Скачать или смотреть SCIP: Test of non-spray concrete onto Structural Insulated Concrete Panels (for robotic placement)

Some leftover SCIP pieces became motivation to test how delivered concrete with 3D-Admix works on them (without doing any spraying). The main take away is that a thin application (less than 2") cannot really be vibrated internally, so a vibrating screed or darby, providing external vibration, is the best consolidation method. This concrete application will become digitally-controlled, to save cost.

Structural Concrete Insulated Panels panels were invented in California by Victor P. Weismann in Pasadena, who was granted the first patent for the concept in 1967. The system was initially called "thin-shell sandwich panel" construction and uses a foam core with wire mesh on both sides (connected by diagonal tie wires through the foam), which is then coated with concrete (shotcrete or mortar) on both sides, creating a structural-composite wall or roof panel.

SCIP is a brilliant idea, having outstanding structural efficiency and durability for withstanding natural disasters, making it a natural choice for hurricane-prone areas. The construction normally involves spray application of concrete or mortar on both sides - and the process can include roofs/ceilings. However, the shotcrete process requires a surprising amount of labor, to both apply and finish off acceptably; and there is a lot of surface area (inside and out) along with window openings etc to deal with.

The preliminary testing in this video is our first step in developing a 100% digital process to clad the panels (vertical and horizontal) with real concrete in the most efficient manner possible, to make this more robust and durable construction cost-competitive with stick framing, while also being of more consistent quality. Our process can use conventional low-cost delivered concrete (including coarse aggregate), in lieu of needing any onsite mixing/batching. The 3D-Admix dose is typically around 0.25% of total concrete volume (half-gallon per cubic yard), which is dosed and intermixed inside the concrete pump line. 3D-Admix is a high density of thickening solids carried in a liquid shrinkage reducing agent, so concrete shrinkage can be significantly reduced.