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Hydrothermal solidification of siliceous and calcareous wastes into building materials: A generic mix design framework
- Source :
- Developments in the Built Environment, Vol 19, Iss , Pp 100534- (2024)
- Publication Year :
- 2024
- Publisher :
- Elsevier, 2024.
-
Abstract
- The presence of inactive components in siliceous and calcareous wastes tends to cause a misunderstanding in their mix design for hydrothermal solidification. The contents of typical reactive elements (i.e. Caact, Siact and Alact) in raw materials are quickly determined by simulating hydrothermal conditions. A generic mix design framework is proposed, which utilizes the molar ratio of Caact/Siact as the controlling parameter. The framework was demonstrated through a series of studies, which involved the production of granular materials using a mixture of clayey soil with slaked lime, as well as the production of compacted cylinders using a mixture of clayey soil with either slaked lime or calcium carbide slag. Experimental results showed that the hydrothermal samples achieved their maximum strength when the molar ratio of Caact/Siact in raw materials approached the theoretical Ca/Si molar ratio (i.e. 0.83) in tobermorite, provided that the molar ratio of Alact/(Alact + Siact) remained below 21%.
Details
- Language :
- English
- ISSN :
- 26661659
- Volume :
- 19
- Issue :
- 100534-
- Database :
- Directory of Open Access Journals
- Journal :
- Developments in the Built Environment
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.43bc6d78a251405cab68885aaf83f37c
- Document Type :
- article
- Full Text :
- https://doi.org/10.1016/j.dibe.2024.100534