Pore structure damage in blended cements caused by mercury intrusion

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Journal titleJournal of the American Ceramic Society
Pages3033; # of pages: 4
Subjecthydrated cement; particle size distribution; mercury ( metal); distillation; porosity; permeability; hydrated blast furnace slag; fly-ash cement blends; hydrated portland cement; hg intrusion; Concrete; ciment hydrate; granularite; mercure (metal); distillation; porosite; permeabilite
AbstractHydrated blast furnace slag and fly-ash cement blends have been shown to be very impermeable. Porosity measurements of these materials by methanol and helium pycnometry have been less than the values obtained by Hg intrusion to 410 MPa. Results of the three techniques for hydrated portland cement were the same. A technique was used in which mercury could be removed by distillation after Hg intrusion, and intrusion was then repeated. This was performed on several cements and cement blends. Pore-size distribution for the hydrated cement changed marginally but both blended materials changed markedly, displaying a coarser pore distribution. It was concluded that the latter bodies are composed of relatively large, but discontinuous pores, into which Hg enters by breaking through the pore structure.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number23258
NPARC number20375289
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Record identifier3f2f941f-089c-4bf1-ba03-dbc68cccaf7b
Record created2012-07-23
Record modified2016-05-09
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