Self Healing Aspalt on the A58

On this Blog we will give info on the test track with Self Healing Asphalt that is built on the A58 near Vlissingen in The Netherlands. The Asphalt is a special type of ZOAB (very porous aphalt concrete) containing small steelwool fibres. A known but serious problem with ZOAB is ravelling: stones at the surface coming off in time due to microcracking in the binder. The special ZOAB that is developed at Delft University (sponsored by AgentschapNL) can be heated with induction energy due to the fibres that are present which closes the microcracks and with that extends the service life of the road.

Wednesday, 4 March 2015

30 years

A Dutch newspaper that was invited by Rijkswaterstaat (Dutch government), wrote an article about the test-track. The conclusion is that our 'wonder-asphalt' can last for 30 years!!!!


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  2. Surprising and amazing that the asphalt can heal - what an amazing product!

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  10. Fibre for concrete primarily act to bridge the growing cracks, thus restricting their further growth and propagation. For maximum effectiveness, the pull out strength of the fibre in the concrete matrix should be higher than the tensile fracture strength of the fibre.

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