Homogenization of transport processes and hydration phenomena in fresh concrete

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F20%3A00340243" target="_blank" >RIV/68407700:21110/20:00340243 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.14311/AP.2020.60.0012" target="_blank" >https://doi.org/10.14311/AP.2020.60.0012</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.14311/AP.2020.60.0012" target="_blank" >10.14311/AP.2020.60.0012</a>

Result language

angličtina

Original language name

Homogenization of transport processes and hydration phenomena in fresh concrete

Original language description

The problem of hydration and transport processes in fresh concrete is strongly coupled and non-linear, and therefore, very difficult for a numerical modelling. Physically accurate results can be obtained using fine-scale simulations, which are, however, extremely time consuming. Therefore, there is an interest in developing new physically accurate and computationally effective models. In the paper, a new fully coupled two-scale (meso-macro) homogenization framework for modelling of simultaneous heat transfer, moisture flows, and hydration phenomena in fresh concrete is proposed. A modified mesoscale model is first introduced. In this model, concrete is assumed as a composite material with two periodically distributed mesoscale components, cement paste and aggregates. A homogenized model is then derived by an upscaling method from the mesoscale model. The coefficients for the homogenized model are obtained from the solution of a periodic cell problem. For solving the periodic cell problem, two approaches are used - a standard finite element method and a simplified closed-form approximation taken from literature. The homogenization framework is then implemented in MATLAB environment and finally employed for illustrative numerical experiments, which verify that the homogenized model provides physically accurate results comparable with the results obtained by the mesoscale model. Moreover, it is verified that using the homogenization framework with a closed-form approach to the periodic cell problem, significant computational cost savings can be achieved.

Czech name

—

Czech description

—

Type

J_SC - Article in a specialist periodical, which is included in the SCOPUS database

CEP classification

—

OECD FORD branch

20101 - Civil engineering

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

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

Publication year

2020

Confidentiality

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

Name of the periodical

Acta Polytechnica

ISSN

1210-2709

e-ISSN

1805-2363

Volume of the periodical

60

Issue of the periodical within the volume

1

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

13

Pages from-to

12-24

UT code for WoS article

000518459900002

EID of the result in the Scopus database

2-s2.0-85081246013