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Cement-based mortar sensing electrode internally doped with nano-conductive material, as well as preparation method and application thereof

A nano-conducting and sensing electrode technology is applied in the field of cement-based mortar sensing electrodes and sulfate erosion monitoring sensing devices, which can solve the problems of concrete falling off, inability to realize real-time online monitoring and data collection of concrete erosion and damage, and the like. Achieve the effect of low cost, stable performance and sensitive response

Inactive Publication Date: 2014-01-22
HOHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the process of concrete being corroded by sulfate, although the surface of the concrete will have cracks and local peeling after corroding to a certain extent, the degree of damage, damage process and remaining life caused by sulfate corrosion cannot be satisfied by visual inspection alone. required
Looking at the existing monitoring technologies for concrete durability at home and abroad, the real-time online monitoring and data collection of the damage degree and damage process of concrete by sulfuric acid erosion have not yet been realized.

Method used

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  • Cement-based mortar sensing electrode internally doped with nano-conductive material, as well as preparation method and application thereof
  • Cement-based mortar sensing electrode internally doped with nano-conductive material, as well as preparation method and application thereof
  • Cement-based mortar sensing electrode internally doped with nano-conductive material, as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Sensing device for sulfate attack monitoring in concrete, see figure 2 , the device consists of a fixed bracket 5 and five cement-based mortar sensing electrodes 1 doped with nano-conductive materials that are arranged in parallel on the fixed bracket 5 above Zixia, and the adjacent cement-based mortar sensing electrodes 1 doped with nano-conductive materials The center distance between the electrodes 1 is 30mm. Optionally, the spacing can also be reasonably set according to the detection needs, preferably 10-50mm; the cement-based mortar sensing electrode 1 doped with nano-conductive materials is a cylinder with a length of 40cm, The diameter of the bottom surface is 10mm. Optionally, its shape and size can be reasonably set according to the needs. The preferred length is 30-50mm and the diameter of the bottom surface is 5-10mm; The conductive adhesive 3 is connected with stainless steel mesh 2, and each stainless steel mesh 2 is independently connected to a wire 4 an...

Embodiment 2

[0041] The device of Example 2 is basically the same as that of Example 1, except that the cement-based mortar sensing electrode 1 doped with nano-conductive materials has a height of 40 mm, a bottom diameter of 5 mm, and the distance between adjacent sensing electrodes is 20 mm.

[0042] For comparison, the binding position of the monitoring device in this example is near the device in Example 1, so as to ensure the consistency of the sulfate corrosion environment in the two examples. The assay method is the same as in Example 1, and the assay results are shown in Table 2.

[0043] Table 2 utilizes device of the present invention to measure sulfate to the erosion of concrete in a certain place in Jiangsu

[0044]

[0045] It can be seen from Table 1 that the depth of sulfate erosion of the concrete in this place is 6.5-11.5 mm measured by the above method within one year.

[0046] The results show that: the sulfate erosion rate measured by the device of the present invent...

Embodiment 3

[0048] The device of embodiment 3 is basically the same as that of embodiment 1, except that the size of the cement-based mortar sensing electrode 1 doped with nano-conductive material is 30 mm high, 8 mm in diameter at the bottom, and the distance between adjacent sensing electrodes is 10 mm. ; The preparation process parameters of the sensing electrode are slightly different, the method is as follows:

[0049] (1) Add graphene and nano-conductive carbon black into the dispersant aqueous solution, stir or ultrasonically disperse the graphene and nano-conductive carbon black evenly, and obtain a mixed solution; specifically, according to the amount of cement to be mixed with nano-conductive materials to be prepared 0.5% and 0.8% of Graphene and Nano Conductive Carbon Black were weighed respectively and added to the aqueous dispersant solution with a concentration of 0.01%. The dispersant used was nonylphenol and ethylene oxide condensate; The nano conductive carbon black is co...

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Abstract

The invention provides a cement-based mortar sensing electrode internally doped with a nano-conductive material. The cement-based mortar sensing electrode comprises a cement base body, as well as graphene and nano-conductive carbon black which are dispersed in the cement base body. The invention further provides a preparation method of the electrode. The invention further provides a device for monitoring and sensing sulfate attack in concrete, which comprises the electrode. The electrode has the advantages of simple preparation process, low cost, stable performance, sensitivity in response and reliable detection data.

Description

technical field [0001] The invention relates to a cement-based mortar sensing electrode doped with nano-conductive materials, a preparation method for the electrode, and a monitoring and sensing device for sulfate erosion in concrete including the above-mentioned electrode, which belongs to civil engineering material technology field. Background technique [0002] Concrete is the most widely used structural material in civil engineering. Due to the many defects such as capillary pores, microcracks, and interface transition zones inside the concrete, it is vulnerable to the erosion of harmful ions in the air, groundwater, and soil, resulting in a decrease in strength and durability, and ultimately leads to a decrease in service life and structural failure. destruction. Among many types of corrosion, sulfate attack is one of the most important reasons for the deterioration of concrete durability. Both soil and groundwater contain a large amount of sulfate ions. These ions p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B14/36C04B111/94
Inventor 蒋林华熊传胜宋子健刘蓉游渌棽王涛
Owner HOHAI UNIV
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