Title: Long-term permeability reduction in concrete with external pre-saturated CFRP laminate

Authors: Nur Yazdani; Ramya Anandhan; Eyosias Beneberu

Addresses: Department of Civil Engineering, The University of Texas at Arlington, Arlington, Texas 76019, USA ' Department of Civil Engineering, The University of Texas at Arlington, Arlington, Texas 76019, USA ' Bridgefarmer & Associates, Inc., 2350 Valley View Lane, Dallas, TX 75234, USA

Abstract: Several studies have investigated the use of regular carbon fibre reinforced polymer (R-CFRP) wraps in reducing chloride ingress and water permeability. However, no similar study has been done to date on pre-saturated CFRP (PS-CFRP). Therefore, the main objective of this research was to investigate the long-term effectiveness of PS-CFRP wraps in preventing corrosion of reinforced concrete specimens by reducing chloride ingress and water permeability. The study was conducted on 16 specimens made of high-strength concrete and 16 specimens from normal-strength concrete. Among these, eight served as control specimens, 12 were wrapped with single-layer R-CFRP and the remaining 12 were wrapped with single-layer PS-CFRP. The amount of chloride that penetrates the specimens was determined by the saline ponding test per ASTM C1152, and the water permeability test was conducted per ASTM C1585. The results showed that PS-CFRP laminate wrapped around high strength and normal strength concrete provided a stronger barrier against chloride ingress and water permeability than R-CFRP wrapped normal and high strength concrete specimens.

Keywords: CFRP wrapping; concrete durability; chloride content; corrosion; water permeability; diffusion coefficient; concrete permeability.

DOI: 10.1504/IJSMSS.2024.143437

International Journal of Sustainable Materials and Structural Systems, 2024 Vol.6 No.2, pp.130 - 149

Received: 11 Oct 2022
Accepted: 11 May 2023
Published online: 20 Dec 2024 *

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