Application Report PNR 12: Consistency of Bitumen

The penetrometer PNR 12 is suitable for the determination of the consistency of highly viscous material like bitumen. Customized with various test kits the PNR 12 will perform tests according to different standards with manual or automatic surface detection.

This Application Report gives an overview about the most commonly applied method when measuring the consistency of bitumen samples with Anton Paar’s PNR 12. The PNR 12 measures the resistance a material provides against being pierced by a specifically shaped test body.

It is highly recommended to study and follow the respective standard.

Easy Surface Detection

Bitumen with a shiny surface shows a reflection of the needle, other bitumen types only a hardly visible shadow. It requires a lot of practice and experience to set the needle in the right position on the surface of a sample, especially under a layer of water. Bitumen with a shiny surface shows the reflection of the needle but with some kinds of bitumen only the shadow is visible.

To assure the precise adjustment and measurement even by inexperienced personal the PNR 12 offers a test program, suitable for bitumen samples <160 Penetration Units – with automatic surface detection and positioning of the test body. Even the bitumen classification according to EN 1426 is simplified, due to the automatic data conversion of the penetration depth indicated in Penetration Units [PU].

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