Yeşilçiçek H.
3rd International Conference on Engineering, Natural Sciences, and Technological Developments (ICENSTED 2026), Erzurum, Türkiye, 3 - 06 Temmuz 2026, ss.436-441, (Tam Metin Bildiri)
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Yayın Türü:
Bildiri / Tam Metin Bildiri
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Basıldığı Şehir:
Erzurum
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Basıldığı Ülke:
Türkiye
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Sayfa Sayıları:
ss.436-441
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Karadeniz Teknik Üniversitesi Adresli:
Evet
Özet
This study investigated the effect of zinc borate (ZnB)
additive on the high-temperature performance of asphalt binder. For this
purpose, the base binder was modified with 2% and 8% ZnB by weight of asphalt binder, and the unmodified asphalt binder was used
as the reference sample. The prepared asphalt binders were evaluated using penetration, softening point,
and Dynamic Shear Rheometer (DSR) tests. The penetration results showed that
ZnB addition increased the consistency of the asphalt binder, with the lowest penetration value obtained for the
8% ZnB-modified binder. The softening point values also increased with ZnB
addition, indicating an improvement in resistance to flow at high temperatures.
DSR results demonstrated that the effect of ZnB on high-temperature performance
was dependent on the additive content. The 2% ZnB-modified asphalt binder did not improve the rheological performance
of the base asphalt binder and showed lower
G*/sinδ values than the unmodified binder. In contrast, the 8% ZnB-modified
binder exhibited higher complex shear modulus and G*/sinδ values than the base
binder at the evaluated temperatures, indicating enhanced stiffness and
improved resistance to permanent deformation. According to the high-temperature
performance grading, the unmodified and 8% ZnB-modified binders were classified
as PG 70, while the 2% ZnB-modified binder was classified as PG 64. Although
the 8% ZnB additive did not increase the PG grade of the base binder, it
provided a higher rutting resistance within the same performance grade.
Overall, the findings indicate that 8% ZnB has potential as an inorganic
modifier for improving the high-temperature deformation resistance of asphalt
binder.