Testing device and method for directly testing adhesive property between early-age concrete and reinforcing steel bars

The invention discloses a testing device and method for directly testing the adhesive property between early-age concrete and reinforcing steel bars. The testing device comprises an outer frame and a loading device arranged in the outer frame, wherein the upper end of the outer frame is connected with a test piece template for placing a test piece through a planar hinge, and the loading device comprises a hydraulic jack, a hollow load sensor, a ball hinge, a displacement sensor, a hydraulic oil pump and a resistance strain gauge. After the concrete is poured, a mould is not dismounted and is directly tested. Before testing, the displacement sensor is arranged at the top end of the test piece; during testing, the hydraulic oil pump drives the hydraulic jack to generate a pull force to the reinforced steel bars, so that relative slippage is formed among the reinforced concrete and the binding power is generated, and the adhesive property between the early-age concrete and the reinforcing steel bars is tested. The testing device, provided by the invention, has the advantages of simple structure, convenience for assembly and disassembly, and a small number of required materials and instruments, and is suitable for carrying out scientific research and testing the adhesive property between the early-age concrete and the reinforcing steel bars in a construction site.