Anti-freezing asphalt pavement

Abstract

The utility model relates to the field of asphalt pavements, in particular to an anti-freezing asphalt pavement which comprises an asphalt layer, and the grating net is mounted below the asphalt layer and is used for resisting freezing and cracking. According to the anti-freezing asphalt pavement disclosed by the utility model, the asphalt layer, the grating net, the asphalt waterproof bonding layer, the modified asphalt concrete, the modified emulsified asphalt bonding layer and the high-modulus asphalt concrete are arranged, and stearic acid modified calcium sulfate whiskers and a silane coupling agent are added into the asphalt layer, so that the low-temperature performance of a mixture is not reduced; according to the anti-freezing asphalt pavement composition disclosed by the invention, the glass fiber grid is arranged below the asphalt layer and has low-temperature-resistant and anti-freezing effects, and meanwhile, polyvinyl alcohol and cellulose nanofibers are added into the modified emulsified asphalt bonding layer, so that the anti-freezing performance of the anti-freezing asphalt pavement composition is improved, and the anti-freezing performance of the anti-freezing asphalt pavement composition is improved. And through the mutual synergistic effect of the two components, the anti-freezing performance of the anti-freezing asphalt pavement composition is further improved.

Description

Technical Field

[0001] The utility model relates to the field of asphalt pavements, and particularly relates to an anti-freezing asphalt pavement. Background Technique

[0002] An asphalt pavement refers to various types of pavements paved by mixing mineral materials with road-use asphalt materials. The asphalt binder improves the ability of the granular materials used for paving to resist damage to the pavement caused by driving and natural factors, making the pavement flat, less dusty, waterproof, and durable. Therefore, asphalt pavements are a type of high-grade pavement most widely used in road construction.

[0003] After retrieval, a utility model thoracic closed drainage bottle with the publication number CN219332699U includes a liquid accumulation cavity and a pressure regulating cavity, which are separated by a partition. The top of the liquid accumulation cavity is provided with a thoracic water seal tube, the top of the pressure regulating cavity is provided with a pressure regulating tube and an air opening tube, a noise reduction plate is arranged in the pressure regulating cavity, the noise reduction plate fits the inner wall of the pressure regulating cavity, the noise reduction plate is a cuboid frame body, and noise reduction bodies are arranged in the hollow interior; a communication pipeline is arranged between the liquid accumulation cavity and the pressure regulating cavity. The pressure regulating cavity of this thoracic closed drainage bottle is provided with a noise reduction plate, which further reduces noise by preventing the explosion of bubbles.

[0004] For existing asphalt pavements, when the temperature is below zero degrees, the water infiltrating into the pavement freezes. The volume of the frozen water increases, causing frost heaving in the internal voids of the asphalt concrete. Under the influence of repeated freeze-thaw cycles, the voids in the asphalt concrete pavement increase violently, allowing more water to enter its interior, and causing phenomena such as aggregate loosening, particle dropping, and potholes in the internal asphalt mixture. However, the asphalt pavement in the above comparative case does not have anti-freezing function. Therefore, in an environment with a relatively low temperature for a long time, it is easy to cause cracking and loosening of the asphalt pavement.

[0005] Therefore, it is very necessary to invent an anti-freezing asphalt pavement to solve the above problems. Content of the Utility Model

[0006] The purpose of the utility model is to provide an anti-freezing asphalt pavement. By adding calcium sulfate whisker modified with stearic acid and silane coupling agent inside the asphalt layer, while not reducing the low-temperature performance of the mixture, the brittle point of the anti-freezing asphalt pavement composition can be reduced, and the anti-cracking performance can be improved, thereby improving the anti-freezing performance of the anti-freezing asphalt pavement composition. The fiberglass grid is arranged below the asphalt layer, which has the effect of resisting low temperature and freezing. At the same time, polyvinyl alcohol and cellulose nanofibers are added to the modified emulsified asphalt tack coat. Through the synergistic effect between the two, the anti-freezing performance of the anti-freezing asphalt pavement composition is further improved to solve the problems mentioned in the above background technique.

[0007] To achieve the above object, the present utility model provides the following technical solutions: An anti-freezing asphalt pavement, comprising an asphalt layer;

[0008] A grille net, installed below the asphalt layer, for anti-freezing and crack prevention. An asphalt waterproof bonding layer is provided below the grille net. A modified asphalt concrete is provided below the asphalt waterproof bonding layer. A modified emulsified asphalt tack coat is provided below the modified asphalt concrete. A high modulus asphalt concrete is provided below the modified emulsified asphalt tack coat. An anti-freezing layer is provided below the high modulus asphalt concrete;

[0009] An anti-freezing structure, provided below the anti-freezing layer, for anti-freezing. A cement stabilized graded crushed stone upper base is provided below the anti-freezing structure.

[0010] Preferably, the grille net includes a glass fiber grid, gaskets, and steel nails. The glass fiber grid is provided below the asphalt layer. Gaskets are installed above the glass fiber grid. Steel nails penetrate through the interiors of the gaskets.

[0011] Preferably, the anti-freezing structure includes isolation beams, connectors, anchor piles, an upper crushed stone filling layer, and a lower crushed stone filling layer. The isolation beams are all fixed below the anti-freezing layer. One side of the isolation beam is fixedly connected to a connector. Anchor piles are fixedly installed below the isolation beams. The outsides of the isolation beams are filled with the upper crushed stone filling layer and the lower crushed stone filling layer.

[0012] Preferably, dry cement is provided below the cement stabilized graded crushed stone upper base. A cement stabilized graded crushed stone lower base is provided below the dry cement. A cement stabilized graded crushed stone subbase is provided below the cement stabilized graded crushed stone lower base.

[0013] In the above technical solution, the technical effects and advantages provided by the present utility model are:

[0014] 1. Through the settings of the asphalt layer, grille net, asphalt waterproof bonding layer, modified asphalt concrete, modified emulsified asphalt tack coat, and high modulus asphalt concrete, by adding stearic acid modified calcium sulfate whiskers and silane coupling agent into the asphalt layer, while not reducing the low-temperature performance of the mixture, the brittle point of the anti-freezing asphalt pavement composition can be reduced, and the anti-cracking performance can be improved, thereby improving the anti-freezing performance of the anti-freezing asphalt pavement composition. The glass fiber grid is provided below the asphalt layer, having the effect of resisting low temperature and freezing. At the same time, polyvinyl alcohol and cellulose nanofibers are added into the modified emulsified asphalt tack coat. Through the synergistic effect between the two, the anti-freezing performance of the anti-freezing asphalt pavement composition is further improved;

[0015] 2. Through the settings of the anti-freezing layer and the anti-freezing structure, by using the upper gravel filling layer and the lower gravel filling layer filled between each isolation beam, the melting expansion and freezing contraction of the underlying base layer can be buffered, reducing the impact extrusion on the road surface. The anti-freezing layer is made of cement, and cement has certain anti-freezing properties, which can cope with the influence brought by the decrease of ground temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0017] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 is a schematic diagram of the asphalt layer structure of the present utility model;

[0019] Figure 3 is a schematic diagram of the grille net structure of the present utility model;

[0020] Figure 4 is a schematic diagram of the anti-freezing structure of the present utility model;

[0021] Figure 5 is a schematic diagram of the cement stabilized graded crushed stone base layer structure of the present utility model.

[0022] DESCRIPTION OF THE REFERENCE NUMERALS:

[0023] 1. Asphalt layer; 2. Grille net; 201. Fiberglass grille net; 202. Gasket; 203. Steel nail; 3. Asphalt waterproof bonding layer; 4. Modified asphalt concrete; 5. Modified emulsified asphalt tack coat; 6. High modulus asphalt concrete; 7. Anti-freezing layer; 8. Anti-freezing structure; 801. Isolation beam; 802. Connector; 803. Anchor pile; 804. Upper gravel filling layer; 805. Lower gravel filling layer; 9. Cement stabilized graded crushed stone upper base layer; 10. Dry cement; 11. Cement stabilized graded crushed stone lower base layer; 12. Cement stabilized graded crushed stone subbase layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the following will further introduce the present utility model in detail in conjunction with the drawings.

[0025] The present utility model provides an anti-freezing asphalt pavement as shown in Figures 1-5 including an asphalt layer 1;

[0026] The grille mesh 2 is installed below the asphalt layer 1 for frost resistance and crack prevention. An asphalt waterproof bonding layer 3 is provided below the grille mesh 2. A modified asphalt concrete 4 is provided below the asphalt waterproof bonding layer 3. A modified emulsified asphalt tack coat 5 is provided below the modified asphalt concrete 4. A high modulus asphalt concrete 6 is provided below the modified emulsified asphalt tack coat 5. An anti-freezing layer 7 is provided below the high modulus asphalt concrete 6;

[0027] An anti-freezing structure 8 is provided below the anti-freezing layer 7 for frost resistance. A cement stabilized graded crushed stone upper base course 9 is provided below the anti-freezing structure 8. By adding calcium sulfate whisker modified with stearic acid inside the asphalt layer 1, the brittle point of the anti-freezing asphalt pavement composition can be reduced and the crack resistance can be improved without reducing the low-temperature performance of the mixture, thereby improving the frost resistance of the anti-freezing asphalt pavement composition. The fiberglass grid 201 is arranged below the asphalt layer 1 and has the effect of resisting low temperature and frost. At the same time, polyvinyl alcohol and cellulose nanofibers are added to the modified emulsified asphalt tack coat 5, and through the synergistic effect between the two, the frost resistance of the anti-freezing asphalt pavement composition is further improved.

[0028] As Figure 1 、 Figure 2 and Figure 3 shown, the grille mesh 2 includes a fiberglass grid 201, gaskets 202, and steel nails 203. The fiberglass grid 201 is arranged below the asphalt layer 1. Gaskets 202 are installed above the fiberglass grid 201. Steel nails 203 penetrate through the gaskets 202. The fiberglass grid 201 itself not only has a certain low-temperature resistance, but also high temperature resistance, aging resistance, and corrosion resistance, thereby strengthening the strength of the asphalt layer 1.

[0029] As Figure 1 and Figure 4 shown, the anti-freezing structure 8 includes isolation beams 801, connectors 802, anchor piles 803, upper crushed stone filling layer 804, and lower crushed stone filling layer 805. The isolation beams 801 are all fixed below the anti-freezing layer 7. A connector 802 is fixedly connected to one side of the isolation beam 801. Anchor piles 803 are fixedly installed below the isolation beam 801. The outside of the isolation beam 801 is filled with the upper crushed stone filling layer 804 and the lower crushed stone filling layer 805. By using the upper crushed stone filling layer 804 and the lower crushed stone filling layer 805 filled between each isolation beam 801, the melting expansion and freezing contraction of the underlying base course can be buffered, and the impact extrusion on the road surface can be reduced.

[0030] As Figure 1 and Figure 5As shown, dry cement 10 is provided below the upper base course 9 of cement-stabilized graded crushed stone. Cement-stabilized graded crushed stone lower base course 11 is provided below dry cement 10. Cement-stabilized graded crushed stone subbase course 12 is provided below the cement-stabilized graded crushed stone lower base course 11. Dry cement 10 is between the upper base course 9 of cement-stabilized graded crushed stone and the lower base course 11 of cement-stabilized graded crushed stone, improving the overall strength.

[0031] The working principle of this utility model: First, the cement-stabilized graded crushed stone subbase course 12 and the cement-stabilized graded crushed stone lower base course 11 are laid on the bottom layer. Then, dry cement 10 is laid on the cement-stabilized graded crushed stone lower base course 11. Next, the upper base course 9 of cement-stabilized graded crushed stone is laid on dry cement 10, thereby strengthening the strength of the overall base course. After that, each isolation beam 801 is connected through connectors 802. Then, the anchor piles 803 below the isolation beam 801 are inserted into the upper base course 9 of cement-stabilized graded crushed stone. After that, the upper crushed stone filling layer 804 and the lower crushed stone filling layer 805 are filled with the isolation beam 801, which can buffer the melting expansion and freezing shrinkage of the underlying base course and reduce the impact and extrusion on the road surface. Then, the antifreeze layer 7 is poured on the antifreeze structure 8. The material of the antifreeze layer 7 is cement, and cement has certain antifreeze properties and can cope with the influence brought by the decrease in ground temperature. Next, the high-modulus asphalt concrete 6 is laid above the antifreeze layer 7. Then, the modified emulsified asphalt tack coat 5 is provided on the modified emulsified asphalt tack coat 5. Polyvinyl alcohol and cellulose nanofibers are added to the interior of the modified emulsified asphalt tack coat 5. Through the synergistic effect between the two, the antifreeze performance of the antifreeze asphalt pavement composition is further improved. After that, the asphalt waterproof bonding layer 3 and the modified asphalt concrete 4 are provided above the modified emulsified asphalt tack coat 5. Then, the fiberglass grid 201 is laid above, and it is fixed by driving steel nails 203 through the gaskets 202. The fiberglass grid 201 itself has the effect of being resistant to low temperature and frost. Finally, the asphalt layer 1 is laid on the top. Stearic acid-modified calcium sulfate whiskers and silane coupling agents are added to the interior of the asphalt layer 1, which can reduce the brittle point of the antifreeze asphalt pavement composition and improve the crack resistance without reducing the low-temperature performance of the mixture, thereby improving the antifreeze performance of the antifreeze asphalt pavement composition. Just like this, the use process of this antifreeze asphalt pavement is completed.

[0032] Only some exemplary embodiments of the present utility model have been described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present utility model, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present utility model.

Claims

1. A frost-resistant asphalt pavement, characterized in that: comprising an asphalt layer (1); A grille mesh (2) is installed below the asphalt layer (1) for anti-freezing and anti-cracking. An asphalt waterproof bonding layer (3) is provided below the grille mesh (2). A modified asphalt concrete (4) is provided below the asphalt waterproof bonding layer (3). A modified emulsified asphalt bonding layer (5) is provided below the modified asphalt concrete (4). A high modulus asphalt concrete (6) is provided below the modified emulsified asphalt bonding layer (5). An antifreeze layer (7) is provided below the high modulus asphalt concrete (6). An antifreeze structure (8) is arranged below the antifreeze layer (7) and is used for antifreeze. A cement-stabilized graded crushed stone upper base (9) is arranged below the antifreeze structure (8).

2. The antifreeze asphalt pavement according to claim 1, characterized in that: The grille net (2) comprises a glass fiber grid (201), a gasket (202), and a steel nail (203); the glass fiber grid (201) is arranged below the asphalt layer (1); a gasket (202) is installed above the glass fiber grid (201); and the gasket (202) is penetrated by a steel nail (203).

3. The antifreeze asphalt pavement according to claim 1, characterized in that: The antifreeze structure (8) comprises an isolation beam (801), a connecting piece (802), an anchor pile (803), an upper crushed stone filling layer (804), and a lower crushed stone filling layer (805); the isolation beam (801) is fixed below the antifreeze layer (7); one side of the isolation beam (801) is fixedly connected with the connecting piece (802); the bottom of the isolation beam (801) is fixedly installed with an anchor pile (803); and the outside of the isolation beam (801) is filled with an upper crushed stone filling layer (804) and a lower crushed stone filling layer (805).

4. The antifreeze asphalt pavement according to claim 1, characterized in that: Dry cement (10) is arranged below the cement-stabilized graded crushed stone upper base (9), a cement-stabilized graded crushed stone lower base (11) is arranged below the dry cement (10), and a cement-stabilized graded crushed stone subbase (12) is arranged below the cement-stabilized graded crushed stone lower base (11).

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