The relationship between strength and depth of water penetration in concrete by using pull-off and cylindrical chamber tests and developing a new theory

Articles in Press

Document Type : Research Article

Authors

1 Professor, Imam Khomeini International university, Qazvin, Iran.

2 Ph.D, Imam Khomeini International University, Qazvin, Iran.

3 Civil Engineering, Engineering Faculty, Imam Khomeini international University. (IKIU) Quzvin, Iran

Abstract

The depth of water penetration in concrete is used to measure the permeability of concrete. In the valid international standards, to do this, first water under pressure enters the concrete, and then by breaking the concrete sample, the depth of water penetration into the concrete is measured. Meanwhile, if there is a need to evaluate the durability of a concrete structure or a concrete water source on site, there is no accurate on-site test to do this. Therefore, in this article, the depth of water penetration in concrete has been measured by using the in-situ and modern cylindrical chamber test. Then, using the structural characteristics of the microscopic pores of concrete, which is obtained by mercury test, a new theoretical model has been presented, which can be used to measure the water penetration depth in concrete with high accuracy. . While comparing the penetration depth obtained from the cylindrical chamber test and the new theoretical model, the surface resistance of concrete has been determined using the surface pull test. The obtained results show an inverse relationship between strength and water penetration depth in concrete. It was also found that the cylindrical chamber test has the ability to measure the depth of water penetration in concrete without breaking the sample and with a high confidence of 93%. The extracted new equations also showed very high accuracy to evaluate the depth of water penetration into concrete.

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Amirkabir Journal of Civil Engineering

Articles in Press, Accepted Manuscript
Available Online from 05 June 2025

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