Special device for asphalt pavement shear properties testing

Technology description

The name of the technology: Special device for asphalt pavement shear properties testing
Challenge: Permanent deformations in asphalt pavements are problematic. To design materials such as hot mix asphalts according to its permanent deformations is crucial aspect.

There are basically two different approaches how to measure permanent deformations in asphalt in Europe and in the USA.

Laboratory wheel-tracking devices are used to run simulative tests that measure hot-mix asphalt qualities (rutting, fatigue, moisture susceptibility and stripping predictions) by rolling a small loaded wheel device repeatedly across a prepared hot-mix asphalt specimen. These tests are called “pass or fail tests” based on rutting potential (a surface depression in the wheel paths), however these tests cannot be reasonably correlated to field rut performance.

Hot-mix asphalt is a high-quality, thoroughly controlled hot mixture of asphalt binder and aggregate that can be compacted into a uniform dense mass.
Description: The researchers from the Czech university in cooperation with other partners have developed and successfully tested an improved device for testing asphalt pavement shear properties. It offers the simple shear properties testing of granular materials. It can be used to design material and to perform quality checks.

The test device allows testing built layers of asphalt or specimens prepared in laboratories. Performance of those test specimens or built layers is then correlated to actual in-service pavement performance.

The test device aims to be used by producers of asphalt mixtures, companies laying asphalt mixtures, laboratories examining the properties of asphalt mixtures and laboratories to prepare advanced materials that either fulfils same function with lower production price or have better properties during its lifetime (or both at the same time).
Commercial opportunity: The researchers are looking for manufacturing partners (e.g. manufacturers of testing equipment for asphalt mixtures producers, instrumentation manufacturers or testing device manufacturers) interested in a licensing agreement.

The subject of the license agreement will be know-how (measurement device principle, detailed scheme of working etc.) as well as know-how for manufacturing of the device.
IP protection status: Czech patent no.306155, EP3329245. Patent applications for USA, Canada, China, South Africa and Saudi Arabia
Development status:

Phase 3

Corresponds with TRL 5 and TRL 6

Technology validation and implementing it in real environment. Testing the technology outside of the laboratory and its adjustment to external conditions.

  • TRL 5 represents a state where the results of the real environment tests are known and there is an idea of how to deal with the problems found (if any)
  • TRL 6 is a state where a fully functional prototype already exists and is capable of fulfilling all its functions
Partnering strategy: Collaboration licensing
More information: http://een.ec.europa.eu/tools/services/PRO/Profile/Detail/8ac43d78-468f-4f0a-8bdd-f6350bc4b6d6?OrgaId=cz00529
Keywords: asphalt diagnostics materials pavements transportation
Categories: Civil Engineering and Architecture Engineering
Owner of a technology: České vysoké učení technické v Praze
Institution: Czech Technical University in Prague
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