Simple past tense and past participle of concrete.(verb)
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Use "concreted" in a sentence
"He looked round, twinkling, for a laugh to follow what he meant for a joke; and the obsequious bandsmen uttered a sniggering kind of concreted grin, followed instantly by a loud-toned sonorous _Phoomp_! from the huge bell-mouth of the contra-bass."
"Police have said the site will be sealed off by roadblocks from today, but the fight was still going on yesterday, with council and Travellers embroiled in a new war of words over who first concreted over the site where some of the families have been for the past decade."
"It is impossible not to think of Ian Botham, who stayed concreted in at No6 even as his career congealed."