Concrete has been in existence in one form or another since Egyptian and Roman times. In 1756 the first modern mix using Portland cement was created and in 2006 domestic production reached 115 million tons. On a global scale China accounts for roughly 40% of the world concrete consumption.
Although it is one of the most used construction and building resources in the world, homeowners are scared to touch it. Popular Mechanics provides a thorough guide to using concrete that will have you laying slabs like a pro.