for - Cycle Terre - https://www.cycle-terre.eu/en/ - https://circulareconomy.europa.eu/platform/en/good-practices/cycle-terre-excavated-soil-urban-areas-becomes-construction-raw-material - https://www.sme-enterprize.com/sustainability-stories/environment/cycle-terre/

description - The Cycle Terre project shifts perspectives - excavation material is no longer treated as waste to be disposed of, - but as a new raw building material for - compressed earth bricks - earth wall panels - earth coatings - https://www.cycle-terre.eu/mise-en-oeuvre/les-materiaux/ - The excavation of kilometers of tunnels to extend the Paris mass transit system will produce enormous amounts of raw feedstock for the Cycle Terre manufacturing plant.- 400 million tons!

an obvious example of fragment/ ruins motif