If burning or pain is felt, see a doctor immediately. For simpler problems like dried, cracked skin, a protective ointment will help. Admixtures are used in concrete to give it different properties such as longer or shorter curing times. One of the most common admixtures is an air entraining compound. It is added to make concrete more durable when exposed to freezing temperatures.
Most sidewalks contain air entrained concrete.
These materials are added in extremely small amounts and generally don't cause any negative health effects. However, for people who are hypersensitive to synthetic chemicals, they have been shown to cause some problems. For example, a woman reported that whenever a concrete patio was warmed by the sun she was bothered by a chemical odor given off by the slab. Even among sensitive people, concrete is usually well tolerated, but when contractors work with such people, it is important to find out if any admixtures are used in the concrete. If you found this article helpful, you'll want to check out our books and videos , all of which contain a wide variety of in-depth information.