Does the Al substitution in C–S–H(I) change its mechanical property?

Jae Eun Oh, Simon M. Clark, Paulo J. M. Monteiro

Research output: Contribution to journalArticlepeer-review

52 Scopus citations


This study examines the influence of Al substitution for Si on the bulk modulus of calcium silicate hydrate I [C-S-H(I)], a structural analogue of C-S-H, by performing high-pressure synchrotron X-ray diffraction experiments in two C-S-H(I) samples: one a hydration product of alkali-activated slag and the other a synthetic C-S-H(I). The test result shows that not only the bulk modulus but also the incompressibility of the lattice parameters a, b, and c of two C-S-H(I) samples are very similar to each other, regardless of the Al substitution. This result may be due to the four-coordinated configuration of the substituted Al, which makes the dreierketten silicate chains maintain the same arrangement after the substitution. © 2010 Elsevier Ltd.
Original languageEnglish (US)
Pages (from-to)102-106
Number of pages5
JournalCement and Concrete Research
Issue number1
StatePublished - Jan 2011
Externally publishedYes

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): KUS-l1-004021
Acknowledgements: This publication was based on work supported in part by Award No. KUS-l1-004021, made by King Abdullah University of Science and Technology (KAUST). The Advanced Light Source is supported by the Director, Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.


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