Numerical Study of Elastic Properties of ITZ in Hydrating Cement Paste

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Numerical Study of Elastic Properties of ITZ in Hydrating Cement Paste

Popis výsledku v původním jazyce

The interfacial transition zone (ITZ) represents a serious problem when homogenizing elastic properties of cement mortar or concrete. Although many mechanisms contribute to its origin and evolution, only the wall effect will be studied. Commonly acceptedthickness of ITZ, as it appears around the aggregates, is in the range from 0 to 50 ?m. Cement hydration program CEMHYD3D extended with the percolation filtering will be used for the reconstruction of the ITZ and following hydration. Imposing periodic boundary conditions and using FEM leads to effective homogenized elastic properties of ITZ. Depending on the cement fineness, the reduction of Young's modulus against bulk paste was found up to 40 % while Poisson's ratio remained almost the same for the ITZ thickness of 24 ?m. Validation on mortar samples shows that the results are in accordance with experiment.

Název v anglickém jazyce

Numerical Study of Elastic Properties of ITZ in Hydrating Cement Paste

Popis výsledku anglicky

The interfacial transition zone (ITZ) represents a serious problem when homogenizing elastic properties of cement mortar or concrete. Although many mechanisms contribute to its origin and evolution, only the wall effect will be studied. Commonly acceptedthickness of ITZ, as it appears around the aggregates, is in the range from 0 to 50 ?m. Cement hydration program CEMHYD3D extended with the percolation filtering will be used for the reconstruction of the ITZ and following hydration. Imposing periodic boundary conditions and using FEM leads to effective homogenized elastic properties of ITZ. Depending on the cement fineness, the reduction of Young's modulus against bulk paste was found up to 40 % while Poisson's ratio remained almost the same for the ITZ thickness of 24 ?m. Validation on mortar samples shows that the results are in accordance with experiment.

Druh

D - Stať ve sborníku

CEP obor

JI - Kompositní materiály

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2006

Kód důvěrnosti údajů

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

Název statě ve sborníku

Advances in Concrete through Science and Engineering, Proceedings of the 2nd International Symposium

ISBN

2-35158-003-6

ISSN

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e-ISSN

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Počet stran výsledku

11

Strana od-do

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Název nakladatele

Rilem Publications s.a.r.l.

Místo vydání

Bagneux

Místo konání akce

Quebec City

Datum konání akce

11. 9. 2006

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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