ASTM D7705/D7705M-12 (R2019) PDF Download

ASTM D7705/D7705M-12 (R2019) is a test method that evaluates the alkali resistance of Fiber Reinforced Polymer (FRP) matrix composite bars used as reinforcing bars in concrete construction. The purpose of this standard is to determine alkaline resistance data for material specifications, research and development, quality assurance, and structural design and analysis.

The test method consists of three procedures conducted at a temperature of 60 ºC (140 ºF). Procedures A and B are accelerated tests, where an alkaline aqueous environment is substituted for concrete porewater. Procedure A is used for rapid screening of FRP bars for alkali resistance. Procedure B is used to characterize the alkali resistance of FRP bars under sustained mechanical loading in a standard aqueous alkaline environment that represents concrete porewater.

Procedure C is used to characterize the alkali resistance of FRP bars under sustained mechanical loading in Portland cement concrete. The primary test results obtained from these procedures are the mass change and tensile capacity retention of the test specimen. These results are important factors to consider when using FRP reinforcing bars.

In addition to testing FRP bars, this standard is also applicable for testing linear segments of FRP reinforcements cut from two- or three-dimensional reinforcing grids.