Creep and shrinkage of concrete under cyclic ambient humidity conditions

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Original languageEnglish
Title of host publication14th fib Phd Symposium in Civil Engineering, 2022, Proceedings
EditorsMarco di Prisco, Alberto Meda, Gyorgy L. Balazs
Pages345-352
Number of pages8
Publication statusPublished - 2022
Event14th fib PhD Symposium in Civil Engineering, 2022 - Rome, Italy
Duration: 5 Sept 20227 Sept 2022

Publication series

Namefib Symposium
ISSN (Print)2617-4820

Abstract

Creep and shrinkage are strongly influenced by the moisture content of the concrete as well as the ambient humidity. Variations in the humidity as normally observed in outdoor structures are currently covered in fib Model Code 2010 by using the time-average of ambient humidity. However, the effect of cyclic humidity on creep and shrinkage compared to the constant mean humidity has been barely investigated. In this paper, the development of creep and shrinkage of a normal-strength concrete C30/37 with two pre-adjusted moisture contents subjected to cyclic and constant humidity conditions, respectively, are comparatively presented. The results demonstrate that the creep strains are increased up to 47 % due to cyclic humidity compared to those due to the corresponding average constant humidity. Therefore, existing models need to be modified to take this effect into account.

ASJC Scopus subject areas

Cite this

Creep and shrinkage of concrete under cyclic ambient humidity conditions. / Podhajecky, Anna Lena; Oneschkow, Nadja; Haist, Michael.
14th fib Phd Symposium in Civil Engineering, 2022, Proceedings. ed. / Marco di Prisco; Alberto Meda; Gyorgy L. Balazs. 2022. p. 345-352 (fib Symposium).

Research output: Chapter in book/report/conference proceedingConference contributionResearchpeer review

Podhajecky, AL, Oneschkow, N & Haist, M 2022, Creep and shrinkage of concrete under cyclic ambient humidity conditions. in M di Prisco, A Meda & GL Balazs (eds), 14th fib Phd Symposium in Civil Engineering, 2022, Proceedings. fib Symposium, pp. 345-352, 14th fib PhD Symposium in Civil Engineering, 2022, Rome, Italy, 5 Sept 2022.
Podhajecky, A. L., Oneschkow, N., & Haist, M. (2022). Creep and shrinkage of concrete under cyclic ambient humidity conditions. In M. di Prisco, A. Meda, & G. L. Balazs (Eds.), 14th fib Phd Symposium in Civil Engineering, 2022, Proceedings (pp. 345-352). (fib Symposium).
Podhajecky AL, Oneschkow N, Haist M. Creep and shrinkage of concrete under cyclic ambient humidity conditions. In di Prisco M, Meda A, Balazs GL, editors, 14th fib Phd Symposium in Civil Engineering, 2022, Proceedings. 2022. p. 345-352. (fib Symposium).
Podhajecky, Anna Lena ; Oneschkow, Nadja ; Haist, Michael. / Creep and shrinkage of concrete under cyclic ambient humidity conditions. 14th fib Phd Symposium in Civil Engineering, 2022, Proceedings. editor / Marco di Prisco ; Alberto Meda ; Gyorgy L. Balazs. 2022. pp. 345-352 (fib Symposium).
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title = "Creep and shrinkage of concrete under cyclic ambient humidity conditions",
abstract = "Creep and shrinkage are strongly influenced by the moisture content of the concrete as well as the ambient humidity. Variations in the humidity as normally observed in outdoor structures are currently covered in fib Model Code 2010 by using the time-average of ambient humidity. However, the effect of cyclic humidity on creep and shrinkage compared to the constant mean humidity has been barely investigated. In this paper, the development of creep and shrinkage of a normal-strength concrete C30/37 with two pre-adjusted moisture contents subjected to cyclic and constant humidity conditions, respectively, are comparatively presented. The results demonstrate that the creep strains are increased up to 47 % due to cyclic humidity compared to those due to the corresponding average constant humidity. Therefore, existing models need to be modified to take this effect into account.",
author = "Podhajecky, {Anna Lena} and Nadja Oneschkow and Michael Haist",
note = "Funding Information: This research was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) within the project “Creep and shrinkage at variable hygric exposures”, project number 327002599. The authors would like to express their gratitude for the financial support. ; 14th fib PhD Symposium in Civil Engineering, 2022 ; Conference date: 05-09-2022 Through 07-09-2022",
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Download

TY - GEN

T1 - Creep and shrinkage of concrete under cyclic ambient humidity conditions

AU - Podhajecky, Anna Lena

AU - Oneschkow, Nadja

AU - Haist, Michael

N1 - Funding Information: This research was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) within the project “Creep and shrinkage at variable hygric exposures”, project number 327002599. The authors would like to express their gratitude for the financial support.

PY - 2022

Y1 - 2022

N2 - Creep and shrinkage are strongly influenced by the moisture content of the concrete as well as the ambient humidity. Variations in the humidity as normally observed in outdoor structures are currently covered in fib Model Code 2010 by using the time-average of ambient humidity. However, the effect of cyclic humidity on creep and shrinkage compared to the constant mean humidity has been barely investigated. In this paper, the development of creep and shrinkage of a normal-strength concrete C30/37 with two pre-adjusted moisture contents subjected to cyclic and constant humidity conditions, respectively, are comparatively presented. The results demonstrate that the creep strains are increased up to 47 % due to cyclic humidity compared to those due to the corresponding average constant humidity. Therefore, existing models need to be modified to take this effect into account.

AB - Creep and shrinkage are strongly influenced by the moisture content of the concrete as well as the ambient humidity. Variations in the humidity as normally observed in outdoor structures are currently covered in fib Model Code 2010 by using the time-average of ambient humidity. However, the effect of cyclic humidity on creep and shrinkage compared to the constant mean humidity has been barely investigated. In this paper, the development of creep and shrinkage of a normal-strength concrete C30/37 with two pre-adjusted moisture contents subjected to cyclic and constant humidity conditions, respectively, are comparatively presented. The results demonstrate that the creep strains are increased up to 47 % due to cyclic humidity compared to those due to the corresponding average constant humidity. Therefore, existing models need to be modified to take this effect into account.

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BT - 14th fib Phd Symposium in Civil Engineering, 2022, Proceedings

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