A Neutron Scattering Investigation of the Crystalline Structure of
Ettringite with In Situ Observation of Its Formation and Thermal
Decomposition
Mike Hartman, NCNR
Ettringite,
Ca6[Al(OH)6]2(SO4)3.26H2O,
is an important hydration product during the initial hydration stages of
Portland cement, and it has also been linked to degradation mechanisms in
mature cement pastes. The structure of Ettringite, as determined by a
recent neutron scattering investigation, will be presented. In situ
measurements of the evolution of the Ettringite crystalline structure
during formation and thermal decomposition will be discussed in relation
to prior measurements of these processes.
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