International Concrete Abstracts Portal

Title: Comparison of Test Methods and Effect of Adhesive Coverage on Sustainability of Reinforced Concrete Structures Strengthened with Externally Bonded CFRP Materials

Author(s): Jennifer Eisenhauer Tanner, David Mukai, Jiangang Deng, and Charles W. Dolan

Publication: Special Publication

Volume: 322

Issue:

Appears on pages(s): 8.1-8.12

Keywords: CFRP, repair, strength, sustainability, durability, accelerated ageing

Date: 6/18/2018

Abstract:
Sustainability of CFRP materials is evaluated based on their long-term capacities that can be decreased by environmental exposure. Researchers regularly accelerate this process by various forms of hygrothermal conditioning. Results of both flexural and tension tests are presented. A comparison of flexural and direct tension test methods is proposed and compared to those obtained by other investigators. In addition, a simple predictive model is introduced. Accelerated ageing tests indicate that the sustainability of carbon fiber reinforced polymer (CFRP) repair systems is impacted by the coverage rate of adhesives. Test results indicate no change in strength for specimens with 91 to 233 percent of the manufacturer’s recommended adhesive application while accelerated ageing tests show a markedly lower strength for specimens with less than the manufacturer’s recommended coverage.