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In the field of the anti-corrosion protection of metal structures (bridges, lock gates, lamp posts, etc.) and the painting of concrete, artificial aging tests are employed in an attempt to select products and systems of products that can ensure the desired service life (generally at least ten years).
While great care must be taken in performing these tests, in particular where their reproducibility is concerned, it is their interpretation that is the most tricky task; they must be interpreted prudently, with the aid of mechanical tests and in the light of experience on the actual site.
Where the marking of pavements is concerned, this type of test has had to be abandoned, for it is not possible to reproduce properly in the laboratory the simultaneous effect of mechanical wear due to traffic and the effect of weathering. The rating obtained in the laboratory is different from that obtained on the road, especially in view of the wide diversity of products employed. So at the present time a road test of quality is being used for these products in France. A study also is being made of the use of a circular test track.
durability, building materials, artificial aging, civil engineering, anti-corrosion paints, painting on concrete, horizontal signing
Head, Central Laboratory for Bridges and Highways (LCPC), Paris,