Method for testing polishing resistance of cement concrete pavement

Abstract

The invention relates to a method for testing the polishing resistance of a cement concrete pavement. The method for testing the polishing resistance of the cement concrete pavement comprises the following steps: blending fine aggregates with preset lithology and grading into cement mortar according to a preset proportion; the cavity wall of a forming cavity of the mold is pretreated, so that a surface texture forming area is formed; the cement mortar is poured into the forming cavity, demolding is carried out after curing is carried out for a preset duration, and a sample piece is formed; carrying out polishing treatment on the sample piece through a polishing machine; and measuring the anti-slip value of the sample piece. According to the method for testing the polishing resistance of the cement concrete pavement, multiple factors such as the surface texture of the surface mortar, the lithology and proportion of the fine aggregate and the like can be comprehensively considered, and the polishing resistance of the cement concrete pavement can be accurately evaluated.

Description

Technical Field

[0001] The present application relates to the technical field of anti-skid performance testing, and in particular to a method for testing the anti-polishing performance of cement concrete pavement. Background Art

[0002] Cement concrete pavement is widely used in road construction due to its excellent strength, durability and compression resistance. However, with the increase in traffic volume and load, the functional failure of cement concrete pavement has become an important problem that hinders its long life development. A large amount of engineering experience shows that the structural damage of the pavement is gradually reduced, and it is replaced by functional damage such as polishing and severe loss of anti-skid performance. These damages make it difficult for the pavement to provide sufficient friction for its interaction with the tire, seriously affecting the driving safety of vehicles. Therefore, accurate evaluation of the anti-polishing performance of cement concrete pavement is crucial to ensure driving safety. However, the anti-polishing performance of cement concrete pavement is related to multiple factors such as the surface texture of its surface mortar, fine aggregate lithology and proportion. At present, there is no standardized method to evaluate the anti-polishing performance of cement concrete pavement. Summary of the invention

[0003] Based on this, it is necessary to provide a test method for the anti-polishing performance of cement concrete pavement, which can comprehensively consider multiple factors such as the surface texture, fine aggregate lithology and proportion of the surface mortar, and more accurately evaluate the anti-polishing performance of cement concrete pavement.

[0004] A method for testing the anti-polishing performance of a cement concrete pavement, the method comprising:

[0005] Mixing cement mortar with fine aggregate of preset lithology and gradation according to preset proportion;

[0006] Pre-treating the cavity wall of the molding cavity of the mold to form a surface texture molding area;

[0007] pouring the cement mortar in the molding cavity, and demoulding after curing for a preset time to form a test piece;

[0008] Performing a polishing process on the sample piece by a polishing machine;

[0009] The anti-slip value of the test piece was measured.

[0010] In some embodiments, the pre-processing of the cavity wall of the molding cavity of the mold includes:

[0011] A roughened gasket or a grooved gasket is placed on the bottom wall of the forming cavity.

[0012] In some embodiments, the pre-processing of the cavity wall of the molding cavity of the mold includes:

[0013] A retarder is applied to the bottom wall of the forming cavity, and then coarse aggregate is laid on the bottom wall.

[0014] In some embodiments, when pouring the cement mortar in the forming cavity, a top space is reserved and a toughening member is placed in the top space.

[0015] In some embodiments, a surface of the toughening member on one side close to the cement mortar is configured with a concave-convex structure.

[0016] In some embodiments, the surface of the toughening member on one side close to the cement mortar is configured with the curved concave-convex structure.

[0017] In some embodiments, after the toughening member is placed in the top space, the mold is placed on a vibration table to vibrate the mold.

[0018] In some embodiments, after the sample is demoulded, a treatment layer for improving the anti-slip performance is laid on the surface of the sample.

[0019] In some embodiments, during the polishing process, the anti-slip value of the sample is measured at intervals of a first preset time.

[0020] In some embodiments, when the anti-slip values ​​measured multiple times within a second preset time period do not fluctuate beyond a preset range, the polishing process is stopped.

[0021] In the above-mentioned cement concrete pavement anti-polishing performance test method, during the cement mortar preparation process, the cement mortar is prepared according to the preset lithology and graded fine aggregates in a preset proportion. Therefore, fine aggregates of different lithology and grade and different proportions can be selected as needed to test the anti-polishing performance of the pavement when fine aggregates of different lithology and grade and different proportions are selected. The cavity wall of the mold forming cavity is pre-treated in advance and has a texture forming area. Therefore, after the cement mortar solidifies in the forming cavity, a surface texture will be formed in the area corresponding to the texture forming area to simulate the surface texture formed by the pavement during actual construction. After the sample is prepared, the sample is polished by a polishing machine to simulate the pavement wear process; by measuring the anti-skid value of the sample, the anti-polishing performance of the pavement can be more accurately evaluated. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of a mold that has not been pre-processed in an embodiment of the present application.

[0023] Figure 2 This is a schematic diagram of a mold after pretreatment in one embodiment of the present application.

[0024] Figure 3This is a schematic diagram of a roughened gasket in one embodiment of the present application.

[0025] Figure 4 This is a schematic diagram of a sample piece molded after a roughened gasket is laid in a molding cavity in one embodiment of the present application.

[0026] Figure 5 This is a schematic diagram of the mold after coarse aggregate is laid in the molding cavity in one embodiment of the present application.

[0027] Figure 6 This is a schematic diagram of a sample piece formed after coarse aggregate is laid in a forming cavity in one embodiment of the present application.

[0028] Figure 7 This is a schematic diagram of placing a toughening member in the top space of a mold in one embodiment of the present application.

[0029] Figure 8 Schematic diagram of a toughening member in one embodiment of the present application.

[0030] Fig. 9 FIG. 1 is a schematic diagram of a polishing machine in one embodiment of the present application.

[0031] Reference numerals:

[0032] 100, mold; 110, molding cavity; 111, surface texture molding area; 112, top space;

[0033] 200, roughened gasket;

[0034] 300, toughening member; 310, bump;

[0035] 400, specimen;

[0036] 500. polishing machine; 510. road wheel; 520. rubber wheel; 530. coarse abrasive storage hopper; 540. fine abrasive storage hopper; 550. water supply system; 560. load adjustment system. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0038] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does 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 application.

[0039] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0040] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0041] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0042] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0043] Cement concrete pavement is widely used in road construction due to its excellent strength, durability and compression resistance. However, with the increase in traffic volume and load, the functional failure of cement concrete pavement has become an important problem that hinders its long life development. A large amount of engineering experience shows that the structural damage of the pavement is gradually reduced, and it is replaced by functional damage such as polishing and severe loss of anti-skid performance. These damages make it difficult for the pavement to provide sufficient friction for its interaction with the tire, seriously affecting the driving safety of vehicles. Therefore, accurate evaluation of the anti-polishing performance of cement concrete pavement is crucial to ensure driving safety. However, the anti-polishing performance of cement concrete pavement is related to multiple factors such as the surface texture of its surface mortar, fine aggregate lithology and proportion. At present, there is no standardized method to evaluate the anti-polishing performance of cement concrete pavement.

[0044] Based on this, a method for testing the anti-polishing performance of a cement concrete pavement is provided in an embodiment of the present application, which can more comprehensively consider multiple factors such as the surface texture, fine aggregate lithology and proportion of the surface mortar, and more accurately evaluate the anti-polishing performance of the cement concrete pavement.

[0045] See also Figure 1 , Figure 2 , Figure 4 and Fig. 9 ,in, Figure 1 This is a schematic diagram of a mold in an embodiment of the present application when it has not been pre-treated; Figure 2 This is a schematic diagram of a mold after pretreatment in one embodiment of the present application; Figure 4 It is a schematic diagram of a sample piece formed after a roughened gasket is laid in a forming cavity in one embodiment of the present application; Fig. 9 This is a schematic diagram of a polishing machine in one embodiment of the present application. The method for testing the anti-polishing performance of a cement concrete pavement provided in one embodiment of the present application includes:

[0046] S100, preparing cement mortar by mixing fine aggregates of preset lithology and gradation according to preset proportions;

[0047] S200, pre-treating the cavity wall of the molding cavity 110 of the mold 100 to form a surface texture molding area 111;

[0048] S300, pouring cement mortar in the molding cavity 110, and demoulding after curing for a preset time to form a sample 400;

[0049] S400, performing a polishing process on the sample 400 by a polishing machine 500;

[0050] S500. Measure the anti-slip value (BPN) of the sample 400.

[0051] In the above-mentioned embodiment, the cement concrete pavement anti-polishing performance test method is that during the cement mortar preparation process, the cement mortar is prepared according to the preset lithology and graded fine aggregates in a preset ratio. Therefore, fine aggregates of different lithology and grade and different ratios can be selected as needed to test the anti-polishing performance of the pavement when fine aggregates of different lithology and grade and different ratios are selected. The cavity wall of the molding cavity 110 of the mold 100 is pre-treated in advance and has a texture forming area. Therefore, after the cement mortar solidifies in the molding cavity 110, a surface texture will be formed in the area corresponding to the texture forming area to simulate the surface texture formed by the pavement during actual construction. After the sample 400 is prepared, the sample 400 is polished by the polishing machine 500 to simulate the pavement wear process; the anti-skid value of the sample 400 is measured, so that the anti-polishing performance of the pavement can be more accurately evaluated.

[0052] Specifically, after the test piece 400 is demolded, the polished surface to be tested can be treated in the following ways: (1) clean the surface release agent and remove the floating slurry; (2) for the test piece that needs to be exposed, use sandpaper to wipe off the unhardened slurry on the polished surface; (3) for the test piece that needs to be paved with a treatment layer, it is necessary to lay the treatment layer on the polished surface. The specific content will be described in the subsequent embodiments.

[0053] In some embodiments, the lithology of the fine aggregate can be granite or limestone, etc. In some embodiments, the size of the fine aggregate can be 5 mm, 0.3 mm, or a range of 0.3-5 mm.

[0054] See also Figures 1 to 4 ,in, Figure 3 This is a schematic diagram of a roughened gasket in an embodiment of the present application. In some embodiments, in step S200, pre-treating the cavity wall of the molding cavity 110 of the mold 100 includes:

[0055] The roughened gasket 200 or the grooved gasket is placed on the bottom wall of the molding cavity 110 .

[0056] Specifically, before pouring, a roughened gasket 200 with a suitable roughness and shape and size is selected, and then laid on the bottom wall of the forming cavity 110, so as to form a surface texture forming area 111. Then, cement mortar is poured into the forming cavity 110. When the cement mortar solidifies, its bottom surface will form a shape corresponding to the surface texture forming area 111, thereby simulating the road surface morphology after roughening process, so as to facilitate the evaluation of the anti-polishing performance of such road surface.

[0057] Alternatively, before pouring, a grooved gasket with grooves on the surface is selected, cut into a shape and size matching the bottom wall of the forming cavity 110, and then laid on the bottom wall of the forming cavity 110 to form a surface texture forming area 111. Then, cement mortar is poured into the forming cavity 110. When the cement mortar solidifies, its bottom surface will form a shape corresponding to the surface texture forming area 111, thereby simulating the surface grooved road surface morphology, so as to facilitate the evaluation of the anti-polishing performance of such a road surface.

[0058] Alternatively, other types of gaskets may be selected and laid in the molding cavity 110 .

[0059] In the above embodiments, by selecting gaskets of different types and roughness, actual road surfaces of different forms can be simulated, thereby facilitating the subsequent evaluation of the anti-polishing performance of road surfaces of different forms. In addition, since the gasket is laid on the bottom wall of the molding cavity 110, it is not necessary to use a fixing piece to fix it. The cement mortar will compact the gasket under its own gravity, which can make the operation easier. Preferably, in some embodiments, in step S200, a release agent is applied to the roughened gasket 200 or the grooved gasket, and then it is placed on the bottom wall of the molding cavity 110. After the test piece 400 is demolded, the release agent on its surface needs to be cleaned off, the floating slurry is removed, and the polished surface to be tested is exposed.

[0060] In the above embodiment, by applying a release agent on the surface of the gasket, the sample 400 can be prevented from sticking to the gasket and being unable to be separated during demolding, thereby reducing the demolding difficulty of the sample 400. In addition, the gasket can be prevented from sticking to the bottom wall of the molding cavity 110 and being unable to be removed, thereby facilitating the reuse of the mold 100 after the gasket is removed.

[0061] See also Figure 1 , Figure 2 , Figure 5 and Figure 6 ,in, Figure 5 This is a schematic diagram of a mold after coarse aggregate is laid in a molding cavity in one embodiment of the present application; Figure 6 Schematic diagram of a sample formed after laying coarse aggregate in a forming cavity in an embodiment of the present application. In some embodiments, in step S200, pre-treating the cavity wall of the forming cavity 110 of the mold 100 includes:

[0062] A retarder is applied to the bottom wall of the forming cavity 110, and then coarse aggregate is laid on the bottom wall.

[0063] Specifically, after the retarder is applied to the bottom wall of the molding cavity 110, the coarse aggregate of suitable gradation and lithology is selected according to the needs and evenly laid on the bottom wall of the molding cavity 110, so as to form the surface texture molding area 111. Then, the cement mortar is poured into the molding cavity 110. When the cement mortar solidifies, the bottom surface of the sample 400 will be embedded with the coarse aggregate, so as to simulate the morphology of the exposed stone concrete pavement, so as to facilitate the evaluation of the anti-polishing performance of the pavement of this morphology. Because the retarder is applied to the bottom wall of the molding cavity 110 before the coarse aggregate is laid, the solidification speed of the cement mortar near the surface texture molding area 111 is slower after the cement mortar is poured. After demolding, the unsolidified surface cement mortar at the polished surface of the sample 400 (corresponding to the surface texture molding area 111) can be easily removed with sandpaper, so as to more thoroughly expose the coarse aggregate embedded in the bottom surface of the sample 400, so as to better simulate the morphology of the exposed stone concrete pavement.

[0064] See also Figure 1 , Figure 2 and Figure 7 ,in, Figure 7 Schematic diagram of placing a toughening member in the top space of a mold in an embodiment of the present application. In some embodiments, in step S300, when pouring cement mortar in the molding cavity 110, a top space 112 is reserved, and a toughening member 300 is placed in the top space 112.

[0065] Specifically, the toughening member 300 is made of a plastic material with good flexibility. When pouring cement mortar in the molding cavity 110, the cement mortar does not fill the molding cavity 110, and a top space 112 with a height of 1mm to 2mm is reserved. The toughening member 300 is placed in the space, and then demolded after curing for a preset time. Figure 4 and Figure 6 After demoulding, the toughening member 300 will be attached to the side of the sample 400 that is away from the polished surface.

[0066] In the above embodiment, the toughening member 300 is provided after pouring, so that after the cement mortar solidifies, the toughening member 300 is attached to the surface of the sample 400, thereby improving the overall toughness of the sample 400 and enhancing its fracture resistance. In addition, the toughening member 300 can also apply a certain pressure to the cement mortar, inhibiting the cement mortar from flowing during the solidification process and causing internal defects after solidification, so that the molding surface is flat and the force is evenly applied.

[0067] When pouring cement mortar in the molding cavity 110, a top space 112 is reserved and a toughening member 300 is placed, so that the molding surface of the specimen 400 is flat, the force is evenly applied, and the fracture resistance is enhanced.

[0068] See also Figure 1 , Figure 2 and Figure 8 ,in, Figure 8 Schematic diagram of a toughening member 300 in an embodiment of the present application. In some embodiments, a concave-convex structure is configured on the surface of the toughening member 300 close to the cement mortar. In this way, the concave-convex structure can increase the bonding strength between the toughening member 300 and the cement mortar after solidification, thereby preventing the two from separating.

[0069] Specifically, the concavo-convex structure may be a convex block 310 protruding outwardly on the surface of the self-toughening member 300. In other embodiments, the concavo-convex structure may be a concave groove on the surface of the self-toughening member 300.

[0070] Preferably, a surface of the toughening member 300 close to the cement mortar is constructed with a plurality of concave-convex structures arranged at intervals to further increase the bonding strength between the toughening member 300 and the cement mortar after solidification.

[0071] In some embodiments, a surface of the toughening member 300 close to the cement mortar is configured with a curved concave-convex structure.

[0072] Specifically, the shape of the concave-convex structure can be cylindrical or spherical, or other irregular curved shapes. When it is set to a curved surface, it can relieve stress concentration after molding, making it less likely to break.

[0073] In some embodiments, after placing the toughening member 300 in the top space 112, the mold 100 is placed on a vibration table, the mold 100 is vibrated, and then demolded after curing for a preset time. In this way, the cement mortar and the toughening member 300 can be in close contact based on the vibration liquefaction effect, further improving the bonding strength between the two.

[0074] See also Figure 1 and Figure 2 In some embodiments, in step S300, after the sample 400 is demolded, a treatment layer for improving the anti-slip performance is laid on the surface of the sample 400.

[0075] In actual construction, in order to enhance the anti-skid performance of the road surface, a treatment layer is usually laid on its surface. In the above embodiment, after the sample 400 is demoulded, a treatment layer is laid on its surface to simulate this road surface morphology, thereby facilitating the subsequent evaluation of the anti-polishing performance of this morphology of the road surface.

[0076] See also Figure 1 , Figure 2 and Figure 4In some embodiments, in step S400 and step S500, during the polishing process, the anti-slip value of the sample 400 is measured at intervals of a first preset time.

[0077] Specifically, the sample 400 is removed from the polishing machine 500 at intervals of one hour, and the anti-slip value is measured once, and compared with the total polishing time at this time, a more comprehensive evaluation is performed on the anti-polishing performance of the sample 400 under different polishing time conditions.

[0078] See also Figure 1 , Figure 2 and Figure 4 In some embodiments, in step S400, when the anti-slip values ​​measured multiple times within the second preset time period do not fluctuate beyond a preset range, the polishing process is stopped.

[0079] Specifically, when the anti-slip values ​​measured multiple times within the second preset time period do not fluctuate beyond the preset range, it means that the current sample 400 has reached the preset polishing degree. On the contrary, if the difference in the anti-slip values ​​measured multiple times is too large, it means that it has not been polished to the preset polishing degree and needs to be polished further. When the anti-slip values ​​measured multiple times fluctuate within the preset range, the polishing process is stopped, and the anti-slip value of the sample 400 is measured again, so that the anti-polishing performance of the sample 400 at the preset polishing degree can be evaluated.

[0080] In a specific embodiment, when the anti-slip value of the sample 400 measured multiple times within two hours fluctuates no more than ±3, the polishing process is stopped.

[0081] See also Figure 1 , Figure 4 and Fig. 9 In some embodiments, in step S400, the polishing process of the sample 400 by the polishing machine 500 includes:

[0082] A plurality of test pieces 400 are mounted on a road wheel 510 of a polishing machine 500 in a circumferential direction, and flexible gaskets are laid between the test pieces 400 and the road wheel 510 and between adjacent test pieces 400 .

[0083] Specifically, the polishing machine 500 can be an accelerated polishing machine in the prior art. Such a polishing machine 500 includes a road wheel 510 and a rubber wheel 520. During the polishing process, the sample 400 is clamped and fixed to the outer peripheral surface of the road wheel 510 by a clamping structure. The road wheel 510 and the rubber wheel 520 rotate in opposite directions, and a load is applied to the rubber wheel 520 by a load adjustment system 560, so that the rubber wheel 520 is pressed against the sample 400. Coarse abrasives are transported to the sample 400 through a coarse abrasive storage hopper 530, fine abrasives are transported to the sample 400 through a fine abrasive storage hopper 540, and water is transported to the sample 400 through a water supply system 550. When the road wheel 510 and the rubber wheel 520 rotate in opposite directions, the sample 400 can be polished to simulate the road wear process. When a load is applied to the rubber wheel 520 through the load adjustment system 560 , the degree to which the rubber wheel 520 is pressed against the sample 400 can be adjusted by adjusting the load weight, thereby simulating different wear speeds.

[0084] In the above embodiment, multiple test pieces 400 are installed on the road wheel 510 of the polishing machine 500 along the circumferential direction. Therefore, when the road wheel 510 and the rubber wheel 520 rotate in opposite directions, multiple test pieces 400 can be polished at the same time. Therefore, multiple different test pieces 400 simulating various types of roads can be installed on the road wheel 510 together to improve the test efficiency. In addition, laying a flexible gasket between the test piece 400 and the road wheel 510, and between adjacent test pieces 400, can prevent the test piece 400 from being easily broken or loosened during the polishing process, so as to improve the polishing quality and further improve the measurement accuracy.

[0085] See also Figure 1 , Figure 2 and Figure 4 In some embodiments, in step S400, the polishing process of the sample 400 by the polishing machine 500 includes:

[0086] When the number of the test pieces 400 to be polished is insufficient, the scrapped test pieces 400 are installed in the vacant positions of the road wheel 510 .

[0087] Specifically, as mentioned above, a plurality of test pieces 400 are installed on the road wheel 510 of the polishing machine 500 along the circumferential direction. In order to improve the running stability of the road wheel 510 during polishing, it is usually necessary to cover the outer circumference of the road wheel 510 with test pieces 400. If the number of test pieces 400 that need to be polished is insufficient and cannot cover the outer circumference of the road wheel 510, the scrapped test pieces 400 that have been measured can be installed in the vacant positions on the outer circumference of the road wheel 510 to cover the outer circumference of the road wheel 510, thereby ensuring the running stability, improving the polishing quality, and further improving the measurement accuracy.

[0088] It is understandable that the size of the sample 400 must match the size of the outer circumference of the road wheel 510 to ensure that the sample 400 can be stably installed and not easily loosened. Therefore, the size of the molding cavity 110 of the mold 100 needs to match the size of the outer circumference of the road wheel 510. For example, in some embodiments, the mold 100 is designed to be a longitudinally curved arc with an outer side curvature radius of 203±1.5mm, an arc length of 90.6+0.5mm, a width of 44.5±0.5mm, and a thickness of 16±0.5mm.

[0089] See also Figure 1 , Figure 2 and Figure 4 In some embodiments, in step S400, the polishing process of the sample 400 by the polishing machine 500 includes:

[0090] S410, grinding the sample 400 using a coarse abrasive;

[0091] S420, grinding the sample 400 using fine abrasive.

[0092] Specifically, the sample 400 is first polished for a period of time using a coarse abrasive with a larger particle size to remove the floating slurry on the surface of the sample 400 and expose the coarse and fine aggregates. Then, the sample 400 is polished for a period of time using a fine abrasive with a smaller particle size to smooth the surface of the sample 400, so as to facilitate the subsequent measurement of its anti-slip value and the evaluation of its anti-polishing performance.

[0093] In a specific embodiment, in S410, No. 30 brown corundum is selected as the coarse abrasive, and water is added to the coarse abrasive for coarse grinding. The flow rate of the coarse abrasive is 27-50g / min, the flow rate of water is 27-50g / min, and the total load applied to the rubber wheel 520 is 725N±10N, and it is kept constant during the polishing process. The coarse grinding process lasts for 2-4h.

[0094] In a specific embodiment, in S420, 380# green silicon carbide is selected as the fine abrasive, and the fine abrasive is added with water for fine grinding, the flow rate of the fine abrasive is 2-4 g / min, the flow rate of water is 4-8 g / min, and the fine sand polishing process lasts for 2-4 hours.

[0095] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0096] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A method for testing the anti-polishing performance of cement concrete pavement, characterized in that: The cement concrete pavement anti-polishing performance testing method comprises: Mixing cement mortar with fine aggregate of preset lithology and gradation according to preset proportion; Pre-treating the cavity wall of the molding cavity of the mold to form a surface texture molding area; pouring the cement mortar in the molding cavity, and demoulding after curing for a preset time to form a test piece; Performing a polishing process on the sample piece by a polishing machine; The anti-slip value of the test piece was measured.

2. The method for testing the anti-polishing performance of cement concrete pavement according to claim 1, characterized in that: The pretreatment of the cavity wall of the molding cavity of the mold comprises: A roughened gasket or a grooved gasket is placed on the bottom wall of the forming cavity.

3. The method for testing the anti-polishing performance of cement concrete pavement according to claim 1, characterized in that: The pretreatment of the cavity wall of the molding cavity of the mold comprises: A retarder is applied to the bottom wall of the forming cavity, and then coarse aggregate is laid on the bottom wall.

4. The method for testing the anti-polishing performance of cement concrete pavement according to claim 1, characterized in that: When pouring the cement mortar in the molding cavity, a top space is reserved, and a toughening member is placed in the top space.

5. The method for testing the anti-polishing performance of cement concrete pavement according to claim 4, characterized in that: A surface of one side of the toughening component close to the cement mortar is configured with a concave-convex structure.

6. The method for testing the anti-polishing performance of cement concrete pavement according to claim 5, characterized in that: The surface of the toughening component on one side close to the cement mortar is constructed with the curved concave-convex structure.

7. The method for testing the anti-polishing performance of cement concrete pavement according to claim 5, characterized in that: After the toughening member is placed in the top space, the mold is placed on a vibration table to vibrate the mold.

8. The method for testing the anti-polishing performance of cement concrete pavement according to claim 1, characterized in that: After the sample is demoulded, a treatment layer for improving the anti-slip performance is laid on the surface of the sample.

9. The method for testing the anti-polishing performance of cement concrete pavement according to any one of claims 1 to 8, characterized in that: During the polishing process, the anti-slip value of the sample is measured at intervals of a first preset time.

10. The method for testing the anti-polishing performance of cement concrete pavement according to claim 9, characterized in that: When the anti-slip values ​​measured multiple times within the second preset time period fluctuate within a preset range, the polishing process is stopped.

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