Maintenance method for a small test device for testing the connection performance of a wind power grouting material

Abstract

The present application relates to a kind of wind power grouting material grouting connection performance small test device maintenance method, applied to the small test device including core column, outer tube and grouting material, comprising the following steps, using high water-retention paste material to the exposed surface of grouting material of small test device is kept moist;Utilize plastic mold and sealing paste to seal paste material, avoid water loss;Small test device is maintained in constant temperature dry environment.Can guarantee the normal maintenance of concrete, reduce the influence on the performance of concrete, avoid the corrosion of core column and outer tube contact moisture, so that the small test device after maintenance effectively reflects the actual application performance of real grouting connection section, facilitate to paste strain gauge, simplify test process.

Description

Technical Field

[0001] The invention relates to the technical field of building materials, in particular to a maintenance method for a small-scale test device for grouting connection performance of wind power grouting materials. Background Art

[0002] Offshore wind power generation has gradually become a focus of research and development. Small-scale test devices for wind power grouting material grouting joint performance can reflect the mechanical properties of the grouting material in the grouting joint section. Currently, the curing method for these small-scale test devices still uses standard concrete curing methods, that is, curing the specimens at a temperature of 20±2°C and a humidity greater than 95% for 28 days.

[0003] The small test device usually consists of an outer tube, a core column located inside the outer tube, and a grouting section cast between the core column and the outer tube. One end of the core column extends outside the outer tube, and multiple strain gauges are installed on the outer wall of the outer tube.

[0004] It has the following technical problems:

[0005] Since the outer tube of the small test device is made of steel, curing it in an environment with a humidity greater than 95% will cause serious rust on the core column and the outer tube. The rust on the upper end of the core column and the lower end of the outer tube will affect the loading, and the rust on the surface of the outer tube will affect the adhesion of the strain gauge on the outside. Subsequent experiments can only be carried out after rust removal, but the rust removal process is very difficult, which seriously affects the experimental efficiency and makes it difficult to carry out the mechanical properties experiment of the small test device for the grouting connection performance of wind power grouting materials in a timely manner at a fixed age. Summary of the Invention

[0006] In view of the problems existing in the prior art, the purpose of the present invention is to provide a maintenance method for a small-scale test device for the grouting connection performance of wind power grouting materials, which can avoid rust on the surface of the core column and the outer tube, simplify the experimental process, and improve the test efficiency.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A maintenance method for a small-scale test device for grouting connection performance of wind power grouting material is applied to a small-scale test device including a core column, an outer cylinder and grouting material, comprising the following steps:

[0009] A paste material with high water retention was used to moisturize the exposed surface of the grouting material in the small test device;

[0010] Use plastic molds and sealing paste to seal the paste material to prevent moisture loss;

[0011] The small test device was maintained in a constant temperature and dry environment.

[0012] Furthermore, moisturizing the exposed surface of the grouting material includes:

[0013] Turn the small test device upside down, place a plastic plate for calibrating thickness on top of the core column, fill the space between the outer cylinder and the plastic plate for calibrating thickness with paste material so that the paste material covers the grouting material, and cover the lower plastic mold under the plastic plate for calibrating thickness;

[0014] After the paste material hardens, the small test device is turned over, and a plastic ring for calibrating thickness is placed on the upper part of the outer cylinder of the small test device. The plastic ring for calibrating thickness is sleeved on the core column, and the paste material is filled between the core column and the plastic ring for calibrating thickness so that the paste material covers the grouting material. An upper plastic mold is placed outside the core column so that the upper plastic mold covers the plastic ring for calibrating thickness and the grouting material.

[0015] Furthermore, the lower plastic mold is clamped to the inner wall of the outer cylinder.

[0016] Furthermore, the lower plastic mold is fixed in the outer cylinder with glass glue.

[0017] Furthermore, sealing the paste material includes applying sealing paste to the gap between the outer cylinder and the lower plastic mold, the gap between the upper plastic mold, the thickness-setting plastic ring and the core column.

[0018] Furthermore, the upper plastic mold, the plastic ring for calibrating thickness, the plastic plate for calibrating thickness and the lower plastic mold are all made of organic glass, wherein the upper plastic mold and the plastic plate for calibrating thickness are cut from the same piece of organic glass, and the lower plastic mold and the plastic ring for calibrating thickness are cut from the same piece of organic glass.

[0019] Furthermore, the lower plastic mold is provided with a handle.

[0020] Furthermore, the paste material is prepared by high water retention agent resin and water in a certain proportion. It has high fluidity initially to facilitate pouring into a small-scale test device for grouting connection performance of wind power grouting materials. It becomes a paste after a short time to avoid water loss.

[0021] Furthermore, the small test device was placed in a constant temperature dry curing room with a temperature of 20±2°C and a relative humidity of less than 60% for curing to prevent the outer cylinder and the core column from rusting due to contact with moisture.

[0022] In general, the present invention has the following advantages:

[0023] During curing, a highly water-retaining paste material is used to moisturize the exposed surface of the grouting material, and the paste material is sealed with a plastic mold and sealing paste to prevent water loss and maintain the moisture requirements of the concrete during curing. Therefore, placing the small test device in a constant temperature and dry environment can not only ensure the normal curing of the concrete and reduce the impact on the concrete performance, but also prevent the core column and outer cylinder from rusting due to contact with moisture. The small test device after curing can effectively reflect the actual application performance of the real grouting connection section, facilitate the pasting of strain gauges, and simplify the test process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic cross-sectional view of an embodiment of the present invention.

[0025] Figure 2 This is a top sectional view of an upper plastic mold and a plastic plate for calibrating thickness according to an embodiment of the present invention.

[0026] Figure 3 This is a top sectional view of the lower plastic mold and the plastic ring for calibrating thickness according to an embodiment of the present invention.

[0027] Description of reference numerals:

[0028] 1-core column, 2-upper plastic mold, 3-plastic ring for thickness calibration, 4-paste material, 5-outer cylinder, 6-grouting section, 7-plastic plate for thickness calibration, 8-lower plastic mold, 9-handle. DETAILED DESCRIPTION

[0029] The present invention will be described in further detail below.

[0030] like Figure 1 As shown, a small-scale test device for the grouting connection performance of wind power grouting material includes a core column 1 and an outer cylinder 5.

[0031] In this embodiment, the inner diameter of the outer cylinder 5 is 98 mm, the wall thickness is 7 mm, and the height is 180 mm; the inner diameter of the core column 1 is 48 mm; and the outer cylinder 5 is sleeved outside the core column 1.

[0032] Grouting material is poured between the core column 1 and the outer tube 5 to form a grouting section 6. The thickness of the grouting section 6 is 25 mm and the length of the grouting section 6 is 150 mm. The core column 1 extends 50 mm outside the outer tube 5. Multiple strain gauges are provided on the outer wall of the outer tube 5.

[0033] The plastic ring 3 for calibrating thickness has an inner diameter of 98mm, an outer diameter of 112mm and a thickness of 8mm and is placed on the top of the outer cylinder 5. The inside of the outer cylinder is evenly covered with a paste material 4 prepared by mixing a high water retention agent resin and an appropriate amount of water, and its thickness shall not exceed the plastic ring 3 for calibrating thickness.

[0034] The upper plastic mold 2 has an inner diameter of 50 mm, an outer diameter of 112 mm, and a thickness of 5 mm and is placed on the calibrating plastic ring 3. Use sealing paste to seal the gaps between the outer cylinder 5 and the calibrating plastic ring 3, as well as between the upper plastic mold 2, the calibrating plastic ring 3, and the core column 1.

[0035] A plastic plate 7 for calibrating thickness, with an inner diameter of 12 mm, an outer diameter of 39 mm, and a thickness of 5 mm, is placed under the core column 1. The plate is evenly covered with the paste material 4, its thickness not exceeding that of the upper layer of the base. In this embodiment, the paste material 4 is prepared by mixing a high-water-retention agent resin and water in a ratio of 1:100.

[0036] The lower plastic mold 8 has an inner diameter of 5mm, an outer diameter of 97mm and a thickness of 8mm. It is placed under the plastic plate 7 for thickness calibration and fixed with glass glue or the like. The gap between the outer cylinder 5 and the lower plastic mold 8 is then sealed with sealing paste.

[0037] The handle 9 and the lower plastic mold 8 are connected with bolts to facilitate demoulding.

[0038] like Figure 2 As shown, an acrylic plate with a thickness of 5 mm can be cut into an upper plastic mold 2 with an inner diameter of 50 mm and an outer diameter of 112 mm and a calibrating plastic plate 7 with an inner diameter of 12 mm and an outer diameter of 39 mm.

[0039] like Figure 3 As shown, a plastic ring 3 for calibrating thickness with an inner diameter of 98 mm and an outer diameter of 112 mm and a lower plastic mold 8 with an inner diameter of 5 mm and an outer diameter of 97 mm can be cut out of an acrylic plate with a thickness of 8 mm.

[0040] In this embodiment, the maintenance method of the small-scale grouting connection performance test device is as follows:

[0041] 1) Pour grouting material between the core column 1 and the outer tube 5 to form a grouting section 6. After removing the mold, turn the small test device upside down, place a plastic plate 7 for calibrating thickness on the surface of the core column 1, and then spread a paste material 4 prepared by mixing a high-water retention agent resin and an appropriate amount of water on the surface of the grouting material;

[0042] 2) Cover the bottom of the outer cylinder 5 with the lower plastic mold 8 and fix it with glass glue, etc. Then apply sealing paste to the gap between the outer cylinder 5 and the lower plastic mold 8 to seal it;

[0043] 3) After the glue hardens, turn the small test device over, place the calibrating plastic ring 3 on the top of the outer cylinder 5, and apply sealing paste to the gap between the outer cylinder 5 and the calibrating plastic ring 3 to seal it;

[0044] 4) Spread the paste material 4 on the surface of the grouting section 6, place the upper plastic mold 2 on the plastic ring 3 for calibrating thickness, and apply sealing paste to the gap between the upper plastic mold 2, the plastic ring 3 for calibrating thickness, and the core column 1 to seal;

[0045] 5) Place the small test device in a constant temperature dry curing room for curing.

[0046] The present invention has the following advantages:

[0047] 1) High water-retention resin is used as a water-retention material inside the thickness-setting plastic ring 3 and outside the thickness-setting plastic plate 7. A paste material 4 prepared by mixing the high water-retention resin with an appropriate amount of water is used to moisturize the exposed surface of the grouting section 6 to ensure that the concrete has sufficient moisture for curing.

[0048] 2) The upper plastic mold 2 and the lower plastic mold 8 are coated with sealing paste on the upper surface and the lower surface respectively, so as to reduce the loss of water in the water-retaining material.

[0049] 3) The gap between the lower plastic mold 8 and the outer cylinder 5 is connected with glass glue, so as to avoid the falling of the lower plastic mold 8 and keep good sealing.

[0050] 4) The handle 9 and the lower plastic mold 8 are connected with bolts, so as to facilitate the disassembly of the mold.

[0051] 5) The small test device is placed in a constant temperature and dry curing room with a temperature of 20±2℃ for 28 days, so as to avoid the rusting of the core column 1 and the outer cylinder 5 due to the contact with humid air, to make the small test device after curing effectively reflect the actual application performance of the grouting connection section, to facilitate the pasting of strain gauges and to simplify the test process.

[0052] The above embodiment is the preferred embodiment of the present application, but the embodiment of the present application is not limited by the above embodiment, and any change, modification, replacement, combination, simplification made without departing from the spirit and principle of the present application shall be equivalent replacement mode and shall be included in the protection scope of the present application.

Claims

1. A maintenance method for a small-scale test device for grouting connection performance of wind power grouting material, applied to a small-scale test device comprising a core column, an outer cylinder and grouting material, characterized in that: The following steps are included: A paste material with high water retention was used to moisturize the exposed surface of the grouting material in the small test device; Use plastic molds and sealing paste to seal the paste material to prevent moisture loss; Maintain the small test device in a constant temperature and dry environment; Moisturizing the exposed surface of the grouting material includes: Turn the small test device upside down, place a plastic plate for calibrating thickness on top of the core column, fill the space between the outer cylinder and the plastic plate for calibrating thickness with paste material so that the paste material covers the grouting material, and cover the lower plastic mold under the plastic plate for calibrating thickness; After the paste material hardens, the small test device is turned over, and a plastic ring for calibrating thickness is placed on the upper part of the outer cylinder of the small test device. The plastic ring for calibrating thickness is sleeved on the core column, and the paste material is filled between the core column and the plastic ring for calibrating thickness so that the paste material covers the grouting material. An upper plastic mold is placed outside the core column so that the upper plastic mold covers the plastic ring for calibrating thickness and the grouting material.

2. A maintenance method for a small-scale test device for grouting connection performance of wind power grouting material according to claim 1, characterized in that: The lower plastic mold is clamped on the inner wall of the outer cylinder.

3. A maintenance method for a small-scale test device for grouting connection performance of wind power grouting material according to claim 2, characterized in that: The lower plastic mold is fixed in the outer cylinder with glass glue.

4. The maintenance method of a small-scale test device for grouting connection performance of wind power grouting material according to claim 1, characterized in that: Sealing the paste material includes applying sealing paste to the gap between the outer cylinder and the lower plastic mold, the gap between the upper plastic mold, the plastic ring for calibrating thickness and the core column.

5. The maintenance method of a small-scale test device for grouting connection performance of wind power grouting material according to claim 1, characterized in that: The upper plastic mold, the plastic ring for calibrating thickness, the plastic plate for calibrating thickness and the lower plastic mold are all made of organic glass, wherein the upper plastic mold and the plastic plate for calibrating thickness are cut from the same piece of organic glass, and the lower plastic mold and the plastic ring for calibrating thickness are cut from the same piece of organic glass.

6. The maintenance method of a small-scale test device for grouting connection performance of wind power grouting material according to claim 1, characterized in that: The lower plastic mold is provided with a handle.

7. The maintenance method of a small-scale test device for grouting connection performance of wind power grouting material according to claim 1, characterized in that: The paste material is made of high water retention agent resin and water in a certain proportion. It has high fluidity initially to facilitate pouring into the small-scale test device for the grouting connection performance of wind power grouting materials. It becomes a paste after a short time to avoid water loss.

8. The maintenance method of a small-scale test device for grouting connection performance of wind power grouting material according to claim 1, characterized in that: The small test device was placed in a constant temperature dry curing room with a temperature of 20±2℃ and a relative humidity below 60% for curing to prevent the outer cylinder and core column from rusting due to contact with moisture.

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