Degradation and Material Transport for Thin Plates of Cement Pastes

1988 ◽  
Vol 127 ◽  
Author(s):  
Karen Nilsson ◽  
K. Brodersen
Keyword(s):  
Neutron Scattering ◽  
Small Angle ◽  
Preliminary Data ◽  
Small Angle Neutron Scattering ◽  
Pozzolanic Reaction ◽  
Thin Plates ◽  
Crack Healing ◽  
Laboratory Studies ◽  
Material Transport ◽  
Cement Pastes

ABSTRACTA ‘thin-plate’ technique, which is well suited for laboratory studies on cements, has been used in equilibrium experiments aimed at studying material transport between concretes of different composition. The extent of material transport is small, but there appear to be a movement of calcium towards thin plates containing excess silica fume, where supposedly the pozzolanic reaction takes place, an aspect which can be of interest for crack-healing of cements. A model concerned with crack healing of cement is discussed. Preliminary data have been obtained in a study where thin plates have been employed to investigate the effect of leaching on the microstructure of cements using the technique of Small Angle Neutron Scattering (SANS).

Small-Angle Neutron Scattering from Hydrated Cement Pastes

1994 ◽  
Vol 376 ◽  
Author(s):  
L.P. Aldridge ◽  
W.K. Bertram ◽  
T.M. Sabine ◽  
J Bukowski ◽  
J.F. Young ◽  
...  
Keyword(s):  
Data Analysis ◽  
Neutron Scattering ◽  
Cement Paste ◽  
Small Angle ◽  
Calcium Silicate ◽  
Small Angle Neutron Scattering ◽  
Calcium Silicate Hydrate ◽  
Hydrated Cement ◽  
Cement Pastes ◽  
Hydrated Cement Paste

ABSTRACTSmall angle neutron scattering (SANS) has been used to examine hydrated cement pastes with water-to-cement ratios between 0.25 and 0.8 and cured for 28 days. Various methods of data analysis are applied to the pastes.Fitting the entire SANS spectra of the hydrated cement paste has suggested that there are two scattering entities in the paste. There is some evidence to suggest that one scattering entity is globules of calcium silicate hydrate formed in the hydrated paste.

An investigation on the nature of porosity in hardened cement pastes using small angle neutron scattering

1983 ◽  
Vol 18 (2) ◽  
pp. 430-438 ◽  
Author(s):  
D. Pearson ◽  
A. Allen ◽  
C. G. Windsor ◽  
N. Alford ◽  
D. D. Double
Keyword(s):  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Hardened Cement ◽  
Cement Pastes ◽  
Hardened Cement Pastes

Microstructure of die-cast alloys Mg–Zn–Al(–Ca): a study by electron microscopy and small-angle neutron scattering

2003 ◽  
Vol 94 (5) ◽  
pp. 564-571 ◽  
Author(s):  
Michael Vogel ◽  
Oliver Kraft ◽  
Peter Staron ◽  
Helmut Clemens ◽  
Rainer Rauh ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Die Cast ◽  
Cast Alloys
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