Dependence of fineness of calcium carbonate on the hydration behaviour of tricalcium silicate

From National Research Council Canada

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Author	Search for: Ramachandran, V. S.¹; Search for: Zhang, C. M.
Affiliation	National Research Council of Canada. NRC Institute for Research in Construction
Format	Text, Article
Subject	limestone; hydration; cement; silicate minerals; aggregates; cements; admixtures; physical properties; chemical properties; microstructure; caco3; hydration rate; non-evaporable water contents; scanning electron microscopy (sem); limestone; Concrete; hydratation; ciment; mineral silicate; granulat; pierre à chaux
Abstract	Tricalcium silicate (C3S) was hydrated at water/solid ratios of 0.7 and 2.0 in the presence of 0, 5, 10, 15 and 50 % CaCO3. Calcium carbonate of various mean particle sizes (3. 2, 4.4, 10.7, 14.5, 21.0 and 77.0 mu-m) was added to C3S and the rate of hydration followed by determining Ca(OH)2 and non-evaporable water contents as well as degree of hydration of C3S. Addition of CaCO3 accelerated hydration, the effect increasing with the amount and fineness of CaCO3. The CaOSiO 2 ratio increased slightly in the presence of CaCO3. There is evidence that as much as 25 % of the added CaCO3 was incorporated into the CSH phase when C3S was hydratred with 5% CaCO3 for three days. Scanning electron microscope ( SEM) examination revealed that hydration products grow on both C3S and CaCO3 particles.
Publication date	1986
In	Durability of Building Materials 4 (1986): 45–66.
Language	English
Peer reviewed	Yes
Identifier	IRC-P-1435
NRC number	NRCC 27141 NRC-IRC-3070
NPARC number	20375910
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Record identifier	1a664087-d0c2-40a9-8528-83dbfdbb35de
Record created	2012-07-23
Record modified	2020-06-06

Date modified:: 2024-04-20