SpaceCrete : zero-slump concrete that pumps easily - to build walls with no forms. Rapid 3D print

Please see our more recent videos !!    • SpaceCrete Concentrate:  pumpable-zero-slu...   https://spacecrete.com/ This method allows concrete, modified with 3D-Admix, to be pumped into place to build walls without forms. Readymix concrete is delivered to the jobsite, then thickeners and accelerators as required are injected and intermixed in the pumping line, to give the fluid concrete the zero-slump-with-workability properties that you can see here. These test projects use normal-weight aggregates and no fibers - not having fibers and lightweight aggregates makes the zero-slump-pumpability more of a challenge. These test projects are done with a 1970's Mayco grout pump, not known for being suitable for pumping stiff mixes. This system makes that possible and easy. With a more powerful pump, this method will be much faster, easier, cleaner, and less expensive than shotcrete. The mix at the video beginning is particularly suited for 3D printing. It is made with concrete ordered from a batch plant, at a very much lower cost than usual 3D print mixes, and we can keep an "open" time of several hours, if needed. We are "printing" it with a $2500 pump.