Abstract
In this study, the effects of oils obtained from vegetable products on the physical, mechanical and hydrophobic properties of bitumen were investigated. Within the scope of the study, six different vegetable oils were used for bitumen modification: hemp oil, flax seed oil, laurel ghee, centaury oil, castor oil, pine turpentine oil. These are 100% pure vegetable oils, obtained by using cold press method. The bitumen was modified by adding vegetable oils to bitumen with the proportions of 3%, 5% and 7%. Including the reference group, 19 sample groups were formed with six different vegetable oils by using three different mixing ratios. The physical and mechanical properties of the prepared bitumen samples were determined, according to their contact angles their sensitivity to water, surface wetting and hydrophobic properties were determined by using the IMAGEJ program. As a conclusion of the results of the studies, it has been introduced that different vegetable oils cause serious changes in the physical and mechanical properties of bitumen, and in addition, bitumen modified with vegetable oils can make a significant contribution to removal of water from the road surface which is a major problem for traffic safety.
Highlights
In this study, in order to eliminate the damage caused by water and moisture on bitumen, the change in the hydrophobic property of bitumen as a result of modification with different vegetable oils has been investigated.Bitumen is a chemical having a high boiling point that contains hydrocarbons in its structure
As a conclusion of the results of the studies, it has been introduced that different vegetable oils cause serious changes in the physical and mechanical properties of bitumen, and in addition, bitumen modified with vegetable oils can make a significant contribution to removal of water from the road surface which is a major problem for traffic safety
In the mixture with Flax Seed Oil (FSO), Castor Oil (CAO) and Laurel Seed Oil (LSO) additives, when the effects were examined according to the varying ratio of the vegetable oils in the mixture, it was observed that the softening point increases along with the increase in the ratio of vegetable oil
Summary
Bitumen is a chemical having a high boiling point that contains hydrocarbons in its structure. Bitumen is used as a binder for the aggregates in asphalt mixture to hold together. Its road surface properties are known to play an important role in traffic safety. As a result of the technology supply and greater demand from road users, surface properties of roads are becoming increasingly significant in the construction and maintenance of roads for comfort and safety [1]. Bituminous coatings provide good driving comfort to drivers by means of their smooth surface feature. Roads with smooth surfaces would reduce the risk of accidents in rainy weather. There is consensus among many researchers about the effect of the surface properties of the coating on accident risks [2,3,4]
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