Short-Term Gradation Loading Creep Properties and Failure Characteristics of High-Strength Fly Ash Concrete for Underground Engineering

Figure 2

Electrohydraulic servocontrolled creep test system with the following components: (1) guide screw, (2) bearing plate, (3) strain gauge, (4) concrete, (5) pressure transducer, (6) oil pump system, (7) cooling tower, (8) electric machinery, (9) track, (10) strain collection device, (11) controller, (12) power device, (13) underground space, and (14) bearing plate.