Title

Effect Of Environmental Conditioning On Mechanical Properties Of Polyurethane Carbon Composites

Abstract

FRP materials are often used for externally strengthening reinforced concrete infrastructure. Typical strengthening systems utilize externally bonded laminates with carbon reinforcing fibers and epoxy matrices and adhesives. Yet, research has shown that polyurethane matrix composites and adhesives are also a viable option. The use of CFRP for infrastructure repair necessitates an understanding of the behavior of laminates when subjected to both environmental and mechanical loading during the service life of the repair. This paper presents how continuous exposure to various environmental conditions affects the tensile properties, bond behavior of CFRP to concrete, and degradation at the fiber/matrix level when the laminate utilizes a polyurethane matrix/adhesive. Tensile test coupons and small-scale unreinforced concrete beam specimens strengthened with CFRP were exposed to 5 different conditioning environments: dry heat, ambient outdoor, seawater, concrete leachate, and humidity. Flexural and tensile tests were completed after 30, 60, 180, and 360 days of exposure. Results depict degradation of tensile properties and bond strength over time. Degradation at the fiber/matrix level was evaluated with scanning electron microscopy.

Publication Date

8-30-2011

Publication Title

International SAMPE Technical Conference

Number of Pages

-

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

Socpus ID

80052057278 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/80052057278

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