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.
The Civil Rights Act of 1875, sometimes called Enforcement Act or Force Act, was a United States federal law enacted during the Reconstruction Era that guaranteed African Americans equal treatment in public accommodations, public transportation, and prohibited exclusion from jury service.he Civil Rights Act of 1875, sometimes called Enforcement Act or Force Act, was a United States federal law enacted during the Reconstruction Era that guaranteed African Americans equal treatment in public accommodations, public transportation, and prohibited exclusion from jury service.