Article (Scientific journals)
Life cycle assessment to evaluate the environmental performance of new construction material from stainless steel slag
Di Maria, Andrea; Salman, Muhammad; Dubois, Maarten et al.
2018In International Journal of Life Cycle Assessment, 23 (11), p. 2091 - 2109
Peer Reviewed verified by ORBi
 

Files


Full Text
DiMaria2018_Article_LifeCycleAssessmentToEvaluateT.pdf
Author postprint (4.02 MB)
Request a copy

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
Alkali activation; Carbonation; Hazardous waste management; Industrial symbiosis; Life cycle assessment; Stainless steel slag; Sustainable building materials; Environmental Science (all); General Environmental Science
Abstract :
[en] Purpose: Many new opportunities are explored to lower the CO2 emissions of the cement industry. Academic and industrial researches are currently focused on the possibility of recycling steel production residues in the cement industry, in order to produce new “low-carbon” binders for construction materials. The purpose of this paper is to assess the environmental benefits and costs of steel residue valorisation processes to produce a new binder for construction materials. Methods: Among other stainless steel slags (SSS), argon oxygen decarburisation (AOD)-slag has the potential to be recovered as a binder during the production of new construction materials. Alkali activation and carbonation processes can, in fact, activate the binding properties of the AOD-slag. However, AOD-slag is today only recycled as low-quality aggregate. For the present study, three different types of construction blocks (called SSS-blocks) were developed starting from the AOD-slag (one block through alkali activation and two blocks through carbonation). The data from the production of the three construction blocks have been collected and used to perform a life cycle assessment (LCA) study, comparing SSS-block production with the production of traditional paver ordinary Portland cement (OPC) concrete. Results and discussion: The analysis showed that SSS-block production through alkali activation and carbonation has the potential of lowering some of the environmental impacts of OPC-concrete. The LCA results also show that the main bottleneck in the alkali activation process is the production of the alkali activators required in the process, while the use of electricity and of pure CO2 streams in carbonation lowers the environmental performances of the entire process. Conclusions: The valorisation of AOD-slag to produce new construction materials is a promising route to lower the environmental impacts of cement and concrete industries. This product-level analysis stresses the need of updating the LCI datasets for alkali activators and boric oxide and of widening the scope of the environmental analysis up to system level, including potential economic interactions and market exchanges between steel and construction sectors.
Disciplines :
Materials science & engineering
Author, co-author :
Di Maria, Andrea  ;  Université de Liège - ULiège > TERRA Research Centre > Biosystems Dynamics and Exchanges (BIODYNE) ; Department of Materials Engineering, KU Leuven, Leuven, Belgium
Salman, Muhammad;  Indian Institute of Technology Bombay, Mumbay, India
Dubois, Maarten;  Cleantech & Sustainability Services, EY, Brussels, Belgium
Van Acker, Karel;  Department of Materials Engineering, KU Leuven, Leuven, Belgium
Language :
English
Title :
Life cycle assessment to evaluate the environmental performance of new construction material from stainless steel slag
Publication date :
November 2018
Journal title :
International Journal of Life Cycle Assessment
ISSN :
0948-3349
eISSN :
1614-7502
Publisher :
Springer Verlag
Volume :
23
Issue :
11
Pages :
2091 - 2109
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 28 December 2022

Statistics


Number of views
37 (3 by ULiège)
Number of downloads
3 (2 by ULiège)

Scopus citations®
 
44
Scopus citations®
without self-citations
40
OpenCitations
 
28
OpenAlex citations
 
49

Bibliography


Similar publications



Contact ORBi