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.

Thursday, 23 December 2010

Lab experiments in preparation

Of course we are not going to wait untill we get damage in the real asphalt on the road. Next to the test track an extensive research program is being prepared (sponsored by Rijkswaterstaat , the Ducth Government).
Tests that will be performed are ITS(R), bending, fatigue, RSAT, CT-scanning, nano-indentation, microscopy, etc. The tests will be done on virgin, artificialy aged and on healed specimens.

The pictures show the setup and specimens for the RSAT test that is developed and will be used by partner Heijmans. This test gives a very good indication of the performance of the new asphalt against raveling.

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