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Sustainable circular value chains : From rural waste to feasible urban construction materials solutions

Title data

Schmidt, Wolfram ; Commeh, Michael ; Olonade, Kolawole ; Schiewer, Gesine Lenore ; Dodoo-Arhin, David ; Dauda, Risikat ; Fataei, Shirin ; Tawiah, Angela Tetteh ; Mohamed, Fatma ; Thiedeitz, Mareike ; Radebe, Nonkululeko W. ; Rogge, Andreas:
Sustainable circular value chains : From rural waste to feasible urban construction materials solutions.
In: Developments in the Built Environment. Vol. 6 (2021) . - No. 100047.
ISSN 2666-1659
DOI: https://doi.org/10.1016/j.dibe.2021.100047

Abstract in another language

Urban regions in sub-Saharan Africa are growing significantly more rapid than their also growing rural counterparts. However, the employment perspectives in rural areas are decreasing, and thus the urban growth can become a driver for enhanced livelihoods in the rural areas. Since urbanisation in Africa requires high amount of concrete, the conversion of agricultural waste materials to sustainable concrete constituents does not only create new rural and urban income possibilities, it can also help Africa's construction industry to spearhead green concrete technologies, and thus to reduce carbon emission worldwide.

From vegetable wastes chemical admixtures can be derived as well as reactive mineral cement substitutes, which help to use concrete more efficiently and reduce the ordinary Portland cement clinker in concrete, respectively. The authors of this paper discuss the potentials and shortcomings of using agricultural waste materials for construction materials and propose a synergistic three-step process chain to obtain polysaccharides, biochar, and a reactive ash. The process requires boiling, hydrolysis and vertical shaft kiln technology, respectively, to obtain maximum useable products with minimum generation of climate gases. Eventually, the process chain is discussed in conjunction with possible rural to urban circular economic potentials in the concrete construction business.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Sustainability; Circular economy; Urbanisation; Cement; CONCRETE; Vertical shaft kiln; Hydrolysis; Biochar; Polysaccharides; Sub-saharan africa; Africa
Institutions of the University: Faculties > Faculty of Languages and Literature > Chair Intercultural German Studies > Chair Intercultural German Studies - Univ.-Prof. Dr. Gesine Schiewer
Result of work at the UBT: Yes
DDC Subjects: 400 Language
Date Deposited: 21 Nov 2022 13:54
Last Modified: 21 Nov 2022 13:54
URI: https://eref.uni-bayreuth.de/id/eprint/72865