Process information
| Key Data Set Information | ||||||||||||||||||||||||||||
| Location | GB | |||||||||||||||||||||||||||
| Geographical representativeness description | This declaration models the production in the plant Hardstone Average of Tarmac Holdings Limited in GB. | |||||||||||||||||||||||||||
| Reference year | 2025 | |||||||||||||||||||||||||||
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| Use advice for data set | Type of EPD: Cradle to gate with options, modules C1-C4, and D. Module A1: Production of ancillary materials. Module A2: Transportation to the quarry. Module A3: Aggregates extraction, crushing and sizing at the site and waste treatment. Module C1: Mechanical removal of unbound aggregates with a hydraulic excavator. Module C2: Transportation of the recovered aggregates to a reuse site. Module C3: Reuse of unbound aggregates in another similar project, re-laid using a hydraulic excavator. Module C4: No aggregates are expected to reach landfill. Module D: Credits from the avoided production of primary aggregates. Burdens: none (no further processing assumed). | |||||||||||||||||||||||||||
| Technical purpose of product or process | Tarmac’s hardstone is used extensively in real-world infrastructure projects where durability and safety are critical. It is used for motorways, dual carriageways, and urban roads, offering high skid resistance to reduce accidents in high-traffic areas. Local authorities and contractors rely on it for junctions, roundabouts, and pedestrian crossings, where surface grip is essential. Hardstone is also used in airport runways, railway ballast, and industrial yards, where its strength supports heavy loads and constant wear. Its consistent performance makes it a trusted choice for public transport hubs, logistics centres, and commercial developments across the UK. | |||||||||||||||||||||||||||
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| General comment on data set | Tarmac’s hardstone is used extensively in real-world infrastructure projects where durability and safety are critical. It is used for motorways, dual carriageways, and urban roads, offering high skid resistance to reduce accidents in high-traffic areas. Local authorities and contractors rely on it for junctions, roundabouts, and pedestrian crossings, where surface grip is essential. Hardstone is also used in airport runways, railway ballast, and industrial yards, where its strength supports heavy loads and constant wear. Its consistent performance makes it a trusted choice for public transport hubs, logistics centres, and commercial developments across the UK. | |||||||||||||||||||||||||||
| Copyright | Yes | |||||||||||||||||||||||||||
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| Data set valid until | 2030 | |||||||||||||||||||||||||||
| Time representativeness description | 2024 - 2030-07-22 | |||||||||||||||||||||||||||
| Technological representativeness | ||||||||||||||||||||||||||||
| Technology description including background system | Tarmac’s hardstone is a premium-grade aggregate known for its hardness, durability, and angular shape. It is sourced from specialist quarries across the UK, where the material is extracted through controlled excavation or blasting depending on site geology. Once quarried, the stone undergoes crushing, screening, and grading to produce a consistent product available in a range of sizes and specifications. With its naturally high polished stone value (PSV), hardstone delivers excellent skid resistance and long-term performance. | |||||||||||||||||||||||||||
Modelling and validation
| Subtype | specific dataset | ||||
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| Compliance Declarations | |||||
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Documentation compliance
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Quality compliance
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| Compliance |
Compliance system name
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Approval of overall compliance
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Nomenclature compliance
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Methodological compliance
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Review compliance
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Documentation compliance
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Quality compliance
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Administrative information
| Data generator | |
| Data set generator / modeller | |
| Data entry by | |
| Time stamp (last saved) | 2025-11-10T20:48:44 |
| Data set format(s) | |
| Publication and ownership | |
| UUID | d6b106d3-b252-4667-8e00-307aa3d68ebb |
| Data set version | 00.00.004 |
| Registration authority | |
| Registration number | NEPD-10158-10158-2 |
| Owner of data set | |
| Copyright | Yes |
| License type | Free of charge for all users and uses |
| Access and use restrictions | None |
Environmental indicators
Indicators of life cycle