I've noticed over the past few years that my concrete driveway is slowing eroding away. I've read the road/rock salt can erode concrete, so I'm attributing the cause to salt.
Source of salt: I don't add salt much, but the city sprays it over the driveway regularly and there is often salty runoff from the car. In short, I can't think of a way to avoid the salt.
Any ideas how to minimize this effect without buying expensive sealants/treatments?