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).
College of Southern Nevada. Fast Facts. Overview. The College of Southern Nevada (CSN) is one of the most popular colleges in the USA. With over 38,000 students, CSN is the largest higher education institute in the State of Nevada, and the 7th largest community college in the USA.