High-performance cold patch asphalt mixture production system

Abstract

The utility model discloses a high-performance cold patch asphalt mixture production system. The system is characterized by comprising an asphalt discharging pool, an asphalt tank, an asphalt metering device, a diluent tank, a diluent metering device, an additive tank, an additive metering device, a mixing reaction kettle, a cold supplementing liquid finished product tank, a cold supplementing liquid metering tank, a new aggregate discharging device, a new aggregate heating roller, a new aggregate weighing device, a new aggregate elevator, an RAP discharging device and an RAP heating roller, the system comprises an RAP weighing device, an RAP elevator, a powder storage device, a powder metering device, a primary stirring device, a cooling system, a secondary stirring device and an automatic packaging line. The production system combines the production advantages of the hot mix asphalt mixture and the cold patch asphalt mixture, the produced high-performance cold patch asphalt mixture is good in construction workability, small in diluent dosage, high in early strength, strong in water damage resistance, long in durability and low in production cost, and the production method is simple, mastered, low-carbon, environment-friendly and suitable for industrial production. The method is suitable for the high-performance cold patch asphalt mixture produced from brand new materials, and is also suitable for the high-performance cold patch asphalt mixture produced from all-old asphalt pavement milling materials.

Description

[0001] manual Technical Field

[0002] The utility model belongs to the technical field of new road materials, and relates to a high-performance cold-patch asphalt mixture production system that can be stored for a long time. The production system is suitable for high-performance cold-patch asphalt mixtures produced from new materials, and is also suitable for high-performance cold-patch asphalt mixtures produced from all-asphalt pavement milling materials. The specific production process is simple, the production process is controllable, low-carbon and environmentally friendly, low-cost, and the comprehensive performance of the cold-patch asphalt mixture is outstanding. Technical Background

[0003] In my country, high-grade highways are widely used, and asphalt pavement is generally used. Compared with cement pavement, asphalt pavement has the characteristics of short construction time, low noise, comfortable driving, easy repair and low dust. However, when asphalt pavement is damaged, it will reduce the use capacity and driving comfort of the pavement, and more seriously, it will cause traffic accidents. Therefore, it is very important to repair the pavement damage in time and open the traffic as soon as possible.

[0004] Hot mix asphalt is more suitable for projects with large quantities and concentrated locations, and its performance is relatively good. However, it is inconvenient and uneconomical to maintain and repair damaged roads that are relatively scattered and have small quantities. Especially in rainy, snowy and low temperature weather, hot mix asphalt is no longer suitable for road maintenance.

[0005] When repairing road defects, cold-patch asphalt mixture not only has low environmental pollution, convenient construction, simple operation, and can be constructed in low temperature, rain and snow environments, but also does not require heating compared to hot-mix asphalt mixture, saving energy and being more economical. In addition, using cold-patch asphalt mixture to repair the road surface can achieve the purpose of rapid repair and immediate opening to traffic.

[0006] At present, the commonly used cold patch asphalt mixture is a special road material made by mixing coarse aggregate, fine aggregate, filler and cold patch liquid at room temperature or medium temperature (80-100℃), among which the cold patch liquid is a thorough mixture of about 80% heavy traffic road petroleum asphalt, about 20% petroleum diluent and a small amount of admixture. Common problems of traditional cold-patch asphalt mixtures are low early strength, low cohesion, weak resistance to water loss, poor durability, and low-temperature construction and workability that cannot meet requirements. The main reasons are: ① The large amount of diluent used in cold-patch asphalt, while providing good construction and workability for the mixture, also greatly reduces the adhesion between asphalt materials. Only when the diluent is completely volatilized in the mixture can the strength, cohesion and durability of the mixture be restored; ② Coarse and fine aggregates and mineral powder are mixed with cold-patch asphalt at room temperature or medium temperature. The temperature is too low, so that the adhesion and adhesion work between aggregate and asphalt are far from reaching the bonding effect between hot asphalt and aggregate under high temperature conditions. The asphalt film is easily detached from the aggregate surface under the action of water, resulting in poor water damage resistance of the cold-patch asphalt mixture. When the mixing temperature is raised to the high temperature state of hot asphalt and aggregate mixing in order to increase the bonding force between aggregate and cold patch asphalt, a large amount of diluent will evaporate from the mixture due to the high temperature, and the cold patch asphalt mixture will agglomerate and harden, and the construction workability will disappear instantly; ③ The cold patch fluid is mixed with the aggregate, in which the diluent in the cold patch fluid, while providing workability to the mixture, will also be absorbed by the pores of the aggregate in large quantities and be wrapped in the enclosed space by the asphalt film, on the one hand causing a large amount of diluent to be wasted; on the other hand, after being sealed by the asphalt film, it cannot evaporate, causing the strength of the cold patch asphalt mixture to never reach the effect of the hot mix asphalt mixture.

[0007] At the same time, as of 2022, the total mileage of highways in my country is 4.8465 million kilometers, and more than 90% are asphalt pavements. Under the repeated effects of environmental factors and vehicle loads, old asphalt pavements need regular maintenance and repair, and more than 200 million tons of old pavement materials are produced each year, with a value of 120 billion yuan. A large amount of old asphalt pavement milling materials (hereinafter referred to as RAP) are discarded, which on the one hand causes environmental pollution, on the other hand wastes high-quality asphalt resources, and large-scale mining of new stones will lead to ecological disasters such as vegetation destruction and soil erosion. The aggregate and asphalt in the old asphalt pavement materials are mixed under high temperature and hot conditions. The bonding force between the aggregate and asphalt is strong and the durability is good. If certain process conditions are adopted to transform the old asphalt pavement materials into cold-patch asphalt mixtures, it can not only greatly reduce the production cost of cold-patch asphalt mixtures, improve the comprehensive road performance of cold-patch asphalt mixtures, but also solve the social problems brought to the environment by old asphalt pavements.

[0008] Based on the above background, it is necessary to develop a high-performance cold patch asphalt mixture production system and production method to solve the defects of the current cold patch asphalt mixture, such as low early strength, poor low temperature construction and workability, weak resistance to water damage, poor durability and high production cost. Utility Model Content

[0009] In order to solve the defects existing in the production process of traditional cold-patch asphalt mixture, so that the cold-patch asphalt mixture can achieve the effect of hot-mix asphalt mixture during the application process, and change the temporary emergency road pothole repair into permanent repair, the utility model provides a cold-patch asphalt mixture production system. The production system combines the advantages of both hot-mix asphalt mixture and cold-patch asphalt mixture production, and produces high-performance cold-patch asphalt mixture with good construction and workability, small amount of diluent, high early strength, strong resistance to water damage, long durability and low production cost. It is suitable for high-performance cold-patch asphalt mixture produced from new materials, and also suitable for high-performance cold-patch asphalt mixture produced from all-old asphalt pavement milling materials.

[0010] To achieve the above purpose, the utility model is implemented through the following technical solutions:

[0011] A high-performance cold patch asphalt mixture production system, including an asphalt unloading tank, an asphalt tank, an asphalt metering device, a diluent tank, a diluent metering device, an admixture tank, an admixture metering device, a mixing reactor, a cold patch liquid finished product tank, a cold patch liquid metering tank, a new aggregate unloading device, a new aggregate heating drum, a new aggregate weighing device, a new aggregate elevator, a RAP unloading device, a RAP heating drum, a RAP weighing device, a RAP elevator, a powder storage device, a powder metering device, a primary stirring device, a cooling system, a secondary stirring device, and an automatic packaging line;

[0012] The asphalt unloading pool is connected to the asphalt tank, the asphalt tank is connected to the asphalt metering device, and the asphalt metering device is connected to the inlet of the primary stirring device;

[0013] The diluent tank is connected to the diluent metering device, and the diluent metering device is connected to the inlet of the mixing reactor;

[0014] The additive tank is connected to the additive metering device, and the additive metering device is connected to the inlet of the mixing reactor;

[0015] The outlet of the mixing reactor is connected to the cold liquid replenishment finished product tank, the cold liquid replenishment finished product tank is connected to the cold liquid replenishment metering tank, and the cold liquid replenishment metering tank is connected to the inlet of the secondary stirring device;

[0016] The new aggregate unloading device is connected to the new aggregate heating drum, the new aggregate heating drum is connected to the new aggregate elevator, the new aggregate elevator is connected to the new aggregate weighing device, and the new aggregate weighing device is connected to the inlet of the primary mixing device;

[0017] The RAP unloading device is connected to the RAP elevator, the RAP elevator is connected to the RAP heating drum, the RAP heating drum is connected to the RAP weighing device, and the RAP weighing device is connected to the inlet of the primary stirring device;

[0018] The powder material storage device is connected to the powder material metering device, and the powder material metering device is connected to the inlet of the primary stirring device;

[0019] The primary stirring device is communicated with the inlet of the cooling system;

[0020] The cooling system is in communication with the inlet of the secondary stirring device;

[0021] The outlet of the secondary stirring device is connected with an automatic packaging line.

[0022] Furthermore, it also includes a heat conduction system, which connects the asphalt unloading tank, asphalt tank, asphalt pump, asphalt metering device, mixing reactor, cold liquid replenishment finished tank, cold liquid replenishment pump and cold liquid replenishment metering tank, so as to achieve the heat preservation effect of the asphalt unloading tank, asphalt tank, asphalt pump, asphalt metering device, mixing reactor, cold liquid replenishment finished tank, cold liquid replenishment pump and cold liquid replenishment metering tank;

[0023] Furthermore, the heating range of the new aggregate heating and rolling is from room temperature to 220°C;

[0024] Further, the heating range of the RAP heating drum is from room temperature to 160°C;

[0025] Furthermore, the primary stirring system is an intermittent forced mixer;

[0026] Furthermore, the cooling system is a network chain type air cooling temperature control system;

[0027] Furthermore, the secondary stirring system is an intermittent forced mixer;

[0028] Furthermore, the first asphalt delivery pump is a three-way loop delivery pump;

[0029] Furthermore, the diluent adding pump is a three-way loop adding pump;

[0030] Furthermore, the admixture adding pump is a three-way loop adding pump.

[0031] Compared with the prior art, the cold patch asphalt mixture production system developed by the utility model has the following beneficial effects:

[0032] (1) This production system fully combines the advantages of hot mix asphalt mixture in which asphalt and aggregate are mixed under high temperature conditions, which can maximize the bonding strength and adhesion work between asphalt and aggregate, and the advantages of cold patching liquid and aggregate being combined in a cold state, which can make the mixture have the best construction and workability. The finished high-performance cold patch asphalt mixture takes into account the advantages of construction and workability, early strength, water damage resistance and durability.

[0033] (2) The automatic temperature control function of the cooling system can ensure the mixing process of hot mix asphalt mixture and cold patch liquid. On the one hand, it reduces the volatilization of diluent, and on the other hand, it makes the diluent only adhere to the surface of the mixture and not be absorbed by the pores of the aggregate. Under the premise of not changing the construction and workability of the cold patch asphalt mixture, the amount of diluent used is greatly reduced, saving production costs;

[0034] (3) This production system does not reduce the construction and workability of the cold-patch asphalt mixture. Due to the significant reduction in the amount of diluent, the high-performance cold-patch asphalt mixture can be quickly evaporated from the mixture under the same conditions after rolling and forming, and the road strength of the mixture can be quickly formed;

[0035] (4) This production system is suitable for producing high-performance cold-patch asphalt mixtures using new aggregates, asphalt, powder and cold patch liquid as raw materials, and is also suitable for producing high-performance cold-patch asphalt mixtures using old asphalt pavement milling materials, powder and cold patch liquid as raw materials. It is also suitable for producing high-performance cold-patch asphalt mixtures using new aggregates, old asphalt pavement milling materials, asphalt, powder and cold patch liquid as any combination of raw materials. One machine can be used for multiple purposes. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 The utility model is a structural schematic diagram of a high-performance cold patch asphalt mixture production system. DETAILED DESCRIPTION

[0037] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0038] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in combination with the embodiment of the utility model and the accompanying drawings. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] like Figure 1As shown, a high-performance cold patch asphalt mixture production system includes an asphalt unloading pool, an asphalt tank, an asphalt metering device, a diluent tank, a diluent metering device, an admixture tank, an admixture metering device, a mixing reactor, a cold patch liquid finished product tank, a cold patch liquid metering tank, a new aggregate unloading device, a new aggregate heating drum, a new aggregate weighing device, a new aggregate elevator, a RAP unloading device, a RAP heating drum, a RAP weighing device, a RAP elevator, a powder storage device, a powder metering device, a primary stirring device, a cooling system, a secondary stirring device, and an automatic packaging line;

[0040] It is characterized in that the asphalt unloading pool is connected to the asphalt tank, the asphalt tank is connected to the asphalt metering device, and the asphalt metering device is connected to the inlet of the primary stirring device;

[0041] The diluent tank is connected to the diluent metering device, and the diluent metering device is connected to the inlet of the mixing reactor;

[0042] The additive tank is connected to the additive metering device, and the additive metering device is connected to the inlet of the mixing reactor;

[0043] The outlet of the mixing reactor is connected to the cold liquid replenishment finished product tank, the cold liquid replenishment finished product tank is connected to the cold liquid replenishment metering tank, and the cold liquid replenishment metering tank is connected to the inlet of the secondary stirring device;

[0044] The new aggregate unloading device is connected to the new aggregate heating drum, the new aggregate heating drum is connected to the new aggregate elevator, the new aggregate elevator is connected to the new aggregate weighing device, and the new aggregate weighing device is connected to the inlet of the primary mixing device;

[0045] The RAP unloading device is connected to the RAP elevator, the RAP elevator is connected to the RAP heating drum, the RAP heating drum is connected to the RAP weighing device, and the RAP weighing device is connected to the inlet of the primary stirring device;

[0046] The powder material storage device is connected to the powder material metering device, and the powder material metering device is connected to the inlet of the primary stirring device;

[0047] The primary stirring device is communicated with the inlet of the cooling system;

[0048] The cooling system is in communication with the inlet of the secondary stirring device;

[0049] The outlet of the secondary stirring device is connected with an automatic packaging line.

[0050] Specifically, by setting a diluent metering device for the raw material diluent, a asphalt metering device for asphalt, a metering device for the configured cold patch liquid, and respectively setting metering devices for new aggregate, RAP and powder, accurate measurement is ensured, and the asphalt content, cold patch liquid content, diluent content and admixture content can be adjusted at any time according to different product requirements, so that the performance of the finished cold patch material is better.

[0051] Specifically, it also includes a heat conduction system, which connects the asphalt unloading tank, asphalt tank, asphalt pump, asphalt metering device, mixing reactor, cold liquid replenishment finished tank, cold liquid replenishment pump and cold liquid replenishment metering tank, so as to achieve the heat preservation effect of the asphalt unloading tank, asphalt tank, asphalt pump, asphalt metering device, mixing reactor, cold liquid replenishment finished tank, cold liquid replenishment pump and cold liquid replenishment metering tank;

[0052] Specifically, the heating range of the new aggregate heating and rolling is from room temperature to 220°C;

[0053] Specifically, the heating range of the RAP heating drum is from room temperature to 160°C;

[0054] Specifically, the primary stirring system is an intermittent forced mixer;

[0055] Specifically, the cooling system is a network chain type air cooling temperature control system;

[0056] Specifically, the secondary stirring system is an intermittent forced mixer;

[0057] Specifically, the first asphalt delivery pump is a three-way loop delivery pump;

[0058] Specifically, the diluent adding pump is a three-way loop adding pump;

[0059] Specifically, the admixture adding pump is a three-way loop adding pump.

[0060] Although the terms such as diluent, admixture, mixing reactor, new aggregate feeding device, RAP feeding device, primary stirring device, cooling system, secondary stirring device, automatic packaging line, etc. are used more frequently in this article, the possibility of using other terms is not excluded. The use of these terms is only for the purpose of more convenient description and explanation of the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it; based on the above ideal embodiments of the utility model, through the above description, relevant staff can make various changes and modifications within the scope of the technical idea of ​​the utility model. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A high-performance cold patch asphalt mixture production system, characterized by: Including asphalt unloading pool, asphalt tank, asphalt metering device, diluent tank, diluent metering device, admixture tank, admixture metering device, mixing reactor, cold replenishment finished product tank, cold replenishment metering tank, new aggregate unloading device, new aggregate heating drum, new aggregate weighing device, new aggregate elevator, RAP unloading device, RAP heating drum, RAP weighing device, RAP elevator, powder storage device, powder metering device, primary stirring device, cooling system, secondary stirring device, automatic packaging line; The asphalt unloading pool is connected to the asphalt tank, the asphalt tank is connected to the asphalt metering device, and the asphalt metering device is connected to the inlet of the primary stirring device; The diluent tank is connected to the diluent metering device, and the diluent metering device is connected to the inlet of the mixing reactor; The additive tank is connected to the additive metering device, and the additive metering device is connected to the inlet of the mixing reactor; The outlet of the mixing reactor is connected to the cold liquid replenishment finished product tank, the cold liquid replenishment finished product tank is connected to the cold liquid replenishment metering tank, and the cold liquid replenishment metering tank is connected to the inlet of the secondary stirring device; The new aggregate unloading device is connected to the new aggregate heating drum, the new aggregate heating drum is connected to the new aggregate elevator, the new aggregate elevator is connected to the new aggregate weighing device, and the new aggregate weighing device is connected to the inlet of the primary mixing device; The RAP unloading device is connected to the RAP elevator, the RAP elevator is connected to the RAP heating drum, the RAP heating drum is connected to the RAP weighing device, and the RAP weighing device is connected to the inlet of the primary stirring device; The powder material storage device is connected to the powder material metering device, and the powder material metering device is connected to the inlet of the primary stirring device; The primary stirring device is communicated with the inlet of the cooling system; The cooling system is in communication with the inlet of the secondary stirring device; The outlet of the secondary stirring device is connected with an automatic packaging line.

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