Tensile load applying device for concrete chloride ion permeability test and test method

Abstract

The invention provides a tensile load applying device for a concrete chloride ion permeability coulometric-process test, and a test method. In the tensile load applying device, four threaded holes are formed at the four corners of a steel bottom plate, four parallel screws are fastened into the threaded holes, and compression springs, and a tensile steel plate, a pressing steel plate and a top plate, which are parallel with the steel bottom plate, are sleeved on the screws; four threaded holes are formed in the middle of the four edges of the steel bottom plate, four through holes are formed in the middle of the four edges of the tensile steel plate, and tensile screws are inserted into the through holes; and the tensile screws above the tensile plate are sleeved with through hole ball seats and fixed nuts, and the lower ends of the tensile screws are connected with a tensile force measurement device. The invention also provides a concrete chloride ion permeability coulometric-process test method using the applying device. The applying device provided by the invention solves the problem that the conventional concrete chloride ion permeability test device is incapable of applying tensile load onto a tested piece, simulating the actual load state of in-service concrete member and measuring the concrete chloride ion permeability under a tensile load condition.

Description

technical field [0001] The invention relates to a test device and method for measuring the chloride ion permeability of concrete, in particular to a loading device and a test method for the electric quantity test of the chloride ion permeability of concrete under the condition of continuous tensile load. Background technique [0002] For reinforced concrete structures such as seaport terminals, underground engineering, water conservancy and hydropower engineering structures, the water permeability and chloride ion permeability of concrete are one of the most important performance indicators. Chloride ion permeability is not only an important indicator of the ability of concrete to resist chloride ion erosion and protect steel bars from erosion in reinforced concrete, but also characterizes the water permeability of concrete to a certain extent. The current methods for measuring the chloride ion permeability of concrete mainly include the electric quantity method and the rapi...

AI Technical Summary

Problems solved by technology

At present, the standard (ASTM C1202) developed by the American Society for Standards and Testing of Materials (ASTM C1202) adopted by many countries to evaluate the ability of concrete to resist penetration of chloride ions is to apply a DC voltage of 60V to both ends of a Φ95×50 mm concrete sample. To evaluate the permeability of concrete by detecting the amount of electricity flowing within 6 hours, the devices and methods used have not considered and cannot implement various loads on the test piece at the same time

Patent CN 101699267 A in the announcement (application number 200910184937.8) discloses a concrete chloride ion permeability coulometric test loading device and testing method; patent CN 101718671 A in the announcement (application number 200910212680.2) discloses a concrete chloride ion permeability test The loading device and testing method; patent CN 101074912 A (application number 200710023139.8) discloses the testing device and testing method for the permeability performance of hydraulic concrete under load; The test method of chloride ion permeability is still blank

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