BGzEro – backfilling measures with low CO<sub>2</sub> footprint
Abstract 2) footprint. In order to use this rock debris, this material will be stored in underground excavations and large voids. In order to backfill the underground cavities in accordance with the requirements, the debris will be crushed in an underground crushing plant prior to backfilling. However, numerous cavities in the three mines mentioned above can only be backfilled with flowable, self-levelling and self-hardening materials. Generally, cement-based backfill materials and magnesia binders can be distinguished. The CO2 footprint of mixtures with cement increases primarily with the proportion of Portland cement clinker. For this purpose, recipes containing high proportions of supplementary cementitious materials such as pozzolan and latent hydraulic additives have been developed. Magnesia binders contain the binders magnesium oxide and/or magnesium hydroxide. Depending on the raw materials and the manufacturing process, different amounts of greenhouse gases are generated during their production. The classic approach is to use magnesium oxide, which is obtained by calcining magnesite (MgCO3). However, a lot of energy is required for this process, and the carbon dioxide content of the magnesite is released. 2 footprint. Thus, raw materials and supply chains have been evaluated and are improved with regard to their environmental performance, taking into account all aspects of transport and logistics. The current focus of work is on the development of magnesia binders with natural brucite (magnesium hydroxide). Another positive aspect is the reduction of heat development of the backfill material during hardening. Furthermore, the reliability of supply for the implementation of the backfilling measures can be increased by a market analysis. The examples show that BGE and BGE TECHNOLOGY GmbH are on the right track to protect humans and the environment through the safe disposal of radionuclides and the realisation of sustainable, future-oriented technologies.
- Standort
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Deutsche Nationalbibliothek Frankfurt am Main
- Umfang
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Online-Ressource
- Sprache
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Englisch
- Erschienen in
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BGzEro – backfilling measures with low CO2 footprint ; volume:2 ; year:2023 ; pages:171-171 ; extent:1
Safety of nuclear waste disposal ; 2 (2023), 171-171 (gesamt 1)
- Urheber
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Engelhardt, Hans-Joachim
Fischer, Tilman
Räuschel, Hannes
Klingner, Frank
- DOI
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10.5194/sand-2-171-2023
- URN
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urn:nbn:de:101:1-2023090704230272077858
- Rechteinformation
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Letzte Aktualisierung
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14.08.2025, 10:55 MESZ
Datenpartner
Deutsche Nationalbibliothek. Bei Fragen zum Objekt wenden Sie sich bitte an den Datenpartner.
Beteiligte
- Engelhardt, Hans-Joachim
- Fischer, Tilman
- Räuschel, Hannes
- Klingner, Frank
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