Device for testing adhesive property of cement mortar
By designing a bonding interface treatment mold with interface texture, the problems of difficult mold forming and cumbersome operation in traditional cement mortar testing were solved, and efficient and accurate bonding strength testing of new and old interfaces was achieved.
Patent Information
- Application Number
- CN202520330601.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-27
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-02-27
AI Technical Summary
Traditional cement mortar mechanical property testing experiments are difficult to conduct due to the challenges of forming bonding molds, complicated process steps, and difficulty in controlling the roughness of the bonding interface, which can easily lead to errors in the test results.
A cement mortar bonding performance testing device is designed, including a molding mold and a bonding interface treatment mold. The bonding interface treatment mold has an interface texture. An old sample with a specific interface texture is formed by inserting it into the rectangular groove of the molding mold. This simplifies the operation, reduces equipment and technical requirements, and avoids the risks associated with cutting and roughening.
This method achieves consistency in the interface condition of old samples, improves the accuracy and safety of the bonding strength test results between new and old interfaces, simplifies the operation process, and increases the efficiency of sample preparation.
Smart Images
Figure CN223796332U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the field of building material performance test, and relates to a device for testing the bonding performance of different treatment interface mortar and old interface, in particular to a cement mortar bonding performance testing device. BACKGROUND
[0002] Cement-based materials are widely used in civil engineering field and are one of the most used building materials. However, in the service process, cement-based materials are subjected to repeated actions of load, temperature, wheel rolling, etc., which can cause surface spalling, internal cracking and other deterioration problems, seriously affecting the structural safety and durability. How to effectively repair the pavement damage has become a hot issue of researchers. At present, applying repair mortar on the surface of damaged cement-based materials is a common reinforcement and reinforcement measure, and the bonding performance between the matrix and the repair mortar directly determines the repair quality and structural safety.
[0003] Bond strength is usually used to represent the bonding performance between new and old materials, and the bending bond is one of the common bond strength test methods. First, ordinary mortar specimens (40mm×40mm×160mm) are prepared, and after curing for 28d, the old specimens are cut from the middle; the bonding surface of the cut old specimen is brushed and cleaned, and then placed in the test mold, and fresh repair mortar is poured and vibrated to compact, and cured to the test age.
[0004] The bonding performance between new and old materials is affected by many factors such as interface roughness, bonding interface texture, etc. Indoor research usually obtains different interface conditions by brushing and chiseling the repair interface, which is a complicated process and is greatly affected by human factors, and cannot guarantee the consistency of the control test interface conditions, affecting the test results. In addition, the cutting process has certain danger, and the technical requirements for equipment and personnel are high. Cutting, chiseling and other processes may produce microcracks, affecting the stability of the interface and the test results. UTILITY MODEL CONTENTS
[0005] In order to solve the problems of the prior art, the utility model provides a cement mortar bonding performance testing device, which solves the problems of high difficulty in forming the bonding test mold in the traditional cement mortar mechanical property detection experiment process, complicated process operation steps, difficulty in controlling the bonding interface roughness and easy to cause errors in the detection results.
[0006] The utility model realizes the following technical schemes:
[0007] A cement mortar bonding performance testing device includes: a molding mold and a bonding interface treatment mold; the molding mold has a rectangular groove surrounded by a first side wall, a second side wall, a third side wall, and a fourth side wall, with the first side wall facing the third side wall and the second side wall facing the fourth side wall; the bonding interface treatment mold has a first side surface, a second side surface, a third side surface, and a fourth side surface, with the first side surface facing the third side surface and the second side surface facing the fourth side surface; the bonding interface treatment mold can be inserted into the rectangular groove of the molding mold, the lengths of the first and third side surfaces of the bonding interface treatment mold are less than the lengths of the first and third side walls of the rectangular groove on the molding mold, the lengths of the second and fourth side surfaces of the bonding interface treatment mold match the lengths of the second and fourth side walls of the rectangular groove on the molding mold, and at least one of the second and fourth side surfaces of the bonding interface treatment mold is provided with an interface texture.
[0008] Preferably, the second and fourth sides of the bonding interface treatment mold are provided with interface textures.
[0009] Furthermore, the interface textures on the second and fourth sides of the bonding interface treatment mold may be the same or different.
[0010] Preferably, the interface texture is a grid or parallel lines.
[0011] Preferably, it also includes a fixing module, which is used to fix the bonding interface treatment mold when the bonding interface treatment mold is inserted into the molding mold.
[0012] Furthermore, a sliding groove fixing block is connected to the top of the bonding interface treatment mold, and a sliding groove is provided at the bottom of the fixing module. The sliding groove fixing block cooperates with the sliding groove at the bottom of the fixing module for fixation.
[0013] Furthermore, the molding die, the bonding interface treatment die, and the slide groove fixing block are all made of iron, and the two sides of the slide groove on the fixing module are magnets.
[0014] Furthermore, the longitudinal section of the groove fixing block is trapezoidal, and the upper base of the trapezoid is connected to the bonding interface treatment mold.
[0015] Preferably, the molding die includes a plurality of rectangular grooves arranged in parallel and connected together.
[0016] Furthermore, the molding die includes three rectangular grooves arranged in parallel and connected together.
[0017] Compared with the prior art, the present invention has the following beneficial effects:
[0018] In this utility model of cement mortar bonding performance testing device, the second and / or fourth sides of the bonding interface treatment mold have interface textures. During use, the bonding interface treatment mold is inserted into the center of the rectangular groove of the forming mold. The first and third sides of the bonding interface treatment mold are in sealed contact with the first and third sidewalls of the rectangular groove on the forming mold, respectively. Cement mortar is filled into the rectangular groove on the side of the bonding interface treatment mold with the interface texture, thus obtaining an old sample with a special interface texture. Therefore, this device can easily obtain old samples with the same interface texture, ensuring the consistency of the interface condition in the control test. It eliminates the need for cumbersome cutting operations, has low requirements for equipment and personnel skills, and avoids the risk of micro-cracks caused by cutting or roughening, ensuring interface stability and improving the accuracy of the bonding strength test results between new and old interfaces. This device not only forms a consistent textured interface condition, ensuring the accuracy of the test, but also provides convenience for users, making operation safer and more convenient.
[0019] Furthermore, the second and fourth sides of the bonding interface treatment mold are provided with interface textures. Therefore, the bonding interface treatment mold can be used to prepare two old samples with special interface textures at one time, which improves the efficiency of old sample preparation.
[0020] Furthermore, the interface textures on the second and fourth sides of the bonding interface treatment mold can be the same or different. When the interface textures on the second and fourth sides are different, the bonding interface treatment mold can be used to prepare two old samples with different interface textures at one time for bonding strength testing of different interface textures.
[0021] Furthermore, by setting a fixing module, the bonding interface treatment mold can be fixed when it is inserted into the molding mold, thus avoiding the phenomenon of unstable fixing or tilting of the bonding interface treatment mold.
[0022] Furthermore, the bonding interface treatment mold is fixed by magnets, a simple and easy-to-operate method.
[0023] Furthermore, the trapezoidal arrangement of the slide block can improve the connection between the slide block and the fixing module.
[0024] Furthermore, the molding die includes several parallel rectangular grooves connected together, which allows for the preparation of multiple old samples at one time, and the testing of three sets of new and old samples at one time, thereby improving testing efficiency. Attached Figure Description
[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0026] Figure 1 This is a front view of the bonding interface treatment mold and fixing module in Embodiment 1 of this utility model.
[0027] Figure 2 This is a right view of the bonding interface treatment mold and fixing module in Embodiment 1 of this utility model.
[0028] Figure 3 These are schematic diagrams of several different interface textures.
[0029] Figure 4 This is a schematic diagram of the molding die in Embodiment 1 of this utility model.
[0030] Figure 5 This is a schematic diagram of the bonding interface treatment mold inserted into a rectangular groove of the molding mold in Embodiment 1 of this utility model.
[0031] In the figure: 1 is the bonding interface treatment mold; 2 is the fixing module; 3 is the magnet; 4 is the slide groove fixing block; 5 is the interface texture; 6 is the molding mold; 7 is the rectangular groove; 8 is the first side wall; 9 is the second side wall; 10 is the third side wall; 11 is the fourth side wall; 12 is the first side; 13 is the second side; 14 is the third side; 15 is the fourth side. Detailed Implementation
[0032] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.
[0033] It should be noted that the process equipment or apparatus not specifically mentioned in the following embodiments are all conventional equipment or apparatus in the art.
[0034] It should be noted that the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. Furthermore, it should be noted that the terms "first," "second," etc., used in this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data used can be interchanged where appropriate so that the embodiments of this invention described herein can be implemented in orders other than those illustrated or described herein. The terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this 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 should not be construed as a limitation of this invention; in addition, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly, for example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements.
[0035] refer to Figure 1 and Figure 4 The cement mortar bonding performance testing device provided by this utility model includes: a molding mold 6 and a bonding interface treatment mold 1; the molding mold 6 has a rectangular groove 7, which is surrounded by a first side wall 8, a second side wall 9, a third side wall 10, and a fourth side wall 11, with the first side wall 8 and the third side wall 10 facing each other, and the second side wall 9 and the fourth side wall 11 facing each other; the bonding interface treatment mold 1 has a first side wall 12, a second side wall 13, a third side wall 14, and a fourth side wall 15, with the first side wall 12 and the third side wall 14 facing each other, and the second side wall 13 and the fourth side wall 15 facing each other. The surfaces 15 are opposite each other; the bonding interface treatment mold 1 can be inserted into the rectangular groove 7 of the molding mold 6, the lengths of the first side surface 12 and the third side surface 14 of the bonding interface treatment mold 1 are less than the lengths of the first side wall 8 and the third side wall 10 of the rectangular groove 7 on the molding mold 6, the lengths of the second side surface 13 and the fourth side surface 15 of the bonding interface treatment mold 1 match the lengths of the second side wall 9 and the fourth side wall 11 of the rectangular groove 7 on the molding mold 6, and at least one of the second side surface 13 and the fourth side surface 15 of the bonding interface treatment mold 1 is provided with an interface texture 5.
[0036] In use, the bonding interface treatment mold 1 is inserted into the middle of the rectangular groove 7 of the molding mold 6. The first side 12 and the third side 14 of the bonding interface treatment mold 1 are in sealed contact with the first side wall 8 and the third side wall 10 of the rectangular groove 7 on the molding mold 6, respectively. Cement mortar is filled into the rectangular groove 7 on the side of the bonding interface treatment mold 1 with the interface texture 5, and tamped evenly with a trowel. After molding and curing, and demolding and curing to the specified age, an old sample with a special interface texture 5 can be obtained. The old sample is placed into the rectangular groove 7 of the molding mold 6, and freshly mixed repair mortar is poured into the remaining space of the rectangular groove 7. It is then vibrated and tamped evenly with a trowel. When the specimen reaches the curing age, the bonding strength is tested.
[0037] Because the bonding interface treatment mold 1 with interface texture 5 is set, the old sample prepared has a special interface texture 5. The device can easily obtain old samples with the same interface texture 5, ensuring the consistency of the interface condition of the control test. It does not require cumbersome cutting operations, has low requirements for equipment and personnel skills, and has no risk of micro-cracks caused by cutting or roughening. It can ensure the stability of the interface and improve the accuracy of the bonding strength test results of the new and old interfaces.
[0038] In some embodiments of this invention, interface textures 5 are provided on both the second side 13 and the fourth side 15 of the bonding interface treatment mold 1. Therefore, two old samples with special interface textures 5 can be prepared at once using the bonding interface treatment mold 1, improving the efficiency of old sample preparation. Furthermore, the interface textures 5 on the second side 13 and the fourth side 15 of the bonding interface treatment mold 1 can be the same or different. When the interface textures 5 on the second side 13 and the fourth side 15 are different, two old samples with different interface textures 5 can be prepared at once using the bonding interface treatment mold 1 for bonding strength testing of samples with different interface textures 5.
[0039] In this invention, the interface texture 5 can use different texture shapes according to experimental needs, such as grid or parallel line shapes. Figure 3 ).
[0040] In some embodiments of this utility model, the cement mortar bonding performance testing device further includes a fixing module 2. The fixing module 2 is used to fix the bonding interface treatment mold 1 when it is inserted into the forming mold 6, so as to avoid the bonding interface treatment mold 1 from being unstable or tilting. Figure 5 ).
[0041] Specifically, in the embodiments of this utility model, a sliding groove fixing block 4 is connected to the top of the bonding interface treatment mold 1, and a sliding groove is provided at the bottom of the fixing module 2. The sliding groove fixing block 4 is fixed in cooperation with the sliding groove at the bottom of the fixing module 2.
[0042] More specifically, in this invention, both the bonding interface treatment mold 1 and the slide groove fixing block 4 are made of iron. Magnets 3 are located on both sides of the slide groove on the fixing module 2, thereby fixing the bonding interface treatment mold 1 through the magnetic attraction between the magnets 3 and the slide groove fixing block 4. Simultaneously, the forming mold 6 is also made of iron, and the magnets 3 on the fixing module 2 can attract the sidewalls of the forming mold 6, thus firmly fixing the bonding interface treatment mold 1.
[0043] In this utility model, the longitudinal section of the slide groove fixing block 4 is trapezoidal, and the upper base of the trapezoid is connected to the bonding interface treatment mold 1. The trapezoidal arrangement of the slide groove fixing block 4 can improve the connection between the slide groove fixing block 4 and the fixing module.
[0044] To further improve efficiency, the molding die 6 of this utility model adopts a three-part trial mold, that is, the molding die 6 includes three parallel rectangular grooves 7 connected together. Figure 4 This allows for the preparation of multiple old samples at once, and enables the testing of three sets of new and old samples simultaneously.
[0045] Example 1
[0046] refer to Figures 1-5 The cement mortar bonding performance testing device provided in this embodiment includes: a molding mold 6, a bonding interface treatment mold 1, and a fixing module 2; the molding mold 6 adopts a triple mold, including three parallel rectangular grooves 7 of 40mm×40mm×160mm connected together. The rectangular groove 7 is formed by a first sidewall 8, a second sidewall 9, a third sidewall 10, and a fourth sidewall 11. The first sidewall 8 is opposite to the third sidewall 10, and the second sidewall 9 is opposite to the fourth sidewall 11. The bonding interface treatment mold 1 has a first sidewall 12, a second sidewall 13, a third sidewall 14, and a fourth sidewall 15. The first sidewall 12 is opposite to the third sidewall 14, and the second sidewall 13 is opposite to the fourth sidewall 15. The bonding interface treatment mold 1 can be inserted into the rectangular groove 7 of the molding mold 6. The lengths of the first sidewall 12 and the third sidewall 14 of the bonding interface treatment mold 1 are less than the lengths of the first sidewall 8 and the third sidewall 10 of the rectangular groove 7 on the molding mold 6. The lengths of the second sidewall 13 and the fourth sidewall 15 of the bonding interface treatment mold 1 match the lengths of the second sidewall 9 and the fourth sidewall 11 of the rectangular groove 7 on the molding mold 6. An interface texture 5 is provided on the second sidewall 13 and the fourth sidewall 15 of the bonding interface treatment mold 1.
[0047] The top of the bonding interface treatment mold 1 is connected to a sliding groove fixing block 4, and the bottom of the fixing module 2 has a sliding groove. The sliding groove fixing block 4 cooperates with the sliding groove at the bottom of the fixing module 2 for fixation. Both the bonding interface treatment mold 1 and the sliding groove fixing block 4 are made of iron. Magnets 3 are located on both sides of the sliding groove on the fixing module 2. The bonding interface treatment mold 1 is fixed by the magnetic attraction between the magnets 3 and the sliding groove fixing block 4. The forming mold 6 is also made of iron. The magnets 3 on the fixing module 2 can attract the side wall of the forming mold 6, thereby firmly fixing the bonding interface treatment mold 1.
[0048] Specific usage process: Fix three bonding interface treatment molds 1 in the middle sections of three rectangular grooves 7 (40mm×40mm×160mm) using fixing modules; take ordinary mortar with the same composition and slowly add it to the rectangular grooves 7 on both sides of the bonding interface treatment mold 1, tamp it evenly with a trowel 15 times, and manually compact it 5 times. After molding and curing, remove the fixing modules when the initial strength has been formed. After 21 hours, demold and cure to the specified age to obtain six old samples (40mm×40mm×80mm) with special interface textures 5.
[0049] Example 2
[0050] Place the old sample obtained in Example 1 into one end of the rectangular groove 7 on the molding mold 6, and pour freshly mixed repair mortar into the other end, so that the side of the old sample with special interface texture 5 faces the freshly mixed repair mortar. Vibrate to form or tamp evenly with a trowel. When the specimen reaches the curing age, test the bonding strength between the old and new materials.
[0051] Example 3
[0052] The cement mortar bonding performance testing device in Example 3 is the same as that in Example 1. The bonding interface treatment mold 1 is fixed in the middle section of a rectangular groove 7 measuring 40mm × 40mm × 160mm. A standard-component ordinary mortar is taken and slowly poured into the rectangular groove 7 on one side of the bonding interface treatment mold 1. It is then tamped evenly 13 times with a trowel and manually compacted 5 times. After curing for 3 hours until the sample strength is initially formed, the bonding interface treatment mold 1 is removed. Freshly mixed repair mortar is then slowly poured into the opposite side of the sample, filling the rectangular groove 7. It is then tamped evenly 13 times with a trowel and manually compacted 5 times. After 24 hours, the sample is demolded and cured to the specified age for bonding strength testing.
[0053] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical specifications of the present utility model shall still fall within the scope of the technical solution of the present utility model.
Claims
1. A device for testing the bonding performance of cement mortar, characterized in that, include: A molding die (6) and a bonding interface treatment die (1); the molding die (6) has a rectangular groove (7) formed by a first sidewall (8), a second sidewall (9), a third sidewall (10) and a fourth sidewall (11), the first sidewall (8) being opposite to the third sidewall (10), and the second sidewall (9) being opposite to the fourth sidewall (11); the bonding interface treatment die (1) has a first sidewall (12), a second sidewall (13), a third sidewall (14) and a fourth sidewall (15), the first sidewall (12) being opposite to the third sidewall (14), and the second sidewall (13) being opposite to the fourth sidewall (15); the bonding interface The processing mold (1) can be inserted into the rectangular groove (7) of the molding mold (6). The lengths of the first side (12) and the third side (14) of the bonding interface processing mold (1) are less than the lengths of the first sidewall (8) and the third sidewall (10) of the rectangular groove (7) on the molding mold (6). The lengths of the second side (13) and the fourth side (15) of the bonding interface processing mold (1) match the lengths of the second sidewall (9) and the fourth sidewall (11) of the rectangular groove (7) on the molding mold (6). An interface texture (5) is provided on at least one of the second sidewall (13) and the fourth sidewall (15) of the bonding interface processing mold (1).
2. The cement mortar bonding performance testing device according to claim 1, characterized in that, Interface textures (5) are provided on the second side (13) and the fourth side (15) of the bonding interface treatment mold (1).
3. The cement mortar bonding performance testing device according to claim 2, characterized in that, The interface textures (5) on the second side (13) and the fourth side (15) of the bonding interface treatment mold (1) are the same or different.
4. The cement mortar bonding performance testing device according to claim 1, characterized in that, The interface texture (5) is either grid-shaped or parallel line-shaped.
5. The cement mortar bonding performance testing device according to claim 1, characterized in that, It also includes a fixing module (2) for fixing the bonding interface treatment mold (1) when the bonding interface treatment mold (1) is inserted into the molding mold (6).
6. The cement mortar bonding performance testing device according to claim 5, characterized in that, The top of the bonding interface treatment mold (1) is connected to a sliding groove fixing block (4), and the bottom of the fixing module (2) is provided with a sliding groove. The sliding groove fixing block (4) cooperates with the sliding groove at the bottom of the fixing module (2) for fixation.
7. The cement mortar bonding performance testing device according to claim 6, characterized in that, The molding mold (6), the bonding interface treatment mold (1) and the slide groove fixing block (4) are all made of iron, and the two sides of the slide groove on the fixing module (2) are magnets (3).
8. The cement mortar bonding performance testing device according to claim 7, characterized in that, The longitudinal section of the groove fixing block (4) is trapezoidal, and the upper base of the trapezoid is connected to the bonding interface treatment mold (1).
9. The cement mortar bonding performance testing device according to claim 1, characterized in that, The molding die (6) includes several rectangular grooves (7) arranged in parallel and connected together.
10. The cement mortar bonding performance testing device according to claim 9, characterized in that, The molding die (6) includes three rectangular grooves (7) arranged in parallel and connected together.