Axial tensile test device and method for test piece in constant-temperature erosion environment

Abstract

The invention discloses an axial tensile test device and method for a test piece in a constant-temperature erosion environment. The axial tensile test device for the test piece in the constant-temperature erosion environment comprises a constant-temperature mechanism, an erosion mechanism, a mounting mechanism, a stress loading mechanism and a stress detection mechanism, wherein a constant-temperature cavity is formed in the constant-temperature mechanism, the temperature of the constant-temperature cavity can be set to be a preset value, an erosion groove is formed in the erosion mechanism, an erosion liquid is arranged in the erosion groove, the mounting mechanism is used for fixedly mounting a test piece and is arranged in the erosion groove, the liquid level of the erosion liquid is higher than the top wall of the test piece, the stress loading mechanism is arranged on the mounting mechanism, two ends of the test piece are respectively connected with the mounting mechanism and thestress loading mechanism, the stress loading mechanism can apply a preset axial tensile load to the test piece, and the stress detection mechanism is arranged on the test piece and can detect stress at different positions of the test piece. According to the invention, the tensile test can be conveniently performed on the test piece under various constant-temperature conditions, erosion conditionsand load conditions.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to an axial tensile test device and a test method for a test piece in a constant temperature erosion environment. Background technique [0002] The actual concrete structure is often damaged due to the load and environmental factors (temperature), which leads to changes in the microstructure inside the concrete, which in turn affects the durability and mechanical properties of the concrete. The temperature in the natural environment has obvious time-varying properties, but the temperature in concrete always changes with the change of the ambient temperature. In a variable temperature environment, the concrete structure not only bears the load, but also is affected by the temperature stress. When the tensile stress generated by the joint action of the stress field and the temperature field exceeds the tensile strength of the concrete, cracks will occur, and the appearance o...

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Problems solved by technology

At the same time, it also reduces the protective effect of concrete on steel bars, accelerates the corrosion rate of steel bars in concrete, and shortens the service life of concrete structures.

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