Is this a question or a statement?
concrete has gravel added to the mix...when you add sand to cement you get cement...the strength comes from the ratio of sand to the cement...gravel is added to make concrete because its costs less as a filler...
Concrete is the finished product that results from mixing cement, sand or gravel and water. In other words, the difference is that cement is one component of concrete. Put another way - What is the difference between bread and flour?
The difference between concrete and cement is that concrete contains cement plus sand and gravel. It is the cement that binds the sand and gravel or crushed rock together to form what we call concrete. Concrete then, is more than just cement. Cheers and good luck!
