Abstract
Reinforced polymer impregnated concrete beams are manufactured by the processes of curing, drying, evacuation, impregnation, and polymerization. The initial stress of concrete in the reinforced polymer impregnated concrete beams can generally be tensile stress. Therefore, it is important to grasp the initial stress in accurately analysing the flexural behavior of reinforced polymer impregnated concrete beams. The strain generated in each manufacturing process is studied experimentally as to the reinforced polymer impregnated concrete beams using expansive concrete and steel fiber. Based on the experimental results, the methods for estimating the initial stress of the beams are proposed.
