Sustainability Potential Evaluation of Concrete with Steel Slag Aggregates by the LCA Method

Vojtěch Václavík, Marcela Ondová, Tomáš Dvorský, Adriana Eštoková, Martina Fabiánová and Lukáš Gola
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Vojtěch Václavík: Department of Environmental Engineering, Faculty of Mining and Geology, VSB—Technical University of Ostrava, 708 00 Ostrava, Czech Republic
Marcela Ondová: Institute of Environmental Engineering, Faculty of Civil Engineering, Technical University of Kosice, 042 00 Kosice, Slovakia
Tomáš Dvorský: Department of Environmental Engineering, Faculty of Mining and Geology, VSB—Technical University of Ostrava, 708 00 Ostrava, Czech Republic
Adriana Eštoková: Institute of Environmental Engineering, Faculty of Civil Engineering, Technical University of Kosice, 042 00 Kosice, Slovakia
Martina Fabiánová: Institute of Environmental Engineering, Faculty of Civil Engineering, Technical University of Kosice, 042 00 Kosice, Slovakia
Lukáš Gola: Department of Environmental Engineering, Faculty of Mining and Geology, VSB—Technical University of Ostrava, 708 00 Ostrava, Czech Republic

Sustainability, 2020, vol. 12, issue 23, 1-20

Abstract: Sustainability in the construction industry refers to all resource-efficient and environmentally responsible processes throughout the life cycle of a structure. Green buildings may incorporate reused, recycled, or recovered materials in their construction. Concrete is as an important building material. Due to the implementation of by-products and waste from various industries into its structure, concrete represents a significant sustainable material. Steel slag has great potential for its reuse in concrete production. Despite its volume changes over time, steel slag can be applied in concrete as a cement replacement (normally) or as a substitute for natural aggregates (rarely). This paper focused on an investigation of concrete with steel slag as a substitute of natural gravel aggregate. Testing physical and mechanical properties of nontraditional concrete with steel slag as a substitute for natural aggregates of 4/8 mm and 8/16 mm fractions confirmed the possibility of using slag as a partial replacement of natural aggregate. Several samples of concrete with steel slag achieved even better mechanical parameters (e.g., compressive strength, frost resistance) than samples with natural aggregate. Moreover, a life cycle assessment (LCA) was performed within the system boundaries cradle-to-gate. The LCA results showed that replacements of natural aggregates significantly affected the utilization rate of nonrenewable raw materials and reduced the overall negative impacts of concrete on the environment up to 7%. The sustainability indicators (SUI), which considered the LCA data together with the technical parameters of concrete, were set to evaluate sustainability of the analyzed concretes. Based on the SUI results, replacing only one fraction of natural gravel aggregate in concrete was a more sustainable solution than replacing both fractions at once. These results confirmed the benefits of using waste to produce sustainable materials in construction industry.

Keywords: steel slag; natural aggregates; sustainability (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:12:y:2020:i:23:p:9873-:d:451192

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