Concrete Bridge decks are notoriously difficult and expensive to maintain because of water penetration and wide temperature fluctuations. Inspection of bridge deck surfaces usually reveals wheel ruts, asphalt fragments and concrete damage.

ASPHALTOSEAL® has been used as a barrier between the concrete and the blacktop to minimize the difference between the temperature response of the two materials. Additionally, heavy traffic, such as loaded trucks, will cause a bow wave, analogous to that produced by a ship moving in water, on the surface of even a rigid concrete bridge which again, adversely affect the surface quality of the deck.

ASPHALTOSEAL® can aid substantially in bridge deck surface maintenance. Initially, the deck must be cleaned down to the concrete when it should be inspected for damage from salt treatments. The concrete is then sealed to prevent further salt penetration, after which the membrane can be installed using a special Primer which affords a good adhesion of the membrane to the concrete deck- which provides 100% water seal and at the same time allowing gases in the concrete to escape.
A base asphalt is then laid on top of the membrane according to local specifications. This in turn is covered with a draining asphalt with open stones to minimize slippery conditions caused by rain or wet surface. Comparable procedures with ASPHALTOSEAL® can be successfully applied when water sealing underground tunnels and pedestrian subways and many other applications

Guidelines For Selection Of Emulsion Type

Application Rapid Setting Medium Setting Slow Setting
Penetration Macadam
Prime Coat
Tack Coat
Slurry Seal
Fog Seal
Soil Stabilisation
Surface Dressing
Dust Binding
Crack Filler
Cold Mix
Mulch Treatment


Paving Bitumen (Straight Grade)- shall be prepared by the distillation of suitable crude, petroleum oil without subsequent blending with other grades. The material shall be homogenous and shall not foam when heated to 175 °C. No mineral matter other than naturally contained in the material shall be present.

Recommended Use

Sr.NO. Test Parameters VG-10 VG-30 VG-40 BIT 10/20
1 Absolute viscosity at 60°C, poises, Min. 800 2400 3200
2 Kinematic viscosity at 135°C, cSt, Min. 250 350 400
3 Flash point cleave land open cup, “C, Min. 220°C 220°C 220°C
4 Penetration at 25°C, 100 gm5 sec, 1/10 mm 80-100 50-70 40-60 15 + 5
5 Softening point (R&B), “C., Min 40°C 47°C 50°C 65 + 10
6 Matter soluble in Trichloroethylene, % by mass, Min. 99 99 99 95%
7 Thin Film Oven Test, on Residue Viscosity ratio at 60°C,Max. 4.0 4.0 4.0
8 Ductility at 25°C, cm, after TFOT Min. 75 40 25
9 Loss on heating, oven test % by mass, Max. 2.0
10 Ash, % by mass, Max. 1.0
USES : Construction and maintenance of Roadways, Saturant for roofing felt, electrical cables for manufacturing Bitumen Emulsions etc.