Silent drainage ultra-thin asphalt overlay construction structure

Abstract

The utility model relates to the technical field of asphalt overlay construction, and discloses a silence type drainage ultrathin asphalt overlay construction structure which comprises an ultrathin asphalt overlay, an overlay additional paving road section, an adjacent road section and a transition section arranged between the overlay additional paving road section and the adjacent road section. According to the present invention, the tack coat can be sprayed on the milled and roughened pavement through the high-pressure atomization spraying vehicle during the construction, such that the tack coat can be rapidly bonded with the inside so as to achieve the certain waterproof effect, and the diluted non-emulsified tack coat is adopted as the tack coat, and is different from the conventional emulsified asphalt tack coat so as to achieve the waterproof effect; after spreading construction, construction equipment can immediately enter a working face for construction, demulsification time does not need to be waited, mixture spreading can be conducted through a spreading machine after sticking layer oil is spread, construction can be completed only through static pressure of a road roller after spreading is completed, the construction process is fast and efficient, the anti-skid performance and noise reduction performance of a road surface are improved, and the construction efficiency is improved. And the driving comfort is obviously improved.

Description

Technical Field

[0001] The utility model patent relates to the technical field of asphalt overlay construction, and specifically, to a silent drainage ultra-thin asphalt overlay construction structure. Background Art

[0002] In recent years, due to the sharp increase in overloaded and heavy-loaded vehicles and traffic flow, although the pavement structure of most of the roads built in the early days is intact, the pavement's anti-skid performance, flatness, comfort and other performance have been greatly reduced. Some even cannot meet the use requirements, and there are major safety hazards. For this reason, the usual practice is to add a layer of asphalt concrete overlay to restore its surface function.

[0003] The construction efficiency of conventional asphalt overlay is average, and the driving comfort is also average. Utility Model Content

[0004] The utility model aims to provide a silent drainage ultra-thin asphalt overlay construction structure, aiming to solve the problems in the prior art that the asphalt overlay construction efficiency is average and the road use function is average.

[0005] The utility model is implemented as follows: a silent drainage ultra-thin asphalt overlay construction structure comprises an ultra-thin asphalt overlay, an overlay paved section, an adjacent section and a transition section arranged between the overlay paved section and the adjacent section, the ultra-thin asphalt overlay is composed of a tack coat oil and a mixture, the mixture is laid on top of the tack coat oil, the surface of the overlay paved road surface needs to be milled and roughened, the tack coat oil is spread on the milled and roughened paved road surface, the milling surface in the transition section has a certain angle, and the tack coat oil and the ultra-thin asphalt overlay are arranged on the top of the milling surface in the transition section in sequence, the ultra-thin asphalt overlay adopts high-viscosity SBS modified asphalt as an asphalt binder, and the grading design adopts an open-graded mixture.

[0006] Preferably, the transition section is arranged at the joint between the front and rear ends of the overlay paving section and the adjacent road surface, and the length of the transition section is 5-8m.

[0007] Preferably, the milling and roughening depth of the overlay paving section and the transition section is 1 cm, and the thickness of the ultra-thin asphalt overlay is 1.5 cm.

[0008] Preferably, the tack coat oil is a diluted asphalt-based non-emulsified tack coat oil, and the spreading amount of the tack coat oil per square meter is 0.2-0.25 kg.

[0009] Preferably, the tack coat oil is in a liquid flow state at room temperature and is spread by a high-pressure atomizing spreader.

[0010] Preferably, the loose laying coefficient of the mixture is 1.1, and the loose laying thickness is 1.6-1.7 cm.

[0011] Preferably, the mixture needs to be compacted after loose spreading, and the compaction thickness is 1.5 cm.

[0012] Preferably, the discharge temperature of the mixture is 180-190°C, and the paving temperature is not less than 170°C.

[0013] Preferably, the milling surface in the transition section extends obliquely downward toward the adjacent road section, the highest point of the transition section is in the same horizontal plane as the top surface of the overlay section, and the lowest point of the transition section is in the same horizontal plane as the adjacent road surface.

[0014] Preferably, the measured value of the anti-skid property of the ultra-thin asphalt overlay is 65, and the water permeability coefficient is 1560 ml / min.

[0015] Compared with the prior art, the silent drainage ultra-thin asphalt overlay construction structure provided by the utility model has an ultra-thin asphalt overlay composed of tack coat oil and a mixture. During construction, the tack coat oil can be spread on the milled and roughened road surface by a high-pressure atomizing spreader, so that the tack coat oil can quickly bond with the inside and have a certain waterproof effect. Moreover, since the tack coat oil adopts a diluted non-emulsified tack coat oil, which is different from the traditional emulsified asphalt bonding layer, the construction equipment can immediately enter the working surface for construction after the spreading construction without waiting for the demulsification time. After the tack coat oil is spread, the mixture can be spread by a paver. After the spreading is completed, the construction can be completed by static pressure of a roller. The construction process is quick and efficient, and the anti-skid and noise reduction properties of the road surface are improved, and the driving comfort is significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the transition section structure of the silent drainage ultra-thin asphalt overlay construction structure provided by the utility model;

[0017] Figure 2 It is a structural schematic diagram of the ultra-thin asphalt overlay of the silent drainage ultra-thin asphalt overlay construction structure provided by the utility model.

[0018] Description of reference numerals:

[0019] 1. Overlay section; 2. Adjacent road section; 3. Transition section; 4. Ultra-thin asphalt overlay; 5. Tack coat oil; 6. Mixture. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0021] The implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0022] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present utility model, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0023] Reference Figure 1-2 As shown, it is a preferred embodiment provided by the utility model.

[0024] The construction structure of the silent drainage ultra-thin asphalt overlay 4 includes an ultra-thin asphalt overlay 4, an overlay paving section, an adjacent road section 2, and a transition section 3 located between the overlay paving section and the adjacent road section 2. The ultra-thin asphalt overlay 4 is composed of a tack coat 5 and a mixture 6. The mixture 6 is laid on the top of the tack coat 5. The surface of the overlay paving road surface needs to be milled and roughened. The tack coat 5 is sprinkled on the overlay road surface after milling and roughening. The milling surface in the transition section 3 has a certain angle, and the tack coat 5 and the ultra-thin asphalt overlay 4 are arranged on the top of the milling surface in the transition section 3 in sequence. The ultra-thin asphalt overlay 4 uses high-viscosity SBS modified asphalt as an asphalt binder, and the grading design uses an open-graded mixture 6. Since the high-viscosity asphalt and the open-graded design reinforce each other, a rich surface structure and relatively large internal pores are formed. The rate can improve the water film phenomenon of dense-graded asphalt pavement and reduce the formal noise of the original pavement. Compared with traditional asphalt pavement, it can reduce traffic noise by 3 to 5 decibels, and compared with traditional cement concrete pavement, it can reduce traffic noise by 4 to 6 decibels. In the vehicle environment, 4 layers of silent drainage ultra-thin asphalt overlay can reduce noise by 3.2dB compared with SMA-13 ​​pavement, and 4.5dB compared with traditional AC-13 pavement; in the vehicle environment, 4 layers of silent drainage ultra-thin asphalt overlay can reduce noise by 4.3dB compared with SMA-13 ​​pavement, and 5.9dB compared with traditional AC-13 pavement. It can significantly improve the road driving environment, and after the construction is completed, the road surface structure is rich in texture and the friction coefficient is greatly improved compared with the original pavement layer.

[0025] The ultra-thin asphalt overlay 4 composed of tack coat oil 5 and mixture 6 can be spread with tack coat oil 5 on the milled and roughened road surface through a high-pressure atomizing spreader during construction, so that the tack coat oil 5 can quickly adhere to the inside and have a certain waterproof effect. In addition, since the tack coat oil 5 adopts a diluted non-emulsified tack coat oil 5, which is different from the traditional emulsified asphalt bonding layer, the construction equipment can immediately enter the working surface for construction after the spreading construction, and there is no need to wait for the demulsification time. After the tack coat oil 5 is spread, the mixture 6 can be spread by a paver. After the spreading is completed, the construction can be completed by static pressure of a roller. The construction process is fast and efficient, and the anti-skid and noise reduction properties of the road surface are improved, which significantly improves the driving comfort.

[0026] Specifically, in this embodiment, the transition section 3 is arranged at the joint between the front and rear ends of the overlay paving section and the adjacent road surface. The length of the transition section 3 is 5-8m. Through the setting of the transition section 3, it can be ensured that the road surface after paving is connected with the original road surface, ensuring driving comfort.

[0027] Specifically, in this embodiment, the milling and roughening depth of the overlay paving section and the transition section 3 is 1 cm, and the thickness of the ultra-thin asphalt overlay 4 is 1.5 cm.

[0028] Specifically, in the present embodiment, the tack coat oil 5 is a diluted asphalt non-emulsified tack coat oil 5, and the spreading amount of the tack coat oil 5 per square meter is 0.2-0.25 kg. The tack coat oil 5 is in a liquid flow state at room temperature, and a high-pressure atomizing spreader is used for spreading construction. When the local spreading is too large, it can be adsorbed with sawdust and fine sand and then cleaned. After the spreading is completed, there is no need to wait for demulsification to be carried out before paving operations, which significantly improves the construction efficiency.

[0029] Specifically, in this embodiment, the loose laying coefficient of the mixture 6 is 1.1, the loose laying thickness is 1.6-1.7 cm, the mixture 6 needs to be compacted after loose laying, the compacted thickness is 1.5 cm, the discharge temperature of the mixture 6 is 180-190°C, and the paving temperature is not lower than 170°C.

[0030] Specifically, in the present embodiment, the milling surface in the transition section 3 extends downwardly and obliquely toward the adjacent road section 2, the highest point of the transition section 3 is at the same horizontal plane as the top surface of the overlay section 1, and the lowest point of the transition section 3 is at the same horizontal plane as the adjacent road surface, so that a good transition is made between the overlay section 1 and the adjacent road section 2, reducing the sense of road sectionness and ensuring driving comfort.

[0031] Specifically, in this embodiment, the measured value of the anti-skid property of the ultra-thin asphalt overlay 4 is 65, and the water permeability coefficient is 1560 ml / min.

[0032] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Silent drainage ultra-thin asphalt overlay construction structure, characterized by: It includes an ultra-thin asphalt overlay, an overlay paved section, an adjacent section and a transition section between the overlay paved section and the adjacent section, the ultra-thin asphalt overlay is composed of tack coat oil and a mixture, the mixture is laid on the top of the tack coat oil, the surface of the overlay paved road surface needs to be milled and roughened, the tack coat oil is sprinkled on the overlay paved road surface after milling and roughening, the milling surface in the transition section has a certain angle, and the tack coat oil and the ultra-thin asphalt overlay are arranged on the top of the milling surface in the transition section in sequence, the ultra-thin asphalt overlay adopts high-viscosity SBS modified asphalt as the asphalt binder, and the grading design adopts an open-graded mixture.

2. The silent drainage ultra-thin asphalt overlay construction structure according to claim 1 is characterized in that: The transition section is arranged at the joints between the front and rear ends of the overlay paving section and the adjacent road surface, and the length of the transition section is 5-8m.

3. The silent drainage ultra-thin asphalt overlay construction structure according to claim 1 is characterized in that: The milling and roughening depth of the overlay paving section and the transition section is 1 cm, and the thickness of the ultra-thin asphalt overlay is 1.5 cm.

4. The silent drainage ultra-thin asphalt overlay construction structure according to claim 1 is characterized in that: The tack coat oil is a diluted asphalt type non-emulsified tack coat oil, and the spreading amount of the tack coat oil per square meter is 0.2-0.25 kg.

5. The silent drainage ultra-thin asphalt overlay construction structure according to claim 1 is characterized in that: The tack coat oil is in a liquid flow state at room temperature and is spread using a high-pressure atomizing spreader.

6. The silent drainage ultra-thin asphalt overlay construction structure according to claim 1 is characterized in that: The loose laying coefficient of the mixture is 1.1, and the loose laying thickness is 1.6-1.7 cm.

7. The silent drainage ultra-thin asphalt overlay construction structure as claimed in claim 6, characterized in that: The mixture needs to be compacted after loose spreading, and the compaction thickness is 1.5 cm.

8. The silent drainage ultra-thin asphalt overlay construction structure according to claim 1 is characterized in that: The discharge temperature of the mixture is 180-190°C, and the paving temperature is not lower than 170°C.

9. The silent drainage ultra-thin asphalt overlay construction structure according to claim 1 is characterized in that: The milling surface in the transition section extends downwardly and obliquely toward the adjacent road section, the highest point of the transition section is in the same horizontal plane as the top surface of the overlay section, and the lowest point of the transition section is in the same horizontal plane as the adjacent road surface.

10. The silent drainage ultra-thin asphalt overlay construction structure according to claim 1, characterized in that: The measured anti-skid value of the ultra-thin asphalt overlay is 65, and the water permeability coefficient is 1560ml / min.

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