Open3DCP Data Standard for 3D Concrete Printing Records

Open data standard

Open3DCP is the public schema Sunnyday Technologies uses to describe 3D concrete printing mix-design and test records in a consistent, machine-readable way. CEMFORGE can consume Open3DCP-shaped records for formulation research and decision-support workflows where sufficient validated data are available.

Why this belongs on CEMFORGE

3D concrete printing is not defined by composition alone. A useful record also needs process parameters, specimen and test context, measured properties, and provenance. Without that structure, two values that look identical in a spreadsheet can describe physically different experiments.

Open3DCP gives those variables stable names, units, and context. That makes it easier to compare published work, prepare reusable datasets, and connect formulation decisions to print and test conditions without hiding missing values or forcing incompatible records into the same bucket.

Composition Binders, SCMs, aggregates, fibers, admixtures, pigments, water, and derived ratios.
Process Parameters Nozzle geometry, speed, layer height, time gap, extrusion conditions, and print context.
Specimen Context Geometry, curing, extraction, test age, method, and orientation relative to the printed layers.
Measured Properties Fresh-state behavior, rheology, strength, durability indicators, and interlayer bond where reported.
Provenance DOI, source, method, confidence notes, quality flags, and traceability back to the original record.
Reusable Dataset A flat record suitable for review, comparison, repository deposit, and downstream modeling.

Designed, then demonstrated

Open3DCP v1.7.5 defines 248 columns on a dual basis that keeps kg/m³ first-class. The whitepaper does not just specify the schema — it demonstrates it: five openly-licensed public datasets were ingested into one Open3DCP record — from a widely-used cast-concrete benchmark (100/100 fidelity with zero assumptions; 126 populated cells across its 9 source fields, unclassified constituents recorded generically) and a corporate carbon-aware set, to a real ~30-laboratory 3DCP interlaboratory study.

Because the schema records loading orientation, the combined record yields a cross-study result a composition-only table cannot express: printed concrete loaded along the print path is 32–55% weaker in flexure than the cast reference, in each of three independent single-lab datasets. The whitepaper fits no predictive model; it demonstrates ingestion and interoperability — the foundation a model would need.

Public, platform-agnostic, and versioned

Open3DCP is not a CEMFORGE-only format. The schema is public, versioned, and intended to be useful across laboratories, repositories, hardware platforms, and analysis tools. The current public release is Open3DCP v1.7.5.

CEMFORGE benefits from the same thing the broader field benefits from: records that preserve what was made, how it was printed or tested, what was measured, and where the information came from.

Read the whitepaper Visit Open3DCP.org View the schema reference

Open3DCP is a reporting layer, not a structural design method, code-compliance path, or substitute for physical validation. CEMFORGE remains a decision-support tool; construction use still requires appropriate testing, engineering review, and approval under the governing jurisdiction.

This is a summary. The canonical version of record is the Open3DCP whitepaper on open3dcp.org.