Process information
| Key Data Set Information | |||
| Location | RO | ||
| Reference year | 2024 | ||
| Name |
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| Use advice for data set | Scope: The life cycle assessment is based on the consumption data of the Romanian Xella aerated concrete plant in Paulesti and the database for the year 2022. System boundary: Type of EPD: cradle-to-gate with options. Description of life cycle phases: Product stage (A1–A3) Raw material provision as well as truck transport of raw materials to the plant. Production inputs, in particular provisioning and use of energy carriers and auxiliaries, as well as packaging material. Treatment of production waste and wastewater. Stage of construction of the building (A4–A5) Module A4: Truck transport to the construction site (100 km). Transport distance can, where applicable, be adjusted at building level (e.g., for 200 km actual transport distance: multiply the LCA values by the factor 2). Module A5: Thermal packaging treatment and resulting credits in Module D. Scrap/off-cuts were not considered, as they depend strongly on the building context. Off-cuts can be approximately estimated using the declared values for the production stage (e.g., 5% off-cuts: multiply the LCA values by the factor 0.05). The installation of the products themselves is typically manual (no lifting equipment required). Mortar is not considered in this EPD. Use stage (B1) Recarbonation of reactive product constituents (e.g., CaO). A recarbonation rate of 95% is assumed (Walther 2022). End-of-life stage (C1–C4) Module C1: Mechanical dismantling (excavator). Module C2: Truck transport to waste processing facility (50 km). Transport distance can, where applicable, be adjusted at building level (e.g., for 100 km actual transport distance: multiply the LCA values by the factor 2). Module C3: (Scenario for material recycling): Waste processing and material recycling as filler material (including credits for substitution of gravel in Module D). Module C4: (Scenario for landfilling): Average emissions from landfilling. Credits and burdens outside the system boundaries (D) Credits from avoided costs due to substitution of gravel as fill material (from Module C3) and credits for energy substitution from packaging treatment. | ||
| Technical purpose of product or process | Unreinforced masonry units for masonry, monolithic, load‑bearing and non‑load‑bearing walls. According to the specification, direct contact with water is avoided during construction. | ||
| Classification |
Class name
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Hierarchy level
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| General comment on data set | The mentioned products are unreinforced blocks of different sizes made of aerated concrete. Aerated concrete belongs to the group of porous autoclaved lightweight concretes. | ||
| Copyright | Yes | ||
| Owner of data set | |||
| Quantitative reference | |||
| Reference flow(s) |
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| Biogenic carbon content |
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| Time representativeness | |||
| Data set valid until | 2029 | ||
| Technological representativeness | |||
| Technology description including background system | The ground quartz sand is mixed with lime, cement and crushed aerated concrete recycling material, with the addition of water and aluminium powder or paste, in a mixer to form an aqueous suspension and poured into casting moulds. The water dissolves the lime while generating heat. The aluminium reacts in an alkaline environment. This produces gaseous hydrogen, which creates the pores in the paste and escapes without leaving any residue. The pores usually have a diameter of 0.5 - 1.5 mm and are filled exclusively with air. After initial setting, semi-solid raw blocks are produced, from which the aerated concrete components are cut mechanically and with high precision. Technical data: See the Declaration of Performance for the respective product. The following table includes general data. Declared unit: The declared unit is 1 m unreinforced autoclaved aerated concrete of the raw density class 0.4 with a gross density of 383 kg/m. The average gross density was determined by averaging the data from the factory production control (FPC) in the reference year. | ||
Modelling and validation
| Subtype | specific dataset | ||||
| LCA methodology report | |||||
| Data sources, treatment and representativeness | |||||
| Documentation of data quality management | |||||
| Data source(s) used for this data set | |||||
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| Validation | |||||
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| Compliance Declarations | |||||
| 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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| Compliance |
Compliance system name
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Approval of overall compliance
|
Nomenclature compliance
|
Methodological compliance
|
Review compliance
|
Documentation compliance
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Quality compliance
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Administrative information
| Commissioner and goal | |
| Commissioner of data set | |
| Data generator | |
| Data set generator / modeller | |
| Data entry by | |
| Time stamp (last saved) | 2024-06-26T00:00:00 |
| Data set format(s) | |
| Publication and ownership | |
| UUID | 880239e9-ed96-404f-9184-bd4e004fd650 |
| Date of last revision | 2024-06-26T10:42:00+01:00 |
| Data set version | 00.03.001 |
| Registration authority | |
| Registration number | EPD-XEL-20240161-IBA1-DE |
| 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