Concrete performance testing device under combined action of constant tensile load and erosion medium

Abstract

The invention discloses a concrete performance testing device under the combined action of a constant tensile load and an erosion medium, relates to the field of concrete durability testing and solves the problem that an existing testing device cannot implement concrete performance testing under the combined action of a constant stress and medium erosion. The testing device comprises a bottom plate, a connecting base, a first puller, a middle pressure plate, an upper pressure plate, a pull rod, a dish-shaped spring and a medium circulating device, wherein the bottom plate is fixedly connected with an upright; the connecting base is fixed in the middle of the bottom plate; the first puller is hinged to the connecting base and can rotate around the connecting base; the middle pressure plate passes through the upright and is fixed at a limiting point of the upright; the upper pressure plate passes through the upright; the pull rod passes through through holes in the middle pressure plate and the upper pressure plate; one end of the pull rod is connected with a spherical joint; a second puller is connected to the spherical joint; a nut is screwed at the other end of the pull rod; the dish-shaped spring sleeves the pull rod and is positioned between the middle pressure plate and the upper pressure plate; one end of a concrete test piece is connected to the first puller and the other end of the concrete test piece is connected to the second puller.

Description

technical field [0001] The invention belongs to the field of concrete durability testing, and in particular relates to a concrete performance testing device under the joint action of continuous constant axial tensile stress and erosive medium to study the behavior of corrosive gases or ions in concrete under different levels of constant tensile stress Transmission performance and mechanism. Background technique [0002] In the prior art concrete durability test device under the joint action of tensile stress and erosive medium, the device uses the reaction force of the compression spring to apply tensile stress to the concrete clamped between the tensile chucks, and the whole device is placed in chemical corrosion The environmental conditions of medium erosion are simulated in the box, and different water pressures are applied to the concrete specimens through the impermeability meter, but the contact between the tensile chuck of the device and the concrete specimen will dir...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the embodiment of the present invention provides a concrete performance test device under the joint action of continuous constant axial tensile stress and erosive medium. The main purpose is to solve the problem of tensile stress eccentricity, stress relaxation, and The problem that the performance test of concrete under the coupled action of stress and medium erosion cannot be realized

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