Concrete is a mixture of cement, water, sand, gravel, crushed rock, or other aggregates. Sometimes, one or more admixtures are added to change certain characteristics of the concrete, such as workability, durability, and time of hardening.
Top 100 Colleges by Highest Tuition. Here are the top 100 most expensive colleges by tuition for the 2008-2009 school year. The latest numbers can be found in our most expensive colleges ranking. Notes: Some colleges like Bates College, Colby College, Middlebury College, and Union College have a comprehensive fee (tuition + room/board).
North Carolina State University, located in Raleigh, North Carolina, currently has an undergraduate enrollment of 23,730, making it the state's largest university. It was founded as a land grant school in 1887 and has now been ranked #85 on US News and World Report 's list of America's Best Colleges.