Early crack resistance testing device for concrete

The utility model discloses a concrete early-stage crack resistance testing device which comprises an experimental device shell and positioning structures, supporting legs are integrally formed at the bottom of the experimental device shell, a control panel is integrally formed right in front of the lower portion of the experimental device shell, and the positioning structures are connected to the left side and the right side of the experimental device shell in an inserted mode. The positioning structure comprises a fixing frame, the side, facing the experimental device shell, of the fixing frame is fixed to the experimental device shell through bolts, a fixing shaft is fixed to the top of the fixing frame through bolts, an electric telescopic rod is welded to the side, facing the experimental device shell, of the fixing shaft, and a movable shaft is inserted into an elastic shaft. The concrete early-stage crack resistance testing device has the advantages that positioning structures are inserted into the ext