SMA mixes have performed well in wearing courses, so it was a natural process to test them in the remaining layers of a pavement. As everybody already knows, SMA has proved to be a good material for these places. Therefore, SMA has found its way
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FIGURE 13.3 Thin SMA wearing course of 0/6.3 mm grading paved on the DK3 route in Poland, condition in 2006 after 13 years in operation. (Photo courtesy of Krzysztof Blazejowski.) |
to intermediate layers. Also research on a special type of SMA for low-noise pavements is in progress in Germany.
Besides classic SMA mixes, the method of designing a strong mineral skeleton has encouraged many road engineers to carry out their own trials on new mixes. One of them is Kjellbase, though it is not a true SMA mix.
The latest atypical SMA applications are colorful mixes.
