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Foamed concrete explosion – HSE Investigation Concluded

This document provides an update to information published by HSE on 3 December 2009 following an explosion in August 2009 involving foamed concrete in which two persons were injured.

A contractor had filled a pit to a depth of some 6m with foamed concrete. Whilst this was setting, workers started to remove steelwork using angle grinders.  There was then an explosion beneath a steel walkway on which two contractors were standing, and this blew the steel plates and the workers up into the roof of the building.

More information: Foamed concrete explosion – HSE Investigation Concluded