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Piotr Jaskuła
Influence of compaction effectiveness on interlayer bonding of
asphalt layers
| 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
The paper presents the results of research on the interlayer bonding of asphalt layers compacted in the laboratory and in the field. To
measure the interlayer bonding at a temperature of 20 °C the Leutner test apparatus was used and load was applied at a rate of 50
mm/minute. Three types of interlayer interfaces were tested: no tack coat and tack coats made of two types of the pure bitumen emulsions.
Four compaction techniques were used in laboratory conditions: rolling with and without vibrations, gyratory compaction and compaction
with slab compactor, including both hot-to-cold and hot-to-hot. The fields specimens cored from pavements differed in terms of relative
compaction. It was found out that interlayer bond strength between the layers of asphalt dependeds strongly on the applied compaction
technique, as well as the compaction effort. In some cases efficient compaction produced a maximum shear force without tack coat. The
type of emulsion used as the tack coat was also found to be highly relevant to the interlayer bonding.
Keywords: interlayer bonding; tack coat; Leutner shear test; asphalt layers; compaction of asphalt layers.
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