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The once wonder material reinforced aerated autoclaved concrete will cause chaotic start to academic year | Science & Tech News
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During the post-war building boom of the 1950s, 60s and 70s, reinforced aerated autoclaved concrete (RAAC) was something of a wonder material. Filled with bubbles of air, the material is about a quarter of the weight of normal reinforced concrete. RAAC was seen as ideal for shaping into lighter, pre-formed concrete components used in the…