Details
| Originalsprache | Englisch |
|---|---|
| Aufsatznummer | 043127 |
| Fachzeitschrift | Physical Review Research |
| Jahrgang | 3 |
| Ausgabenummer | 4 |
| Publikationsstatus | Veröffentlicht - Dez. 2021 |
Abstract
From soft polymeric gels to hardened cement paste, amorphous solids under constant load exhibit a pronounced time-dependent deformation called creep. The microscopic mechanism of such a phenomenon is poorly understood in amorphous materials and constitutes an even greater challenge in densely packed and chemically reactive granular systems. Both features are prominently present in hydrating cement pastes composed of calcium silicate hydrate (C-S-H) nanoparticles, whose packing density increases as a function of time, while cement hydration is taking place. Performing nanoindentation tests and porosity measurements on a large collection of samples at various stages of hydration, we show that the creep response of hydrating cement paste is mainly controlled by the interparticle distance and results from slippage between (C-S-H) nanoparticles. Our findings provide a unique insight into the microscopic mechanism underpinning the creep response in aging granular materials, thus paving the way for the design of concrete with improved creep resistance.
ASJC Scopus Sachgebiete
- Physik und Astronomie (insg.)
- Allgemeine Physik und Astronomie
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in: Physical Review Research, Jahrgang 3, Nr. 4, 043127, 12.2021.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Creep in reactive colloidal gels
T2 - A nanomechanical study of cement hydrates
AU - Haist, Michael
AU - Divoux, Thibaut
AU - Krakowiak, Konrad J.
AU - Skibsted, Jørgen
AU - Pellenq, Roland J.M.
AU - Müller, Harald S.
AU - Ulm, Franz Josef
N1 - Funding Information: This work was funded by a research stipend of the German Research Foundation (Deutsche Forschungsgemeinschaft, DFG) to M.H. (Reference No. HA 7917/1-1). The authors thank N. Chatterjee (MIT-EAS) for support in carrying out the WDS mappings as well as K. Ioannidou, S. Yip, P. Stemmermann, K. Garbev, and T. Petersen for extremely fruitful discussions.
PY - 2021/12
Y1 - 2021/12
N2 - From soft polymeric gels to hardened cement paste, amorphous solids under constant load exhibit a pronounced time-dependent deformation called creep. The microscopic mechanism of such a phenomenon is poorly understood in amorphous materials and constitutes an even greater challenge in densely packed and chemically reactive granular systems. Both features are prominently present in hydrating cement pastes composed of calcium silicate hydrate (C-S-H) nanoparticles, whose packing density increases as a function of time, while cement hydration is taking place. Performing nanoindentation tests and porosity measurements on a large collection of samples at various stages of hydration, we show that the creep response of hydrating cement paste is mainly controlled by the interparticle distance and results from slippage between (C-S-H) nanoparticles. Our findings provide a unique insight into the microscopic mechanism underpinning the creep response in aging granular materials, thus paving the way for the design of concrete with improved creep resistance.
AB - From soft polymeric gels to hardened cement paste, amorphous solids under constant load exhibit a pronounced time-dependent deformation called creep. The microscopic mechanism of such a phenomenon is poorly understood in amorphous materials and constitutes an even greater challenge in densely packed and chemically reactive granular systems. Both features are prominently present in hydrating cement pastes composed of calcium silicate hydrate (C-S-H) nanoparticles, whose packing density increases as a function of time, while cement hydration is taking place. Performing nanoindentation tests and porosity measurements on a large collection of samples at various stages of hydration, we show that the creep response of hydrating cement paste is mainly controlled by the interparticle distance and results from slippage between (C-S-H) nanoparticles. Our findings provide a unique insight into the microscopic mechanism underpinning the creep response in aging granular materials, thus paving the way for the design of concrete with improved creep resistance.
UR - http://www.scopus.com/inward/record.url?scp=85119998435&partnerID=8YFLogxK
U2 - 10.1103/PhysRevResearch.3.043127
DO - 10.1103/PhysRevResearch.3.043127
M3 - Article
AN - SCOPUS:85119998435
VL - 3
JO - Physical Review Research
JF - Physical Review Research
SN - 2643-1564
IS - 4
M1 - 043127
ER -