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

Identifikátory výsledku

  • Kód výsledku v 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>

  • Výsledek na webu

  • DOI - Digital Object Identifier

Alternativní jazyky

  • Jazyk výsledku

    angličtina

  • Název v původním jazyce

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

  • Popis výsledku v původním jazyce

    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.

  • Název v anglickém jazyce

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

  • Popis výsledku anglicky

    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.

Klasifikace

  • Druh

    O - Ostatní výsledky

  • CEP obor

  • OECD FORD obor

    20501 - Materials engineering

Návaznosti výsledku

  • Projekt

  • Návaznosti

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Ostatní

  • Rok uplatnění

    2018

  • Kód důvěrnosti údajů

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů