Scoria
Iron and Steel bridges: condition appraisal and remedial treatment (CIRIA C664), published by CIRIA in 2008 defines scoria as a: ‘Larva-like material used for filling (bodging) defects in cast iron.’
The second edition of The Dictionary of Urbanism by Rob Cowan, published in 2020, suggests that a scoria block is: ‘A particularly durable and robust block, used for building and paving, made (from the eighteenth century onwards) from scoria (the residue of metal-smelting processes). Scoria is Ancient Greek for excrement.’
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