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Concrete confinement with steel-reinforced grout jackets

Thermou, Georgia E.; Katakalos, Konstantinos; Manos, George

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Georgia E. Thermou

Konstantinos Katakalos

George Manos



The potential of steel fiber reinforced jackets combined with inorganic matrix (cementitious grout matrix) as an alternative strengthening system to fiber-reinforced polymer (FRP) jackets was investigated experimentally in the current study. For this purpose, the novel jacketing device was applied on cylindrical specimens subjected to monotonic concentric uniaxial compression load. Parameters of investigation were the type of the steel fiber reinforced fabric, its density, the overlap length, and the concrete compressive strength. The 3X2 and 12X types of steel fabric were used with three alternative densities, characterized as high, medium and low density. Experimental evidence has shown that a single layer of SRG jacket has increased substantially both axial strength and deformation capacity. From the response of the SRG confined cylinders the degree of penetration of the grout matrix through the fabric as well as the overlap length are considered rather critical parameters for the effectiveness of the method. The experimental data were used for the derivation of a simple empirical confinement model which correlated well with other well-established FRP confinement models. The knowledge gained from this experimental study renders SRG jacketing a remarkably promising retrofit solution for reinforced concrete confinement.


Thermou, G. E., Katakalos, K., & Manos, G. (2015). Concrete confinement with steel-reinforced grout jackets. Materials and Structures, 48(5), 1355-1376.

Journal Article Type Article
Acceptance Date Dec 11, 2013
Online Publication Date Jan 5, 2014
Publication Date 2015-05
Deposit Date Dec 3, 2018
Publicly Available Date Sep 10, 2019
Journal Materials and Structures
Print ISSN 1359-5997
Electronic ISSN 1871-6873
Publisher Springer Verlag
Peer Reviewed Peer Reviewed
Volume 48
Issue 5
Pages 1355-1376
Public URL
Publisher URL
Additional Information This is a post-peer-review, pre-copyedit version of an article published in Materials and Structures. The final authenticated version is available online at:


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