Additive Manufacturing with Desert Sand
Construction sand is running short worldwide while desert sand exists in abundance — yet it was long considered unusable. JSTec developed a novel powder printing process, including its own robotic hardware, to process extremely coarse granulates additively.
From Limitation to Innovation
After water, sand is the most heavily used raw material on earth. Construction and conventional manufacturing, however, require angular construction sand whose grains interlock. Fine, rounded desert sand was entirely unsuitable for such applications.
The same was true for established powder-based 3D printing: binder jetting depends on highly specific, fine powders, because conventional recoater systems cannot handle coarse granulates. JSTec took on this limitation and developed an entirely new system architecture for the powder bed process.
A purpose-built robot kinematic and an adapted binder jetting system now allow irregular and, above all, coarse grain sizes to be deposited homogeneously layer by layer and bound permanently. The result is dimensionally stable, complex structures — printed from a virtually inexhaustible resource.
Solving Resource Scarcity Through Technology
The primary goal was not to build yet another 3D printer, but to achieve a genuine material synthesis. The point was to prove that technological adaptations in mechanical engineering can circumvent global resource problems.
Being able to print desert sand opens up new supply chains for design objects, architectural elements and complex casting moulds. Dependence on expensive, standardised printing powders is severed and replaced by a sustainable, locally available medium.
The Results in Detail
The printed objects demonstrate what the process can do: delicate spiral structures show the strength of the binder, porous organic bodies the freedom of form — and even small figurines reproduce astonishing detail despite the coarse grain. A material the industry had written off as useless becomes a viable feedstock for additive manufacturing.
