Oxidized Bitumen

Scurea is a UAE company branched in Abu Dhabi Sharjag and Dubai actively involved in manufacturing procurement distribution and export of various grades of oxidized bitumen.We are structured into focused on oxidization of Bitumen division to serve the different needs of our customers worldwide. We have a long history of supplying Oxidized Bitumen to bitumen factories, asphalt companies, roof insulation companies and membrane sheet manufactures.We are providing Blown Asphalt or Oxidized Asphalt or Blown Bitumen or Oxidized Bitumen 115/15 or Oxidized asphalt 115/15 or blown bitumen 115/15 or bitumen 115/15, Oxidized Bitumen 85/25, Oxidized Bitumen 95/15, Oxidized Bitumen 100/15, Oxidized Bitumen 150/5, Oxidized Asphalt 115/15, Oxidized Asphalt 85/40,Oxidized bitumen 85/40, Hard asphalt or Hard bitumen, all grades of Oxidized Bitumen will produce according to order.Throughout the world, more than 7 types of bitumen that is produced depend on the type of weather conditions one of them is Oxidized Bitumen or Blown Bitumen.Oxidized bitumen grades are suitable for sealing saw cuts and joints where there is expected to be the minimum amount of moving in the joint. Their wide temperature range prevents bleeding in high temperature applications. Oxidized bitumen can also be used in industrial applications like roofing, flooring, mastics, pipe coatings, electrical applications.

UAE Bitumen used in a wide variety of 'industrial' applications including roofing, flooring, pipe-coating etc. They are produced by passing air through soft bitumen/flux mixtures under controlled temperature conditions. British Standard grades (BS 3690) are normally designated by two numbers representing the mid-points of their softening point and penetration ranges. How to produce Oxidized Bitumen (Blown Bitumen)?

Production process:

Bitumen heating to 265-270�C

Transferring melted bitumen to blowing towers

Blowing air to bitumen

Cooling melted bitumen with water

Packing

Available UAE oxidized bitumen which is made by blown asphalt

oxidized bitumen 150/5oxidized bitumen 135/15oxidized bitumen 115/15oxidized bitumen 105/35oxidized bitumen 95/25oxidized nitumen 90/40oxidized bitumen 90/15oxidized bitumen 85/25oxidized bitumen 75/25

1. Continuous blowing procedure

2. Discontinuous blowing procedure

These two procedures are done by other two procedures named catalysis and anticatalysis.

Catalysis means adding some chemical material during the process In order to decrease blowing reaction time.

For the following reasons:

Ease and simplicity in changing blowing condition and have production with different grades as a result. Ease in generating the unit. Ease in technology and also low expense in investment. The discontinuous producing procedure is chosen. Technical point and operating conditions are as follows: The blowing should be done from the bottom of blowing tanker. The reaction between bitumen and air is calorific .If the heat produced during the mixture is high, the heat of reaction is controlled by water injection. Admixture of air and the volume of blowing air is two important variants in blowing process.In bitumen producing plant, bitumen 60/70 is usually got by blowing. In this case for making bitumen 90/15 or 85/25 distilled used oil or crude oil should be injected to the product according to the volume 20-25 % otherwise the fragility in bitumen lead to inferior production.Increasing the heating temperature, air injection amount, time and tower pressure increase the speed of production process reaction. The suitable temperature for production operation is 265-270�C which should be controlled not to be ascended since in high temperature and in 288�C intensity of reaction becomes more sever and incontrollable which lead to explosion in tower.The long time stay of bitumen in tower in any condition is not in favor of system and should be delivered to drum or empty tanker after being ready.If the liquid surface in blowing tower is low, not more than particular limit should be added to the system for the extra air gather in empty parts and lead to ignition nearly. And if the temperature is kept high, the inside heat of tower ascend fats and this issue cause inside explosion and endamage the system.

Blowning tower is filled up to 70%. Air injection is done in 190-232�C. The final point of blowing is specified by sampling and testing of bitumen properties. Finally the temperature of product should be kept 150- 165 �C in order to have loading and packing capability. The production process is as follows:The producing operation of oxidized bitumen mainly includes tank loading different steps, bitumen blowing, condenser external gases and packing. So in the beginning the loose bitumen shipped to the plant by tanker is transferred to the raw material store tanker. In order to transfer the bitumen easily to the blowing tower the burner is contrived at the bottom of the store tanker to heat them. It is necessary to say that if the blowing towers are empty, hot bitumen can be uploaded directly to them and blowing operation start. Since the volume of bitumen increases as a result of blowing and it may overflow, the blowing tower is filled up to 70 %. Air injection is usually done when the temperature of material reach to 190-230 �C. For gradual heating and also pipes filling with the air is entered from the top of the tower and at the bottom the bitumen dispread monotonously in phase via nozzel then oxidation is done accordingly and the light molecule, volatile gases and steam are emitted from the top of the tower. Blowing operation is done in temperature range 215-290�C but the suitable temperature is between 265 to 270�C. The needed heat is provided by burner contrived at the bottom of the tower. The bitumen reaction is calorific so in order to prevent the explosion danger resulted from temperature increasing, the temperature can be controlled by water injection, burner extinguisher and air amount reducing.