One of the method for modifying bitumen is emulsification with water which enhance bitumen properties incredibly. Another advantages of modification is that it can be applied cold (80°C). Emulsion bituminous asphalt consist of two immiscible liquids which are stabilized by emulsifier. They usually used for tack coats, hot-mixed asphalt, prime coats, chip seal. Firstly Anionic emulsion were developed and because cationic emulsion has more adhesion properties they are more favored especially in tack coating. The type (chemistry) of the emulsifying agent used, determines the designation. During application, the water in a bitumen emulsion is either lost by evaporation, or it may separate from the bitumen because of the chemical nature of the surface to which the emulsion is applied. This process is referred to as breaking.

Depending on the type of emulsifier the bitumen particles can be both positive and negative. Emulsions in which the bitumen droplets are negatively charged are called anionic emulsions.   While, Emulsions in

 which the particles are positively charged are called cationic emulsions.


Bituminous asphalt emulsion K1  -70  is a rapid setting cationic asphalt, which has positive charge leading reaction between the emulsion and pavement. It contains 67% bitumen . 1 denoted as rapid braking. The primer bitumen which is used for emulsification is obtained from crude oil.

The main applications asphalt emulsion K -70 are surface treatment, sand seal and tack coat.


INTERNATIONAL BITUMEN SUPPLY guarantee to supply  cationic bitumen K1-70  in compliance to the mentioned specification in table. 


Packing: Bitumen supply is able to provide every packaging according to customers enquiry.


Specification of anionic bitumen K1-70



Particle charge


Residue on 710 um KS sieve (%)(m/m), maximum


Residue on 150 um KS sieve (g per 100 mL), maximum


Binder content (%) (m/m), minimum


Viscosity (degrees Engler (°E) at 20°C)


Storage stability (long period test) % water content difference, maximum