Necessary to remove pavement striping before paving?

[CEPEJack]

The roads on our project will be constructed at the beginning of a multi-year phased construction project. The owner has opted to place the final pavement lift at the end of the project (probably 3 years after the first pavement lift is placed). We are going to stripe the roads with the initial pavement lift. Striping will be glass-bead, non-thermoplastic paint.

Is it necessary to remove this striping prior to placing the final overlay? My hunch is that it's okay not to - cleaning the road of debris and a good tack coat will provide sufficient bond between the initial pavement lift and final overlay lift. Am I missing something?

Thanks!

 

[Ron]

After 3 years of weathering, should be OK. If thermoplastic...remove it.

 

[GeoPaveTraffic]

I agree with Ron.

Mike Lambert

 

[hokie66]

On the subject of pavement striping, I often see cracking along the edges of the lines. The lines are white, and the asphalt is black, so I assume it is thermal cracking. This is on relatively thin layers, e.g. rural roads, sports courts. Is this from using inappropriate coatings, or what?

 

[Ron]

hokie66....you are correct. It is thermal related, but mostly a weathering issue from differential heating. The asphalt volatizes through its life, more in the early part than laters. The stripes are paint....they are also white or yellow, so the absorb less heat. Further, they protect the asphalt underneath so that it gets less weathering than that surrounding the stripes. Result is shrinkage of the asphalt from the weathering, causing a separation or crack at the stripe interface.

 

[hokie66]

So are there solutions to this problem? Are there better materials which minimize this problem, or it is just inevitable that this will happen with time?

 

[Ron]

I don't know of any solutions thus far. Many materials have been tried, but the resistance to traffic abrasion wins out over the shrinkage issue.