Clean Bond Coat in Foothills

Clean Bond Coat in Foothills


A municipality was looking for alternatives to emulsified prime to cap their pulverized, oiled roads.  They discovered that by fogging their oiled roads they can extend the life cycle of this network by up to 3 years.  The large drawback of using emulsified prime however, is setup time.  The typical application would see each road done in multiple days in order to keep a clear drive lane available at all times.

We substituted Clean Bond Coat (CBC) for the prime and judged it on a series of criteria:
  • Cost Effectiveness
  • Ease of use
  • Application time
  • Setup time
  • Total lane closure time

Clean Bond Coat (CBC) is the most state-of the-art anionic or cationic asphalt emulsion available for high performing tack coat applications. CBC is formulated for a fast cure, leaving a non-tracking tack coat minutes after application. Upon placement of the new hot mix asphalt, heat from the new layer will liquefy the residual high-modulus asphalt tack, and an excellent bond will be formed between the existing and new hot mix courses.

Cationic Emulsions

There are three major classifications of emulsion grades: rapid-setting, medium-setting, and slow-setting. The terms “rapid,” “medium,” and “slow” relate to the amount of time it takes for the emulsion to cure and the amount of mixing that can be performed before the emulsion breaks. Emulsions that allow for the longest mixing times generally take the longest to cure, while emulsions that allow for very little mixing time are those that set and cure most rapidly.

Chemical surface-active agents, serving as emulsifiers, are classified by the electrochemical charge that is attained when they dissociate in a water solution. In the case of cationic emulsions, the chemical charge is positive. The chemical type and quantity of surface-active agents used in the manufacturing process governs the process in which the resulting asphalt emulsion can be used.

Read MoreClick Here Read MoreClick Here
September 2020
Research PaperIcon copy