Mundic was used from the 1690s to describe a copper ore that began to be smelted at Bristol and elsewhere in southwestern Britain.
Smelting was carried out in cupolas, that is reverberatory furnaces using mineral coal.
The Cornish word mundic is now used to describe a cause of deterioration in concrete due to the decomposition of mineral constituents within the aggregate.
The notes go on to state that testing should be confined to buildings which contain concrete elements (blocks or in situ) and that were built in or prior to 1950.
However, the notes contain advice that testing may be required where there are visual or other signs of mundic decay.