Sorgner, M., Diaz Flores, R., Pichler, B., Pilgerstorfer, T., Moritz, A. B., & Hellmich, C. (2025). Basic creep properties of hydrates in mature slag-based CEM II concretes: A micromechanical analysis. Cement and Concrete Research, 189, 1–19. https://doi.org/10.1016/j.cemconres.2024.107735
E202-03 - Forschungsbereich Baustatik und experimentelle Mechanik E202-01 - Forschungsbereich Festigkeitslehre und Biomechanik
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Journal:
Cement and Concrete Research
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ISSN:
0008-8846
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Date (published):
Mar-2025
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Number of Pages:
19
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Publisher:
PERGAMON-ELSEVIER SCIENCE LTD
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Peer reviewed:
Yes
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Keywords:
Slag-based CEM II hydrates; Basic creep; Micromechanics; Aging creep; Long-term creep
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Abstract:
The demand for accurate characterization of slag-based CEM II concretes is becoming increasingly important as the construction sector shifts towards eco-efficient materials. Here, the basic creep behavior of slag-based CEM II concretes is traced back to mixture-invariant hydrate properties. Therefore, an experimentally validated three-step micro-viscoelastic model for CEM I/OPC-concretes is complemented by a Powers-Acker-type hydration model for CEM II and extended towards long-term creep, temperature activation, and moisture sensitivity. This model is used for a strain rate-based, aging viscoelastic analysis of two creep tests on distinctively different CEM II concretes; revealing that the shear creep modulus of CEM II hydrates is half as large as the one of ordinary Portland cement hydrates. This makes slag-based CEM II concretes especially suitable for applications such as precast segmental tunnel linings, where a faster stress relaxation under displacement-controlled conditions is beneficial.
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Research Areas:
Composite Materials: 50% Modeling and Simulation: 50%
CC BY 4.0
