Multiscale Micromechanical Damage Model for Compressive Strength Based on Cement Paste Microstructure

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

Multiscale Micromechanical Damage Model for Compressive Strength Based on Cement Paste Microstructure

Popis výsledku v původním jazyce

Compressive strength is one of the most important and tested mechanical properties of cement paste. This paper presents a new four-level micromechanical model for compressive strength applicable on both pure and blended cement pastes. The model assumes that intrinsic tensile strength of C-S-H globules governs the compressive strength of cement paste. Crack propagation on all hierarchical levels starts once tensile stresses on a randomly inclined ellipsoidal inclusions within C-S-H exceed cohesive stress. The inclusion of unhydrated clinker, supplementary cementitious materials, other hydration products, or entrapped (or entrained) air further decreases the compressive strength of cement paste. The multiscale model uses volume fractions of principal chemical phases as input parameters as well as introduces a spatial gradient of C-S-H between individual grains which has a pronounced impact on predicted compressive strength. Calibration of the model on 95 experimental compressive strength

Název v anglickém jazyce

Multiscale Micromechanical Damage Model for Compressive Strength Based on Cement Paste Microstructure

Popis výsledku anglicky

Compressive strength is one of the most important and tested mechanical properties of cement paste. This paper presents a new four-level micromechanical model for compressive strength applicable on both pure and blended cement pastes. The model assumes that intrinsic tensile strength of C-S-H globules governs the compressive strength of cement paste. Crack propagation on all hierarchical levels starts once tensile stresses on a randomly inclined ellipsoidal inclusions within C-S-H exceed cohesive stress. The inclusion of unhydrated clinker, supplementary cementitious materials, other hydration products, or entrapped (or entrained) air further decreases the compressive strength of cement paste. The multiscale model uses volume fractions of principal chemical phases as input parameters as well as introduces a spatial gradient of C-S-H between individual grains which has a pronounced impact on predicted compressive strength. Calibration of the model on 95 experimental compressive strength

Druh

D - Stať ve sborníku

CEP obor

JN - Stavebnictví

OECD FORD obor

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Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název statě ve sborníku

CONCREEP-10 Mechanics and Physics of Creep, Shrinkage, and Durability of Concrete and Concrete Structures

ISBN

978-0-7844-7934-6

ISSN

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e-ISSN

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Počet stran výsledku

8

Strana od-do

1211-1218

Název nakladatele

Vienna University Of Technology, Institute For Mechanics of Materials and Structures

Místo vydání

Vienna

Místo konání akce

Vídeň

Datum konání akce

21. 9. 2015

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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