Drying Concrete: Experimental and Numerical Modeling

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F16%3A00242988" target="_blank" >RIV/68407700:21110/16:00242988 - isvavai.cz</a>

Výsledek na webu

<a href="http://ascelibrary.org/doi/10.1061/%28ASCE%29MT.1943-5533.0001577" target="_blank" >http://ascelibrary.org/doi/10.1061/%28ASCE%29MT.1943-5533.0001577</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1061/(ASCE)MT.1943-5533.0001577" target="_blank" >10.1061/(ASCE)MT.1943-5533.0001577</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Drying Concrete: Experimental and Numerical Modeling

Popis výsledku v původním jazyce

Drying of concrete is a major reason for concrete shrinkage, which significantly influences cracking and durability of concrete structures. Therefore a pilot test was executed in which progressive drying of concrete was measured at different depths under the concrete surface exposed to environmental conditions. Pore relative humidity distribution throughout a cross section (in depths from 3 to 10 cm) of concrete specimens was measured experimentally over the time range of 10 months. Then a moisture diffusion process is formulated mathematically and solved using recent models for moisture diffusivity and moisture capacity, and taking its nonlinearity into account. Numerical modeling is carried out using finite elements implemented into advanced numerical algorithm. Simplified analysis is also provided. Measured and calculated values are compared and moisture diffusivity is calibrated to the experimental results. Comparisons between measured and calculated values have pointed to the complexity of the drying process as well as the incapability of the used models to predict drying of concrete with the desired precision. This experiment is a pilot test of an experimental program and verifies the feasibility of humidity measurements.

Název v anglickém jazyce

Drying Concrete: Experimental and Numerical Modeling

Popis výsledku anglicky

Drying of concrete is a major reason for concrete shrinkage, which significantly influences cracking and durability of concrete structures. Therefore a pilot test was executed in which progressive drying of concrete was measured at different depths under the concrete surface exposed to environmental conditions. Pore relative humidity distribution throughout a cross section (in depths from 3 to 10 cm) of concrete specimens was measured experimentally over the time range of 10 months. Then a moisture diffusion process is formulated mathematically and solved using recent models for moisture diffusivity and moisture capacity, and taking its nonlinearity into account. Numerical modeling is carried out using finite elements implemented into advanced numerical algorithm. Simplified analysis is also provided. Measured and calculated values are compared and moisture diffusivity is calibrated to the experimental results. Comparisons between measured and calculated values have pointed to the complexity of the drying process as well as the incapability of the used models to predict drying of concrete with the desired precision. This experiment is a pilot test of an experimental program and verifies the feasibility of humidity measurements.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JN - Stavebnictví

OECD FORD obor

—

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Journal of Materials in Civil Engineering (ASCE)

ISSN

0899-1561

e-ISSN

—

Svazek periodika

28

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

—

Kód UT WoS článku

000383143300010

EID výsledku v databázi Scopus

2-s2.0-84982315641