A device and method for measuring the roughness of a concrete roughened surface

Abstract

The present invention discloses a device and a measurement method for measuring the roughness of a concrete roughened surface. The device includes a sleeve, a piston located inside the sleeve and a push-pull baffle, a piston rod connected to the piston, a positioning ring located outside the bottom of the sleeve and a cushion strip connected to the positioning ring. The top of the piston rod is connected to a pressing handle. A limiting block and an electromagnet device are arranged on the upper part of the piston. The electromagnet switch is located outside the sleeve. The top of the sleeve is closed by a cover plate, and the bottom is connected to a bottom plate with holes. When measuring the roughness, magnetic putty is loaded into the inside of the sleeve. The structure of the present invention is reasonable and the cost is low. It is very convenient to operate, can be used for measuring the roughness of concrete roughened surfaces in different directions, has a high precision, and the detection consumables are convenient for recycling and reuse.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete measurement, and particularly to a device and a measurement method for measuring the roughness of a concrete roughened surface. Background Art

[0002] In recent years, with the acceleration of the urbanization process in China and the continuous expansion of the scale of infrastructure construction, higher requirements have been put forward for construction quality and construction efficiency. Compared with the construction of traditional cast-in-place structures, prefabricated structures are constructed by prefabricating components in factories and assembling them on site, which can greatly improve the level of mechanized operation, speed up the construction progress while improving the quality, reduce the interference to the existing traffic, and is conducive to environmental protection. Therefore, prefabricated structures have become the development trend of current engineering construction. At present, the main construction processes of prefabricated structures are precast components, hoisting and splicing, and joint treatment. Among them, joint treatment generally requires prior roughening treatment of the concrete surface before the joint concrete can be poured. The quality of the concrete roughened surface plays an important role in whether the connection between components is safe and reliable. Among them, the roughness of the roughened surface is a very important evaluation index, which is the average depth of the open pores with unevenness on the concrete surface of a certain area.

[0003] At present, the measurement methods of roughness mainly include the sand filling method, the silica powder stacking method, the stylus method, and the fractal dimension method, etc.

[0004] For the sand filling method, the area to be measured is surrounded, and then filled with sand. A board is covered on the sand, and the height of the board is flush with the highest point in the area to be measured. Then the sand is taken out, and the roughness is calculated according to the proportional relationship between the volume of the used sand and the area of the area to be measured. Although the operation of the sand filling method is simple, it is not suitable for use on inclined, vertical, and horizontally downward surfaces except for horizontal surfaces. In addition, the sand filling method requires the use of sand, and it is not easy to completely remove after testing. Therefore, this method is not convenient to be applied in engineering.

[0005] The silica powder stacking method has strict requirements for the materials used. Similar to the sand filling method, it is only suitable for the measurement of horizontal upward surfaces, and it is not easy to completely remove after measurement; the stylus method needs to measure several convex and concave curves along a certain direction and requires a reference line, with complex operation and slow speed, and is not suitable for on-site measurement in actual engineering; the fractal dimension method can ensure the accuracy of the measurement results, but the data acquisition process is slow, the operation is complex, and it is not suitable for application in actual engineering either.

[0006] Considering the disadvantages of the above methods, there is a great practical need to develop a device with simple operation, fast measurement speed, high accuracy, convenient recycling and reuse of detection consumables, and can be used for measuring the roughness of concrete roughened surfaces in different orientations. Summary of the Invention

[0007] Aiming at the problem of difficult measurement of the roughness of the chiseled surface of precast concrete components, the present invention provides a device and a measurement method for measuring the roughness of the chiseled concrete surface, realizing the rapid measurement of the roughness of the chiseled surface.

[0008] The present invention is realized through the following technical solutions:

[0009] A device for measuring the roughness of a chiseled concrete surface includes a sleeve, and a piston, magnetic putty, a baffle, and a bottom plate arranged therein from top to bottom;

[0010] The bottom plate is arranged at the lower end of the sleeve, and a plurality of holes are arranged in an array on the bottom plate, and the bottom plate is used to cover the surface to be measured;

[0011] The baffle can move radially along the sleeve, and is used to connect the space between the piston and the bottom plate;

[0012] Before measurement, the magnetic putty is located between the piston and the baffle;

[0013] During measurement, the baffle is moved radially, and the piston can make the magnetic putty flow through the holes of the bottom plate to the measurement area of the surface to be measured.

[0014] Preferably, a piston rod is further arranged at the top of the piston, and is used to control the axial movement of the piston along the sleeve.

[0015] Preferably, a scale is arranged on the piston rod, and is used to record the moving distance of the piston.

[0016] Preferably, an electromagnet is further arranged at the top of the piston, and the electromagnet is connected to an electromagnet switch.

[0017] Preferably, a positioning ring is further arranged at the lower end of the outer wall of the sleeve, and a gasket is arranged at the lower end of the positioning ring, which is used to seal the lower end of the sleeve and the area to be measured during measurement.

[0018] Preferably, the cross-section of the sleeve is rectangular, a horizontal mounting hole is arranged on one side wall of the sleeve, one end of the baffle extends into the sleeve from the mounting hole, and is clamped with the inner wall of the other parallel side wall.

[0019] The present invention also provides a measurement method for the above-mentioned device for measuring the roughness of a chiseled concrete surface, including the following steps:

[0020] Step 1: Obtain the distance d from the top of the bottom plate to the top of the baffle;

[0021] Step 2: Extract the baffle, so that the piston pushes the magnetic putty to flow through the holes of the bottom plate into the surface to be measured, and obtain the moving distance m of the piston;

[0022] Step 3: Determine the volume V of the magnetic putty embedded in the surface to be measured and the holes of the bottom plate according to the distance d and the moving distance m;

[0023] Step 4: Determine the volume V1 of the magnetic putty embedded in the holes of the bottom plate.

[0024] V1 = nπR 2 t

[0025] where n is the number of round holes, t is the height of the holes, and R is the radius of the round holes in the bottom plate.

[0026] Step 5: Determine the volume V2 of the magnetic putty embedded in the surface to be measured according to the volume V and the volume V1.

[0027] V2 = V - V1;

[0028] Step 6: Determine the cross-sectional area S enclosed by the outer wall of the sleeve.

[0029] Step 7: Determine the roughness h of the surface to be measured according to the volume V2 and the cross-sectional area S.

[0030]

[0031] Preferably, the method for obtaining the moving distance m of the piston in Step 2 is as follows:

[0032] First, record the scale value h1 corresponding to the piston rod at the top of the sleeve cover when the compacted magnetic putty is located between the piston and the baffle.

[0033] Then, record the scale value h2 corresponding to the piston rod at the top of the sleeve cover when the magnetic putty flows into the surface to be measured.

[0034] m = h1 - h2

[0035] Preferably, the method for determining the volume V of the magnetic putty embedded in the surface to be measured and the holes of the bottom plate in Step 3 is as follows:

[0036] V = (h1 - h2 - d)a 2

[0037] where a 2 is the cross-sectional area inside the sleeve.

[0038] Compared with the prior art, the present invention has the following beneficial technical effects:

[0039] A roughness measuring device for a concrete roughened surface includes a sleeve, a piston, magnetic putty, a bottom plate, and a movably arranged baffle disposed inside. By controlling the piston, the magnetic putty is made to flow into the surface to be measured. By subtracting the distance from the baffle to the bottom plate from the moving distance of the piston, the amount of magnetic putty embedded in the surface to be measured can be obtained, and thus the roughness of the surface to be measured can be obtained. The device has a simple structure, is easy to operate, and can quickly complete the measurement of the roughness of the roughened surface.

[0040] Further, a piston rod is provided at the top of the piston, and a scale is set on it, which is convenient for observing the moving distance of the piston, simplifies the method for determining the moving distance, and improves the measurement efficiency.

[0041] Further, an electromagnet is provided at the top of the piston. When the measurement is completed, the electromagnet is magnetized to make the magnetic putty adsorbed on the piston, which is convenient for the recovery of the magnetic putty.

[0042] Further, the lower end of the sleeve and the surface to be measured are sealed by a gasket strip to prevent the leakage of the magnetic putty and avoid affecting the measurement accuracy of the roughness.

[0043] Further, holes are opened on the side wall of the sleeve to facilitate the extraction of the baffle.

[0044] The present invention also provides a measurement method for the above-mentioned concrete roughened surface roughness measurement device. By the moving distance of the piston and the distance from the baffle to the bottom plate, the amount of the magnetic putty embedded in the bottom plate and the surface to be measured is determined. In order to reduce errors, the amount of the magnetic putty embedded in the holes of the bottom plate is further determined, and then the accurate amount embedded in the surface to be measured is obtained. Furthermore, the roughness of the surface to be measured is obtained according to the roughness formula. This method has accurate measurement and convenient operation, greatly improving the measurement efficiency and accuracy of the roughness. Description of the Drawings

[0045] Figure 1 is a schematic structural diagram of the measurement device of the present invention;

[0046] Figure 2 is a bottom plan view of the measurement device of the present invention;

[0047] Figure 3 is a schematic partial structure diagram of the sleeve at the baffle of the present invention;

[0048] Figure 4 is a schematic structure diagram of the baffle of the present invention;

[0049] Figure 5 is a schematic diagram of the sleeve and the baffle closely combined of the present invention;

[0050] Figure 6 is a structural diagram of the measurement device of the present invention before measurement;

[0051] Figure 7 is a structural diagram of the measurement device of the present invention during measurement.

[0052] In the figure: 1 - piston; 2 - electromagnet switch; 3 - cover plate; 4 - piston rod; 5 - pressing handle; 6 - scale; 7 - electromagnet; 8 - limit stop; 9 - sleeve; 10 - baffle; 11 - positioning ring; 12 - gasket strip; 13 - bottom plate; 14 - trapezoidal groove; 15 - hook groove; 16 - hook; 17 - push-pull handle; 18 - magnetic putty; 19 - concrete roughened surface. Detailed implementation mode

[0053] The present invention will be further described in detail below with reference to the accompanying drawings. The following is an explanation of the present invention rather than a limitation.

[0054] As Figures 1 - 5 shown, a device for quickly measuring the roughness of a concrete roughened surface includes a sleeve 9, a piston 1 located inside the sleeve, a piston rod 4 connected to the top of the piston 1, the upper end of the piston rod 4 extending out of the top of the sleeve 9, a pressing handle 5 provided at the upper end of the piston rod 4, and the piston is controlled to move in the sleeve by the pressing handle 5. A scale area 6 is also provided on the piston rod 4 for observing the moving distance of the piston 1.

[0055] A limit stop block 8 is provided at the top of the piston 1 for controlling the upward movement distance of the piston; an electromagnet 7 is also provided at the top of the piston 1, and an electromagnet switch 2 is located outside the sleeve 9.

[0056] As Figure 2 shown, the sleeve 9 has an open structure at both ends. The top of the sleeve 9 is closed by a cover plate 3, and a bottom plate 13 is provided at the bottom of the sleeve 9 to close the lower end of the sleeve. A plurality of holes are arranged in an array on the bottom plate 13, and magnetic putty 18 is filled between the bottom plate and the piston. The magnetic putty 18 has the characteristics of high fluidity and low compressibility.

[0057] A movable baffle 10 is also provided in the middle of the sleeve 9. The baffle 10 can move horizontally along the radial direction of the sleeve. Before measurement, the magnetic putty 18 is located between the piston and the baffle 10. During measurement, the baffle is moved to make the magnetic putty 18 move towards the bottom plate.

[0058] As Figures 3 - 5 shown, the sleeve 9 is of a rectangular structure. A horizontal mounting hole is provided on one side wall of the sleeve 9, and a groove 14 is provided on the inner wall of the other side wall parallel to this side wall. One end of the baffle 10 is horizontally inserted from the mounting hole and inserted into the groove 14.

[0059] A hook 16 is provided at the bottom of the end of the baffle 10 inserted into the groove 14. A push-pull handle 17 is provided at the other end of the baffle 10. A hook groove 15 matching the hook 16 is provided at the end of the mounting hole and is located inside the side wall of the sleeve. When the baffle 10 is pulled outwards from the sleeve, the hook 16 is stuck in the hook groove 15 to prevent the baffle 10 from separating from the sleeve.

[0060] The baffle 10 is square, and its width is the same as the inner width of the sleeve. A positioning ring 11 is provided at the lower part of the outer wall of the sleeve 9, and a cushion strip 12 is provided at the bottom of the positioning ring 11. The cushion strip 12 is made of a material with easy compressibility, high elasticity and small lateral deformation, such as high-elastic sponge.

[0061] The measurement method of a rapid measurement device for the roughness of a concrete roughened surface provided by the present invention will be described in detail below, including the following steps:

[0062] Before measurement, clean the to-be-measured concrete roughened surface 19 with a soft brush.

[0063] As Figure 6 shown, estimate the roughness of the to-be-measured surface to determine the amount of magnetic putty 18 filled into the sleeve interior, pull open the baffle 10, and load an appropriate amount of magnetic putty 18 between the piston 1 and the baffle 10.

[0064] Push the baffle 10 to enclose the magnetic putty 18 in the sleeve and locate it between the piston and the baffle. Place the measurement device on the to-be-measured concrete roughened surface, press the handle 5. After the magnetic putty 18 inside the sleeve is flattened and stabilized, read the scale h1 corresponding to the top of the cover plate 3 on the piston rod 4.

[0065] Press the cover plate 3 to make the bottom plate 13 in close contact with the concrete roughened surface 19. At this time, the gasket 12 is compressed to achieve the sealing of the outside of the bottom of the sleeve 9.

[0066] As Figure 7 shown, pull open the baffle 10, press the handle 5, and the magnetic putty 18 in the sleeve enters the to-be-measured surface through the hole of the bottom plate. After the magnetic putty 18 inside the sleeve is flattened and stabilized, read the displacement scale h2 corresponding to the top of the cover plate 3 on the piston rod 4.

[0067] Turn on the electromagnet switch 2, use the magnetic force to recover the magnetic putty 18 embedded in the concrete roughened surface 19, and push the baffle into the sleeve.

[0068] First, calculate the volume of the magnetic putty embedded between the top of the bottom plate 13 and the concrete roughened surface 19 as follows:

[0069] V=(h1 - h2 - d)a 2

[0070] where d is the height from the top surface of the bottom plate to the top surface of the baffle, and a is the side length of the square bottom plate 13.

[0071] Then, calculate the volume of the magnetic putty embedded within the height t of the round holes on the bottom plate 13 as:

[0072] V1 = nπR 2 t

[0073] where n is the number of round holes, t is the height of the round holes, and R is the radius of the round holes on the bottom plate.

[0074] Then, calculate the cross-sectional area S enclosed by the outer wall of the sleeve 9.

[0075] S=(a + 2c) 2

[0076] Among them, c is the thickness of the side wall of the sleeve.

[0077] Secondly, calculate the volume of the magnetic plasticine embedded in the roughened concrete surface 19 within the area S.

[0078] V2 = V - V1 = (h1 - h2 - d)a 2 -nπR 2 t

[0079] Finally, calculate the roughness of the roughened concrete surface 19 within the area S as:

[0080]

[0081] The present invention discloses a device and a measurement method for measuring the roughness of a roughened concrete surface. The device includes a sleeve, a piston and a push-pull baffle located inside the sleeve, a piston rod connected to the piston, a positioning ring located outside the bottom of the sleeve, and a gasket connected to the positioning ring. The top of the piston rod is connected to a pressing handle. A limiting block and an electromagnet device are arranged on the upper part of the piston. The electromagnet switch is located outside the sleeve. The top of the sleeve is closed by a cover plate, and the bottom is connected to a bottom plate with holes. When measuring the roughness, magnetic plasticine is filled inside the sleeve. The structure of the present invention is reasonable and the cost is low. It is very convenient to operate, can be used to measure the roughness of roughened concrete surfaces in different directions, has a high precision, and the detection consumables are convenient for recycling and reuse.

[0082] The above content is only to illustrate the technical idea of the present invention and cannot be used to limit the protection scope of the present invention. Any modification made on the basis of the technical solution according to the technical idea proposed by the present invention falls within the protection scope of the claims of the present invention.

Claims

1. A roughness measurement device for a concrete roughened surface, characterized in that, It includes a sleeve (9), and a piston (1), magnetic putty (18), a baffle (10) and a bottom plate (13) which are arranged inside it from top to bottom; The bottom plate (13) is arranged at the lower end of the sleeve (9), and a plurality of holes are arranged in an array on the bottom plate (13), and the bottom plate (13) is used to cover the surface to be measured; The baffle (10) can move radially along the sleeve and is used to connect the space between the piston (1) and the bottom plate (13); Before measurement, the magnetic putty (18) is located between the piston (1) and the baffle (10); During measurement, when the baffle (10) is moved radially, the piston (1) can make the magnetic putty (18) flow through the holes of the bottom plate (13) to the measurement area of the surface to be measured; A piston rod (4) is further arranged at the top of the piston (1) and is used to control the axial movement of the piston along the sleeve (9). A scale (6) is arranged on the piston rod (4) and is used to record the moving distance of the piston (1). An electromagnet (7) is further arranged at the top of the piston, and the electromagnet (7) is connected to an electromagnet switch (2); A positioning ring (11) is further arranged at the lower end of the outer wall of the sleeve (9), and a gasket (12) is arranged at the lower end of the positioning ring and is used to seal the lower end of the sleeve and the area to be measured during measurement.

2. The roughness measuring device for the chiseled surface of concrete according to claim 1, characterized in that, The cross-section of the sleeve (9) is rectangular. A horizontal mounting hole is arranged on one side wall of the sleeve. One end of the baffle extends into the sleeve from the mounting hole and is clamped with the inner wall of the other parallel side wall.

3. A measuring method for the concrete roughened surface roughness measuring device according to any one of claims 1-2, characterized in that, It includes the following steps: Step 1, obtain the distance from the top of the bottom plate (13) to the top of the baffle (10) d ; Step 2, extract the baffle (10), so that the piston pushes the magnetic putty (18) to flow into the surface to be measured along the hole of the bottom plate (13), and obtain the moving distance of the piston m ; Step 3. Determine the volume of the magnetic putty (18) embedded in the surface to be measured and the hole in the bottom plate according to the distance d and the moving distance m ; V ; Step 4, determine the volume of the magnetic plasticine embedded in the holes of the bottom plate (13) V 1; Among them, n is the number of round holes, t is the height of the hole, R is the radius of the round hole on the bottom plate; Step 5. According to volume V and volume V 1, determine the volume V 2 of the magnetic plasticine (18) embedded in the surface to be measured; ； Step 6. Determine the cross-sectional area enclosed by the outer wall of the sleeve (9). ; Step 7. Determine the roughness h of the surface to be measured according to the volume V 2 and the cross-sectional area , and determine the roughness h of the surface to be measured; 。 4. The measuring method of the concrete roughened surface roughness measuring device according to claim 3, characterized in that, The method for obtaining the moving distance of the piston in Step 2 m is as follows: First, record the scale value corresponding to the piston rod at the top of the sleeve cover plate (3) when the compacted magnetic putty (18) is located between the piston (1) and the baffle (10). h 1; Then, record the scale value corresponding to the piston rod at the top of the sleeve cover plate (3) when the magnetic putty (18) flows into the surface to be measured. h 2; m = h 1- h 2 。 5. The measuring method of the concrete roughened surface roughness measuring device according to claim 4, characterized in that, The method for determining the volume of the magnetic plasticine (18) embedded in the surface to be measured and the holes of the bottom plate in Step 3 is as follows: V as follows: Among them, is the cross-sectional area inside the sleeve.

Images