Evaluation Effects of the Short- and Long-Term Freeze-Thaw Exposure on the Axial Behavior of Concrete-Filled Glass Fiber-Reinforced-Polymer Tubes

Table 3

Test results of unconfined concrete cylinders.

Plain concrete	Room temperature	F/T in; Salt water
Average strength𝑓^′𝑐 (MPa)
100 F/T cycles	33.2	24.1
300 F/T cycles	33.2	25.9