1 resultado para replacement of RGPs
em Research Open Access Repository of the University of East London.
Filtro por publicador
- AMS Tesi di Dottorato - Alm@DL - Università di Bologna (5)
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- BORIS: Bern Open Repository and Information System - Berna - Suiça (47)
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- Chinese Academy of Sciences Institutional Repositories Grid Portal (30)
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- Comissão Econômica para a América Latina e o Caribe (CEPAL) (7)
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- Corvinus Research Archive - The institutional repository for the Corvinus University of Budapest (1)
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- Savoirs UdeS : plateforme de diffusion de la production intellectuelle de l’Université de Sherbrooke - Canada (3)
- Universidad de Alicante (2)
- Universidad del Rosario, Colombia (6)
- Universidad Politécnica de Madrid (8)
- Universidade de Lisboa - Repositório Aberto (1)
- Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP) (1)
- Universidade Federal do Pará (2)
- Universidade Federal do Rio Grande do Norte (UFRN) (24)
- Universidade Técnica de Lisboa (1)
- Universitat de Girona, Spain (5)
- Universitätsbibliothek Kassel, Universität Kassel, Germany (5)
- Université de Lausanne, Switzerland (1)
- Université de Montréal, Canada (13)
- University of Connecticut - USA (2)
- University of Michigan (12)
- University of Queensland eSpace - Australia (14)
- WestminsterResearch - UK (5)
Resumo:
This study looked at the potential of bauxite residue or red mud to be used in the manufacture of lightweight aggregate in replacement of pulverised fuel ash (PFA), commonly used as a way of recycling problematic wastes. The percentage replacements of red mud with PFA were as follows: 25, 31, 38, 44 and 50%. These were blended in a mix with waste excavated clay and sewage sludge – all from the Chongqing municipality in China. Lightweight pellets were produced using a Trefoil rotary kiln and were sintered to 1200 °C. Results showed that 44 % bauxite residue replacement produced lightweight pellets with the highest compressive strength, highest density and largest water holding capacity. This would be expected in materials with a low level of silicates, which causes insufficient glass phase viscosity and therefore poor bloating during firing; producing an aggregate with a higher density but with open pores that allowed for larger water absorption. All ratios of red mud aggregates were significantly reduced in pH after firing to around pH 8, and this reduced the leachability of the aggregates to levels below those set by the European landfill directive (2003/33/EC).