Equilibrium Moisture Content of High Strength Concrete Used in Hollow Core Slabs

Kari Vänttinen; Olli Tuominen; Eero Tuominen; Ilkka Valovirta; Pauli Karjala; Ilkka Tuurala; Juha Vinha

doi:10.1088/1742-6596/2654/1/012032

Equilibrium Moisture Content of High Strength Concrete Used in Hollow Core Slabs

Kari Vänttinen, Olli Tuominen, Eero Tuominen, Ilkka Valovirta, Pauli Karjala, Ilkka Tuurala, Juha Vinha

Civil Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific › peer-review

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Abstract

The aim of this study was to measure equilibrium moisture content of hollow core slabs on both hygroscopic and capillary ranges. Because of the fabrication method of hollow core slabs, concrete grades and compacting methods used in the production differ from those used with reinforced concrete structures and elements. Test samples were taken from two slabs delivered by different manufacturers. Both slabs had similar geometry and were made of C50/60 grade concrete. Hygroscopic moisture equilibrium values were determined in climate chambers. Thin test specimens were used to perform tests within a reasonable time. Hygroscopic moisture equilibrium was measured at high relative humidities (RH), from 85 to 97 % RH. These measurements could be connected to the measurements of the retention curve done by a pressure plate. Measurements done in climate chambers and by pressure plate provided coherent results within the accuracies of these two methods. The results of two concrete slabs representing two different manufacturers differed significantly from each other, indicating the deviation of hygrothermal material properties even if the studied slabs were almost identical in many respects. Measured data is especially useful in modelling as well as analysing moisture damages.

Original language	English
Title of host publication	Proceedings of NSB 2023: 13th Nordic Symposium on Building Physics
Publisher	IOP Publishing
Number of pages	8
DOIs	https://doi.org/10.1088/1742-6596/2654/1/012032
Publication status	Published - 2023
Publication type	A4 Article in conference proceedings
Event	Nordic Symposium on Building Physics - Aalborg University, Aalborg, Denmark Duration: 12 Jun 2023 → 14 Jun 2023 https://www.en.build.aau.dk/web/nsb2023

Publication series

Name	Journal of Physics: Conference Series
Volume	2654
ISSN (Print)	1742-6588
ISSN (Electronic)	1742-6596

Conference

Conference	Nordic Symposium on Building Physics
Country/Territory	Denmark
City	Aalborg
Period	12/06/23 → 14/06/23
Internet address	https://www.en.build.aau.dk/web/nsb2023

Keywords

Hollow core slab
building physics
moisture equilibrium
high strength concrete

Publication forum classification

Publication forum level 1

ASJC Scopus subject areas

Civil and Structural Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1088/1742-6596/2654/1/012032Licence: CC BY

Vänttinen_2023_J._Phys. _Conf._Ser._2654_012032Final published version, 492 KBLicence: CC BY

https://urn.fi/URN:NBN:fi:tuni-2023121810988Licence: CC BY

Cite this

Vänttinen, K., Tuominen, O., Tuominen, E., Valovirta, I., Karjala, P., Tuurala, I., & Vinha, J. (2023). Equilibrium Moisture Content of High Strength Concrete Used in Hollow Core Slabs. In Proceedings of NSB 2023: 13th Nordic Symposium on Building Physics (Journal of Physics: Conference Series; Vol. 2654). IOP Publishing. https://doi.org/10.1088/1742-6596/2654/1/012032

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title = "Equilibrium Moisture Content of High Strength Concrete Used in Hollow Core Slabs",

abstract = "The aim of this study was to measure equilibrium moisture content of hollow core slabs on both hygroscopic and capillary ranges. Because of the fabrication method of hollow core slabs, concrete grades and compacting methods used in the production differ from those used with reinforced concrete structures and elements. Test samples were taken from two slabs delivered by different manufacturers. Both slabs had similar geometry and were made of C50/60 grade concrete. Hygroscopic moisture equilibrium values were determined in climate chambers. Thin test specimens were used to perform tests within a reasonable time. Hygroscopic moisture equilibrium was measured at high relative humidities (RH), from 85 to 97 % RH. These measurements could be connected to the measurements of the retention curve done by a pressure plate. Measurements done in climate chambers and by pressure plate provided coherent results within the accuracies of these two methods. The results of two concrete slabs representing two different manufacturers differed significantly from each other, indicating the deviation of hygrothermal material properties even if the studied slabs were almost identical in many respects. Measured data is especially useful in modelling as well as analysing moisture damages.",

keywords = "Hollow core slab, building physics, moisture equilibrium, high strength concrete",

author = "Kari V{\"a}nttinen and Olli Tuominen and Eero Tuominen and Ilkka Valovirta and Pauli Karjala and Ilkka Tuurala and Juha Vinha",

year = "2023",

doi = "10.1088/1742-6596/2654/1/012032",

language = "English",

series = "Journal of Physics: Conference Series",

publisher = "IOP Publishing",

booktitle = "Proceedings of NSB 2023: 13th Nordic Symposium on Building Physics",

note = "Nordic Symposium on Building Physics ; Conference date: 12-06-2023 Through 14-06-2023",

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}

Vänttinen, K, Tuominen, O, Tuominen, E , Valovirta, I, Karjala, P, Tuurala, I & Vinha, J 2023, Equilibrium Moisture Content of High Strength Concrete Used in Hollow Core Slabs. in Proceedings of NSB 2023: 13th Nordic Symposium on Building Physics. Journal of Physics: Conference Series, vol. 2654, IOP Publishing, Nordic Symposium on Building Physics, Aalborg, Denmark, 12/06/23. https://doi.org/10.1088/1742-6596/2654/1/012032

Equilibrium Moisture Content of High Strength Concrete Used in Hollow Core Slabs. / Vänttinen, Kari; Tuominen, Olli; Tuominen, Eero et al.
Proceedings of NSB 2023: 13th Nordic Symposium on Building Physics. IOP Publishing, 2023. (Journal of Physics: Conference Series; Vol. 2654).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific › peer-review

TY - GEN

T1 - Equilibrium Moisture Content of High Strength Concrete Used in Hollow Core Slabs

AU - Vänttinen, Kari

AU - Tuominen, Olli

AU - Tuominen, Eero

AU - Valovirta, Ilkka

AU - Karjala, Pauli

AU - Tuurala, Ilkka

AU - Vinha, Juha

PY - 2023

Y1 - 2023

N2 - The aim of this study was to measure equilibrium moisture content of hollow core slabs on both hygroscopic and capillary ranges. Because of the fabrication method of hollow core slabs, concrete grades and compacting methods used in the production differ from those used with reinforced concrete structures and elements. Test samples were taken from two slabs delivered by different manufacturers. Both slabs had similar geometry and were made of C50/60 grade concrete. Hygroscopic moisture equilibrium values were determined in climate chambers. Thin test specimens were used to perform tests within a reasonable time. Hygroscopic moisture equilibrium was measured at high relative humidities (RH), from 85 to 97 % RH. These measurements could be connected to the measurements of the retention curve done by a pressure plate. Measurements done in climate chambers and by pressure plate provided coherent results within the accuracies of these two methods. The results of two concrete slabs representing two different manufacturers differed significantly from each other, indicating the deviation of hygrothermal material properties even if the studied slabs were almost identical in many respects. Measured data is especially useful in modelling as well as analysing moisture damages.

AB - The aim of this study was to measure equilibrium moisture content of hollow core slabs on both hygroscopic and capillary ranges. Because of the fabrication method of hollow core slabs, concrete grades and compacting methods used in the production differ from those used with reinforced concrete structures and elements. Test samples were taken from two slabs delivered by different manufacturers. Both slabs had similar geometry and were made of C50/60 grade concrete. Hygroscopic moisture equilibrium values were determined in climate chambers. Thin test specimens were used to perform tests within a reasonable time. Hygroscopic moisture equilibrium was measured at high relative humidities (RH), from 85 to 97 % RH. These measurements could be connected to the measurements of the retention curve done by a pressure plate. Measurements done in climate chambers and by pressure plate provided coherent results within the accuracies of these two methods. The results of two concrete slabs representing two different manufacturers differed significantly from each other, indicating the deviation of hygrothermal material properties even if the studied slabs were almost identical in many respects. Measured data is especially useful in modelling as well as analysing moisture damages.

KW - Hollow core slab

KW - building physics

KW - moisture equilibrium

KW - high strength concrete

U2 - 10.1088/1742-6596/2654/1/012032

DO - 10.1088/1742-6596/2654/1/012032

M3 - Conference contribution

T3 - Journal of Physics: Conference Series

BT - Proceedings of NSB 2023: 13th Nordic Symposium on Building Physics

PB - IOP Publishing

T2 - Nordic Symposium on Building Physics

Y2 - 12 June 2023 through 14 June 2023

ER -

Equilibrium Moisture Content of High Strength Concrete Used in Hollow Core Slabs

Abstract

Publication series

Conference

Keywords

Publication forum classification

ASJC Scopus subject areas

UN SDGs

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