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Influence of polymer modification on low temperature behaviour of bituminous binders and mixtures



Title: Influence of polymer modification on low temperature behaviour of bituminous binders and mixtures
Author(s): X. Lu, U. Isacsson, J. Ekblad
Paper category : journal
Serial title: Materials and Structures
Abreviated Serial title: Mater. Struct.
ISSN: 1359-5997
Publisher: RILEM Publications SARL
Volume: 36
Issue: 264
Issue date: 2003-12-01
Publication year: 2003
Pages: 652 - 656
Total Pages: 5
Nb references: 8
Language: English


Abstract: Effects of polymer modification on low-temperature properties of bituminous binders and mixtures were studied.
Three bitumens were blended with 6% SBS, SEBS, EVA or EBA.
Dense graded asphalt mixtures were prepared using a gyratory compactor.
The low-temperature properties of the binders were characterised using dynamic shear rheometer and bending beam rheometer, and the low-temperature cracking of the mixtures evaluated by tensile stress restrained specimen test.
The results indicated that low-temperature parameters were greatly dependent on the base bitumen, and in most cases, polymer modification did not show significant benefits.
The mixture cracking temperature was found to correlate with the limiting temperatures (in bending beam rheometer) of the binders, weakly with Fraass breaking point, but not with parameters obtained using dynamic shear rheometer.
Upon isothermal storage at low temperatures, the bitumens displayed physical hardening, and effect of polymer modification was small.
However, physical hardening as measured by TSRST (tensile stress restrained specimen test) was not observed for the mixture studied.


Online publication: 2003-10-27
Classification: Scientific Reports
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/14083


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