Standard Test Method for Evaluation of Bond Properties of FRP Composite Applied to Concrete Substrate using Single-Lap Shear Test

Importancia y uso:

5.1 This test method is intended for use in a laboratory setting.

5.2 This test method is used to evaluate the plateau force P_pl that an FRP composite can bear before complete debonding from a concrete prism.

5.3 The evaluation of the plateau force is intended to be made under consistent environmental conditioning and the tests conducted in ambient laboratory or otherwise consistent environmental conditions.

5.4 This test can be used to determine the effective bond length l_eff of the FRP composite if different bonded lengths are tested with constant bonded width. The effective bond length l_eff is defined as the minimum bonded length necessary to achieve the bond capacity P_pl for the width of FRP tested.

5.5 This test can be used to determine the variation of the bond capacity with the bonded width b_f if different bonded widths are tested while the bonded length is constant and greater than the effective bond length l_eff.

5.6 This test is used to obtain the plot of the applied force versus loaded end (or global) slip of the composite with respect to the substrate. The loaded end slip is the average of two linear variable differential transformer (LVDT) readings, as described in 7.6. The plot obtained is used to determine the bond properties of the system.

5.7 This test method can also serve as a means for uniformly preparing and testing standard specimens suitable for being subject to environmental conditioning and subsequently used to evaluate FRP-bonded-to-concrete system performance, and evaluating and reporting the results. The comparison of results from this test method conducted on identical specimens subject to different environmental conditioning protocols can be used to evaluate the effects of environmental exposure on the bond performance of FRP systems.

Subcomité:

D30.10

Referida por:

D4762-23

Volúmen:

15.03

Número ICS:

59.100.01 (Materials for the reinforcement of composites in general)

Palabras clave:

bond; composite materials; pultruded (shop-fabricated) FRP composite; single-lap shear test; wet lay-up FRP composite;