| Title | Manufacture and Characterization of Fired Bricks from Gold Mine Waste Rocks |
|---|---|
| ID_Doc | 10421 |
| Authors | Benahsina, A; Taha, Y; Bouachera, R; Elomari, M; Bennouna, MA |
| Title | Manufacture and Characterization of Fired Bricks from Gold Mine Waste Rocks |
| Year | 2021 |
| Published | Minerals, 11, 7 |
| Abstract | The purpose of this research was to evaluate the possibility of using gold mine waste rocks (GMWRs) as alternative raw material for the manufacturing of fired bricks. The feasibility study was assessed through (i) physical, chemical, mineralogical and environmental characteristics of GMWRs; (ii) determination of the natural clay (NC) substitution effect when using GMWRs; (iii) the effect of the firing temperature on the mechanical and physical properties of the fired bricks. Five mixtures of NC and GMWRs were studied. The percentages of substitution of NC with GMWRs varied from 0 to 100%. The brick specimens were fired at 900 degrees C, 1000 degrees C and 1050 degrees C. The results show that increasing the firing temperature improved the flexural strength and density of the bricks, while the substitution of NC with GMWRs caused a reduction in the mechanical resistance of the bricks and an increase in their porosity and, consequently, their water absorption rate. However, the properties of bricks that contained up to 80 wt% of GMWRs and fired at 1000 degrees C and 1050 degrees C satisfied the requirements set by the applicable civil engineering and environmental standards. This was found to be an efficient and sustainable solution to mitigate environmental hazards and better manage mining wastes, concurrently producing marketable products from them, which is in accordance with the circular economy concept. |
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