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@PHDTHESIS{Drger:974079,
author = {Dräger, Philipp Benjamin},
othercontributors = {Letmathe, Peter and Lorz, Jens Oliver},
title = {{T}owards a circular construction industry: an empirical
analysis how construction companies transform their
businesses with new products, processes, and business
models},
school = {Rheinisch-Westfälische Technische Hochschule Aachen},
type = {Dissertation},
address = {Aachen},
publisher = {RWTH Aachen University},
reportid = {RWTH-2023-11202},
pages = {1 Online-Ressource : Illustrationen},
year = {2023},
note = {Veröffentlicht auf dem Publikationsserver der RWTH Aachen
University; Dissertation, Rheinisch-Westfälische Technische
Hochschule Aachen, 2023},
abstract = {Circular Economy is nowadays one of the most trending
interdisciplinary research topics in the fields of
ecological sustainability, economics, and management
science. While a linear economy, our still commonly used
economic system, works with processes like ‘take’,
‘make’, ‘use’, ‘dispose’, a Circular Economy
aims at keeping products and its resources in a cycle and
thus include process steps such as ‘make’, ‘use’,
‘reuse’, ‘remanufacture’, and ‘recycle’. One of
the industries, where a transition to a Circular Economy
could potentially make one of the biggest impacts, is the
construction industry with its vast amounts of primary
resources used and its big impact on the environment. This
dissertation contains of two parts: The first one gives a
comprehensive overview and introduction of the relevant
research motivation, and on the interplay of the four
research papers. While the focus on this dissertation lies
on how construction companies can transform their businesses
towards a Circular Economy with new products, processes, and
business models, it is first explained how these affect
different organizational levels. Additionally, the
theoretical foundation as well as the methodological
approach is explained in this section. In the second part,
the four stand-alone research articles analyze through
empirical research methods their specific underlying
research questions in detail. The first research paper
answers the question of the willingness to produce recycled
concrete of construction companies and identifies economic
and geographical determinants of it. Therefore, a telephone
survey was used and combined with regional data. The results
show that the market concentration, firm size, partially
vertical integration, and economic activity of the region
have a significant impact on the willingness to produce
recycled concrete. The second research paper examines
further the drivers of circular business models and how
these models can be operationalized within production
processes. In this regard, the role of employees is further
examined and how they can influence the set-up times as well
as the process quality in construction companies. In this
article, an only survey was compiled and analyzed with a
structural equation model. Results show that employees do
have a significant impact on reducing set-times as well as
improving the process quality in construction companies.
Furthermore, these improvements also lead to a higher
Circular Economy efficiency, which means that a higher share
of secondary input materials can be used, but also a
proactive waste reduction during the production is applied.
Research paper 3 deep dives into a case study of a single
construction company and examines in detail potential value
losses and its environmental impact in the production.
Therefore, Cost Efficiency Accounting was applied in the
construction company for the production of 460 products. The
study shows that complex products cause more value losses in
production as well have a higher environmental impact
instead of non-complex ones. Lastly the article shows, that
a material substitution from conventional steel
reinforcement to fiber-based reinforcement could benefit in
a reduction of the GHG-emissions while not affecting the
cost structure of these products. The last research paper
answers the question whether construction companies in
Germany already have circular products on the market.
Therefore, an adapted version of the Material Circularity
Indicator was applied to construction products in the
database of Ökobaudat. This examination reveals that
products with a high circularity score are still an
exception, and the majority of the products even have the
lowest score. In summary, the present dissertation gives a
deeper insight and understanding of the different levers,
drivers and barriers for the transition from a linear to a
circular construction industry with a focus on circular
business models and efficiency improvements.},
cin = {812110},
ddc = {330},
cid = {$I:(DE-82)812110_20140620$},
pnm = {Forschungskolleg Verbund.NRW},
pid = {G:(NRW)080053},
typ = {PUB:(DE-HGF)11},
doi = {10.18154/RWTH-2023-11202},
url = {https://publications.rwth-aachen.de/record/974079},
}
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