What is a prime coat in construction?

A prime coat is the application of a suitable bituminous binder applied to a non-bituminous granular base as a preliminary treatment before the application of a bituminous surfacing. The purpose of this research is to establish practical applications of successful prime coats to replace cutback asphalt.

What is the function of prime coat?

The layer between Asphalt Course and Crushed Aggregate Base Course (CABC) is called Prime Coat. Its purpose is to bind the loose aggregates of CABC so that it can be prepared for subsequent construction activity of laying Asphalt layer.

What are the functions of prime coat tack coat and seal coat in bituminous construction?

Prime Coat, Tack Coat And Seal Coat

• Prime Coat :
• Purpose : The purpose of the prime coat is to coat and bond loose material on the surface of the base course to harden or toughen.
• Tack Coat :
• Purpose : It behave like bonding coat between W.M.M or Asphalt layers.
• Seal Coat : It is placed top of the pavements.

What is prime coat and seal coat?

It provides bonding between two layers. Unlike the tack coat, prime coat penetrates into the layer below, plugs the voids, and forms a watertight surface. Seal Coat: It provides proper bonding between two layers of binder course and must be thin, uniformly cover the entire surface, and set very fast.

How do you calculate prime coat?

Specific Gravity of Prime Coat= 0.95. Calculate increase in Weight= (B-A) kg. Rate of Spray in Kg = (Increase in Weight)/(Area of tray) Unit of Rate of Spray in kg/sqm.

What is the thickness of prime coat?

For a normally clean environment, a coat of up to 50 microns is considered adequate. For a dusty or humid location requiring constant servicing and cleaning, a thicker coat, say, up to 70–80 microns, is considered to be adequate. A thickness of up to 50 microns is possible through one coat of primer and paint.

What is seal coat in road construction?

Definition of seal coat : a final coat of bituminous material applied during construction to a bituminous macadam or concrete for sealing the surface of the pavement.

What is prime seal?

Buy Online. Lanco® Prime-Seal™ is a acrylic polymer elastomeric primer specially designed to penetrate and waterproof concrete to prevent water infiltration throughout the roof or wall surface.

What are the objectives of Prime coat Mcq?

The purpose of providing prime coat includes coating and bonding loose materials, to harden or toughen the base surface and to plug the capillary voids.

How do you calculate prime coat amount?

What is the density of prime coat?

The Prime coat shall be applied uniformly to the surface of the base using a pressure distributor at a rate between 0.65 and 1.75 kg per square meter (For Oman, Standard Specification for Road and Bridge Construction 2010 application rate is 0.8 – 1.75 kg per square meter ) and at a temperature between 50℃ to 80℃ for …

What is the specific gravity of prime coat?

0.95
Specific Gravity of Prime Coat= 0.95.