{
    "title": "Concrete Canvas",
    "inventor_name": "William Crawford, Peter Brewin",
    "publication_year": null,
    "device_name": "Concrete Canvas",
    "goal": "Provide a flexible, concrete-impregnated fabric that hardens on hydration to create thin, durable, waterproof and fire-resistant concrete structures without the need for traditional mixing plant, enabling rapid deployment of shelters and civil-infrastructure elements.",
    "problem_addressed": "Slow, labor-intensive conventional concrete construction; need for heavy mixing equipment; high environmental impact of cement works; lack of quick-deployable hardened shelters for emergency or temporary operations.",
    "concept_summary": "Concrete Canvas (CC) is a 3-dimensional spacer-fabric matrix containing a dry cement-based powder. When water is added (by spraying, immersion, or capillary action) the powder hydrates and sets, turning the flexible fabric into a rigid concrete panel. A PVC backing provides waterproofing. The system can be formed into shelters (CCS) by inflating a lightweight inner membrane, then hydrating the outer fabric to create a hardened, load-bearing shell.",
    "detailed_description": null,
    "category": "Materials Science & Ceramics",
    "principles": [
        "Fiber reinforcement",
        "Hydration curing of cement",
        "Spacer-fabric architecture",
        "Inflation-shaped thin-walled structures",
        "Waterproof PVC backing"
    ],
    "scientific_domains": [
        "Civil Engineering",
        "Materials Science",
        "Construction Engineering"
    ],
    "mechanisms_of_action": [
        "Water penetrates powder particles -> cement hydration -> rigid concrete formation",
        "Pile yarns maintain spacing and provide reinforcement",
        "Inflation creates a pre-stressed shape that distributes compressive loads",
        "Capillary action and porous faces enable rapid liquid distribution"
    ],
    "materials": [
        "Cement",
        "Sand",
        "Fine aggregates",
        "Plasticizers",
        "PVC",
        "Polypropylene",
        "Coated glass fibres",
        "Nomex",
        "Kevlar",
        "Polyester",
        "Polyamide",
        "Microfibre"
    ],
    "energy_sources": [],
    "inputs": [
        "Water",
        "Air (for inflation)",
        "Dry cement-based powder mix (pre-loaded in fabric)",
        "UV radiation (optional for UV-settable formulations)"
    ],
    "outputs": [
        "Rigid concrete panel",
        "Waterproof, fire-resistant shelter shell",
        "Structural element for civil infrastructure"
    ],
    "claimed_performance": "Installation is faster, easier and more cost-effective than traditional concrete; environmental impact of concreting reduced by up to 95 %; shelters have a design life >10 years and are hardened from day one of deployment.",
    "experimental_evidence": null,
    "replication_status": null,
    "keywords": [
        "Concrete Canvas",
        "impregnated fabric",
        "hydration",
        "inflatable shelter",
        "civil infrastructure",
        "rapid deployment",
        "waterproof concrete"
    ],
    "related_technologies": [
        "Traditional concrete construction",
        "Inflatable emergency shelters",
        "Spacer fabrics",
        "Prefabricated concrete panels"
    ],
    "controversy_level": "low",
    "confidence_score": 0.9,
    "practicability_score": 0.8,
    "fringe_score": 0.1,
    "evidence_strength": 0.2,
    "risk_score": 0.1,
    "trl_estimate": 7,
    "source_urls": [
        "http://www.concretecanvas.co.uk"
    ],
    "organizations": [
        "Concrete Canvas Ltd."
    ],
    "applications": [
        "Ditch lining",
        "Slope protection",
        "Secondary containment bunds",
        "Emergency shelters",
        "Medical field structures",
        "Flood defences"
    ],
    "limitations": [
        "Requires water for setting",
        "Limited to thin panel thicknesses (5-13 mm)",
        "Performance depends on proper hydration conditions"
    ],
    "open_questions": [
        "Long-term durability under extreme environmental exposure",
        "Scalability for large-area structural applications"
    ],
    "red_flags": [],
    "evidence_quotes": [
        "Concrete Canvas (CC) is a flexible, concrete impregnated fabric that hardens when hydrated to form a thin, durable, water proof and fire resistant concrete layer.",
        "CC allows concrete construction without the need for plant or mixing equipment. Simply position the Canvas and just add water.",
        "CC is faster, easier and, more cost effective to install and has the additional benefit of reducing the environmental impact of concreting works by up to 95 %.",
        "CCS have a design life of over 10 years, whereas tents wear out rapidly and must then be replaced.",
        "The key to CCS is the use of inflation to create a surface that is optimised for compressive loading."
    ]
}