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General comment This is a specific EPD describing KLB Isostar blocks; an unreinforced component with integrated insulation; manufactured from lightweight aggregate concrete block (LAC block) in various formats and sizes.
LAC block consists of natural aggregates, water, and hydraulic binders (cement). The product described here, with gross density classes ranging from 0.40 to 0.60 g/cm³ (400–600 kg/m³), represents all backfilled, lightweight plane blocks of this type manufactured at the plant.
Composition of product is available in the following table:
MaterialValueUnitCement17%Washed pumice 75%Wood fiber insulation boards4%Water4%
Technical data of the product is available in the following table:
Technical PropertyValues/ClassesStrength Classes (MPa)2, 4Bulk Density Classes (g/cm³)0.40, 0.45, 0.50, 0.55, 0,60Thermal Conductivity (W/mK)0.08, 0.09, 0.10, 0.11 Fire ProtectionF30Sound Insulation Dimension (db)≥45General Building Authority Approval Z-17.23-1287, Z-17.23-1288
All primary data were collected by KLB Klimaleichtblock GmbH for the reference year of 2023.
For the data, which the manufacturer does not influence, generic data was used. Secondary data were sourced from the regularly updated Ecoinvent database (version 3.6), aligning with EN 15804 standards to ensure background data not exceeding 10 years.
ReTHiNK EPD web application was used to model the life cycle for the production and disposal of the declared product systems. To ensure that the results are comparable, consistent background data from the international database Ecoinvent was used in the LCA (e.g., data records on energy, transport, auxiliary materials, and supplies). Almost all consistent data sets contained in the Ecoinvent database are documented and can be viewed online.
The scenarios included are currently in use and are representative for one of the most likely scenario alternatives.
According to the criteria of the "UN Environmental Global Guidance on LCA database development" mentioned in EN 15804+A2, the data quality for all three representativeness categories (geographical, technical and time) can be described as good.
A payload factor of 50 percent was used for all truck transports, which in fact corresponds to a full delivery and empty return trip. A data set for a non-specific truck was used.
The demolition process for end-of-life products is assumed to be based on data from the National Milieudatabase (NMD) in the Netherlands. According to the NMD, a hydraulic excavator is capable of breaking 9.8 tons of concrete per hour and moving 8.3 tons of concrete per hour.
The waste scenario for this LCA was determined based on NMD ID 9, which relates to concrete (i.a. elements, brickwork, reinforced concrete). According to this standard, the waste treatment process comprises 99% recycling and 1 % landfill. |
