Loading equipment for corrosion test of concrete sample with stress action

Abstract

The present invention discloses a loading device for concrete samples in corrosion test under the action of stress, comprising a machine frame, an upper beam with a scale, a lower beam, loading weights, a force transmission bar, an upper stress application roll and a lower stress application roll, wherein one end of the upper beam is hinged with one side of the machine frame; the loading weights are hung on the other end of the upper beam; the middle of the upper beam is provided with an upper slider sliding along the longitudinal direction of the upper beam; a concrete sample is placed between the upper stress application roll and the lower stress application roll; the lower part of the force transmission bar transmits force to the concrete sample through the upper stress application roll; the lower stress application roll is supported by a base of the machine frame; the lower beam is positioned under the upper beam; one end of the lower beam is in hinge joint with the other side of the machine frame; the upper slider is pressed on the upper part of the lower beam; the lower beam is pressed on the upper part of the force transmission bar. The loading device is accurate to load, stable in load, small in entire volume and convenient for simulating constant continuous stress conditions of actual structures in test boxes.

Description

[technical field] [0001] The invention relates to concrete performance testing equipment, in particular to a loading equipment for corrosion testing of concrete samples under stress. [Background technique] [0002] In recent years, stress corrosion has become a new hotspot in the research of concrete materials. It mainly studies the influence of load on chemical corrosion such as sulfate corrosion, chloride ion penetration, and carbonation of concrete and reinforced concrete. Studies have shown that the existence of load is a factor that cannot be ignored in concrete corrosion, and the load must be introduced to study the corrosion degradation process of concrete under chemical action. [0003] Scholars at home and abroad have done a lot of research in this area. When doing this kind of test, the chemical corrosion environment and load must be provided at the same time. The chemical corrosion environment can be provided by environmental corrosion test chambers, such as carb...

AI Technical Summary

Problems solved by technology

Therefore, a key question that exists is: how to simulate the constant and continuous stress in the actual structure in the test chamber

The advantages of this kind of spring loading are simple structure, small size, and three test pieces can be loaded at the same time, which saves space; but its disadvantage is that the loading is not accurate enough, and there are problems of spring stress relaxation and load attenuation.

Images