Sustainable Utilization of Phosphogypsum in Multi-Solid Waste Recycled Aggregates: Environmental Impact and Economic Viability

Wengang Li, Liping Ma (), Shuyue Qiu, Xia Yin, Quxiu Dai and Wang Du
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Wengang Li: Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
Liping Ma: Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
Shuyue Qiu: Design and Research Institute Co., Ltd., Kunming University of Science and Technology, Kunming 650500, China
Xia Yin: Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
Quxiu Dai: Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
Wang Du: Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China

Sustainability, 2024, vol. 16, issue 3, 1-18

Abstract: This study contributes to sustainable construction practices by exploring the use of phosphogypsum, a commonly discarded byproduct, in the production of recycled aggregates. Addressing both environmental and economic aspects of sustainability, we investigate the feasibility of employing phosphogypsum as a primary raw material, in collaboration with various solid waste components, using pressure molding techniques. Our research evaluates the performance of these aggregates in terms of compressive strength, softening coefficient, and their potential to reduce environmental pollution. Findings indicate that aggregates containing 70% phosphogypsum can effectively meet the requirements for C25 concrete applications, underscoring the method’s sustainability through efficient waste material utilization, reduced environmental impact, and potential economic benefits compared to new resource extraction. This approach contributes to the understanding of sustainable resource utilization in construction, resonating with global sustainability goals, particularly the United Nations’ 2030 Agenda for Sustainable Development.

Keywords: phosphogypsum; recycled aggregates; sustainable development; eco-friendly construction materials; sustainable construction; waste recycling (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2024
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