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Calcium hydroxide distribution and calcium silicate hydrate composition in tricalcium silicate and β-dicalcium silicate pastes

Taylor, H.F.W. / Newbury, D.E.

AbstractPastes of tricalcium silicate (C3S) and β-dicalcium silicate (C2S) 23 years old were studied by electron probe microanalysis. In both cases, regions consisting entirely or largely of calcium hydroxide and of CSH were distinguished on a scale of 2–50 μm. The regions high in CSH accounted for 75–80 percent of the whole in the C3S paste and about 96 percent in the C2S paste; these values are much higher than those initially occupied by anhydrous starting materials. Within the high CSH areas, no compositional variation was detected that could have corresponded to the so-called inner and outer hydrates. The ratio of mean Ca to mean Si in the high CSH areas was found to be 1.72 for the C3S paste and 1.78 for the C2S paste with an exciting beam energy of 10 keV.

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Calcium hydroxide distribution and calcium silicate hydrate composition in tricalcium silicate and β-dicalcium silicate pastes

Taylor, H.F.W. / Newbury, D.E.

AbstractPastes of tricalcium silicate (C3S) and β-dicalcium silicate (C2S) 23 years old were studied by electron probe microanalysis. In both cases, regions consisting entirely or largely of calcium hydroxide and of CSH were distinguished on a scale of 2–50 μm. The regions high in CSH accounted for 75–80 percent of the whole in the C3S paste and about 96 percent in the C2S paste; these values are much higher than those initially occupied by anhydrous starting materials. Within the high CSH areas, no compositional variation was detected that could have corresponded to the so-called inner and outer hydrates. The ratio of mean Ca to mean Si in the high CSH areas was found to be 1.72 for the C3S paste and 1.78 for the C2S paste with an exciting beam energy of 10 keV.

Calcium hydroxide distribution and calcium silicate hydrate composition in tricalcium silicate and β-dicalcium silicate pastes

Taylor, H.F.W. / Newbury, D.E.

AbstractPastes of tricalcium silicate (C3S) and β-dicalcium silicate (C2S) 23 years old were studied by electron probe microanalysis. In both cases, regions consisting entirely or largely of calcium hydroxide and of CSH were distinguished on a scale of 2–50 μm. The regions high in CSH accounted for 75–80 percent of the whole in the C3S paste and about 96 percent in the C2S paste; these values are much higher than those initially occupied by anhydrous starting materials. Within the high CSH areas, no compositional variation was detected that could have corresponded to the so-called inner and outer hydrates. The ratio of mean Ca to mean Si in the high CSH areas was found to be 1.72 for the C3S paste and 1.78 for the C2S paste with an exciting beam energy of 10 keV.

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Title:

Calcium hydroxide distribution and calcium silicate hydrate composition in tricalcium silicate and β-dicalcium silicate pastes

Contributors:

Taylor, H.F.W. (author) / Newbury, D.E. (author)

Published in:

Cement and Concrete Research ; 14 ; 93-98

Publication date:

1983-06-10

Size:

6 pages

ISSN:

DOI:

https://doi.org/10.1016/0008-8846(84)90084-X

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

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