A Multiscale Model for Compressive Strength Evolution of Blended Cement Pastes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F15%3A00231558" target="_blank" >RIV/68407700:21110/15:00231558 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

A Multiscale Model for Compressive Strength Evolution of Blended Cement Pastes

Popis výsledku v původním jazyce

This paper presents a new four-level micromechanical model for prediction of compressive strength of pure and blended cements. The model assumes that compressive strength of cement paste is governed by intrinsic tensile strength of C-S-H globules. Failure under compressive loading is associated with tensile stresses appearing on randomly inclined ellipsoidal inclusions within C-S-H which result in strain softening at all hierarchical levels. The addition of unhydrated clinker, supplementary cementitiousmaterials, remaining hydration products, and entrapped / entrained air further decreases the compressive strength of cement paste. The multiscale model uses relevant volume fractions of chemical phases on each homogenization level and encompasses a spatial gradient of C-S-H inbetween individual grains. Identification of the intrinsic tensile strength of C-S-H globules on 95 experimental compressive strength values showed this strength amounts to 320 MPa. Governing factors responsible fo

Název v anglickém jazyce

A Multiscale Model for Compressive Strength Evolution of Blended Cement Pastes

Popis výsledku anglicky

This paper presents a new four-level micromechanical model for prediction of compressive strength of pure and blended cements. The model assumes that compressive strength of cement paste is governed by intrinsic tensile strength of C-S-H globules. Failure under compressive loading is associated with tensile stresses appearing on randomly inclined ellipsoidal inclusions within C-S-H which result in strain softening at all hierarchical levels. The addition of unhydrated clinker, supplementary cementitiousmaterials, remaining hydration products, and entrapped / entrained air further decreases the compressive strength of cement paste. The multiscale model uses relevant volume fractions of chemical phases on each homogenization level and encompasses a spatial gradient of C-S-H inbetween individual grains. Identification of the intrinsic tensile strength of C-S-H globules on 95 experimental compressive strength values showed this strength amounts to 320 MPa. Governing factors responsible fo

Druh

D - Stať ve sborníku

CEP obor

JN - Stavebnictví

OECD FORD obor

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Projekt

<a href="/cs/project/TE01020168" target="_blank" >TE01020168: Centrum pro efektivní a udržitelnou dopravní infrastrukturu (CESTI)</a><br>

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

Proceedings of the Fifteenth International Conference on Civil, Structural and Environmental Engineering Computing

ISBN

978-1-905088-63-8

ISSN

1759-3433

e-ISSN

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Počet stran výsledku

10

Strana od-do

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Název nakladatele

Civil-Comp Press Ltd

Místo vydání

Stirling

Místo konání akce

Praha

Datum konání akce

1. 9. 2015

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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