Dimensional change and elastic behavior of hardened portland cement paste, Ca-montmorillonite and 1.4 nm tobermorite: a comparative study

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ConferenceEngineering Conference on Advances in Cement and Concrete: 10 August 2003, Copper Mountain Colorado, U.S.A.
Pages201209; # of pages: 9
Subjectdimensional change, modulus of elasticity, Portland cement paste, Ca-montmorillonite, 1.4 nm tobermorite, nanostructure, durability; Cement/Concrete
AbstractThe role of water in hardened Portland cement paste (hpc) is germane to an understanding of the nature of nanostructure ? property relationships. The irreversible dimensional changes of hpc that occur on wetting and drying are dissimilar to those observed for other silicate minerals of interest to cement science. This irreversibility is also observed for the modulus of elasticity parameter. Length change, mass change and modulus of elasticity isotherms (including 1st and 2nd drying-wetting cycles) were determined for specimens of hpc, montmorillonite and 1.4 nm tobermorite. All exhibit significant irreversible behavior. Similarities and differences in the nature and character of the three types of isotherms are discussed. Inferences are made with respect to the nanostructural nature of hpc and its dimensional response in aqueous media. It is apparent that hpc has unique characteristics that are responsible for stability.
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AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number46433
NPARC number20386391
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Record identifiercd792d23-364c-4beb-8c94-a95a980473df
Record created2012-07-25
Record modified2016-05-09
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