Design of an in situ steady-state permeability test to determine the air permeability of covercrete

K. Yang; P. A.M. Basheer; A. E. Long; S. Nanukuttan; C. Yang; Y. Wang; S. Mu

Design of an in situ steady-state permeability test to determine the air permeability of covercrete

K. Yang, P. A.M. Basheer, A. E. Long, S. Nanukuttan, C. Yang, Y. Wang, S. Mu

School of Natural and Built Environment

Research output: Chapter in Book/Report/Conference proceeding › Chapter

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.

Original language	English
Title of host publication	6th International Conference on Durability of Concrete Structures, ICDCS 2018
Publisher	Whittles Publishing Limited
Pages	525-531
Number of pages	7
ISBN (Print)	1849953945
Publication status	Published - 2018

Publication series

Name	6th International Conference on Durability of Concrete Structures, ICDCS 2018

Keywords

Covercrete
Flow net
In situ air permeability test
Steady-state state

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Yang, K., Basheer, P. A. M., Long, A. E., Nanukuttan, S., Yang, C., Wang, Y., & Mu, S. (2018). Design of an in situ steady-state permeability test to determine the air permeability of covercrete. In 6th International Conference on Durability of Concrete Structures, ICDCS 2018 (pp. 525-531). (6th International Conference on Durability of Concrete Structures, ICDCS 2018). Whittles Publishing Limited.

Yang, K. ; Basheer, P. A.M. ; Long, A. E. ; Nanukuttan, S. ; Yang, C. ; Wang, Y. ; Mu, S. / Design of an in situ steady-state permeability test to determine the air permeability of covercrete. 6th International Conference on Durability of Concrete Structures, ICDCS 2018. Whittles Publishing Limited, 2018. pp. 525-531 (6th International Conference on Durability of Concrete Structures, ICDCS 2018).

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title = "Design of an in situ steady-state permeability test to determine the air permeability of covercrete",

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.",

keywords = "Covercrete, Flow net, In situ air permeability test, Steady-state state",

author = "K. Yang and Basheer, {P. A.M.} and Long, {A. E.} and S. Nanukuttan and C. Yang and Y. Wang and S. Mu",

year = "2018",

language = "English",

isbn = "1849953945",

series = "6th International Conference on Durability of Concrete Structures, ICDCS 2018",

publisher = "Whittles Publishing Limited",

pages = "525--531",

booktitle = "6th International Conference on Durability of Concrete Structures, ICDCS 2018",

}

Yang, K, Basheer, PAM, Long, AE, Nanukuttan, S, Yang, C, Wang, Y & Mu, S 2018, Design of an in situ steady-state permeability test to determine the air permeability of covercrete. in 6th International Conference on Durability of Concrete Structures, ICDCS 2018. 6th International Conference on Durability of Concrete Structures, ICDCS 2018, Whittles Publishing Limited, pp. 525-531.

Design of an in situ steady-state permeability test to determine the air permeability of covercrete. / Yang, K.; Basheer, P. A.M.; Long, A. E.; Nanukuttan, S.; Yang, C.; Wang, Y.; Mu, S.

6th International Conference on Durability of Concrete Structures, ICDCS 2018. Whittles Publishing Limited, 2018. p. 525-531 (6th International Conference on Durability of Concrete Structures, ICDCS 2018).

Research output: Chapter in Book/Report/Conference proceeding › Chapter

TY - CHAP

T1 - Design of an in situ steady-state permeability test to determine the air permeability of covercrete

AU - Yang, K.

AU - Basheer, P. A.M.

AU - Long, A. E.

AU - Nanukuttan, S.

AU - Yang, C.

AU - Wang, Y.

AU - Mu, S.

PY - 2018

Y1 - 2018

N2 - 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.

AB - 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.

KW - Covercrete

KW - Flow net

KW - In situ air permeability test

KW - Steady-state state

UR - https://www.mendeley.com/catalogue/68642409-e184-3264-9918-2e01ff7f0a38/

M3 - Chapter

SN - 1849953945

T3 - 6th International Conference on Durability of Concrete Structures, ICDCS 2018

SP - 525

EP - 531

BT - 6th International Conference on Durability of Concrete Structures, ICDCS 2018

PB - Whittles Publishing Limited

ER -

Yang K, Basheer PAM, Long AE, Nanukuttan S, Yang C, Wang Y et al. Design of an in situ steady-state permeability test to determine the air permeability of covercrete. In 6th International Conference on Durability of Concrete Structures, ICDCS 2018. Whittles Publishing Limited. 2018. p. 525-531. (6th International Conference on Durability of Concrete Structures, ICDCS 2018).