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Repairing Damaged Edging on Chip Seal

I am looking for methods for repairing damaged edging on Chip Seal roads. (Caused by trash trucks, mail delivery, aging, etc) Our chip ranges from ½” to 1 ¼” thick and the sides are Q. “beat out” sometimes into the drive . We have a limited budget. We tried cold/hot mix but it is labor intensive for our small crew and takes us off other projects. Any suggestions on methods, materials, equipment, or processes would be helpful.

A1) The problem with chipseal is that it is not a structure like so any that has only chipseal over gravel AND if there is any type of that extends past the chipseal, entities will A.always have trouble with the edges of the chipseal. The reason for this is because will utilize the whole road. The best thing to do is to plan to chipseal the entire surface of the road to the edge where the fore slope of the ditch begins. Traffic will be forced to move away from the edge thus saving the edge raveling that is experienced with chipseal on gravel. As for the fix, I use hot mix asphalt and we blade patch the edges just like your person is doing. Chipseal maintenance for edges should consist of using a motorgrader to pull material to the edges of the chipseal (being careful not to cut into the edges} and have the material moistened so the blade can wheel roll it. Keeping the edges built up is key to edge preservation.

A2) Chipseal have no structure so there are only a couple of ways that I have been involved in to repair them. • Saw cut edge and re chip with small dura-patch truck - make sure to tack the edge of the cut and over patch to incorporate the existing for at least 6 inches. • Cold / Hot mix patch shoulder • Depending on the extent of the edge damage you could try to shoulder the Chipseal road edge to protect it. All repairs will be time consuming but the saw cut and edge patch with the dura-patch truck takes the least amount of labor. Plowing is the enemy to the edges of roadways that only have a Chipseal surface, so keeping them shouldered helps.

A3) Referring to the Colorado Chip Seal Manual , which is a product of a CDOT Research Effort in 2013/2014, although it doesn't address any repair methods, it goes into detail on best practices for constructing a Chip Seal Project, as well as factors to consider prior to construction (traffic volumes, speeds, pavement condition, etc...) The deterioration described (chips 1/2" to 1-1/2" in depth) may be too much for a narrow chip seal repair, it may involve milling out the deteriorated area to a uniform depth and patching back, or perhaps placing a microsurfacing to the roadway to prevent further damage. Either is sure to be a costly repair.

A4) Our County does the same thing as the County in answer #2. We do have a few equipment attachments that help us out. One is on our dump trucks - we have an auger/sander to layout the hot mix along the edge of the road. Then we made an attachment to go on a road grader similar to a small box scraper to lay out the hot mix. During our Chip Sealing projects, we try to go back and chip in the area that we fixed, to seal it all together.

A5) CDOT deals with this issue constantly where traffic will beat the shoulder to a point that we have a huge drop off, we try to get this before the asphalt starts to break away. To correct this, we will come in and cut the gravel shoulder down 8 to 12 inches and follow up with roto-millings, compacting the millings stabilizing the shoulders. We then finish by reshaping our barrow ditch for proper drainage. We do this in our high impact areas and curves.