Gypsum: an investigation of microstructure and mechanical properties

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This article addresses the microstructure and mechanical properties of a ß-hemihydrate produced gypsum from a combined study of hydration and dehydration. A thin layer of adsorbed water molecules around the particles is necessary to assure the fluidity of the hydrating system and the thickness of this water layer is derived using the spread-flow test. The shape factor of the investigated hemihydrate is derived from the spread-flow test. The mechanical property of the generated gypsum is investigated and the influence of water content is discussed. The dehydration of gypsum is studied by both thermo gravimetric analysis and heating the samples in a ventilated oven. A model is proposed to describe the microstructure change beyond dehydration and experimental results show its validity. The mechanical property of the gypsum beyond dehydration is presented as well.
Originele taal-2Engels
TitelProceedings 8th fib International PhD Symposium in Civil Engineering, Lyngby (Denmark), June 2010
RedacteurenG Fischer, M Geiker, O Hededa, L Ottoson, H Stang
Plaats van productieDenmark
UitgeverijTechnical University of Denmark
Pagina's341-346
ISBN van geprinte versie9788778773012
StatusGepubliceerd - 2010
Evenement8th fib International PhD Symposium in Civil Engineering - Copenhagen, Denemarken
Duur: 20 jun. 201023 jun. 2010

Congres

Congres8th fib International PhD Symposium in Civil Engineering
Land/RegioDenemarken
StadCopenhagen
Periode20/06/1023/06/10
Ander8th fib International PhD Symposium in Civil Engineering

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