For the next several posts,I am going to introduce different types of bitumen.Blown Bitumen is the first and it will be followed by cut back, emulsion, modified and fluxed bitumen . Hope to find the info helpful.
Oxidized Bitumen is produced by passing air through a bitumen feedstock under controlled conditions. This produces higher softening point bitumen with reduced susceptibility to change with temperature and greater resistance to imposed stresses. Compared with pure bitumen, blown bitumen has a low penetration rate and a high softness point.
The degree of oxidation can range from very small, often referred to as air-rectification, or semi-blowing, which only slightly modifies the bitumen properties, through to “full” blowing, whereby the properties of the bitumen are significantly different to penetration grade bitumen.
Oxidized Bitumen is produced by either Continuous or Staggered Blowing Process. The producing operation of oxidized bitumen mainly includes different steps: tank loading, bitumen blowing, condenser external gases and packing.
Blown grade bitumen is widely used as an anti-slip layer compound in the piling industry, for manufacture of roofing felts, for sound dampening felts and under carriage sealant in the automobile industry, electric cable joint protection, joint filling compound, sealant compound and many others
P.S: Gildatar is proud to make possible the supply of Middle East bitumen in multiple grades 60/70, 80/100, 85/100, 85/25, 40/50, and 30/40.
Sources: e-asphalt.com , eurobitume.eu , petrotarco.com , benzeneinternational.com , blownbitumen.com
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