Sample preparation device for preparing mortar tensile adhesive strength detection test piece

Abstract

The utility model discloses a sample preparation device for preparing a mortar tensile adhesive strength detection test piece, which comprises a fixer, two height positioning tables and a slicking device, the fixer is used for being locked on a building block, the two height positioning tables are symmetrically fixed on two side edges of the fixer, a plurality of steps are arranged on the height positioning tables, and the slicking device is arranged on the fixer. The steps rise step by step from the inner side to the outer side of the height positioning table, the two ends of the strickling device are used for being supported on the steps, and the distance between the lower face of the strickling device and the upper surface of the building block is adjusted by supporting the strickling device on the different steps. The mortar batch scraping device can more scientifically and accurately assist experiment operators in controlling the batch scraping thickness of mortar and uniformly scraping the mortar, and can quickly complete the preparation work of a test piece.

Description

Technical Field

[0001] The utility model relates to the technical field of building material performance detection, in particular to a sample preparation device for preparing a mortar tensile bonding strength detection test piece. Background Art

[0002] Mortar, as a common building material, is widely used in construction. According to different uses, mortar can be divided into thin layer masonry mortar, plastering mortar, interface mortar, plastering gypsum, etc.

[0003] When conducting the mortar tensile bond strength test, the preparation requirements for the mortar tensile bond strength specimens in "Autoclaved Aerated Concrete Wall Special Mortar" JC / T890-2017 are as follows: (1) When preparing thin-layer masonry mortar specimens, first quickly scrape a thin layer of masonry mortar with a thickness of no more than 1 mm on the surface of the standard block as a base, and then apply a thin layer of masonry mortar with a thickness of 2 mm to 3 mm; (2) When preparing plaster mortar specimens, the plaster mortar needs to be scraped twice. On the surface of standard masonry blocks, the first batch of thickness should not exceed 3mm, and the total thickness of plaster mortar should be 5mm, which should not be greater than 8mm; (3) When preparing interface mortar specimens, it is necessary to evenly apply a layer of interface mortar with a thickness of 2mm to 3mm on the surface of standard masonry blocks; (4) When preparing plaster gypsum specimens, it is necessary to apply plaster mortar on the surface of standard masonry blocks twice, and the first batch of thickness should not exceed 2mm, and the total thickness of plaster mortar should be 8mm, which should not be greater than 10mm. Among them, the specifications and dimensions of standard masonry blocks are: length should be 600mm; height should be 250mm, and the minimum should not be less than 200mm; thickness should be 100mm, and the minimum should not be less than 75mm.

[0004] In summary, the key point in preparing mortar specimens is to accurately control the mortar scraping thickness and uniformity on the surface of standard blocks. Too high or too low thickness, or uneven scraping will cause large errors in the test results.

[0005] However, in the existing process of preparing mortar specimens, the thickness and uniformity of the mortar scraping need to rely on the rich work experience and skilled techniques of the experimental operators, and after scraping, auxiliary detection devices need to be used for detection. This not only places high technical requirements on the experimental operators, but also has low efficiency. Utility Model Content

[0006] The purpose of the utility model is to provide a sample preparation device for preparing mortar tensile bond strength test pieces, which can more scientifically and accurately assist experimental operators to control the thickness of the mortar and make it evenly scraped, and quickly complete the preparation of the test piece.

[0007] The purpose of the utility model is achieved through the following technical solutions:

[0008] A sample preparation device for preparing mortar tensile bond strength test pieces, characterized in that it includes a fixture, two height positioning platforms and a scraper, the fixture is used to lock on the top of the block, the two height positioning platforms are symmetrically fixed on both sides of the fixture, a plurality of steps are provided on the height positioning platform, the steps gradually increase from the inside to the outside of the height positioning platform, the two ends of the scraper are used to support on the steps, and the distance between the bottom of the scraper and the upper surface of the block is adjusted by supporting on different steps.

[0009] Furthermore, the scraper includes a square rod and two connecting heads, the ends of the connecting heads are provided with threaded rods, the two connecting heads are respectively connected to the threaded holes at both ends of the square rod through the threaded rods, the square rod is provided with multiple scraping side faces, and the sides of the connecting heads are provided with multiple concave surfaces of different depths aligned with the scraping side faces, and the connecting heads are supported on the steps by their sides or concave surfaces.

[0010] Furthermore, the scraper includes at least two limit blocks, a through hole is provided in the middle of the limit block, the limit block is connected between the connecting head and the square rod, and the threaded rod passes through the through hole.

[0011] Furthermore, the fixer includes four corner kits and four screw assemblies. The four corner kits are respectively used to be sleeved on the four upper corners of the building block. The screw assemblies are used to connect and lock adjacent corner kits. The height positioning platform is fixed between two of the corner kits.

[0012] Furthermore, the corner kit is provided with side panels, vertical panels, upper flat panels and lower flat panels. The vertical panels are vertically connected to the middle of the side panels. The upper flat panel is arranged on the upper side of one side of the vertical panel. The upper flat panel is perpendicular to the side panels and the vertical panel. The cavity surrounded by the upper flat panel, the side panels and the vertical panel is used to be mounted on the corners of the building blocks. The lower flat panel is arranged on the lower side of the other side of the vertical panel. The lower flat panel is used to support the end of the height positioning platform.

[0013] Furthermore, the end of the height positioning platform is fixedly connected to the side plate by means of fixing screws.

[0014] Furthermore, the screw assembly includes a double-headed screw and a ram's horn nut. Horizontal sleeves are respectively provided on the outer side surfaces of the side plate and the outer side surfaces of the vertical plate. The ends of the double-headed screw pass through the sleeves, and the ram's horn nut is threadedly connected to the part of the double-headed screw that passes through the sleeves.

[0015] Furthermore, a notch is provided at the bottom of the height positioning platform for avoiding the double-headed screw.

[0016] Furthermore, the height of each step is 1 mm, and the widths of all steps are equal.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] (1) When in use, the utility model is locked on the top of the block through a fixing device, and the height positioning platform is symmetrically fixed on both sides of the fixing device. The position of the scraper support on the step is adjusted according to the thickness of the mortar to be scraped, thereby adjusting the distance between the bottom of the scraper and the upper surface of the block, and then the scraper is used to reciprocate and scrape the mortar on the upper surface of the block to obtain mortar of a set thickness. The operation is simple and easy to use, and can assist the experimental operator to more scientifically and accurately control the scraping thickness and uniformity of the mortar, thereby improving the accuracy of the test results. The utility model reduces the difficulty and intensity of the work of the experimental operator and greatly improves the work efficiency.

[0019] (2) In the present invention, the range of mortar scraping thickness in the block can be increased by increasing the number of steps, and mortar scraping with any thickness from 1 mm to 10 mm can be performed on the surface of the block, thereby enriching the scope of use of the present invention.

[0020] (3) The utility model can adapt to non-standard blocks by replacing height positioning tables and scrapers of different sizes, thereby scraping mortar of target thickness on the surface of non-standard blocks, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional schematic diagram of the sample preparation device of the utility model embodiment when it is installed on the building block;

[0022] Figure 2 It is a three-dimensional schematic diagram of a fixing device according to an embodiment of the utility model installed on a building block;

[0023] Figure 3 It is one of the three-dimensional schematic diagrams of the corner kit of the embodiment of the utility model;

[0024] Figure 4 This is the second three-dimensional schematic diagram of the corner kit of the embodiment of the utility model;

[0025] Figure 5 It is a three-dimensional schematic diagram of a scraper according to an embodiment of the utility model;

[0026] Figure 6 It is a three-dimensional schematic diagram of a connector according to an embodiment of the utility model;

[0027] Figure 7 It is a three-dimensional schematic diagram of the height positioning platform of the embodiment of the utility model.

[0028] Meaning of reference numerals in the figure:

[0029] 1-building block; 2-fixer; 201-strip hole; 202-fixing screw; 203-ram nut; 204-sleeve; 205-double-head screw; 206-side plate; 207-vertical plate; 208-upper plate; 209-lower plate; 3-scraper; 301-square rod; 302-limiting block; 303-connector; 304-groove; 305-annular convex edge; 306-threaded rod; 307-third concave surface; 308-second concave surface; 309-first concave surface; 310-scrape the side surface; 4-height positioning platform; 401-step; 402-notch; 403-screw connection hole. DETAILED DESCRIPTION

[0030] The utility model is further described below in conjunction with embodiments.

[0031] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0033] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0034] Example:

[0035] like Figures 1 to 7 The sample preparation device for preparing a mortar tensile bond strength test piece according to this embodiment is shown, which includes a fixture 2, two height positioning platforms 4 and a scraper 3.

[0036] The fixing device 2 is used to lock on the top of the building block 1. The building block 1 can be a standard building block or a non-standard building block. Two height positioning platforms 4 are symmetrically fixed on the two sides of the fixing device 2. The two height positioning platforms 4 are also located on the two sides of the building block 1. There are multiple steps 401 on the height positioning platform 4. The number of steps 401 is set according to the range of height adjustment. The steps 401 gradually increase from the inside to the outside of the height positioning platform 4. The inside of the height positioning platform 4 is the side close to the building block 1 when in use. Figure 7 As shown, in this embodiment, ten steps 401 are provided, each step 401 has a height of 1 mm, and all steps 401 have the same width, which is d. Both ends of the scraper 3 are used to support on the steps 401, and the distance between the bottom of the scraper 3 and the upper surface of the block 1 is adjusted by supporting on different steps 401, and then the scraper 3 is used to reciprocate and scrape the mortar on the upper surface of the block 1 to obtain mortar of a set thickness.

[0037] like Figure 2 As shown, the fixer 2 includes four corner kits and four screw assemblies. The four corner kits are respectively used to be mounted on the four corners of the upper side of the building block 1. The screw assemblies are used to connect and lock the adjacent corner kits. The connection of the screw assemblies forms a square frame shape, which can be mounted on the upper side of the building block 1 and tightened. The height positioning platform 4 is fixed between two of the corner kits and is located on both sides.

[0038] The specific structure is: Figures 2 to 4 As shown, the corner kit is provided with a side plate 206, a vertical plate 207, an upper flat plate 208 and a lower flat plate 209. When in use, a portion of the side plate 206 is flush with the side surface of the building block 1, the vertical plate 207 is vertically connected to the middle of the side plate 206, the upper flat plate 208 is arranged on one side of the vertical plate 207, the upper flat plate 208 is perpendicular to the side plate 206 and the vertical plate 207, the cavity surrounded by the upper flat plate 208, the side plate 206 and the vertical plate 207 is used to be sleeved on the corner of the building block 1, the lower flat plate 209 is arranged on the bottom of the other side of the vertical plate 207, and the lower flat plate 209 is used to support the end of the height positioning platform 4. The screw assembly includes a double-headed screw 205 and a ram nut 203. Horizontal sleeves 204 are respectively provided on the outer side surfaces of the side plate 206 and the outer side surfaces of the vertical plate 207. The end of the double-headed screw 205 passes through the sleeve 204. The ram nut 203 is threadedly connected to the part of the double-headed screw 205 that passes through the sleeve 204. By tightening the ram nut 203, the adjacent corner kits can be connected and locked.

[0039] In this embodiment, a strip hole 201 is provided on the side plate 206 , and a fixing screw 202 is passed through the strip hole 201 . The fixing screw 202 is threadedly connected to the threaded connection hole 403 on the end surface of the height positioning platform 4 , thereby fixing the end of the height positioning platform 4 and the side plate 206 together.

[0040] The bottom of the height positioning platform 4 of this embodiment is provided with a notch 402 for avoiding the double-headed screw 205 , so that the installation position of the height positioning platform 4 can be prevented from being affected by the double-headed screw 205 when in use.

[0041] like Figure 5 As shown, the scraper 3 includes a square rod 301, at least two stoppers 302 and two connectors 303, the ends of the connectors 303 are fixed with threaded rods 306, the two connectors 303 are respectively connected to the threaded holes at the two ends of the square rod 301 through the threaded rods 306, the middle of the stopper 302 is provided with a through hole, the stopper 302 is connected between the connector 303 and the square rod 301, and the threaded rod 306 passes through the through hole. The stopper 302 is used to adjust the overall length of the scraper 3. According to the required length, the stopper 302 may not be installed, or one, two or more stoppers 302 may be installed at both ends.

[0042] The square rod 301 of this embodiment is a square metal rod, and thus has four flattened side surfaces 310, which are planes for flattening the mortar on the block 1. The connector 303 is also a square block, and three of the side surfaces of the connector 303 are respectively provided with concave surfaces of different depths aligned with the flattened side surfaces, that is, there are three concave surfaces, namely, the first concave surface 309, the second concave surface 308 and the third concave surface 307, and the last side surface of the connector is not provided with a concave surface, but is a plane. Figure 6 As shown, the first concave surface 309 has a depth of 3 mm and a length of 3 d, the second concave surface 308 has a depth of 2 mm and a length of 2 d, and the third concave surface 307 has a depth of 1 mm and a length of 1 d. The concave surface is parallel to the scraping side surface 310, and the connector 303 is supported on the step 401 by its side surface or concave surface. By supporting the step 401 by different surfaces, the distance between the bottom of the scraper 3 and the upper surface of the block 1 can also be adjusted, and the adjustment is convenient.

[0043] In this embodiment, a groove 304 is provided at the end edge of the square rod 301, and an annular flange 305 is provided at the end edge of the limiting block 302. The limiting block 302 is fitted on the groove 304 through the annular flange 305, so that the connection is more stable.

[0044] The use process of the sample preparation device of this embodiment is as follows:

[0045] First, place the building block 1 on a horizontal table and remove dust from the surface of the building block 1; then, put the four corner kits on the four corners of the upper surface of the building block 1 respectively, pass the double-headed screw 205 through the sleeve 204 on the corner kit and fix it with the horn nut 203; then, install the two height positioning platforms 4 on both sides of the fixture 2, and the two ends of the height positioning platform 4 are supported on the lower plate 209 respectively, and the fixing screws 202 are passed through the long holes 201 and connected to the screw connection holes 403 on the side of the height positioning platform 4, and tightened; then, according to the building block 1 The thickness of the mortar that needs to be scraped on the upper surface is determined by whether to install the limit block 302 in the scraper 3. The specific selection process is as follows: when the thickness of the mortar is less than or equal to 4mm, there is no need to install the limit block 302, and the connector 303 can be directly connected to the square rod 301; when the thickness of the mortar is greater than 4mm and less than or equal to 8mm, a limit block 302 needs to be installed between the connector 303 and the square rod 301; when the thickness of the mortar is 9mm or 10mm, two limit blocks 302 need to be installed between the connector 303 and the square rod 301. Finally, after the scraper 3 is assembled, according to the thickness of the mortar that needs to be scraped on the upper surface of the block 1, the scraper 3 is placed at the corresponding step 401 in the height positioning platform 4, and an appropriate amount of mortar is poured on the upper surface of the block 1. The scraper 3 is moved back and forth horizontally to evenly cover the mortar on the upper surface of the block 1.

[0046] The above-mentioned embodiments of the utility model are not intended to limit the protection scope of the utility model, and the implementation methods of the utility model are not limited to these. All other various forms of modifications, replacements or changes made to the above-mentioned structure of the utility model based on the above-mentioned contents of the utility model, in accordance with the common technical knowledge and customary means in the field, without departing from the above-mentioned basic technical ideas of the utility model, should fall within the protection scope of the utility model.

Claims

1. A sample preparation device for preparing mortar tensile bond strength test pieces, characterized in that: It includes a fixture, two height positioning platforms and a scraper. The fixture is used to lock on the top of the building block. The two height positioning platforms are symmetrically fixed on both sides of the fixture. The height positioning platform is provided with a plurality of steps. The steps gradually increase from the inside to the outside of the height positioning platform. The two ends of the scraper are used to support on the steps. The distance between the bottom of the scraper and the upper surface of the building block can be adjusted by supporting on different steps.

2. The sample preparation device for preparing a mortar tensile bond strength test piece according to claim 1, characterized in that: The scraper includes a square rod and two connecting heads, the ends of the connecting heads are provided with threaded rods, the two connecting heads are respectively connected to the threaded holes at both ends of the square rod through the threaded rods, the square rod is provided with multiple scraping side surfaces, and the side surfaces of the connecting heads are provided with multiple concave surfaces of different depths aligned with the scraping side surfaces, and the connecting heads are supported on the steps through their side surfaces or concave surfaces.

3. The sample preparation device for preparing a mortar tensile bond strength test piece according to claim 2, characterized in that: The scraper comprises at least two limit blocks, a through hole is provided in the middle of the limit block, the limit block is connected between the connecting head and the square rod, and the threaded rod passes through the through hole.

4. The sample preparation device for preparing a mortar tensile bond strength test piece according to claim 1, characterized in that: The fixer includes four corner kits and four screw assemblies. The four corner kits are respectively used to be mounted on the four corners of the upper side of the building block. The screw assemblies are used to connect and lock adjacent corner kits. The height positioning platform is fixed between two of the corner kits.

5. The sample preparation device for preparing a mortar tensile bond strength test piece according to claim 4, characterized in that: The corner kit is provided with side panels, vertical panels, upper flat panels and lower flat panels, wherein the vertical panels are vertically connected to the middle of the side panels, the upper flat panel is arranged on one side of the vertical panel, and the upper flat panel is perpendicular to the side panels and the vertical panel, the cavity surrounded by the upper flat panel, the side panels and the vertical panel is used to be sleeved on the corner of the building block, the lower flat panel is arranged below the other side of the vertical panel, and the lower flat panel is used to support the end of the height positioning platform.

6. The sample preparation device for preparing a mortar tensile bond strength test piece according to claim 5, characterized in that: The end of the height positioning platform is also fixedly connected to the side plate via fixing screws.

7. The sample preparation device for preparing a mortar tensile bond strength test piece according to claim 5, characterized in that: The screw assembly includes a double-headed screw and a ram's horn nut. Horizontal sleeves are respectively provided on the outer side surfaces of the side plate and the outer side surfaces of the vertical plate. The ends of the double-headed screw pass through the sleeves, and the ram's horn nut is threadedly connected to the portion of the double-headed screw that passes through the sleeves.

8. The sample preparation device for preparing a mortar tensile bond strength test piece according to claim 7, characterized in that: A notch is provided at the bottom of the height positioning platform for avoiding the double-headed screw.

9. The sample preparation device for preparing a mortar tensile bond strength test piece according to claim 1, characterized in that: The height of each step is 1 mm, and the widths of all the steps are equal.

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