Modeling Drying Shrinkage and the Creep of Concrete at the Meso-Level

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F15%3A00235215" target="_blank" >RIV/68407700:21110/15:00235215 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1061/9780784479346.033" target="_blank" >http://dx.doi.org/10.1061/9780784479346.033</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1061/9780784479346.033" target="_blank" >10.1061/9780784479346.033</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Modeling Drying Shrinkage and the Creep of Concrete at the Meso-Level

Popis výsledku v původním jazyce

Creep and shrinkage are complicated time-dependent processes taking place in cementitious materials. Creep refers to a stress-induced increasing deformation at constant stress while shrinkage is stress-independent. In typical concretes, the most significant part of shrinkage is represented by drying shrinkage; it is caused by a decrease in relative humidity of pores which leads to an increase in capillary tension of pore water and in the solid surface tension at pore walls. Experimental data indicate that the ultimate value of drying shrinkagemeasured on concrete and mortar specimens is a nonlinear function of the ambient relative humidity. The nonlinear behavior is partially caused by microcracking, and partially by creep of the cement matrix. On theother hand, drying shrinkage of hardened cement paste, measured on very thin specimens at gradually decreasing relative humidity, is found to be a linear function of relative humidity. The aim of this paper is to assess the nature of the

Název v anglickém jazyce

Modeling Drying Shrinkage and the Creep of Concrete at the Meso-Level

Popis výsledku anglicky

Creep and shrinkage are complicated time-dependent processes taking place in cementitious materials. Creep refers to a stress-induced increasing deformation at constant stress while shrinkage is stress-independent. In typical concretes, the most significant part of shrinkage is represented by drying shrinkage; it is caused by a decrease in relative humidity of pores which leads to an increase in capillary tension of pore water and in the solid surface tension at pore walls. Experimental data indicate that the ultimate value of drying shrinkagemeasured on concrete and mortar specimens is a nonlinear function of the ambient relative humidity. The nonlinear behavior is partially caused by microcracking, and partially by creep of the cement matrix. On theother hand, drying shrinkage of hardened cement paste, measured on very thin specimens at gradually decreasing relative humidity, is found to be a linear function of relative humidity. The aim of this paper is to assess the nature of the

Druh

D - Stať ve sborníku

CEP obor

JJ - Ostatní materiály

OECD FORD obor

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Projekt

<a href="/cs/project/EE2.3.30.0034" target="_blank" >EE2.3.30.0034: Podpora zkvalitnění týmů výzkumu a vývoje a rozvoj intersektorální mobility na ČVUT v Praze</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

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

—

e-ISSN

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Počet stran výsledku

9

Strana od-do

287-295

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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