Pore structure formation during hydration of fly-ash and slag cement blends

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ConferenceEffects of Flyash Incorporation in Cement and Concrete : Proceedings of Symposium N, Materials Research Society Annual Meeting: 16 November 1981, Boston, MA, USA
Pages124133; # of pages: 10
Subjectportland cement; mechanical properties; porosity; hydration; temperature; calcium hydroxide caoh2 content; porosity; pore size distribution; compressive strength; young's modulus; microhardness; temperature acceleration period; Concrete
AbstractThree mixes, a reference cement, one fly-ash blend containing 35% fly-ash, and one with 70% slag, were cured in water at 21, 35 and 55 degrees C at a w/c = 0.45. After 2, 7, 14, 28, 90, 180, 365, and 550 days Ca(OH)[2] content, porosity, pore size distribution, compressive strength, Young's modulus and microhardness of the products were determined. The logarithms of these mechanical properties were plotted against porosity. Higher temperature increased the rate of reaction of the reference cement for up to two days, then retarded it. This acceleration period was considerably extended for the cement blends. Mechanical properties at zero porosity were generally improved in blends hydrated at room temperature; and all blends had a finer pore and lower Ca(OH)[2] content than the cement specimen.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number20777
NPARC number20375775
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Record identifierc8c9e6df-44d5-4ce3-9949-3f83338fdfb2
Record created2012-07-23
Record modified2016-05-09
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