1. What is Gilsonite
GILSONITE is a pure hydrocarbon, with a melting point between 160°C and 220°C. The mineral is natural bitumen and geologically petroleum based solid and therefore extremely compatible with petroleum bitumen. When blended, a very intimate molecule of GILSONITE and bitumen is formed, one that takes on some hardness and durability of GILSONITE while still retaining the flexibility of the bitumen. Gilsonite is mined in underground shafts and resembles shiny, black substance similar in appearance as the mineral Obsidian It is brittle and usually micronized into dark brown powder. It is mainly composed of asphaltenes; thus, Gilsonite Is classified as a Natural Asphalt and also known as Gilsonite or Uintaite. Discovered in the 1860s, it was first marketed as a lacquer, electrical insulator, and waterproofing compound. This unique mineral is used in more than 160 products, primarily in dark-colored printing inks and paints, oil well drilling muds and cements, asphalt modifiers, foundry sand additives, and a wide variety of chemical products. 2. What makes GiLSONITE different from other natural Asphalts
1 high purity and consistent properties
2 high nitrogen content
3 high molecular weight
4 high asphaltene content
5 high solubility in organic solvents
GILSONITE doesn’t contribute to low temperature cracking. This is contrary to logic and experience with other bitumen modifiers that also impart hardness, The semi-polymeric nature of GILSONITE and its unique chemical composition are responsible for this unusual behavior. The high asphaltene content and high molecular weight function mainly as a solution thickener or flow controller, These two factors are the main reason for the improvement in the pavement stability characteristics. The high nitrogen content of GILSONITE gives the modified bitumen better adhesion to aggregate which improves stripping characteristics, as well as oxidation resistance.
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