Calcium chloride is designed to melt ice on driveways and sidewalks at very low temperatures. While this is a better de-icer for plants, it is more corrosive to metals and may damage vehicles parked on the driveway. However, it is very effective and will begin melting ice immediately upon contact. It's important to wear gloves when applying calcium chloride because it can irritate skin.
Rock salt is the most common, and inexpensive, method used to melt ice on city streets and driveways. Rock salt takes some time to work and is corrosive to asphalt, concrete, plants and cars. However, it will not harm humans or animals.
Heated driveway systems are designed to keep cement or asphalt free from patches of ice and snow. A system installed underneath the driveway monitors moisture and temperature, and will be activated when ice develops. This system reduces maintenance costs, increases property value and ensures driveway safety. These systems are expensive and can only be installed if a driveway is being constructed or remodeled.
Alfalfa meal is an environmentally friendly de-icer that will melt driveway ice and keep nearby plants and grass healthy. According to Pays to Live Green, alfalfa meal contains nitrogen that will help melt ice and provide better traction. Typically, alfalfa meal is an organic plant fertilizer used to help rebuild soil and plants grow.