Early-age evolution of compressive strength of cement pastes, mortars, and concretes: a validated engineering mechanical model

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F18%3A00495381" target="_blank" >RIV/68378297:_____/18:00495381 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Early-age evolution of compressive strength of cement pastes, mortars, and concretes: a validated engineering mechanical model
Original language description
Since the pioneering developments of Féret (1892) and Abrams (1919), cement and concrete research has aimed at relating the composition and maturity of cementitious material to their uniaxial compressive strength. These research activities were mainly related to the development of empirical fitting functions. Herein, a more fundamental approach based on continuum micromechanics is presented [1]. The macroscopic loading applied onto a specimen of concrete or mortar, is first translated into stress peaks related to cement paste volumes located in the interfacial transition zones (ITZ) around the aggregates. These stress states are further translated into stress peaks related to microscopic hydrate needles, based on second-order stress averages. These effective stresses of the hydrate needles enter a Drucker-Prager failure criterion with material constants quantified based on nanoindentation tests into low-density calcium-silicate-hydrates. Predictions of the engineering mechanics model agree well with macroscopic strength measurements referring to the material scales of cement pastes, mortars, and concretes.
Czech name
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Czech description
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Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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