Title:
Environmental Effects on the Mechanical Properties of E-Glass FRP Rebars
Author(s):
Fares E. Tannous and Hamid Saadatmanesh
Publication:
Materials Journal
Volume:
95
Issue:
2
Appears on pages(s):
87-100
Keywords:
accelerated testing; chemical resistance; diffusivity; durability;
glass fiber reinforced plastic (GFRP); matrix; moisture content; rebar; strain;
stress; tensile strength;
DOI:
10.14359/354
Date:
3/1/1998
Abstract:
Due to their unique properties, fiber reinforced plastics (FRPs) are becoming increasingly popular among researchers and engineers in the construction industry. FRP rebars in particular present an attractive alternative to steel rebars in reinforced concrete. Among the features of this type of rebars are their high strength to weight ratio and resistance to aggressive environmental conditions. This paper presents the results of a study on the durability of E-glass FRP rebars. A total of 160 rebar samples were placed in corrosive chemical solutions that simulated exposure in the field. Tests were performed at temperatures of 25 C and 60 C. Test variables included one type of fiber (E-glass), two matrix materials (polyester and vinylester), seven chemical solutions, and ultraviolet radiation. Rebar specimens were constructed from E-glass fibers embedded in polyester or vinylester resin matrix. Rebar sizes selected were 10 mm and 19.5 mm in diameter. Changes in weight and physical appearance were recorded over a one-year period. Ten beam samples reinforced with two 10-mm E-glass/polyester and vinylester FRP rebars were subjected to accelerated exposure to deicing salt solutions. They were tested in flexure to failure after 1-year and 2-year periods, and the load versus mid-span deflection relationships were recorded.