Porosity and pore-size distribution in ordinary portland cement paste

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ConferenceProceedings of the 7th International Congress on the Chemistry of Cement: 1980, Paris, France
Subjectporosity; portland cement; hydrated cement; particle size distribution; Concrete
AbstractSome of the more important techniques used to measure porosity and pore-size distribution are discussed. The techniques used to measure porosity are the inelastic neutron-scattering method and the helium inflow and helium pycnometric technique. With the neutron scattering technique, the free and bound water can be distinguished. Helium inflow shows the collapse of layered structure when the bound water is eliminated, making it possible to separate the space between the interlayer space. Nitrogen adsorption, capillary condensation and mercury porosimetry provide both the total value of pore volume, which corresponds to the value obtained using helium pycnometry, and pore-size distribution, which correlates in all cases. With capillary condensation, however, some authors have obtained steeper curves and a much higher pore volume under 100 degrees A.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC number19445
NPARC number20375736
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Record identifier3ac93bd4-3bb8-4e07-9875-340353d2744e
Record created2012-07-23
Record modified2016-05-09
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