Free and combined chloride in hydrating cement and cement components

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TypeArticle
Journal titleMateriaux et constructions. Materials and Structures
ISSN0025-5432
Volume17
Issue100
Pages28589; # of pages: 197
Subjecthydrated cement; chloride; corrosion tests; portland cement; low c3a cement; tricalcium silicate; c3a - gypsum mixtures; calcium chloride (cacl2); Concrete; ciment hydrate; chloride; essai de corrosion
AbstractNormal portland cement, low C[3]A cement, tricalcium silicate, and C[3]A-gypsum mixtures are hydrated in the presence of 0,0.8,1.5 and 3.0% CaC1[2] for 1,3,7,14 and 28 days and the amounts of extractable chloride determined by applying a pressure of 80000 lb (449 MPa) or by treating the pastes with excess water. At early periods of hydration both methods yielded similar values for immobilized chloride. The amount of free chloride in the pore solution increased as the dosage of initially added chloride was increased. The C[3]A-gypsum mixture immobilized much higher amounts of chloride than did the C[3]S phase. Normal portland cement had lower amounts of free chloride than low C[3]A cement.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
IdentifierDBR-P-1245
NRC number23871
3047
NPARC number20375755
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Record identifier41de6682-d3bc-489f-8e63-63414e6f9cd1
Record created2012-07-23
Record modified2016-05-09
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