Muhammad Usama Salim , Aamar Danish , Anthony S. Torres , Carlos Moro
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引用次数: 0
Abstract
This study investigates the viability of utilizing cenospheres as an alternative precursor material for geopolymer formulation, comparing their performance against ground-granulated blast furnace slag (GGBFS) across various parameters such as strength, durability, cost, and environmental impacts. A cradle-to-gate life cycle assessment was performed to evaluate the environmental impact of geopolymer mixtures containing varying proportions of cenosphere and GGBFS, relative to conventional cement mortar (CM). Additionally, a multi-criteria decision-making (MCDM) analysis was employed by assigning varied importance levels to identify the optimal formulation derived from performance (strength and durability), cost, and environmental impact. The findings demonstrate that GGBFS/cenosphere-based geopolymers lower global warming potential (GWP) by 24–33 % compared to CM. Moreover, incorporating 25–75 % cenospheres in geopolymers reduces GWP by 4–7 % and energy consumption by 5 % compared to purely GGBFS-based geopolymers. The eutrophication potential (EP) and acidification potential (AP) were also reduced by 3–10 % and 5–15 %, respectively, by adding 25–75 % cenospheres in geopolymers. However, the cost is also increased by 6–18 %. Based on the MCDM analysis, geopolymers containing cenosphere possess higher overall sustainability than conventional cement-based mortars.
期刊介绍:
Environmental Impact Assessment Review is an interdisciplinary journal that serves a global audience of practitioners, policymakers, and academics involved in assessing the environmental impact of policies, projects, processes, and products. The journal focuses on innovative theory and practice in environmental impact assessment (EIA). Papers are expected to present innovative ideas, be topical, and coherent. The journal emphasizes concepts, methods, techniques, approaches, and systems related to EIA theory and practice.