We are experiencing some failures in our pavements that were coated with solar reflective coatings (Street Bond) ( See also attached photo. Basically, when we turn the wheels on the spot, the coating is peeling off. This happened during the summer season (about 34 degrees C). We are thinking that we need to let the asphalt to cure (together with the coating) enough so it does not soften under high temperatures (in same areas we let the asphalt (plus the coating) to "set" for long periods of time (3+ months) and we did not have this issue. Or perhaps the AC mixture should be specially designed in order to receive this coating. In areas where we do not have this coating, the same asphalt with the same traffic conditions does not fail. Do you have any experiences using solar reflective coatings? What are the typical AC mixtures that you use for coated pavements? Any input will be greatly appreciated. Thanks !
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Solar reflective coating in flexible AC pavements
- Thread starter Okiryu
- Start date
Painting the pavement to make it look new or for some other reason may seem like a good idea, but be prepared for treatments like this to come off or wear out. I'd expect you won't get much sympathy from old timers here who "have seen it all". Did you research the past history and performance of these coatings before buying it? By the way asphaltic pavements don't cure. Flexible pavements fail from the bottom up,so surface treatments pretty much are a waste of money in my opinion. Crack filling is an exception, it is a useful way to extend life of the older pavements.
amlinerrichard
Civil/Environmental
Seal coating AC pavement will keep the AC cooler. Spray on the AC binder mix and cover with granite chips. Then roll it very well. It will be gray instead of black. Keep traffic off for a day or 2. This also improves traction.
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