Design Of Concrete Structures By Nilson Darwin And Dolan . Concrete Design Ideas, Contractors and Pictures - The If you're planning for new concrete or you're rejuvenating an existing surface, you'll find custom concrete ideas throughout the pages of The Concrete Network. Concrete - Wikipedia Concrete is a composite material composed of coarse aggregate bonded together with a fluid cement that hardens over time. Most concretes used are lime-based concretes