Yang, K, Basheer, M orcid.org/0000-0002-0835-8029, Long, A et al. (4 more authors) (2018) Design of an in situ steady-state permeability test to determine the air permeability of covercrete. In: ICDCS 2018: Sixth International Conference on Durability of Concrete Structures. The 6th international conference on durability of concrete structures, 18-20 Jul 2018 Whittles Publishing ISBN 978-1849953948
Abstract
An in situ permeability test method that does not require assumptions for the uni-directional flow has been developed to determine the air permeability coefficient of the near surface concrete. The proposed method involves applying a constant pressure head to a surface mounted ring and measuring steady state air flow rates. The analysis is based on modification of the flow net theory, which needs a calibration factor accounting for the influence of specimen and ring geometries. Effects of test area, width of seal, depth and width of test specimen were investigated using numerical simulation of air flow. The results indicated that the value of the calibration is very sensitive to change of testing area which needs to be corrected for a specimen with a depth less than 50 mm. The experimental studies suggest the duration to achieve the steady state depends on the quality of the concrete tested and the applied pressure. The results indicated that the test method is capable of identifying the difference in quality of concretes.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | This article is protected by copyright. This is an author produced version of a conference paper published in ICDCS 2018: Sixth International Conference on Durability of Concrete Structures. Uploaded with permission from the publisher. |
Keywords: | flow net; steady-state state; in situ air permeability test; covercrete |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Civil Engineering (Leeds) > Institute for Resilient Infrastructure (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 16 Nov 2018 14:54 |
Last Modified: | 25 Jun 2023 21:36 |
Published Version: | https://www.whittlespublishing.com/ICDCS |
Status: | Published |
Publisher: | Whittles Publishing |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:138724 |