Use of harsh chemicals or salt on driveways or walkways is not recommended. Doing so can cause chipping/pitting and may damage the surface. Take special care with new concrete and asphalt, which are especially susceptible to damage from salts and chemicals (as are new plantings and landscaping).
There are “Ice-Melt” products available that can be less damaging to concrete and asphalt surfaces. Read the labels carefully if you are considering using them.