Autoclaved aerated concrete is quite different from dense concrete (ie: ânormal concreteâ) in both the way it is produced and in the composition of the final product. Dense concrete is typically a mixture of cement and water, often with slag or PFA, and fine and coarse aggregate.roduction. Autoclaved aerated concrete is cured in an autoclave-a large pressure vessel. In aircrete production the autoclave is normally a steel tube some 3 metres in diameter and 45 metres long.
The result is given in cubic inches. Engine displacement is the volume swept by all the pistons inside the cylinders of a reciprocating engine in a single movement from top dead centre (TDC) to bottom dead centre (BDC).
@user3663241: Also, note that the displacement of the engine means all pistons / cylinders at their maximum capacity, which -- due to the offset positions of the pistons -- means that at no point does a multi-piston engine actually hold its maximum displacement of volume.