Our research explores opportunities in using unaltered concrete rubbles from demolition for the digital construction of structural walls. Through research by iterative making, we identify relevant upcycling processes and design strategies and explore new tectonics specific to reclaimed concrete rubbles with non- standard variable geometries. This iterative research proposes accessible and scalable digitalprocessestoovercomethechallenges inherent to this untapped construction material. A full-scale prototypes was built as a first step in developping such constructive logic.