Effect of Binder Sources on the Chemical and Rheological Properties of Warm Mix Asphalt Binders

Date

2024-1-24

Author

Yıldırım, Semiha Uhde

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

607
views

122
downloads

Cite This

The chemical properties of bituminous binders, which vary based on the source, influence their physical and rheological characteristics. Due to the advancements in the additive industry, studies in recent years have been focusing not only on physical and rheological properties but also on chemical properties. Therefore, this study initially examined these properties of binders obtained from the Batman refinery, a domestic binder source, and the Kırıkkale refinery, an imported binder source, at two different penetration grades (50/70 and 70/100). Chemical properties are analyzed using the weight-base SARA (Saturate, Aromatic, Resin, and Asphaltene) and Fourier Transform Infrared Spectrometry (FTIR). The relation between the chemical, physical, and rheological characteristics was analyzed by considering the binder source. Moreover, 50/70 penetration grade binders from two different refineries are modified with two Warm Mix Asphalt (WMA) additives. Although it is known that the chemical properties of bituminous binders are changed with WMA additives, the effect has not been quantified in earlier studies. This thesis addresses the lack of understanding between the chemical, physical, and rheological properties of WMA-modified binders. The findings indicate that the binder source dominates the relationships and behaviors when modified with WMA additives. Thus, it is not sufficient to only consider the rheological properties of bituminous binders but also the chemical properties should be investigated. A linear relationship between the Gaestel indices of binders and the Aging index is determined for both unmodified and modified binders. It indicates that the weight-based SARA and FTIR analysis correlate well.

Subject Keywords

SARA, FTIR, Warm Mix Asphalt (WMA), Gaestel Index, Aging Index

URI

https://hdl.handle.net/11511/108361

Collections

Graduate School of Natural and Applied Sciences, Thesis