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Hauer B.,Forschungsinstitut der Zement industrie
Betonwerk und Fertigteil-Technik/Concrete Plant and Precast Technology | Year: 2010

A building material profile was established for an average cement in Germany, which enables the preparation of a more comprehensive profile of the concrete and the structural components made thereof. Average values for Germany were also applied to the other input parameters used for the environmental impact assessment. The mean carbon emission levels generated per ton of clinker at the cement plant were considered, as well as mean transport distances for the raw materials for cement production. In the final step, the building material profile for 1 ton of reinforcing steel was calculated for the year of 2007 in coordination with the Institut für Stahlbetonbewehrung e.V., using the data of a reinforcing steel plant representative of the production in Germany. Information from the GaBi4 database was used to develop environmental profiles for upstream processes. This approach enables a consistent calculation of environmental impact profiles and thus prevents the creation of artificial differences between the data used. Source


Hauer B.,Forschungsinstitut der Zement industrie | Rubner K.,BAM Federal Institute of Materials Research and Testing | Herbst T.,BAM Federal Institute of Materials Research and Testing | Schafer S.,Forschungsinstitut der Zement industrie | Seidel M.,Forschungsinstitut der Zement industrie
Betonwerk und Fertigteil-Technik/Concrete Plant and Precast Technology | Year: 2010

The use of secondary materials in concrete construction provides the opportunity to reduce the environmental impact created by the raw materials used for concrete production whilst enabling a sensible utilization of these materials. In a sub-project 'Potentials for the use of secondary materials in concrete construction', a method to assess the use of secondary materials was developed that integrates the consideration of sustainability aspects. In the first step, the basic technical and legal requirements, including their environmental compatibility, must be reviewed in order to define the framework for their sensible use. Following the verification of the assessment method for secondary materials already in use, several new ways of utilizing secondary materials in the production of cement and concrete have been investigated. As a new type of material re-use in concrete production, the use of bottom ashes from municipal solid waste incinerators (MSWI) as secondary aggregates was investigated. Due to their chemical-mineralogical composition, these ashes can generally be used as concrete aggregates. Source

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