We recently purchased a property with what appears to be a mineral deposit near the concrete curbs. There is quite a bit. It's not just a light coating but actual buildup. Doing some reading, I think this is efflorescence caused by minerals left behind after water evaporation. The attached pictures show a small portion of the area affected.
From what I read, this is often caused by watering vegetation adjacent to concrete curb. The water in our area is as soft as it gets. I have to *add* minerals to our water for our fresh water aquarium just so the fish will stay healthy. We are in the Northwest with about 9 months of rain out of the year. Even then, rain water is soft so what minerals are being left behind. Minerals from the soil? Lime from the concrete?
Most importantly, how do I clean this up?
The pictures here simply don't do justice to how widespread and ugly this is. I've read several web sites that recommend a 50/50 solution of vinegar and water. In total we are talking many pounds of this mineral deposit. I haven't tried it, but I doubt the vinegar water solution would work. It works OK on bathroom tile and aquariums but this is a thick layer. Even if it does, I think we are talking a substantial investment in vinegar!
Is this indeed mineral efflorescence? Any thoughts on how to clean up hundreds of linear feet of this stuff? Dilute sulfuric or hydrochloric acid? Would that harm the concrete or asphalt? A pick axe? A jack hammer? Black spray paint?
There is lots of this stuff and it's really stuck on that asphalt.