Journal article
Mass density and water content of saturated never-dried calcium silicate hydrates.
- da Silva JC †Paul Scherrer Institut, Villigen PSI, 5232, Switzerland.
- Trtik P †Paul Scherrer Institut, Villigen PSI, 5232, Switzerland.
- Diaz A †Paul Scherrer Institut, Villigen PSI, 5232, Switzerland.
- Holler M †Paul Scherrer Institut, Villigen PSI, 5232, Switzerland.
- Guizar-Sicairos M †Paul Scherrer Institut, Villigen PSI, 5232, Switzerland.
- Raabe J †Paul Scherrer Institut, Villigen PSI, 5232, Switzerland.
- Bunk O †Paul Scherrer Institut, Villigen PSI, 5232, Switzerland.
- Menzel A †Paul Scherrer Institut, Villigen PSI, 5232, Switzerland.
- 2015-03-21
Published in:
- Langmuir : the ACS journal of surfaces and colloids. - 2015
English
Calcium silicate hydrates (C-S-H) are the most abundant hydration products in ordinary Portland cement paste. Yet, despite the critical role they play in determining mechanical and transport properties, there is still a debate about their density and exact composition. Here, the site-specific mass density and composition of C-S-H in hydrated cement paste are determined with nanoscale resolution in a nondestructive approach. We used ptychographic X-ray computed tomography in order to determine spatially resolved mass density and water content of the C-S-H within the microstructure of the cement paste. Our findings indicate that the C-S-H at the border of hydrated alite particles possibly have a higher density than the apparent inner-product C-S-H, which is contrary to the common expectations from previous works on hydrated cement paste.
- Language
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- English
- Open access status
- hybrid
- Identifiers
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- DOI 10.1021/la504478j
- PMID 25794183
- Persistent URL
- https://sonar.ch/global/documents/93075
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