Toward Sustainable Mining: Repurposing Benguerir’s Phosphate Mine Waste Rock for Road Subgrade Construction
Natural aggregates are widely consumed worldwide by the road construction industry. Particularly in the phosphate sector, reducing industrial waste and conserving non-renewable natural resources can be achieved by utilizing unusual industrial wastes and by-products in road construction procedures. R...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2025-01-01
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| Series: | E3S Web of Conferences |
| Online Access: | https://www.e3s-conferences.org/articles/e3sconf/pdf/2025/01/e3sconf_icegc2024_00055.pdf |
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| Summary: | Natural aggregates are widely consumed worldwide by the road construction industry. Particularly in the phosphate sector, reducing industrial waste and conserving non-renewable natural resources can be achieved by utilizing unusual industrial wastes and by-products in road construction procedures. Road construction may find use for Phosphate Mine Waste Rocks (PMWR) as an alternate secondary raw material source. However, there are currently limitations on the use and valuation of these materials due to the Moroccan Guide for Road Earthworks (GMTR), which classifies them as waste products and so unsuitable for use in road building. Phosphate waste rocks are naturally existing sedimentary rocks that have mainly been mechanically fragmented, despite their designation. The purpose of this study is to assess PMWR’s essential characteristics for application in road construction. At the Moroccan phosphate mine location of Benguerir, samples have been collected from screening stockpiles. Then, using international testing standards, environmental and health behaviours, chemical, mineralogical, physical, and geotechnical behaviours, these samples were analysed. The materials’ suitability for use in subgrade layer was validated by laboratory and field experiments, hence allowing for their reclassification as conventional materials. |
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| ISSN: | 2267-1242 |