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Embedded-type sensor for detecting concrete chloride ion content and preparation method thereof

A technology of chloride ion content and sensor, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems that the chloride ion content of concrete cannot be detected in real time, the chloride ion concentration cannot be continuously detected, and the chemical reaction is irreversible, so as to reduce spillage and migration Loss, improve shrinkage cracking performance, improve the effect of detection accuracy

Inactive Publication Date: 2010-06-09
HARBIN INST OF TECH
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide an embedded sensor for detecting the chloride ion content of concrete and a preparation method thereof, so as to solve the problem that the reference electrode of the existing embedded sensor is arranged outside the concrete specimen and cannot detect the chloride ion content of concrete in real time, There are problems of large voltage drop, poor robustness, poor stability, and the embedded sensor produced by the existing embedded sensor preparation method cannot continuously detect the changing chloride ion concentration, the chemical reaction during detection is irreversible, and the detection result is inaccurate.

Method used

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  • Embedded-type sensor for detecting concrete chloride ion content and preparation method thereof
  • Embedded-type sensor for detecting concrete chloride ion content and preparation method thereof
  • Embedded-type sensor for detecting concrete chloride ion content and preparation method thereof

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specific Embodiment approach 1

[0026] Specific implementation mode one: as Figure 1~2As shown, the embedded sensor for detecting the chloride ion content of concrete in this embodiment includes a sensor cylinder 1, an annular silver wire 2, an input copper wire 3, an output copper wire 4, a micro-expansion fiber cement semi-permeable membrane layer 5, an alkaline Gel layer 6, manganese dioxide layer 7, metal barrel body 8 and insulating sealant layer 9, the lower part of the outer wall of the sensor cylinder 1 is provided with an annular groove 1-1 along the circumferential direction of the sensor cylinder 1, the The outer wall of the sensor cylinder 1 has an axial groove 1-2 along the height direction, and the annular groove 1-1 communicates with the axial groove 1-2, and the annular silver wire 2 is sleeved on the sensor cylinder In the annular groove 1-1 of 1, the lower part of the input copper wire 3 is located in the axial groove 1-2, and the lower end of the input copper wire 3 is fixed with the annu...

specific Embodiment approach 2

[0028] Specific implementation mode two: as figure 1 As shown, the length of the sensor cylinder 1 in this embodiment is 30-50 mm. In such a design, the sensor barrel 1 is designed to be small in size, which is convenient for embedding the sensor in concrete. Other components and connections are the same as those in the first embodiment.

specific Embodiment approach 3

[0029] Specific implementation mode three: as Figure 1~2 As shown, the material of the sensor cylinder 1 in this embodiment is made of hard PVC plastic. With such a design, the hard PVC plastic has good insulation, is easy to process, and is waterproof and moisture-proof. Other compositions and connections are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses an embedded-type sensor for detecting concrete chloride ion content and a preparation method thereof, relating to a sensor and a preparation method. The invention solves the problems that the existing sensor can not detect concrete chloride ion content in real time and has larger voltage drop, poor sturdiness and poor stability, and the sensor manufactured with the existing method can not continuously detect changed chloride ion concentration and has inaccurate detection result. A micro-expansion fiber cement semipermeable membrane layer, an alkaline gel layer and a manganese dioxide layer are successively arranged in a sensor barrel from bottom to top. The method is as follows: successively arranging the manufactured micro-expansion fiber cement semipermeable membrane layer, the alkaline gel layer and the manganese dioxide layer from bottom to top in the sensor barrel; and dipping the lower part of the manufactured sensor into simulative concrete pore fluid. The sensor of the invention can detect concrete chloride ion content in real time, has favourable sturdiness and favourable long-term stability; the sensor manufactured by the invention can continuously detect changed chloride ion concentration and has accurate detection result.

Description

technical field [0001] The invention relates to a sensor for detecting the chloride ion content of concrete and a preparation method thereof. Background technique [0002] In the marine environment and deicing salt environment, the corrosion of steel bars caused by the intrusion of chloride salts is the main reason for the durability damage of concrete structures. Therefore, timely and accurate grasp of the distribution of chloride ions in concrete is very important for evaluating and controlling the degree of corrosion and the degree of corrosion of actual concrete structures. Service performance is of great significance. [0003] At present, the commonly used methods mainly include two categories: [0004] 1. For new projects, optimize the concrete mix ratio and the thickness of the protective layer through a large number of tests, and make predictions based on the test results of the chloride ion penetration resistance of laboratory concrete and the actual structural wor...

Claims

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Application Information

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IPC IPC(8): G01N27/406
Inventor 高小建杨英姿张剑邓宏卫
Owner HARBIN INST OF TECH
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