Rapid Setting 1

Bitumen Emulsion Rapid Setting 1 (PBI CRS -1)

It is a specially designed product for ensuring a uniform and strong Tack Coat for bituminous road construction purpose.

GRADE R S -1 is normally used for

Uniform & Strong Tack Coat
Foundation
Basement
Walls & Roof

Advantages:

Easy and uniform spray
Ready to use
Saves energy as not require heating
No atmospheric pollution during road laying or maintenance
Less road maintenance cost
Highly adhesive properties
Water resistant and enhances easy drainage of water Low temperature curing
Enhances structural strengths of layers
Prevents lateral movements of structural layers
Provides an impervious layer to prevent water ingress from water table below the road layers

Tack Coat :

An application of bituminous material applied to an existing, relatively non absorbent surface to provide a through bond between existing and new surfacing.

Objectives :

To ensure a proper bond between existing surface and the new bituminous course being placed over it.
To ensure long life of the road, it is important that the new bituminous surface bonds firmly with the underneath surface.
To coat and bond loose mineral particles on the surface of the surface layer.
To seal surface pores and make the surface water resistant.
To impart structural stability and prevent lateral movement of layers.
To assist adhesion between the base and the super imposed surface course.

Rate of application of Tack Coat

Surface Type	Qty in kg per 10 m sq. Area
Normal bituminous surfaces	2 to 2.5
Dry and hungry bituminous surfaces	2.5 to 3.0
Granular surfaces treated with primer	2.5 to 3.0
Non- bituminous surfaces Granular base ( not primed)	3.5 to 4.0
Cement concrete pavement	3.0 to 3.5

Some important specifications and properties are :as per ( IS – 8887:2004)

Penetration	80 – 150
Binder- residue by evaporation	Min 60%
Viscosity @ 50° C (Saybolt), sec	20 – 100
Storage stability after 24 hours % max	Less than 2
Setting time	~ 15 mins