Example entry · extrusion 3D-printed concrete
UF 3DCP Mix-Design → Open3DCP
The genuine extrusion-3DCP slice: printable Portland mixes with the fresh-state rheology that governs printability — and an honest illustration of a basis mismatch (ratio-to-binder, no kg/m³) that the connective layer exists to span.
1 · Native structure
Storage medium: a single flat table (.xlsx), one row per mix, constituents
on a ratio-to-binder basis (binder = 1) — no absolute kg/m³ content. The fresh
rheology and strength fields are absolute and unambiguous.
| Source field (data class) | Unit | Role |
|---|---|---|
| Binder1 + SCM "to binder ratio" | ratio | binder system (binder = 1) |
| Water-Binder Ratio | ratio | w/b (absolute, unambiguous) |
| Sand-Binder Ratio | ratio | aggregate loading |
| Static · Dynamic Yield Stress | kPa | printability (buildability / extrudability) |
| Plastic Viscosity | Pa·s | fresh-state flow |
| Compressive strength at 1/3/7/28 d | MPa | hardened result |
Why constituents stay NULL here. Because the source gives only ratios to
binder with no kg/m³ binder dosage, a constituent mass-% of the total mix cannot be formed without
inventing a binder content — so we don't. The mix-design columns beyond
w_b_ratio and the
binder system stay NULL. The missing data class is not a defect; it is exactly the gap a connective
schema is built to span — UCI and Meta supply kg/m³ mass design, this source supplies the printability
rheology, and Open3DCP holds both in one shape.2 · Re-formatting into Open3DCP
3 · Result in Open3DCP
hand-curated
Score deferred — like the RILEM example, this is hand-curated via the
source's ratio-to-binder structure; an automated
open3dcp-ingest ratio-to-binder reader
(which would also emit a fidelity score) is a planned follow-up. Values are real; nothing is synthesized.
Digital-twin coverage
Provenance▢
Mix design◐
Rheology✓
3DCP process✓
Hardened mech.✓
Multi-age▢
Durability▢
Environment▢
Curated rows (excerpt)
Yield stress (the printability control) vs strength, across primary studies. Full file: uf-3dcp-mix.open3dcp.csv.
| w/b | static yield (Pa) | dynamic yield (Pa) | plastic visc. (Pa·s) | age (d) | fc (MPa) |
|---|---|---|---|---|---|
| 0.30 | 2411 | 260 | 19.0 | 28 | 42.0 |
| 0.30 | 3350 | 500 | 16.7 | 28 | 49.7 |
| 0.40 | 1200 | — | — | 28 | 60.0 |
| 0.35 | 398 | — | 34.0 | 28 | 54.0 |
4 · How this was built
python build/extract.py "3D concrete printing mix design dataset v0.3.xlsx"
# → uf-3dcp-mix.open3dcp.csv (kPa→Pa; ratio-to-binder basis noted per row)A sample, not a re-host. Source © the UF authors, CC BY 4.0 — see NOTICE. Get the full table from the DOI.