Bend test apparatus for reinforced concrete test piece in salt-spray environment and test method

Abstract

The invention belongs to the field of material scientific experiments, and concretely relates to a bend test apparatus for a reinforced concrete test piece in salt-spray environment. The test apparatus comprises a bearing platform, a salt-spray environment box, a jack and a pressure sensor; two ends of the bearing platform are respectively provided with a support reaction frame and a bearing reaction frame, and the middle part of the bearing platform is provided with the salt-spray environment box; the jack is fixedly disposed on the support reaction frame, and the pressure sensor is fixedly disposed on the bearing reaction frame; the reinforced concrete test piece is put in the salt-spray environment box, and the salt-spray environment box is used to provide the salt-spray environment demanded by the test on the reinforced concrete test piece, the jack applies bending load on the reinforced concrete test piece, and the pressure sensor measures the load value born by the reinforced concrete test piece. The apparatus is capable of applying the bending load on the reinforced concrete test piece in the salt-spray environment, and is large in loading measuring range. The load value during experiment can be freely adjusted, salt-spray leakage is small in the process of applying and maintaining the load, measure data is precise, data can be read momentarily, and the service life of the apparatus is long.

Description

technical field [0001] The invention belongs to the field of material science experiments, and in particular relates to a bending test device and a test method for reinforced concrete specimens in a salt spray environment. Background technique [0002] Most coastal buildings use reinforced concrete structures. Chloride ions exist in the ocean atmosphere, which can cause corrosion of steel bars and damage reinforced concrete structures. For the research on the durability of reinforced concrete, the artificial climate environment experiment method is generally used to simulate the real environment in the laboratory. The researchers believe that the method of periodically spraying salt spray to the reinforced concrete specimens can better simulate the damage caused by the marine atmospheric environment to the reinforced concrete. Chloride salt corrosion, but academician Wu Zhongwei pointed out that the durability failure of reinforced concrete in the real natural environment is...

AI Technical Summary

Problems solved by technology

[0003] At present, when the laboratory conducts multi-coupling experiments of chloride salt and bending load, the method of applying counterweight to the reinforced concrete specimen in the salt spray environment is mostly used. However, the load level applied by this method is limited. For some components with high bearing capacity, It is difficult to achieve its normal load level in the service stage by this method

The invention patent of application publication number CN103674708A discloses an experimental loading device for concrete durability research under the coupling of multiple factors. The loading device cannot freely control the magnitude of the bending load, and spraying salt spray requires a closed environment. The loading experiment is carried out in the box, and the data cannot be read at any time

The invention patent of application publication number CN103743626A discloses a test device and test method for freeze-thaw durability of reinforced concrete beams. Although the test device can freely control the bending load, it is only suitable for the coupling experiment of freeze-thaw cycle and salt solution erosion. Salt spray has a strong corrosive effect on the metal in the loading component of the device, and the multi-coupling test of salt spray and load cannot be carried out with this experimental device

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