Spraying equipment adopting foamed asphalt for construction

Abstract

The invention provides spraying equipment for construction by adopting foamed asphalt, and belongs to the technical field of asphalt pavement construction, the spraying equipment comprises an asphalt distribution truck and a foaming device, the asphalt distribution truck is used for spraying the foamed asphalt to a pavement; the foaming device is connected to the asphalt distribution truck and used for processing common asphalt or modified asphalt into foamed asphalt, the asphalt output end of the foaming device is communicated with the asphalt distribution truck, and the asphalt distribution truck sprays the foamed asphalt to the road surface. The spraying equipment adopting the foamed asphalt for construction can be widely applied to various grades of highways, urban roads, rural roads and the like. According to the specific technology, asphalt is foamed through a foaming device on an asphalt distribution truck, foamed asphalt is generated and directly distributed to an asphalt pavement structure layer, and the advantages that the construction technology is simplified, the material cost is reduced, energy consumption is reduced, and the construction progress is accelerated are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of asphalt pavement construction, and more specifically, relates to a spraying device for construction using foamed asphalt. Background Art

[0002] During asphalt pavement construction, the tack coat and seal coat of the asphalt pavement are currently mostly made of emulsified asphalt, modified emulsified asphalt and other materials, the main components of which are asphalt, emulsifier, modifier, water and the like.

[0003] The main reason for not using hot asphalt is that hot asphalt has high viscosity, is not easy to construct, and is not easy to spray evenly. 1. Emulsified asphalt production requires special emulsified asphalt equipment. The raw materials for emulsified asphalt production are asphalt, emulsifier, modifier, etc., and the production cost is relatively high; 2. Emulsified asphalt needs to be prepared in advance, but there is a time limit for storage. In order to prevent demulsification, it cannot be stored for a long time. Summary of the invention

[0004] The purpose of the present invention is to provide a spraying device for construction using foamed asphalt, aiming to solve the technical problems that hot asphalt has high viscosity, is difficult to construct, and is difficult to spray evenly.

[0005] To achieve the above object, the technical solution adopted by the present invention is: to provide a spraying device for construction using foamed asphalt, comprising: Asphalt spreader, used to spray foam and spread asphalt onto the road surface; The foaming device is connected to the asphalt spreading vehicle and is used to process ordinary asphalt or modified asphalt into foamed asphalt. The asphalt output end of the foaming device is connected to the asphalt spreading vehicle, and the asphalt spreading vehicle sprays foamed asphalt onto the road surface.

[0006] In a possible implementation, the asphalt spreading vehicle includes: Automobile chassis; Asphalt tank; Thermal oil heating system; Hydraulic system; Combustion system; Asphalt foaming spraying system; Control systems; Pneumatic system; Operating platform.

[0007] In a possible implementation, the asphalt pavement structure includes, from bottom to top: Grassroots; Translaminar; Lower sealing layer; Asphalt pavement sublayer; Adhesive layer; Asphalt pavement middle surface layer; Adhesive layer; Asphalt pavement top layer; Upper sealing layer.

[0008] In a possible implementation, when the foamed asphalt bottom seal is used, the speed of the asphalt spreading vehicle is controlled at 2-20 km / h, and the amount of foamed asphalt spread is controlled between 0.5 kg / m² and 1.2 kg / m².

[0009] In one possible implementation, tack coat asphalt spreading operations should be carried out between the asphalt lower layer and the middle surface layer, and between the middle surface layer and the upper layer. The speed of the asphalt spreading vehicle should be 5-25km / h, and the amount of foamed asphalt spread should be controlled between 0.2kg / m² and 0.5kg / m².

[0010] The beneficial effect of a spraying device using foamed asphalt for construction provided by the present invention is that: compared with the prior art, the spraying device using foamed asphalt for construction provided by the present invention includes an asphalt spreading vehicle and a foaming device, the asphalt spreading vehicle is used to spray foamed asphalt onto the road surface; the foaming device is connected to the asphalt spreading vehicle, and is used to process ordinary asphalt or modified asphalt into foamed asphalt, the asphalt output end of the foaming device is connected to the asphalt spreading vehicle, and the asphalt spreading vehicle sprays foamed asphalt onto the road surface. The spraying device using foamed asphalt for construction provided by the present invention can be widely used in highways of various grades, urban roads, rural roads, etc. The specific technology is to foam the asphalt through the foaming device on the asphalt spreading vehicle, generate foamed asphalt and directly spread it on the asphalt pavement structure layer, so as to achieve the advantages of simplified construction process, reduced material cost, reduced energy consumption, and accelerated construction progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 A schematic diagram of the working principle of a spraying device for construction using foamed asphalt provided in an embodiment of the present invention; Figure 2 A schematic diagram of a pavement structure after spraying using a spraying device constructed using foamed asphalt provided in an embodiment of the present invention; Figure 3 A schematic structural diagram of an asphalt foaming system of a spraying device for construction using foamed asphalt provided in an embodiment of the present invention.

[0013] Description of reference numerals: 1. Water tank 2. Liquid level sensor 3. Drain valve 4. Water pump 5. Pressure sensor 6. Safety valve 7. Flow sensor 8. Solenoid valve 9. Check valve 10. Sprinkler 11. Asphalt tank 12. Asphalt discharge valve 13. Asphalt pump 14. Asphalt three-way valve 15. Asphalt foaming chamber 16. Delivery pipeline 17. Asphalt spraying device. DETAILED DESCRIPTION

[0014] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0015] Please also read Figures 1 to 3 Now, a spraying device for construction using foamed asphalt provided by the present invention is described. The spraying device for construction using foamed asphalt comprises an asphalt distributor and a foaming device. The asphalt distributor is used to spray foamed asphalt onto the road surface. The foaming device is connected to the asphalt distributor and is used to process ordinary asphalt or modified asphalt into foamed asphalt. The asphalt output end of the foaming device is connected to the asphalt distributor, and the asphalt distributor sprays foamed asphalt onto the road surface.

[0016] The present invention provides a spraying device using foamed asphalt for construction. Compared with the prior art, the present invention provides a spraying device using foamed asphalt for construction, which can be widely used in highways of various grades, urban roads, rural roads, etc. The specific technology is to foam the asphalt through a foaming device on an asphalt spreading vehicle to generate foamed asphalt and directly spread it on the asphalt pavement structure layer, thereby achieving the advantages of simplified construction process, reduced material cost, reduced energy consumption, and accelerated construction progress.

[0017] In some embodiments, see Figures 1 to 3 The asphalt spreading vehicle includes a vehicle chassis, an asphalt tank, a thermal oil heating system, a hydraulic system, a combustion system, an asphalt foaming spraying system, a control system, a pneumatic system, and an operating platform.

[0018] When the asphalt foaming is working, the required asphalt flow rate and the required speed of the asphalt pump are calculated by the set spraying amount and the running speed, and the asphalt pump is driven by the speed regulating drive device 1 of the asphalt pump and works at the speed calculated by the control system. The required water flow rate and the speed of the water pump are calculated by the actual speed of the asphalt pump and the parameters of the set water addition ratio, and are driven and adjusted by the speed regulating drive device 2. Asphalt and water are simultaneously fed into the asphalt foaming device for foaming, and after the foaming is completed, they are transported to the spraying device for spraying.

[0019] In some embodiments, see Figures 1 to 3The asphalt pavement structure includes base layer, permeable layer, lower sealing layer, lower layer of asphalt pavement, tack layer, middle layer of asphalt pavement, tack layer, upper layer of asphalt pavement and upper sealing layer from bottom to top. During the construction process, adjust the matching of personnel and machinery to ensure the normal operation of construction machinery. Determine the amount of asphalt spraying for each functional layer according to the project design requirements and actual conditions, and clean the base layer or asphalt layer working surface to be sprayed to facilitate the bonding of foamed asphalt with the base layer and asphalt layer after spraying.

[0020] In some embodiments, see Figures 1 to 3 When using foamed asphalt as the lower sealing layer, the speed of the asphalt spreader is controlled at 2-20km / h, and the amount of foamed asphalt spread is controlled between 0.5kg / m² and 1.2kg / m².

[0021] In some embodiments, see Figures 1 to 3 , tack coat asphalt spreading operation should be carried out between the asphalt lower layer and the middle surface layer, and between the middle surface layer and the upper layer. The speed of the asphalt spreading vehicle should be 5-25km / h, and the amount of foamed asphalt spread should be controlled between 0.2kg / m² and 0.5kg / m².

[0022] In construction, the penetration layer is usually spread first, then the tack layer, and finally the sealing layer. When using an intelligent foam asphalt spreader for spreading the lower sealing layer and tack layer, the vehicle should maintain a stable speed and spraying volume, and ensure uniform spraying within the entire spraying width. The spraying order is generally from the inside to the outside, one lane after another, with no overlap or little overlap between two adjacent lanes, but no white exposure. After the spraying is completed, there is no need to close the traffic for maintenance, and the next process can be carried out directly. When spreading the lower sealing layer, the speed should be stable, the nozzle height should be appropriate, and the spraying volume should be uniform and without omissions, ensuring that the mineral material fully covers the asphalt surface and does not overlap. When carrying out asphalt tack layer construction, the spraying should ensure uniformity without omissions to avoid blanks or accumulation. The spraying volume of each functional layer should be determined in real time through the driving program according to the design requirements, and during construction, care should be taken to avoid construction under adverse conditions such as strong winds, rain or temperatures below 10°C.

[0023] 1. The new process is to equip the asphalt distributor with a special asphalt foaming device, process ordinary asphalt or modified asphalt and other materials into foamed asphalt and spray it directly on the road surface to complete the construction of the tack coat or seal coat, reducing production costs. 2. Foamed asphalt can be produced in real time during the spraying process of the distributor, avoiding long-term storage and causing no waste of asphalt. 3. It has advantages such as improving construction progress and optimizing construction technology.

[0024] The construction method of asphalt pavement is as follows: After the acceptance of the pavement base, before the asphalt pavement construction, the pavement base needs to be constructed with a penetration layer and a lower sealing layer.

[0025] When using foamed asphalt bottom seal, the asphalt is foamed through a foaming device to generate foamed asphalt and directly spread on the base layer sprayed with penetrating oil, and then a certain amount of crushed stone is spread to form a bottom seal, so as to close the surface gaps and prevent water from seeping in. At the same time, it plays the role of bonding and protecting the top surface of the base layer, so as to enhance the bonding between the base layer and the asphalt layer, thereby improving the durability and performance of the road surface. The speed of the asphalt spreader is generally controlled at 2-20km / h, and the amount of foamed asphalt spread is controlled between 0.5kg / m² and 1.2kg / m². After the construction of the bottom seal, the asphalt surface mixture is spread.

[0026] The tack layer asphalt spreading operation should be carried out between the asphalt lower layer and the middle surface layer, and between the middle surface layer and the upper layer. The speed of the asphalt spreading vehicle should be 5-25km / h, and the amount of foamed asphalt spread should be controlled between 0.2kg / m² and 0.5kg / m². The tack layer can enhance the bonding force between the two layers and ensure the integrity and stability of the asphalt pavement.

[0027] The above description is only a preferred embodiment of the present invention and is 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. A spraying device for construction using foamed asphalt, characterized in that: include: asphalt Spreader truck, used to spray foam and asphalt onto the road surface; The foaming device is connected to the asphalt spreading vehicle and is used to process ordinary asphalt or modified asphalt into foamed asphalt. The asphalt output end of the foaming device is connected to the asphalt spreading vehicle, and the asphalt spreading vehicle sprays foamed asphalt onto the road surface.

2. A spraying device for construction using foamed asphalt as claimed in claim 1, characterized in that: The asphalt spreading vehicle comprises: Automobile chassis; Asphalt tank; Thermal oil heating system; Hydraulic system; Combustion system; Asphalt foaming spraying system; Control systems; Pneumatic system; Operating platform.

3. A spraying device for construction using foamed asphalt as claimed in claim 1, characterized in that: The asphalt pavement structure includes: Grassroots; Translaminar; Lower sealing layer; Asphalt pavement sublayer; Adhesive layer; Asphalt pavement middle surface layer; Adhesive layer; Asphalt pavement top layer; Upper sealing layer.

4. A spraying device for construction using foamed asphalt as claimed in claim 2, characterized in that: When the foamed asphalt bottom seal is used, the speed of the asphalt spreader is controlled at 2-20 km / h, and the amount of foamed asphalt spread is controlled between 0.5 kg / m² and 1.2 kg / m².

5. The spraying equipment for construction using foamed asphalt as claimed in claim 1, characterized in that: Tack coat asphalt spreading operation should be carried out between the asphalt lower layer and the middle surface layer, and between the middle surface layer and the upper layer. The speed of the asphalt spreading vehicle should be 5-25km / h, and the amount of foamed asphalt spread should be controlled between 0.2kg / m² and 0.5kg / m².

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