GILSONITE –production of Asphalt

GILSONITE –production of Asphalt

Gilsonite is mined ore as natural resinous hydrocarbon, and it is also called natural asphalt. This natural asphalt is similar to hard petroleum asphalt and is often called a natural asphalt, asphaltite, uintaite in US, or Asphaltum. Due to its unique compatibility, Gilsonite is frequently used to harden softer petroleum products.

The Gilsonite was characterized by elemental analysis (EA) to determine the concentrations of C, H, N, S, and O, by Fourier transform infrared spectroscopy for comparative analysis of the chemical structures, by Nuclear magnetic resonance spectroscopy of hydrogen (1 H NMR) to ascertain the aliphatic and aromatic hydrogen fractions, and by Thin layer chromatography-flame ionization detection (Iatroscan TLC-FID) to quantify saturated and aromatic hydrocarbons, and resin/asphaltene fractions

It has low hydrogen to carbon atomic ratio 1.44, it has low sulfur value 0.27 % and high nitrogen 3.25 % contents were the main characteristics. FTIR revealed the presence of alkane, aromatic rings, phenyl rings, alcohols, carbonyl groups, organic sulfoxides, and sulfate salts, confirming the fact that Gilsonite is composed of high molecular weight polycyclic constituents comprising of nitrogen, sulfur and oxygen heteroatoms

Gilsonite contains considerable amount of asphaltenes 79.7 % and no pure aromatics. While, the yields of saturates and resins account only for 1.6 % and 18.7 %, respectively

As one of materials It is believed that these factures were once filled with a heavy, viscous crude oil that lost of its volatile constituents and then solidified. Much Gilsonite is used directly in its crude form, as insulation for pipelines, particularly hot pipes, as waterproofing and undercoating for wood and metal, and as paving, roofing and other uses identical with crude asphalt. Gilsonite is also blended with refinery produced asphalt and petroleum products to obtain certain desired characteristics. It is used in saturating felts and building construction papers

Application of gilsonite:

  1. cement companies
  2. pipeline companies
  3. metal foundries
  4. refineries
  5. at construction companies (constructing roads and cities)

Application in production of asphalth

We propose to add Gilsonite / Oxidised bitumen because of:

  • is used as a performance- enhancing agent for asphalt mixes (it makes roads stronger and last longer).
  • is used to make both solvent-based and emulsion pavement sealers with superior appearance and weathering properties
  • achieve higher PG grades
  • incorporate perfectly into the asphalt blend with no need for high shear milling as is the case with many other modifiers.
  • gives higher stability,
  • offers reduced deformation,
  • provides reduced temperature susceptibility
  • has increased resistance to water stripping than non-modified asphalts


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