The most common type of concrete used for sidewalks is a mix of portland cement, aggregate (stone or gravel), and water. Sand can also be added to make the concrete more durable.

There are a few different types of concrete that can be used for sidewalks, but the most common is called Portland cement. This type of concrete is made up of crushed limestone, sand, and clay. It dries quickly and is durable enough to withstand heavy traffic.