“Don’t judge a road by its surface”
A road is composed of multiple layers of material, each performing separate functions, from providing stability and strength to allowing for proper drainage. The surface of the road – the part we see – is merely one of those layers.
Just as our own skin protects our bodies from harsh elements that can compromise our health, the surface layer of a road protects the integrity of the layers beneath, which in turn, extends the road’s overall service life.
When we speak about preserving a road, we’re not only talking about the surface people drive on but, more importantly, the integrity of what lies beneath the surface.
That is why roads are designed to receive periodic treatments to protect the integrity of its multiple layers of material. To do this, KCRC has a “toolbox” of surface treatments from which to choose. Treatment selection is based on a variety of factors, including the current pavement condition, the ride quality, and the volume of traffic a road carries.
Mill & Fill
Mill & Fill is a structural pavement treatment that involves the removal of the existing surface layer - and in some cases the entire asphalt pavement thickness - with a milling machine and the replacement of the milled location with new asphalt. This process is used when a surface has deteriorated to poor condition and surrounding grades (i.e. curbs, driveways) must be met.
Benefits: Mill & Fill restores and strengthens a road’s surface layer by restoring the pavement to a “like new” condition.
Challenges: The Mill and Fill process costs considerably more than preservation treatments like chip seal or micro surface. When a road has deteriorated to poor condition, pavement preservation treatments no longer provide long-term improvements and structural reconstruction is required.
What to Expect: The Mill & Fill process can take a few days to several weeks to complete depending on the length and width of the project. It is weather dependent, and multi-day lane closures, road closures and detours may be instituted.