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research article

Spalling of concrete cover induced by reinforcement

Moccia, Francesco  
•
Fernández Ruiz, Miguel  
•
Muttoni, Aurelio  
April 4, 2021
Engineering Structures

This paper investigates the phenomenon of cover spalling in reinforced concrete induced by bond or by the action of an inner pressure. This research is based on an experimental programme comprising a series of bond tests and a series of tests with inner-pressure on cylindrical openings. The inner-pressure test series (aimed at representing the conditions occurring for instance due to corrosion of reinforcement) was performed with hydraulic inflator devices embedded within concrete openings near to the free concrete surface. By means of detailed surface measurements performed with Digital Image Correlation, the mechanisms triggering spalling failures and the associated resistance are discussed and analysed thoroughly. This series investigates in addition a number of phenomena relevant to spalling failures, such as the influence of the casting position, group and size effects. The observed response, analysed by means of a mechanical analogy, is later used to investigate a series of structural tests performed on pull-out specimens. This analysis highlights the analogies and differences between the two types of tests (subjected to an imposed pressure or to bond stresses). On that basis, a comprehensive approach for treatment of bond-related cases failing by cover spalling is proposed, showing consistent agreement to the experimental evidence.

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Type
research article
DOI
10.1016/j.engstruct.2021.112188
Author(s)
Moccia, Francesco  
Fernández Ruiz, Miguel  
Muttoni, Aurelio  
Date Issued

2021-04-04

Published in
Engineering Structures
Volume

237

Article Number

112188

Subjects

Cover spalling

•

Bond

•

Radial pressure

•

Corrosion

•

Casting position effect

•

Size effect

•

Group effect

•

Concrete tensile strength

•

Pull-out tests

•

GIS_publi

Note

This is an Open Access article under the terms of the Creative Commons Attribution License

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
IBETON  
Available on Infoscience
April 6, 2021
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/176997
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