Reinforced Autoclaved Aerated Concrete: what is it, what was the problem and where are we up to?

Overview

Reinforced Autoclaved Aerated Concrete (RAAC) was produced as a ‘lightweight’ plank used on many structures to form roofs and walls of structures. In 2017 RAAC panels collapsed on a school in Bolton. In 2018 a further collapse happened in Kent. This resulted in a Standing Committee on Structural Safety (SCOSS) alert, the IStructE expert group formation and a flurry of research. 

During this event, our speaker Chris Atkins will present a review of RAAC. This will cover the known collapses, when it was used and when it stopped being used. Chris will also provide context on the RAAC collapses. He will then highlight the most common problems, what contributed to getting us here and what developments are in the pipeline for the guidance.

Finally, Chris will cover typical remedial options being used in practice. Some examples of control measures will also be discussed.