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Emulsions-Bitumen & Tar
Whatever the end use, application conditions usually require bitumen to behave as a mobile liquid. In principle, there are three ways to make highly-viscous bitumen into a low-viscosity liquid:
- Heat it
- Dissolve it in solvents
- Emulsify it
Bitumen emulsions are two-phased systems consisting of bitumen, water, and one or more additives to assist in formation and stabilization and to modify the properties of the emulsion. The bitumen is dispersed throughout the water phase in the form of discrete globules, typically 0.1 to 50 microns in diameter, which are held in suspension by electrostatic charges stabilized by an emulsifier. Bitumen emulsions can be divided into four classes. The first two are, by far, the most widely used:
- Cationic emulsions
- Anionic emulsions
- Non-ionic emulsions
- Clay-stabilized emulsions
The terms anionic and cationic stem from the electrical charges on the bitumen globules. This identification system originates from one of the fundamental laws of electricity – like charges repel, unlike charges attract. If an electrical potential is applied between two electrodes immersed in an emulsion containing negatively charged particles of bitumen, they will migrate to the anode. In that case, the emulsion is described as “anionic”. Conversely, in a system containing positively charged particles bitumen, they will move to the cathode and the emulsion is described as “cationic”. The bitumen particles in a non-ionic emulsion are neutral and, therefore, will not migrate to either pole. These types of emulsion are rarely
Bitumen emulsions are divided into three categories in terms of setting:
- Rapid-setting (RS)
- Medium-setting (MS)
- Slow-setting (SS)
Cationic RS emulsion is currently the widely used category in Iran. Emulsion setting is irreversible phenomenon which may occur due to the evaporation of the water phase or the attraction of water by stone materials. Throughout this phenomenon, the water phase disappears and bitumen particles will have less space. Then, the bitumen gradually moves towards the surface or coats the aggregate.
These emulsions are known as cationic because their bitumen aggregates carry positive charges by using Ammonium salts or Amines compounds. They are divided into the following categories:
Category: Filling Machine
Shipping & Delivery
ADIPISCING CONVALLIS BULUM
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It is advisable to keep the rolls in warehouse, notexposed to the sun rays and at a higher temperature than +5°C. Keep the rolls in the upright position . If possible, avoid stacking pallets, especially with slated membranes. It is advisable to use the productwithin 2/3 months from delivery.
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This Type is Produced According to Customers' Request, Pavements Designed and Constructed for Heavy Duty Traffic and Extreme Weather Conditions Require Specially Designed Engineered Bitumen Grades. By Changing the Characteristics of Normal Bitumen with Change of Process Condition or and the Addition of a Modifier such as Polymer.
Bitumen production in according to three standard method (Blowing method ,Straight run method and Blending method) in Iran and other countries
The Air Blowing Bitumen is produced by process of vacuum Bottom (VB) and air in the reactor. and due to the control of the process conditions, different grades are produced.
Bitumen clasification according to various specification such as Penetration, Viscosity, Performane of bitumen in the road and ....
Iso Gam, Waterproofing of buildings, which was traditionally done with asphalt and bitumen until the last forty years, with the advent of waterproofing and the advantages of this type of insulation, these insulations gradually gave way to these. Today, in most buildings, whether in the foundation stage or in the insulation of walls, services, and roofs, insulation is done with a layer of iso gum waterproofing.
Cutback Bitumen is by Adding Controlled Amounts of Petroleum Distillates Such as Kerosene. This is Done to Reduce the Viscosity of the Bitumen Temporarily so it Can Penetrate Pavements More Effectively or to Allow Spraying at Temperatures that are too Cold for Successful Sprayed Sealing with Neat Bitumen. The Materials Used to Cutback Bitumen Will Evaporate After Application to Leave the Remaining Material Similar in Hardness to the Original Bitumen Cutback Bitumen Applications is Asphalt Pavement Construction, Maintenancem, Prime and Tack Coating and ...
According to zinc testers (or viscosity), it means: the penetration of a standard needle with a certain shape in millimeters under the effect of a load of 100 grams in 5 seconds in bitumen Which takes place at a temperature of 25 ° C. The obtained number indicates the permeability of bitumen