Proposed Concrete brick compatible with Precious Plastic brick

thingiverse

The attached files show proposed geometry and test segments for a concrete brick with teeth that should allow Precious Plastic bricks to be placed on top of it. The mold files are intended to test shrinkage of concrete, so as to work out compensation in the full sized mold designs, so that bricks retain accurate enough dimensions for inter-connecting. The full brick will have thicker walls, nearly all around, when compared to the Precious Plastic design, to help prevent cracking of the concrete. The interior facing wall of this brick has a large segment cut out from it, in order to demonstrate a potential use case scenario, as a type of block formwork, where concrete is poured between two courses of these bricks to produce a strip foundation or similar structure for construction.