Title:
Method for Screening Durability andConstituent Materials in FRP Bars
Author(s):
D. Gremel, N. Galati, and J. Stull
Publication:
Symposium Paper
Volume:
230
Issue:
Appears on pages(s):
153-164
Keywords:
alkaline exposure of FRP bars; bending stress; constituentmaterials; durability; GFRP bar
DOI:
10.14359/14830
Date:
10/1/2005
Abstract:
A method for screening the durability of FRP bars under bending stress andimmersion in high pH solution at elevated temperature is described. Discussion of theneed for such a test, process variables affecting durability, determination of theappropriate bending radius and a description of the test method are shown. Testresults from a series of eight production runs varying only one of the processes relatedvariables, glass fiber supplier, are shown. Fiber sizing chemistry for the fiber/resin/production system is key to better durability of GFRP rebar. The bending stressdurability test method helps reveal FRP bar system performance for differentconstituent materials and offers a more practical method for evaluating alkalinedurability of GFRP bars. The method is intended as an indicator of durabilityperformance and not a definitive evaluation.