A few years ago i made 4 lamps using concrete, as presents. I wanted to investigate the process of casting at the scale of the object.
I designed the forms on Rhino, lasercut the formwork from thin styrene sheets (1mm), used a hot glue gun to rapidly tack it all together, hold the formwork in place and plug any leaks. I then cast the voids, and combined the resultant concrete work with custom metalwork, papercraft and other lasercut elements to create these 4 lamps.
As prototypes these pieces were never going to turn out perfect, but the process of creating them has taught me a lot about working with concrete at such an intricate scale.