0
The Concretes - album - was created in 2004.
Chosen One - The Concretes song - was created in 2005.
For normal concretes it should be 2400kg/m^3 but for lightweight concretes it should be 1750kg/m^3.
Concretes from grade M-60 to M-80 are called as high strength concretes as per IS 456-2000
66