Reinforced autoclaved aerated concrete (RAAC) refers to AAC cast with steel reinforcement, which was used in construction in the UK and parts of Europe in buildings constructed from the mid-1950s to 1980s. Main article: Reinforced autoclaved aerated concrete In addition to their quick and easy installation, AAC materials can be routed, sanded, or cut to size on-site using a hand saw and standard power tools with carbon steel cutters. Exterior construction requires some type of applied finish, such as a polymer-modified stucco or plaster compound to guard against the elements, or covered with siding materials such as natural or manufactured stone, veneer brick, metal or vinyl siding. Lightweight concrete is used, for example, for exterior and interior walls, firewalls, wet room walls, diffusion-open thermal insulation boards, intermediate floors, upper floors, stairs, opening crossings, beams and pillars. ĪAC products can be used in almost all construction, such as industrial buildings, residential houses, apartment buildings, and townhouses. Additionally, AAC is resistant to fire and mold, making it a safe choice for construction. It is also an excellent insulator that can help reduce energy costs by keeping buildings cool in the summer and warm in the winter. AAC is a highly durable material that can last for many years without requiring maintenance. Forms include blocks, wall panels, floor and roof panels, cladding (façade) panels and lintels.
Developed in the mid-1920s, AAC simultaneously provides structure, insulation, and fire- and mold-resistance. AAC products are cured under heat and pressure in an autoclave.
It is composed of quartz sand, calcined gypsum, lime, portland cement, water and aluminium powder. Palette stacked autoclaved aerated concrete blocks.Īutoclaved aerated concrete ( AAC) is a lightweight, precast, cellular concrete building material, eco-friendly, suitable for producing concrete-like blocks. Sectional view of autoclaved aerated concrete. For lightweight blocks, see Expanded clay aggregate.
For cellular concrete (foamed concrete), see Types of concrete § Cellular concrete.
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