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Lime milk (also known as milk of lime or lime slurry) is a protective agent often applied over tack coats in road construction to prevent issues like contamination, tracking, and dust adhesion. Tack coats are thin layers of bitumen applied between layers of asphalt to ensure proper bonding, but they can sometimes be damaged or compromised by traffic or environmental factors before the top layer is applied. Lime milk serves as a temporary protective barrier, keeping the tack coat intact until
the subsequent asphalt layer is laid.

Lime milk works by forming a fine, stable film over the tack coat, which helps prevent dust and debris from sticking to the surface. This is essential because any contamination can reduce the bonding strength between the layers of asphalt, leading to potential failures such as delamination or cracking. Additionally, lime milk reduces the problem of "tracking”, where tack coat material sticks to tires and is dragged away, leaving bare spots that weaken the pavement structure.

Since lime milk is a water-based suspension, it evaporates once the top asphalt layer is placed, leaving no residue. This makes it an effective and environmentally friendly solution for protecting tack coats. Its white colour also helps to prevent urban heat islands and bleeding caused by high temperatures.

Products

Applications

ValoChem’s solution, called Adhefend^TM C45, offers several advantages:

Application benefits:

• Preventing vehicle tyres from tearing off the bitumen
• Work site cleanliness
• Nozzle clogging prevention – easy water cleaning of the spraying system
• Reduction of urban heat effects

Adhefend C45 advantages:

• Longer storage stability – up to three months without agitation
• Micronized particles to obtain homogenous product

Lime milk