Structural Concrete Insulated Panel (scip)

 In 3D Printing, an extrusion device (a 3D Printer) squeezes a paste-like bead out of a moving nozzle in stacked lines. In 3D Shotcrete construction, concrete is sprayed on the insulating core material at high velocity, allowing for non-planar deposition, better bonding to irregular surfaces and curves,  and the creation of complex overhangs without temporary supports. 

No. As with other shotcrete applications 3D Shotcrete typically uses fine mortar blends with specialized chemical admixtures (like accelerators) to ensure rapid setting times—often hardening within several minutes—so the material holds its shape immediately upon deposition.

No. Steel reinforcement is spaced just off of the insulating core material and the shotcrete is deposited through and onto it, encasing it in the finished concrete layer. While it reduces or even eliminates the need for wooden or metal forms, structural projects still require steel reinforcement or, sometimes, fiber reinforcement for load-bearing code compliance. 

High-quality shotcrete routinely achieves compressive strengths of 4,000 to 8,000 psi (28 to 55 MPa) or higher depending on the specific mix design, meeting or exceeding traditional cast-in-place standards.

Adoption is growing, backed by evaluation pathways like the ICC-ES AC509 criteria for 3D concrete. Building department approvals still often require project-specific structural design,  sampling, and testing for local jurisdictional sign-off.