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Advanced calcareous ceramics via novel green processing and supercritical carbonation
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Farahi, E., Purnell, Phil and Short, N. R. (2007) Advanced calcareous ceramics via novel green processing and supercritical carbonation. In: International Conference on Sustainable Construction Materials and Technologies, Coventry University, Coventry, England, 11-13 Jun 2007. Published in: Sustainable Construction Materials and Technologies pp. 359-366. ISBN 9780415446891.
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Abstract
This project is aimed at investigating the potential for using a supercritical carbonation process in combination with other novel processing techniques to fabricate a new class of ceramic composites from a variety of calcium-based precursor materials, including lime and cement. The process has the potential to help mitigate the CO2 impact of the manufacture of cements by re-combining some of the CO2 emitted. Compression moulding techniques as used for mass-produced polymer components, are used to fabricate green forms, which are then treated with supercritical CO2. Considerable development of the moulding process and mix design was required to produce viable green forms. The effect of the treatment on the microstructure and engineering properties of specimens was investigated using XRD and 4-point bending tests. XRD tests confirmed that complete depletion of calcium hydroxide and anhydrous species was achieved during the carbonation process in most samples, with consequent formation of calcite. Mechanical testing indicated that considerable improvement in flexural strength could be achieved by carbonation, well over and above that which would be expected during conventional water curing. Results also indicated that 'full carbonation' as indicated by calcium hydroxide depletion is not a reliable indicator for achieving high strength; the mix design plays a critically important role.
| Item Type: | Conference Item (Paper) | ||||
|---|---|---|---|---|---|
| Subjects: | T Technology > TH Building construction T Technology > TA Engineering (General). Civil engineering (General) |
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| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||
| Series Name: | Proceedings and Monographs in Engineering, Water and Earth Sciences | ||||
| Journal or Publication Title: | Sustainable Construction Materials and Technologies | ||||
| ISBN: | 9780415446891 | ||||
| Editor: | Chun, Y. M. and Clsisse, P. and Naik, T. R. and Ganjian, E. | ||||
| Official Date: | 2007 | ||||
| Dates: |
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| Number of Pages: | 8 | ||||
| Page Range: | pp. 359-366 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Conference Paper Type: | Paper | ||||
| Title of Event: | International Conference on Sustainable Construction Materials and Technologies | ||||
| Type of Event: | Conference | ||||
| Location of Event: | Coventry University, Coventry, England | ||||
| Date(s) of Event: | 11-13 Jun 2007 | ||||
| Related URLs: |
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