There are many types of concrete including foam concrete that has dry density between 400 and 1600 kg.
Foamed concrete can be produced with dry densities of 400 to 1600 kg/m (25 lb/ft to 100 lb/ft), with 7-day strengths of approximately 1 to 10 N/mm (145 to 1450 psi) respectively. Many other non-cementitious types of concrete exist with other methods of binding aggregate together, including asphalt concrete with a bitumen binder, which is frequently used for road surfaces, and polymer concretes that use polymers as a binder. 
