Concerns raised over exploding concrete

Concerns have been raised in the construction industry over the safety of foam concrete containing IBA (incinerator bottom ash). Contract Journal has reported that at least two contracting firms have now banned the use of foam concrete containing IBA after two separate explosions which resulted in injury to employees.

One incident at a pumping station in Mill Green, Hertfordshire left two Barhale workers with fractured ankles and feet. Another smaller explosion in Dudley occurred involving Enterprise staff carrying out roadworks. Both firms have now stopped using foam concrete containing IBA.

 

The substance is widely used in the industry, particularly for utility trench filling and road construction. Engineering firm Barhale believes that the IBA product generates hydrogen gas after concrete mixing.

 

A spokesperson for Ballast Phoenix, a producer of IBA, told Contract Journal that it was too soon to say whether IBA had caused these explosions and that it was a safe product if used correctly.

 

The HSE is investigating the explosions.