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Viktoras Vorobjovas
, Tadas Andriejauskas
, Zigmantas Perveneckas
Selection of Soft Asphalt Pavements for Low-volume roads in Lithuania
| Conference Information: |
9th International Conference on Environmental
Engineering, MAY 22-24, 2014 Vilnius, LITHUANIA |
| Source: |
ICEE-2014 - International Conference on Environmental
Engineering |
| Book Series: |
International Conference on Environmental Engineering
(ICEE) Selected papers |
| ISSN: |
ISSN 2029-7092 online |
| ISBN: |
978-609-457-640-9 / 978-609-457-690-4 CD |
| Year: |
2014 |
| Publisher: |
Vilnius Gediminas Technical University Press Technika |
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Abstract
In Lithuania pavement structure of low-volume roads satisfy the 6th class according to normative documents where annual average daily
traffic is up to 500 vehicles per day. According to normative documents the thickness of pavement frost resistance structure is reduced.
But in winters of 2010/2011 and 2011/2012 a very high freezing index was observed. It led to frost heaving, cracking, loss of bearing
capacity and numerous defects in spring. Preliminary investigations showed the need to pay attention to the top 30 cm of subgrade, which
has to be constructed with low frost sensitive soils or need treatment. These additional works would significantly increase the road
construction costs up to 25 %. As an alternative solution the use of soft asphalt pavements was proposed. This technology is widely used
in Nordic countries. But in Lithuania it has never been applied. Research on the designed soft asphalt mixtures was carried. Also, it was
proposed the recommendation for soft asphalt pavement structure for low-volume roads in Lithuania.
Keywords:low-volume roads; soft asphalt; soft bituminous binder.
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