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

作者：Oh Jae Eun; Clark Simon M; Monteiro Paulo J M^*

来源：Cement and Concrete Research, 2011, 41(1): 102-106.

DOI：10.1016/j.cemconres.2010.09.010

• Calcium silicate hydrate (C-S-H)
• X-ray diffraction
• Elastic moduli
• Mechanical properties
• Alkali-activated cement

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(l) 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, 6, 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.

• 出版日期2011-1