A broad line NMR and MRI study of water and water transport in Portland cement pastes.
The results of a magnetic resonance spin-spin relaxation analysis and broad-line magnetic resonance imaging (MRI) (gradient-echo and stray-field imaging) study of water and water transport in Portland cement pastes are presented. The effect of varying the cure conditions and the water to cement (w/c) ratio of the sample of mix are discussed. The water sorptivity and the concentration dependence of the hydraulic diffusion coefficient are calculated for samples prepared with a 0.5 w/c ratio and, therefore, an open pore structure. In the case of 0.3 w/c ratio samples, little water transport is observed, and a closed pore structure is inferred.
Bohris
A J
AJ
School of Physical Sciences, University of Surrey, Guildford, UK.
Goerke
U
U
McDonald
P J
PJ
Mulheron
M
M
Newling
B
B
Le Page
B
B
D002484:Cementation; D003252:Construction Materials; D004058:Diffusion; D006801:Humans; D008279:Magnetic Resonance Imaging; D009682:Magnetic Resonance Spectroscopy; D009824:Ointments; D016062:Porosity; D012212:Rheology; D014867:Water
D009824:Ointments; D014867:Water