- AutorIn
- Kyung-Min Song
- Jonathan Mitchell
- Lynn F. Gladden
- Titel
- Observing microstructural evolution during plaster hydration
- Zitierfähige Url:
- https://nbn-resolving.org/urn:nbn:de:bsz:15-qucosa-192277
- Quellenangabe
- Diffusion fundamentals - 10
- Quellenangabe
- Diffusion fundamentals 10 (2009) 22, S. 1-3
- Erstveröffentlichung
- 2009
- Abstract (EN)
- Calcium sulphate hemihydrate (CaSO4·0.5H2O), commonly known as plaster of Paris, is used extensively in the construction, ceramics, and medical industries. There are two varieties of plaster referred to as α and β, produced by “wet” or “dry” methods respectively. Plaster hydrates to form crystalline gypsum (CaSO4·2H2O, dihydrate). We present a comparative in situ study of the microstructural changes that occur during the hydration of the two forms of plaster at a water-to-plaster ratio of w/p = 0.8 using NMR relaxometry and electron microscopy. In the α-plaster, pores evolve gradually to form a uniform, interconnected structure. In contrast, the β-plaster hydrates faster, leading to a less homogeneous product with micro-cracks resulting from rapid chemical shrinkage.
- Freie Schlagwörter (DE)
- Diffusion, Transport
- Freie Schlagwörter (EN)
- diffusion, transport
- Klassifikation (DDC)
- 530
- Herausgeber (Institution)
- University of Cambridge
- Universität Leipzig
- URN Qucosa
- urn:nbn:de:bsz:15-qucosa-192277
- Veröffentlichungsdatum Qucosa
- 17.12.2015
- Dokumenttyp
- Artikel
- Sprache des Dokumentes
- Englisch