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Flexural beam fatigue properties of airfield asphalt mixtures containing styrene-butadiene based polymer modifiers



Title: Flexural beam fatigue properties of airfield asphalt mixtures containing styrene-butadiene based polymer modifiers
Author(s): J. K. Newman
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: 357 - 363
Total Pages: 7
Nb references: 12
Language: English


Abstract: This paper demonstrates that the choice of a polymer-modifier may have significant impact on fatigue properties and may need important consideration for the selection of an appropriate modifier for an airfield project. Additionally, it underscores the need for establishing a binder test that can delineate the effects of binder on the mix. For optimum economy of use, selection of an asphalt modifier that provides resistance to multiple distresses (rutting, fatigue, thermal cracking, water damage, etc...) is desirable. Several polymer modified asphalt binders were selected and a mix design conducted for a heavy-duty airfield according to US Army Corps of Engineers specifications. Testing focused on elastomeric styrene-butadiene polymers (a chemically-modified crumb rubber, MCR; styrene-butadiene rubber, SBR; reactive styrene-butadiene crosslinked polymer, SB; styrene-butadiene-styrene linear block copolymer, SBS; and a proprietary modified SBS, MSBS). Results indicated significant differences in modulus, phase angle, and cycles to failure (defined as 50% of initial stiffness) between the control and several of the modified mixtures. The SB modified mixtures demonstrates the highest fatigue lives of the mixture studied in this work. Although the results for modifiers differ significantly, caution must be exercised in extending the results of this work to other asphalts containing these polymers.


Online publication: 2003-03-02
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143772.044