Concrete curing method for repairing cracks in winter in cold regions

A technology for repairing cracks and concrete, which is applied in earthwork drilling, building maintenance, road repair, etc. It can solve the problems that cracks in concrete structures cannot be repaired, and achieve the effect of stable and long-lasting hydration process, good fluidity and uniform maintenance

Active Publication Date: 2022-07-15
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a concrete maintenance method for repairing cracks in winter in cold regions, so as to solve the problem that cracks in concrete structures cannot be repaired in winter in cold regions

Method used

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  • Concrete curing method for repairing cracks in winter in cold regions
  • Concrete curing method for repairing cracks in winter in cold regions
  • Concrete curing method for repairing cracks in winter in cold regions

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Experimental program
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specific Embodiment approach 1

[0042] Embodiment 1: Combining Figure 1 to Figure 11 This embodiment is described. This embodiment includes an infrared thermal imager 4, a voltage regulator 5, a temperature control switch 6, an alarm 7 and two electrode syringes 1, each electrode syringe 1 includes a flat needle 1-1, an electrode The tablet 1-2 and the injection body 1-3, the flat needle 1-1 is detachably connected to the discharge end of the injection body 1-3, and the flat needle 1-1 is detachably connected to the injection body 1-3. At the discharge end, one end of the flat needle 1-1 is a feed port that communicates with the discharge end of the injection body 1-3, the other end of the flat needle 1-1 is processed with a discharge port 10, and the flat needle 1-1 An electrode sheet 1-2 is arranged on the outer side wall of the injector, the injection body 1-3 is filled with conductive concrete, and the two electrode sheets 1-2 of the two electrode syringes 1 are electrically connected to the voltage reg...

specific Embodiment approach 2

[0049] Specific implementation mode 2: Combining Figure 1 to Figure 5 This embodiment is described. The curing method in this embodiment is to heat conductive fibers in freshly mixed cement mortar to form conductive concrete, fill the conductive concrete into the electrode syringe 1, and insert the flat needle 1-1 into the existing concrete project. In the cracking gap 16, the piston end of the injection body 1-3 is controlled so that the conductive concrete fills the cracking gap 16 through the discharge port 10 of the flat needle 1-1. After filling, the injection body 1-3 is disassembled from the flat needle 1-1. Then, the electrode sheet 1-2 on the flat needle 1-1 is electrically connected to the voltage regulator 5, and according to the different resistances generated by the conductive concrete in the crack 16, the voltage regulator 5 is used to apply the corresponding voltage to the conductive concrete, Use the infrared thermal imager 4 to monitor the temperature at the ...

specific Embodiment approach 3

[0051] Embodiment 3: This embodiment is a further limitation of Embodiment 1 or 2. The detailed operation steps of the maintenance method described in this embodiment are:

[0052] Step 1: Preparation and use of cement mortar:

[0053] The preparation process is to add conductive fibers to the traditional cement mortar to form conductive concrete, and the conductive concrete is a fiber-reinforced cement-based composite material. The concrete is squeezed into the cracked gap 16 in the concrete project;

[0054] Step 2: After filling the crack 16, the injection body 1-3 is separated from the flat needle 1-1, and the flat needle 1-1 continues to stay in the crack 16. 1 Turn on the power, measure the resistance of the conductive concrete, set the infrared thermal imager 4 to the temperature cloud map display mode, and observe the temperature cloud map distribution. Adjust the flat needle 1-1; when the temperature difference between the highest temperature and the lowest temperat...

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Abstract

A curing method for concrete used for repairing cracks in winter in cold regions. After the concrete structure cracks in the cold region in winter, the current method cannot achieve rapid repair on site, which brings great difficulties to the continued use of the structure. In the present invention, each electrode type syringe of the filling curing device includes a flat needle, an electrode sheet and an injection body. The flat needle is detachably connected to the discharge end of the injection body, and one end of the flat needle is connected to the discharge end of the injection body. The other end of the flat needle is processed with a discharge port, the outer wall of the flat needle is provided with an electrode sheet, the injection body is filled with conductive concrete, and the two electrode sheets of the two electrode syringes are connected with the pressure regulator. The voltage regulator is connected with the infrared thermal imager through the temperature control switch, and the infrared thermal imager is also equipped with an alarm. The invention is used for quick repair of cracked parts of concrete structures in winter in cold regions.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and particularly relates to a curing method for concrete used for repairing cracks in cold regions in winter. Background technique [0002] With the development of the construction industry, concrete is more and more used in water conservancy projects, road projects, culverts, tunnels, bridges and building structures due to its excellent quality and low cost. Similarly, due to the poor tensile and shear resistance of concrete, concrete is prone to cracking, resulting in insufficient strength development and a decline in durability quality, thus affecting the normal use of concrete. There are many main methods of repairing concrete cracks, mainly including grouting method, dry filling method, nailing method, polymer immersion method (gravity infiltration and vacuum infiltration), surface sealing method, etc. Among them, the surface sealing method is the most common construction method. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04G23/02E02B3/16E01D22/00E01C23/09E21D11/10C04B40/02
CPCE04G23/0211E02B3/16E01D22/00E01C23/098E21D11/105C04B40/0263
Inventor 刘雨时王伟田伟辰
Owner HARBIN INST OF TECH
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