Colbond 50 is nominally a 50% binder content polymer modified
Colbond 50 forms a uniform film of polymer modified bitumen on
the road surface which promotes a strong adhesive bond between a
bituminous overlay and the existing surface. The application of
Colbond 50 also improves the waterproofing of the road
Colbond 50 has been designed specifically for thin and
ultra-thin overlays. Colbond 50, when fully broken, prevents
'pick-up' on the wheels, tracks or tyres of the paver/delivery
vehicles and prevents disbonding of the overlay during subsequent
service life when subjected to traffic stresses.
|Properties of Colbond 50
|Emulsion binder content
|Recovered binder minimum Peak Vialit Cohesion
Surface to be sprayed must be free from weeds, standing water,
loose material and oil spillage.
Prior to application Colbond 50 should be homogenized
thoroughly. Colbond 50 should be applied at between 0.3 and 1.4
litres per square metre depending on the application. Vehicular
traffic should be kept off the treated area until the emulsion has
fully broken, (colour changes from brown to black), then apply the
overlay. Only apply Colbond 50 when the ground temperature is above
5°C and rising or less than 40°C.
Humidity should preferably not exceed 70%. Colbond 50 can be
applied in higher humidity but this will prolong the break time.
Because the base binder used in Colbond 50 is polymer modified, it
behaves differently from conventional bitumen emulsions.
It may therefore be necessary to warm the Colbond 50 to ease
application.When applying through small motorised or petrol driven
units, ensure the sprayer system is flushed regularly. This is of
particular importance when impeller driven pumps are used. For
further information please contact our Colas Technical Department
on (01342) 711000.
Protect from frost. Drums should be rolled frequently to avoid
separation. For further information please refer to BS434: Part 2:
2006 Section 5; Clause 5.2. 'Storage'.
Colbond 50 complies with the requirements of an Intermediate
Grade Binder in accordance with Clause 920 of The Specification for
Colbond 50 is available in 200kg drums or bulk.
Add Colbond 50 to enquiry list