Free and combined chloride in hydrating cement and cement components

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Author	Search for: Ramachandran, V. S.¹; Search for: Seeley, R. C.; Search for: Polomark, G. M.¹
Affiliation	National Research Council of Canada
Format	Text, Article
Subject	Concrete; hydrated cement; Portland cement; chloride; corrosion tests; low c3a cement; tricalcium silicate; c3a - gypsum mixtures; calcium chloride (CaCl₂)
Abstract	Normal 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	1984-07
In	Materials and Structures 17, no. 100 (July 1984): 285–289.
Language	English
Peer reviewed	Yes
Identifier	DBR-P-1245
NRC number	NRCC 23871 NRC-IRC-3047
NPARC number	20375755
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Record identifier	41de6682-d3bc-489f-8e63-63414e6f9cd1
Record created	2012-07-23
Record modified	2024-03-22

Date modified:: 2024-04-19