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.
emulsion CSS-1 is a slow setting cationic asphalt, which has positive charge
reaction between the emulsion and pavement. The primer bitumen which is
used for emulsification is obtained from crude oil. The main applications asphalt
emulsion CSS-1 are road construction,
fog seal, prime coat , sand seal and cold mixed asphalt.
INTERNATIONAL BITUMEN SUPPLY
guarantee to supply cationic bitumen
CSS-1 in compliance to the mentioned
specification in table.
supply is able to provide every packaging according to customers enquiry.
anionic bitumen CSS-1
viscosity at 25°C
Penetration at 25 °C
Ductility at 25 °C