When cement is mixed in combination with water, sand, stone or similar materials, it forms a hard solid mass known as concrete.
(cement; is; mixed; L:in combination with water, sand, stone or similar materials) (it; forms; a hard solid mass known as concrete; T:When cement is mixed in combination with water, sand, stone or similar materials) (a hard solid mass; known; as concrete)
cement it a hard solid mass
is forms known
mixed L:in combination with water, sand, stone or similar materials
a hard solid mass known as concrete T:When cement is mixed in combination with water, sand, stone or similar materials
as concrete