Tensile loading device for testing permeability of concrete chloride ions and application thereof

Abstract

The invention relates to a device for testing the permeability of concrete chloride ions and application thereof. A tensile loading device for testing the permeability of the concrete chloride ions by an electric quantity method is characterized in that: a screw rod between a steel bottom plate and a tensile steel plate is provided with a compression spring; a screw rod on the upper part of the tensile steel plate is sleeved with a tensile steel plate positioning bolt cap; a screw rod on the lower part of a compression steel plate is sleeved with a compression steel plate positioning bolt cap; screw rods on the upper part and lower part of a top plate are sleeved with a lower top plate fixing bolt cap and an upper top plate fixing bolt cap respectively; the middle points of four sides of the steel bottom plate are provided with threaded holes; the tensile steel plate is provided with a through hole which corresponds to the threaded holes; a tensile screw rod is arranged in the through hole; the tensile screw rod is sleeved with a ball seat which is provided with upper and lower through holes and a fixing bolt cap on the upper part of the tensile steel plate; and the lower end of the tensile screw rod is connected with a tensile dynamometer. The problem that the conventional device for testing the permeability of the concrete chloride ions cannot apply continuous tensile load to a tested piece is solved.

Description

technical field [0001] The invention relates to a test device for measuring the chloride ion permeability of concrete and its application, in particular to a loading device and a test method for measuring 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 rapid chloride ...

AI Technical Summary

Problems solved by technology

At present, the standard (ASTM C1202) formulated 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 60 V at both ends of a Φ95×50 mm concrete sample. The permeability of concrete is evaluated by detecting the amount of electricity flowing within 6 hours. The devices and methods used do not consider and cannot implement various loads on the test piece at the same time

Patent CN 101699267 A in the announcement (application number 200910212680.2) discloses a loading device and method for testing the chloride ion permeability of concrete under bending load; Concrete chloride ion permeability test loading device and test method by electrical method under load; patent 200720079338.3 and patent CN 101074912 A (application number 2007100213139.6) disclose the test loading device and test method of concrete water permeability under uniaxial compression load; no continuous Relevant reports on the loading device and test method of concrete chloride ion permeability coulometric method under tensile load, due to the constraints of conventional test devices, the test method of concrete chloride ion permeability under continuous tensile load is still blank

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