The development of compact asphalt paving technology goes back the 1990s. Up to now many square meters of asphalt were laid in that way in Germany.
Supporters and studies say that the advantages are saving money, time and material and also the improvement of quality aspects, for example a high bonding and interlocking of two courses.
But in the UK there is still high resistance against this way of building roads. Read more about the reasons why in the June edition of The Construction Index Magazine (p.29-32).
What is the situation in other countries, Are there also objections against compact asphalt? What is your experience?
In China there is no regulation to say to use or not to use, it depends on the road builder and what type of paver they have, as long as their pavement meet the standard, whatever ""hot on hot"" or""hot on warm"".
So far I know only Danapac paver and Vogele paver can complete the ""hot on hot"" process, other chinese pavers only can work on ""hot on warm"".
Here is a table to show the difference:
Paving method ""Hot on hot"" ""Hot on warm""
Variants one paver or two pavers right one after another two pavers one after another
Paver Special or conventional modified conventional
paver OEM Dynapac and Vogele all producers
Mobile feeder Needed No needed
loading of surface course mix by mobile feeder from lorry
compaction of binder course before
surface course by paver screed by paver screed and rollers
final compaction both course together compaction of surface course (also additional post-compaction of binder course is possible)
The most road was paved by ""Hot on warm"" in China.