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 CRS-1 is a rapid setting
cationic asphalt, which has positive charge leading
reaction between the
emulsion and pavement. It contains 60% bitumen ,the primer bitumen which is
used for emulsification is obtained from crude oil.
The main applications asphalt emulsion CRS-1
are tack coat, fog seal, Dust control and sand seal.
INTERNATIONAL BITUMEN SUPPLY
guarantee to supply cationic bitumen
CRS-1 in compliance to the mentioned
specification in table.
supply is able to provide every packaging according to customers enquiry.
anionic bitumen CRS-1
viscosity at 25°C
Residue Penetration at 25 °C
Ductility at 25 °C