Auxiliary device for axial tensile test of concrete core sample

Abstract

An auxiliary device for an axial tensile test of a concrete core sample particularly relates to the technical field of construction engineering concrete quality detection, and comprises a bonding plate, a pulling plate, a screw rod and a ball head pull rod, a circular groove slightly larger than the diameter of a concrete core sample is formed in one side of the bonding plate, screw holes are formed in the other side of the bonding plate, and the positions of the screw holes correspond to those of the circular holes in the pulling plate one to one; the bonding plate and the pulling plate can be fixedly connected by screwing the screws into the screw holes; a center hole and a spherical clamping groove are formed in the center of the pull plate, the ball head pull rod is cylindrical, one end of the ball head pull rod is machined into a sphere with the diameter larger than that of the ball head pull rod, the diameter of the ball head pull rod is smaller than the inner diameter of the center hole, and an angle gap of + / -10 degrees is formed between the ball head pull rod and the center hole. The device disclosed by the invention has the beneficial effects that the device can be used for quickly mounting, leveling and stretching the concrete core sample axial tensile test piece, is simple, convenient and quick to mount and can be repeatedly used, so that the concrete core sample axial tensile test process is quick, accurate, efficient and energy-saving.

Description

technical field [0001] The invention relates to the technical field of concrete quality detection in construction projects, in particular to an auxiliary device for axial tensile testing of concrete core samples. Background technique [0002] The "Hydraulic Concrete Test Regulations" (DL / T5150-2017) specifies that concrete core samples can be carried out in accordance with section 4.5 of the specification. The schematic diagram of the resin adhesive bonded drawing plate does not give the method of how to install it on the tensile testing machine, and how to ensure that the axial force of the core sample is maintained during the stretching process; there is no ready-made device available on the market Use, left difficult problem to experimenter's operation. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the present invention provides an auxiliary device for the axial tensile test of concrete core samples, which provides an auxiliary device ...

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Problems solved by technology

[0002] The "Hydraulic Concrete Test Regulations" (DL / T5150-2017) specifies that concrete core samples can be carried out in accordance with section 4.5 of the specification. The schematic diagram of the resin adhesive bonded drawing plate does not give the method of how to install it on the tensile testing machine, and how to ensure that the axial force of the core sample is maintained during the stretching process; there is no ready-made device available on the market Use, leaving a difficult problem for the testers to operate

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