{
  "schema": {
    "name": "Open3DCP",
    "version": "1.7",
    "record_type": "open_benchmark_mix_prediction",
    "is_synthetic": true
  },
  "record_id": "cmc_open_hpc_3dcp_reference_2026_07",
  "record_version": "2026-07-19.review2",
  "title": "High-binder fly-ash and silica-fume 3DCP research candidate",
  "generated_at": "2026-07-19T22:18:00.000000+00:00",
  "input": {
    "target_strength_mpa": 60,
    "materials": [
      "Cement Type 1",
      "Fly Ash",
      "Silica Fume",
      "Fine Sand"
    ],
    "application": "3D concrete printing research reference"
  },
  "mix_design_kg_m3": {
    "cement_type_1": 579,
    "fly_ash": 165,
    "silica_fume": 83,
    "fine_sand": 1278,
    "water": 185,
    "superplasticizer": 8.33
  },
  "predicted": {
    "compressive_strength_mpa": 67.32,
    "flexural_strength_mpa": 8.95,
    "splitting_tensile_mpa": 6.34,
    "tensile_strength_mpa": 4.59,
    "density_hardened_kg_m3": 2209.55,
    "setting_time_initial_min": 35.49,
    "yield_stress_pa": 672.89
  },
  "water_binder_ratio": 0.224,
  "confidence": 38,
  "model_release": "CEMFORGE-2026.06",
  "model_source": "onnx_inference_pro+ml_density_hardened_kg_m3_flexural+specialist(5)",
  "design_adjustment": {
    "parameter": "Fine sand",
    "adjustment_percent": 3,
    "basis": "Relative increase from the cited CC BY high-performance reference formulation"
  },
  "provenance": {
    "primary_reference": {
      "title": "Evaluation of suitability for 3D printing of high performance concretes",
      "doi": "10.1051/matecconf/201816301002",
      "url": "https://doi.org/10.1051/matecconf/201816301002",
      "license": "CC BY 4.0"
    },
    "corroborating_reference": {
      "title": "Automation in the Construction of a 3D-Printed Concrete Wall with the Use of a Lintel Gripper",
      "doi": "10.3390/ma13081800",
      "url": "https://doi.org/10.3390/ma13081800",
      "license": "CC BY 4.0"
    },
    "historical_lineage": {
      "title": "Mix design and fresh properties for high-performance printing concrete",
      "doi": "10.1617/s11527-012-9828-z",
      "url": "https://doi.org/10.1617/s11527-012-9828-z",
      "license": "CC BY-NC-ND 4.0 repository manuscript; cited only, not adapted or redistributed"
    }
  },
  "license": {
    "name": "CC BY 4.0",
    "url": "https://creativecommons.org/licenses/by/4.0/",
    "scope": "Sunnyday Technologies LLC original presentation, CEMFORGE prediction metadata, and this derivative record. Third-party works retain their stated licenses."
  },
  "record_fingerprint": "cmc_360ef9d2407c32fbbd8bf9c6f15996ec",
  "notice": "CEMFORGE predictions are decision-support estimates, not laboratory measurements or guarantees. This research candidate is not a production batching instruction, stamped design, code-compliance determination, or engineering approval. Materials, equipment, environment, curing, geometry, and test method can materially change outcomes. Physical validation and qualified review are required before real-world, structural, safety-critical, or production use.",
  "access": {
    "price": "free",
    "commercial_entitlement_required": false,
    "note": "This openly licensed source record is available without buying mix_card_1. The optional paid SKU covers a separate maintained hosted-delivery service."
  }
}