Tack coats are bitumen emulsion additives that create a bond between the layers of bitumen emulsion and the underlying surface to increase the track resistance. Tack coats are meant to form a strong bond and lower the bitumen residue.
With the help of a sprayer or distributor truck, a tack coat is uniformly sprayed on the top layer of an existing asphalt. Tack Coats are used before overlaying as well as before laying the wearing course. A tack coat should be given adequate time to cure and get tacky, which usually takes few minutes. Tack coats are designed to form a strong bond between the two layers of asphalt by preventing the slippage of the two layers.
By offering an effective adhesion between the two asphalt layers, tack coats thereby provide the desired structural integrity to the asphaltic layers. After an asphaltic layer has been laid, tack coat is provided so that both the layer bonds together, for smooth and effective flow of traffic. Several additives for tack coat also reduce tire pick up, which results in a trackless tack asphalt surface.
What makes tack coats an absolute necessity?
Every time we commute, we come across several distorted areas of roads on which the top black surface has slipped off. It becomes tough for drivers to steer their vehicles on roads with such uneven surfaces. While climatic conditions and traffic also play a role for such road damage, the main cause is the lack of application of a tack coat before the new overlay. Tack coat helps in adhesion of the overlay and the underlying pavement surface. If the layers are not bonded together, the interface weakens, and the pavement fails under heavy traffic loading and water ingress.
NanoTac, from Zydex Industries, is a revolutionary and high-performance cationic bitumen emulsions that forms permanent chemical bond between the bitumen and underlying surface. This offers very high bond strength even at lower residual bitumen content, which enables a significant cost saving on both milled and unmilled surfaces. The strong adhesion due to NanoTac also ensures trackless tack asphalt surface.
For more information on NanoTac and other road solutions from Zydex, call: 1800-3000-7144 or visit: www.zydexindustries.com