Manufacture and Characterization of Fired Bricks from Gold Mine Waste Rocks
| Autor: | Azzeddine Benahsina, Rachida Bouachera, Mohamed Elomari, Mohammed Abdouh Bennouna, Yassine Taha |
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| Rok vydání: | 2021 |
| Předmět: |
Brick
Absorption of water Materials science fired bricks Metallurgy 0211 other engineering and technologies Geology 02 engineering and technology mechanical properties 010501 environmental sciences Mechanical resistance Raw material Mineralogy Geotechnical Engineering and Engineering Geology 01 natural sciences Characterization (materials science) Flexural strength 021105 building & construction clays valorization mining waste rocks Porosity environment QE351-399.2 0105 earth and related environmental sciences |
| Zdroj: | Minerals, Vol 11, Iss 695, p 695 (2021) Minerals Volume 11 Issue 7 |
| ISSN: | 2075-163X |
| DOI: | 10.3390/min11070695 |
| Popis: | 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 °C, 1000 °C and 1050 °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 °C and 1050 °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. |
| Databáze: | OpenAIRE |
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