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Investigation of problems in binder extraction from conventional and rubber modified asphalt mixtures



Title: Investigation of problems in binder extraction from conventional and rubber modified asphalt mixtures
Author(s): O. Sirin, M. Tia
Paper category : conference
Book title: Sixth International RILEM Symposium on Performance Testing and Evaluation of Bituminous Materials
Editor(s): M. N. Partl
Print-ISBN: 2-912143-35-7
e-ISBN: 2912143772
Publisher: RILEM Publications SARL
Publication year: 2003
Pages: 212 - 219
Total Pages: 8
Nb references: 3
Language: English


Abstract: Reflux extraction tests were performed on both conventional and rubber-modified asphalt mixtures to investigate the problems in the discrepancies between the actual and the measured binder contents, their causes and possible solutions to these problems. During the preliminary evaluation, it was found that most of the rubber remains on the filter paper and a small amount of asphalt binder also remains in the aggregate and can not be completely extracted. Further investigation has shown that the amounts of rubber and asphalt which remain on the filter paper vary from one test to another and therefore, the amount of extracted binder and rubber can not be determined with high level of certainty.The results also indicated that the extracted aggregate absorbs some moisture from the air after it was dried and left in air to cool to room temperature. This increase in weight causes an error in computing the asphalt content. This problem can be solved by leaving the extracted aggregate to cool in a desiccator for a minimum of three hours before weighing.


Online publication: 2003-03-02
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143772.025


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