Pressure application test device and test method for reinforced concrete sample in salt-spray environment

Abstract

The invention belongs to the field of scientific experiments of materials and particularly relates to a pressure application test device and test method for a reinforced concrete sample in a salt-spray environment. The test device comprises a bearing platform, a salt-spray environment cabinet, a jack and a pressure sensor, wherein a bearing reaction frame and a loaded reaction frame are arranged at two ends of the bearing platform respectively, and the salt-spray environment cabinet is arranged in the middle of the bearing platform; the jack is fixed on the bearing reaction frame, and the pressure sensor is fixed on the loaded reaction frame; the reinforced concrete sample is placed in the salt-spray environment cabinet, the salt-spray environment cabinet provides the reinforced concrete sample with a salt-spray environment required by an experiment, the jack loads the reinforced concrete sample, and the pressure sensor measures the load value borne by reinforced concrete. The test device can apply a pressure load to the reinforced concrete sample in the salt-spray environment, the load range is wide, the load value can be adjusted freely in an experiment process, little salt spray leaks in load applying and maintaining processes, test data are accurate, the data can be read at any time, and the service life is long.

Description

technical field [0001] The invention belongs to the field of material science experiments, and in particular relates to a pressure 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 i...

AI Technical Summary

Problems solved by technology

[0003] At present, when the laboratory conducts multi-coupling experiments of chloride salt and pressure 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 existing test device also uses post-tensioning prestressing method to apply axial compressive load to the reinforced concrete specimen, because under long-term loading, the test device will cause the test device to suffer from the creep effect of the concrete or the stress relaxation of the steel bar. It is difficult to maintain the original load level, and this method cannot read the load value, which brings inconvenience to the experimenters

The invention patent with application publication number CN102721637A discloses a multifunctional experimental system and method for concrete durability under continuous pressure. The invention can monitor and adjust the load in real time and avoid experimental errors caused by the stress relaxation of steel bars. Salt solution erosion, the multi-coupling test of salt spray and load cannot be carried out by using this invention

Images