CN106758677A - The method of ice and snow area granulated crumb rubber asphalt mixture application technology - Google Patents

Abstract

The present invention relates to the technical field of rubber particle asphalt mixture, and more specifically relates to a method for the application technology of rubber particle asphalt mixture in ice and snow areas. The method has strong practicability, and can effectively suppress snow and ice on the road under the condition of ice and snow road, thereby providing a new solution for the problem of suppressing ice and snow on the road in seasonally frozen regions. The method includes stirring the mixture, spreading the mixture and compacting the asphalt.

Description

Application technology of rubber particle asphalt mixture in ice and snow area

technical field

The invention relates to the technical field of rubber particle asphalt mixture, in particular to a method for applying technology of rubber particle asphalt mixture in ice and snow areas.

Background technique

In the cold winter, many highways and urban roads are often endangered by ice and snow. When the snowfall is heavy, the road surface is basically in the state of ice and snow. Ice and snow greatly reduce the adhesion coefficient of the road surface, causing the car to skid, the braking distance is significantly extended, and even the brakes fail and the direction is out of control. , causing serious traffic accidents. These problems have become a major hidden danger to road traffic safety and people's lives and property safety. Therefore, the problem of ice and snow road surfaces has been plagued by road maintenance departments. Most areas in my country are ice and snow areas, and the problem of snow and ice on roads is relatively common. Especially in the early winter and early spring seasons, under the effect of temperature changes and vehicle loads on the road surface, thin ice is easily formed on the road surface, which affects road traffic safety. As the snow on the road is icy, the adhesion coefficient between the tire and the ground is low, and the adhesion that the ground can provide to the car is correspondingly reduced. Generally, the adhesion coefficient of dry asphalt pavement or concrete pavement is about 0.6, while the adhesion coefficient of snow road is 0.2, and the adhesion coefficient of icy road is 0.15, which are 1/3 and 1/4 of the adhesion coefficient of dry asphalt pavement respectively. Therefore, how to effectively solve the traffic safety on ice and snow roads, avoid traffic accidents or reduce traffic accidents, improve road capacity and operational efficiency, and form a good safety management model has become one of the important issues that plague the traffic management departments in ice and snow areas. In order to eliminate the potential safety hazards of the road surface under ice and snow conditions, the road maintenance department also often takes measures to remove the ice and snow on the road surface. The commonly used method of deicing and snowing on the road is to spray alcohol or salt deicing agents on the road to melt the ice and snow, but the deicing effect of alcohol deicing agents is greatly affected by the ambient temperature, and has the phenomenon of anti-icing, that is, once the ambient temperature When falling, the melted snow will refreeze into ice, making the road surface more slippery and the traffic accident rate higher. The vast majority of salt deicing agents are corrosive, easy to corrode and damage road structures and motor vehicles, and also cause pollution to soil, water and the atmosphere, and damage the ecological environment. Rubber granule pavement is a pavement made by crushing waste rubber tires into particles with a certain shape and particle size, replacing part of aggregates, and directly mixing them into asphalt mixture in the form of aggregates. Since the rubber particles in the rubber particle road surface have a large elastic deformation capacity, it can effectively improve the deformation capacity of the road surface and improve the bonding state between ice and snow and the road surface. Therefore, using waste tire rubber particles for road construction is one of the effective ways to solve the current problems.

Contents of the invention

The technical problem mainly solved by the present invention is to provide a method for the application technology of rubber particle asphalt mixture in ice and snow areas. Suppressing snow and ice on roads provides a new solution.

In order to solve the above-mentioned technical problems, the present invention relates to the technical field of rubber particle asphalt mixture, more specifically the method for the application technology of rubber particle asphalt mixture in ice and snow areas, said method comprising the following steps:

(1) The asphalt used in the mixing of the mixture is SBS modified asphalt and TPS modified asphalt, and the heating temperature is 175°C. During on-site construction, the SBS modified asphalt is heated to 175°C, and the TPS modifier is manually put into the mixing tank. The base asphalt heating temperature does not exceed 165°C, and the heating temperature of the stone is controlled above 190°C. The hot stone and rubber particles are mixed first, and then the asphalt and mineral powder are added for mixing. When the stone in the hot silo enters the mixing tank Rubber particles were added manually.

(2) When paving the mixture, thoroughly clean and rinse the pollutants on the lower bearing layer. The mortar and other scum should be wiped off with a steel brush. If there is water, do not pave when the road surface is wet. Potholes, looseness and other diseases of the layer should be repaired with asphalt mixture according to the regulations, the elevation, transverse slope and flatness of the lower bearing layer should be tested, and the defective areas that affect the quality and cannot be eliminated in the upper layer should be leveled Before the construction of the middle and upper layers, under the condition of no pollution, the sticky layer asphalt should be spread, and the amount of sticky layer oil should be spread according to the specification, and should be spread evenly. Cleaning, the temperature of the mixture paving is strictly in accordance with the specifications. Before paving each time, check and adjust the screed to ensure that it is straight. Before starting to pave the mixture, preheat the screed. Determine an appropriate speed, the entire paving is continuous and uniform, and the paving quality is observed at any time. If segregation and other abnormal phenomena are found, the cause should be analyzed in time and dealt with. The material scattered by the feed truck in the paving area should be removed in time.

(3) When compacting asphalt, use a double-steel-wheel vibratory roller. Each roller moves forward and backward once, with 1/2 of the wrong wheels. The mixture adopts SMA-16 gradation. When rolling, the driving wheel faces the paver. The initial compaction roller performs multiple rolling at the lap joints and both sides of the online paving. According to the rebound characteristics of the rubber particles, an appropriate increase The number of rolling times for the final pressing is to control the temperature at the end of the rolling to be lower than 70°C.

As a further optimization of the technical solution, the mixing temperature of the mixing material described in the method of the application technology of the rubber particle asphalt mixture in ice and snow areas of the present invention is 180°C.

As a further optimization of the technical solution, the mixing time after adding asphalt and slag powder in the method described in the application technology of rubber particle asphalt mixture in ice and snow areas of the present invention is 90 seconds respectively.

The beneficial effects of the method for the rubber particle asphalt mixture application technology in ice and snow areas of the present invention are:

The method of the application technology of rubber particle asphalt mixture in ice and snow areas of the present invention has strong practicability, and can effectively inhibit the snow on the road from freezing under the condition of ice and snow roads, thereby providing a new solution for the problem of inhibiting ice and snow on roads in seasonally frozen areas s solution.

Description of drawings

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific implementation methods.

Fig. 1 is a flow chart of the method for the application technology of rubber particle asphalt mixture in ice and snow areas.

detailed description

Specific implementation mode one:

The present invention relates to the technical field of rubber granule asphalt mixture, more specifically a method for the application of rubber granule asphalt mixture in ice and snow areas. The method includes the following steps:

(1) The asphalt used in the mixing of the mixture is SBS modified asphalt and TPS modified asphalt, and the heating temperature is 175°C. During on-site construction, the SBS modified asphalt is heated to 175°C, and the TPS modifier is manually put into the mixing tank. The base asphalt heating temperature does not exceed 165°C, and the heating temperature of the stone is controlled above 190°C. The hot stone and rubber particles are mixed first, and then the asphalt and mineral powder are added for mixing. When the stone in the hot silo enters the mixing tank Rubber particles were added manually.

(2) When paving the mixture, thoroughly clean and rinse the pollutants on the lower bearing layer. The mortar and other scum should be wiped off with a steel brush. If there is water, do not pave when the road surface is wet. Potholes, looseness and other diseases of the layer should be repaired with asphalt mixture according to the regulations, the elevation, transverse slope and flatness of the lower bearing layer should be tested, and the defective areas that affect the quality and cannot be eliminated in the upper layer should be leveled Before the construction of the middle and upper layers, under the condition of no pollution, the sticky layer asphalt should be spread, and the amount of sticky layer oil should be spread according to the specification, and should be spread evenly. Cleaning, the temperature of the mixture paving is strictly in accordance with the specifications. Before paving each time, check and adjust the screed to ensure that it is straight. Before starting to pave the mixture, preheat the screed. Determine an appropriate speed, the entire paving is continuous and uniform, and the paving quality is observed at any time. If segregation and other abnormal phenomena are found, the cause should be analyzed in time and dealt with. The material scattered by the feed truck in the paving area should be removed in time.

(3) When compacting asphalt, use a double-steel-wheel vibratory roller. Each roller moves forward and backward once, with 1/2 of the wrong wheels. The mixture adopts SMA-16 gradation. When rolling, the driving wheel faces the paver. The initial compaction roller performs multiple rolling at the lap joints and both sides of the online paving. According to the rebound characteristics of the rubber particles, an appropriate increase The number of rolling times for the final pressing is to control the temperature at the end of the rolling to be lower than 70°C.

Specific implementation mode two:

The present embodiment will be described below with reference to FIG. 1 . This embodiment will further describe Embodiment 1. The stirring temperature of the mixture is 180° C. when the mixture is stirred.

Specific implementation mode three:

The present embodiment will be described below in conjunction with FIG. 1 . This embodiment will further illustrate Embodiment 1. The mixing time after adding asphalt and slag powder during the mixing is 90 seconds respectively.

Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or replacements made by those skilled in the art within the scope of the present invention also belong to the scope of the present invention. protected range.

Claims (4)

1. the method for rubber granule asphalt mixture application technology in ice and snow area, it is characterized in that: described method comprises the following steps: The asphalt used in the mixing of the mixture is SBS modified asphalt and TPS modified asphalt, and the heating temperature is 175°C. During on-site construction, the SBS modified asphalt is heated to 175°C, the TPS modifier is manually put into the mixing tank, and the base asphalt is heated The temperature does not exceed 165°C, and the heating temperature of the stone is controlled above 190°C. Mix the hot stone and rubber particles first, then add asphalt and mineral powder for mixing, and manually add rubber when the stone in the hot silo enters the mixing tank. particles. 2. When paving the mixture, thoroughly clean and rinse the pollutants on the lower bearing layer. The mortar and other scum should be wiped off with a steel brush. If there are water marks, do not pave when the road surface is wet. Potholes, looseness and other diseases should be repaired with asphalt mixture according to the regulations, the elevation, transverse slope and flatness of the lower bearing layer should be tested, and the defect areas that affect the quality and cannot be eliminated on the upper layer should be leveled. 1. Before the construction of the upper layer, under the condition of no pollution, the asphalt of the sticky layer should be spread, and the amount of sticky layer oil should be spread according to the specification, and should be evenly spread, and the areas with less or more spraying should be sprinkled or cleaned manually , The paving temperature of the mixture is strictly in accordance with the requirements of the specification. Before paving each time, check and adjust the screed to ensure that it is straight. Before starting to pave the mixture, preheat the screed. When paving, it is determined according to the output of the mixture An appropriate speed, the entire paving is continuous and uniform, and the paving quality is observed at any time. If segregation and other abnormal phenomena are found, the cause should be analyzed in time and dealt with. The materials scattered by the feed truck in the paving area should be removed in time; (3) When compacting asphalt, use a double-steel-wheel vibratory roller. Each roller moves forward and backward once, with 1/2 of the wrong wheels. The mixture adopts SMA-16 gradation. When rolling, the driving wheel faces the paver. The initial compaction roller performs multiple rolling at the lap joints and both sides of the online paving. According to the rebound characteristics of the rubber particles, an appropriate increase The number of rolling times for the final pressing is to control the temperature at the end of the rolling to be lower than 70°C. 3. The method of application technology of rubber particle asphalt mixture in ice and snow areas according to claim 1, characterized in that: the mixing temperature of the mixture is 180°C. 4. The method of application technology of rubber particle asphalt mixture in ice and snow areas according to claim 1, characterized in that: the mixing time after adding asphalt and mineral powder during the mixing is 90 seconds respectively.