Autoclaved aerated concrete (AAC, Aircrete). Autoclaved aerated concrete is a versatile lightweight construction material and usually used as blocks. Compared with normal (ie: âdenseâ concrete) aircrete has a low density and excellent insulation properties.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.
Between 1870 and 1871 Congress passed the Enforcement Acts -- criminal codes that protected blacks' right to vote, hold office, serve on juries, and receive equal protection of laws.
In criminal law, an overt act is the one that can be clearly proved by evidence and from which criminal intent can be inferred, as opposed to a mere intention in the mind to commit a crime. Therefore, it is an act that, while innocent per se, can potentially be used as evidence against someone during a trial to show participation in a crime. For instance, the purchase of a ski mask, which can conceal identity, is generally a legal act but may be an overt act if it is purchased in the planning of a bank robbery. The term is more particularly employed in cases of treason, which must be demonstrated by some overt or open act.