for viscoelastic materials like bitumen without sharply defined melting points; these gradually become softer and less viscous as the temperature rises. The determined value is used for the classification of bitumen. It is an indicator of the material’s tendency to flow at the elevated temperatures prevalent in the field.