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).
Spring Hill College (Mobile, AL) Spring Hill College is one of the oldest Roman Catholic universities in the southeastern U.S. Founded by the Jesuit order and located in Mobile, Alabama, this small liberal arts college was established in 1830, making it the fifth-oldest Catholic college in the country.