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<p>The goal of the research work is to manufacture a high performance geopolymer eco-binder, containing high amount of pure molecule (Si<sub>2</sub>AlKO<sub>6</sub>), from a very complex mixture of collected brick wastes using a strong KOH alkaline solution. The effect of the alkaline solution molarity and cure temperature on the geopolymerization process and the paste performance was studied. The study of the microstructure and texture of the geopolymer was carried out using many characterization techniques (FRX, XRD, FTIR, TG-DTA, SEM, EDX), highlighting the formation of the pure molecule mixed with amorphous and crystalline calcium aluminislicate phases. The correlation between them and the compressive strength was also studied. The results showed that the geopolymer formation depends on cure temperature and alkaline solution molarity, of which 60&#xa0;°C and 8&#xa0;M were the optimum parameters leading to obtain a high performance geopolymer rich in pure molecule. This was proved by the compressive strength, recording the high value (54&#xa0;MPa) at 28 days of hardening. The synthesized geopolymer is a real alternative to ordinary Portland cement.</p>

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Synthesis of high performance macromolecule geopolymer from complex brick waste mixture: correlation between microstructure, texture and mechanical behavior

  • 期刊论文

  • 发表日期：

    2025年12月5日

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  • Hamza Benbouziane,
  • Meriem Merabtene,
  • Larbi Kacimi,
  • Annelise Cousture,
  • Abdelhak Kaci

摘要

The goal of the research work is to manufacture a high performance geopolymer eco-binder, containing high amount of pure molecule (Si2AlKO6), from a very complex mixture of collected brick wastes using a strong KOH alkaline solution. The effect of the alkaline solution molarity and cure temperature on the geopolymerization process and the paste performance was studied. The study of the microstructure and texture of the geopolymer was carried out using many characterization techniques (FRX, XRD, FTIR, TG-DTA, SEM, EDX), highlighting the formation of the pure molecule mixed with amorphous and crystalline calcium aluminislicate phases. The correlation between them and the compressive strength was also studied. The results showed that the geopolymer formation depends on cure temperature and alkaline solution molarity, of which 60 °C and 8 M were the optimum parameters leading to obtain a high performance geopolymer rich in pure molecule. This was proved by the compressive strength, recording the high value (54 MPa) at 28 days of hardening. The synthesized geopolymer is a real alternative to ordinary Portland cement.