Moisture content - its significance and interaction in a porous body

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ConferenceProceedings of the International Symposium on Humidity and Moisture: 1963, Washington, DC, USA
Volume4,Chap. 28
Pages233243; # of pages: 11
Subjectporosity; moisture content; water absorption; isotherms
AbstractThe meaning of moisture content of a specimen is discussed in terms of the different states of interaction in which water may exist in the specimen and of the length changes arising from a change in this moisture content. Sorption isotherms and the associated length changes have been determined for a number of porous systems, including molecular sieves, porous glass, "Cab-O-Sil" silica, precipitated calcium carbonate, CaSO[4].1/2H[2]0, and hydrated cement. All these materials, except porous glass were compressed in a mold at high pressure to form compacts ( rigid porous bodies), and this technique is discussed. The significance of the sorption isotherms in determining the structure of the adsorbent is discussed, and the added complication of water of structural types (e.g., hydrate, activated adsorption) in the isotherm is emphasized. Methods for differentiating between the different types are outlined with the aid of theoretical equations applied to the results of the length change and sorption isotherms.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number8600
NPARC number20375696
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Record identifier17232fee-6973-42a0-b605-7ccfeddd03a2
Record created2012-07-23
Record modified2016-05-09
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