An analysis of the applicability of existing shrinkage prediction models to concretes containing steel fibres or crumb rubber

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F19%3A00330026" target="_blank" >RIV/68407700:21110/19:00330026 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.jobe.2019.02.021" target="_blank" >https://doi.org/10.1016/j.jobe.2019.02.021</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jobe.2019.02.021" target="_blank" >10.1016/j.jobe.2019.02.021</a>

Jazyk výsledku

angličtina

Název v původním jazyce

An analysis of the applicability of existing shrinkage prediction models to concretes containing steel fibres or crumb rubber

Popis výsledku v původním jazyce

Shrinkage is one of the most important phenomena influencing the long-term behaviour of concrete structures. Several models for prediction of shrinkage strains have been developed in the past. Despite the fact that all of them have been validated against large experimental data sets, they give diverse results. This paper deals with an analysis of the shrinkage behaviour of five selected concrete mixtures – normal-strength concrete without additional compounds, with crumb rubber, and with steel fibres, and high-strength concrete with and without fibres. Shrinkage strains of these concretes have been monitored for 365 days, and experimental data were compared to four shrinkage prediction models (model B3, model B4 and two Eurocode 2 models). The main objectives of the research were to study the effects of fibres and crumb rubber on concrete shrinkage behaviour and to analyse suitability of the prediction models for the materials with additional compounds, laying partly outside the applicability limits of the models. Uncertainty and variance of two input parameters (compressive strength and relative humidity) was taken into account by means of reliability analysis. Steel fibres were found to mitigate the influence of shrinkage; crumb rubber did not improve the shrinkage behaviour. Eurocode 2 and B3 models were able to predict shrinkage of normal-strength concrete well in the presence of additional compounds. B3 prediction was accurate also for fibre-reinforced high-strength concrete, while B4 exhibited the best fit in the case of high-strength concrete without fibres.

Název v anglickém jazyce

An analysis of the applicability of existing shrinkage prediction models to concretes containing steel fibres or crumb rubber

Popis výsledku anglicky

Shrinkage is one of the most important phenomena influencing the long-term behaviour of concrete structures. Several models for prediction of shrinkage strains have been developed in the past. Despite the fact that all of them have been validated against large experimental data sets, they give diverse results. This paper deals with an analysis of the shrinkage behaviour of five selected concrete mixtures – normal-strength concrete without additional compounds, with crumb rubber, and with steel fibres, and high-strength concrete with and without fibres. Shrinkage strains of these concretes have been monitored for 365 days, and experimental data were compared to four shrinkage prediction models (model B3, model B4 and two Eurocode 2 models). The main objectives of the research were to study the effects of fibres and crumb rubber on concrete shrinkage behaviour and to analyse suitability of the prediction models for the materials with additional compounds, laying partly outside the applicability limits of the models. Uncertainty and variance of two input parameters (compressive strength and relative humidity) was taken into account by means of reliability analysis. Steel fibres were found to mitigate the influence of shrinkage; crumb rubber did not improve the shrinkage behaviour. Eurocode 2 and B3 models were able to predict shrinkage of normal-strength concrete well in the presence of additional compounds. B3 prediction was accurate also for fibre-reinforced high-strength concrete, while B4 exhibited the best fit in the case of high-strength concrete without fibres.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GA17-19463S" target="_blank" >GA17-19463S: Analýza závislostí mezi mikrostrukturou a makroskopickými vlastnostmi ultravysokohodnotných betonů</a><br>

Návaznosti

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

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Journal of Building Engineering

ISSN

2352-7102

e-ISSN

2352-7102

Svazek periodika

24

Číslo periodika v rámci svazku

07

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

—

Kód UT WoS článku

000473191200003

EID výsledku v databázi Scopus

2-s2.0-85062273245