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.
Patriot Act. noun. a U.S. law enacted in response to the September 11, 2001 terrorist attacks, which gave law-enforcement officials greater ability to tap telephones and track Internet users; also called [The Uniting and Strengthening America by Providing Appropriate Tools Required to Intercept and Obstruct Terrorism Act of 2001]