Effects of the Combined Use of Styrene-Butadiene-Styrene and Gilsonite in Bitumen Modification on the Stiffness and Thermal Sensitivity of Bitumens

Year 2018, Volume: 13 Issue: 1, 77 - 85, 01.03.2018

Özge Erdoğan Yamaç Mehmet Yılmaz Baha Vural Kök

Abstract

In the present study, the effects of
styrene-butadiene-styrene (SBS) and American gilsonite (AG) on the stiffness
and thermal sensitivity of bituminous binders were investigated in bitumen
modification. Şanlıurfa province was chosen as the application field. It was
determined that 18% AG and 5% SBS additives should be used separately to obtain
the adequate binder for Şanlıurfa province. It was also determined that 13% AG
with 2% SBS, 10% AG with 3% SBS and 6% AG with 4% SBS were required to obtain
binders with the same performance level. Penetration, softening point and
rotational viscometer tests were conducted on neat and modified bitumen to
determine the consistency of binders. Furthermore, thermal sensitivities of
binders were determined from penetration index and penetration viscosity number
values. It was determined that all additives increased the consistency of the
binders, the most effective additive type and ratio was 18% AG on penetration
values, and all additives had similar effects on the softening point and
viscosity values. In addition, it was determined that the temperature
susceptibility was reduced with additive use and the most effective
contribution came from 5% SBS.

Keywords

Bitumen, Styrene-butadiene-styrene, American Gilsonite, Consistency, Temperature susceptibility

References

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