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۱A New Method to Produce Pigmentable Bitumen
نویسنده(ها): ،
اطلاعات انتشار: اولین همایش بین المللی قیر، سال
تعداد صفحات: ۵
Color is the most informative tool for human perception of his environment. Colors play an essential role in human psychology and environment esthetic. Roads and streets are amongst the important components of today's life especially in mega metropolitans. Almost all streets, roads and highways are paved by bitumen–based asphalts. Bitumen inherently is black in color and almost all bituminous products such as hot–mix asphalt are black. This is the reason for our habitude to know the black color as standard color for roads and any pavement. To answer the needs of modern constructions we ought to have bitumen in warm and cold colors such as red, green blue etc. Here, we report a new method to prepare pigmentable (colored) bitumen in a vast range of colors using vacuum bottom residue. The resulting bitumens are of suitable colors and physical properties as those of standard 60\70 pentration grade bitumen.<\div>

۲Hybrid Petroleum–Tar Binder for Hot–Mix Asphalt Concrete
نویسنده(ها): ،
اطلاعات انتشار: اولین همایش بین المللی قیر، سال
تعداد صفحات: ۸
The well–known petroleum bitumen is a soft material under traffic loads and very susceptible to washing out by water. This properties result in high rates of rutting and raveling of the asphalt pavement constructed using bitumen. On the other hand, coal tar is a very highly aromatic mixture which is of a high molecular non–modified weight and rigidity and water insolubility at room and high temperatures. Meanwhile, the existence of poly aromatic rings in tar has made its applications very limited. Blending some low percentages of coal tar with vacuum bottom residue results in preparation of a mixture which is very resistant to deformation witnessed by a higher Marshal strength and a lower Marshal flow for the asphalt concrete prepared using coal–tar\VB blend as binder. The conventional physical properties of the binder are also confirming superiority of the blended binder.<\div>

۳Petrochemical Wastes as Bitumen Modifiers
نویسنده(ها): ،
اطلاعات انتشار: اولین همایش بین المللی قیر، سال
تعداد صفحات: ۱۵
It is very hard to keep operative a chemical plant with too many wastes. In a petrochemical plant in which polymeric materials are produced there are some side products of this kind. There are some ways to get rid of these wastes and reuse them in a proper way. Bitumen was modified with the wastes of SBR and HDPE production lines. The HDPE wastes are very effective in high temperature, whereas SBR wastes are very effective in improving low and high temperature properties of bitumen. Combinations of these two polymeric wastes are good enough in production of polymer–modified bitumens. The resulting blends are of estimated performances at all service temperatures.<\div>
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