Production:

The several methods of producing lightweight concrete depend on :

(a) The creation of air voids in the concrete by omitting fine aggregates called as No-fine concrete.

(b) The creation of air voids in a cement paste by the addition of some substance which causes a foam called as Aerated or Cellular or Gas or Foamed concrete.

(c) The presence of air voids within the aggregate called as Lightweight aggregate concrete.

Types:

Below given are the types of lightweight concrete:

(a) Lightweight aggregate concrete

(b) No-fines concrete

(c) Air-entrained concrete