Concrete chloride ion migration coefficient load testing device under bending stress, and testing method thereof

Abstract

The invention discloses a concrete chloride ion migration coefficient load testing device under a bending stress, and a testing method thereof. According to the invention, an elastic connecting piece in a compression state is adopted to apply a continuous bending stress to a concrete test piece and the concrete test piece loaded with the continuous bending stress is subjected to electric acceleration chloride ion migration test to calculate to obtain the chloride ion migration coefficient of the concrete test piece in above state. So, the device of the invention solves problems that the practical loading state of the concrete in service cannot be stimulated and the concrete migration coefficient under continuous bending load conditions cannot be determined because routine concrete chloride ion migration coefficient testing devices cannot load the test piece; and the resilience of the elastic connecting piece is utilized to apply continuous stable bending force to the concrete test piece, so the pressure stress reduction caused by creeping of the concrete test piece during tension screw loading is avoided, thereby influences of the continuous bending load condition to the concrete chloride ion permeability can be researched, the chloride ion penetration resistance of concrete under a loaded condition can be evaluated, and research accomplishments can provide bases for concrete structure designing, reinforcing and service life evaluating if the research accomplishments are extended and applied to practical engineering.

Description

technical field [0001] The invention relates to a test device and method for measuring the chloride ion migration coefficient of concrete, in particular to a rapid test device and method for the chloride ion migration coefficient of concrete under continuous bending load conditions. Background technique [0002] The intrusion of chloride ions is one of the main reasons for the corrosion of steel bars in reinforced concrete structures, so the chloride ion permeability of concrete is an important indicator of the durability of reinforced concrete. At present, many countries use the electric flux method and the rapid chloride ion transfer coefficient method (RCM method) to evaluate the ability of concrete to resist chloride ion penetration. The electric flux method is to apply a DC voltage of 60 V at both ends of a Φ95×50 mm concrete specimen, and to qualitatively classify the chloride ion permeability level of concrete by detecting the electric flux flowing within 6 hours; Th...

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Problems solved by technology

[0003] The present invention aims at the problem that the test device for the rapid chloride ion transfer coefficient of conventional concrete cannot apply a bending load to the specimen, and provides a loading and testing device for testing the rapid chloride ion transfer coefficient of concrete under the condition of continuous bending load

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