阅读说明：本技术 雾封层沥青路面养护剂及其制备方法 (Fog seal asphalt pavement curing agent and preparation method thereof ) 是由 李京跃 郜卫东 宋合财 王德亮 姜涛 朱建平 许家豪 于 2021-09-13 设计创作，主要内容包括：本发明公开了一种雾封层沥青路面养护剂及其制备方法,该养护剂包括：纳米二氧化钛、改性沥青、抗坏血酸钠、再生剂和有机溶剂,其中,所述再生剂为煤油、笨酚、多元酚、萘、蒽、多元芳烃中的任意一种或多种,所述有机溶剂为甲苯、乙醇、天那水中的任意一种或多种。本发明解决了现有的沥青路面养护剂对沥青路面降温、防止强光作用损害路面等方面的养护性能不佳的问题。(The invention discloses a fog seal asphalt pavement curing agent and a preparation method thereof, wherein the curing agent comprises the following components: the composite material comprises nano titanium dioxide, modified asphalt, sodium ascorbate, a regenerant and an organic solvent, wherein the regenerant is any one or more of kerosene, phenol, polyphenol, naphthalene, anthracene and polyaromatic hydrocarbon, and the organic solvent is any one or more of toluene, ethanol and Tiana water. The invention solves the problem of poor maintenance performance of the existing asphalt pavement maintenance agent in the aspects of cooling the asphalt pavement, preventing the pavement from being damaged by strong light and the like.)

1. The fog seal asphalt pavement curing agent is characterized by comprising the following components in parts by weight: nanometer titanium dioxide, modified asphalt, fatty alcohol-polyoxyethylene ether, sodium ascorbate, regenerant and organic solvent, wherein, the regenerant is any one or more in kerosene, phenol, polyphenol, naphthalene, anthracene, polyaromatic hydrocarbon, organic solvent is any one or more in toluene, ethanol, Tiana water.

2. The fog seal asphalt pavement curing agent as claimed in claim 1, characterized by comprising, by mass, 5% -10% of nano titanium dioxide, 20% -40% of modified asphalt, 30% -40% of fatty alcohol-polyoxyethylene ether, 3% -5% of sodium ascorbate, 2% -3.5% of a regenerant and 30% -40% of an organic solvent.

3. The fog seal asphalt pavement curing agent as claimed in claim 1, wherein the nano silica has a particle size of 1nm to 100 nm.

4. The fog seal asphalt pavement curing agent as claimed in claim 1, wherein the modified asphalt is rubber modified asphalt.

5. The preparation method of the fog seal asphalt pavement curing agent as claimed in any one of claims 1 to 4, characterized by comprising the following steps:

adding an organic solvent into the modified asphalt, melting at 100 ℃, and stirring for 10-15 min to obtain a first mixture;

cooling the first mixture to 70 ℃, adding a regenerant and sodium ascorbate, and stirring for 5-10 min to obtain a second mixture;

adding nano titanium dioxide into the second mixture, stirring for 8-10 min, and standing for 5-8 min to obtain a third mixture;

and adding fatty alcohol-polyoxyethylene ether into the third mixture, stirring for 10-15 min, and cooling to room temperature to obtain the fog seal asphalt pavement curing agent.

Technical Field

The invention relates to the technical field of asphalt pavement maintenance, in particular to a fog seal asphalt pavement curing agent and a preparation method thereof.

Background

The existing asphalt pavement curing agent is mainly used for curing and reinforcing the performances of asphalt regeneration, crack prevention, crack repair, abrasion resistance, water resistance and the like of asphalt pavement, and is not sufficient in the aspects of cooling the asphalt pavement and preventing the strong light from damaging the maintenance function of the pavement.

Disclosure of Invention

In order to overcome the defects in the prior art, the fog seal asphalt pavement curing agent and the preparation method thereof are provided, so that the problem of poor curing performance in the aspects of cooling the asphalt pavement and preventing the pavement from being damaged by strong light action of the existing asphalt pavement curing agent is solved.

In order to achieve the purpose, the fog seal asphalt pavement curing agent comprises: nanometer titanium dioxide, modified asphalt, sodium ascorbate, fatty alcohol-polyoxyethylene ether, regenerant and organic solvent, wherein, the regenerant is any one or more in kerosene, phenol, polyphenol, naphthalene, anthracene, polyaromatic hydrocarbon, organic solvent is any one or more in toluene, ethanol, Tiana water.

Further, the composite material comprises 10-15% of nano titanium dioxide, 20-30% of modified asphalt, 3-10% of sodium ascorbate, 1-2.5% of regenerant and 30-40% of organic solvent by mass percent.

Furthermore, the particle size of the nano silicon dioxide is 1 nm-100 nm.

Further, the modified asphalt is rubber modified asphalt.

The invention provides a preparation method of a fog seal asphalt pavement curing agent, which comprises the following steps:

melting the modified asphalt at 100 ℃;

and sequentially adding nano titanium dioxide, an organic solvent, a regenerant and sodium ascorbate into the melted modified asphalt, and stirring at a high speed for 20-30 min to obtain the fog seal asphalt pavement curing agent.

The fog seal asphalt pavement curing agent has the beneficial effects that after nanometer fog titanium dioxide is used as an additive and added into a road curing agent, a conventional fog seal can be formed on a road, and the fog seal asphalt pavement curing agent plays a role in physically protecting an asphalt pavement. Different from the common road maintenance agent, the protective layer formed by adding the ultrafine particle nano titanium dioxide can reflect more sunlight, so that the temperature of the road surface is about 7 ℃ lower than that of the common asphalt road surface. The fog sealing layer asphalt pavement curing agent can generate substances with strong oxidizing property under the irradiation of light, and can decompose a large amount of organic and inorganic substances. When the asphalt pavement is sprayed on a road, pollutants discharged by vehicles to the air and then attached to the road surface can be reduced, the content of nitrogen oxides in the air near the road surface is effectively reduced, in addition, the water seepage performance of the asphalt pavement is also improved to a certain degree, and the anti-seepage effect is better. The asphalt pavement is protected from sunlight and rain. Meanwhile, the albedo of the asphalt pavement is improved, and the heat absorption capacity of the asphalt pavement is reduced.

Detailed Description

The present application will be described in further detail with reference to examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail with reference to examples.

The invention provides a fog seal asphalt pavement curing agent, which comprises the following components: nano titanium dioxide, modified asphalt, sodium ascorbate, a regenerant and an organic solvent.

Wherein the particle size of the nano silicon dioxide is 1 nm-100 nm.

The modified asphalt is rubber modified asphalt.

The regenerant is any one or more of kerosene, phenol, polyphenol, naphthalene, anthracene and polyaromatic hydrocarbon.

The organic solvent is one or more of toluene, ethanol and Tiana water.

The fog seal asphalt pavement curing agent comprises, by mass, 5-10% of nano titanium dioxide, 20-40% of modified asphalt, 30-40% of fatty alcohol-polyoxyethylene ether, 3-5% of sodium ascorbate, 2-3.5% of a regenerant and 30-40% of an organic solvent.

Example one

The fog seal asphalt pavement curing agent comprises, by mass, 5% of nano titanium dioxide, 30% of modified asphalt, 30% of fatty alcohol-polyoxyethylene ether, 5% of sodium ascorbate, 3.5% of polyphenol and 30% of toluene.

Example two

The fog seal asphalt pavement curing agent comprises, by mass, 5% of nano titanium dioxide, 30% of modified asphalt, 30% of fatty alcohol-polyoxyethylene ether, 5% of sodium ascorbate, 3.5% of phenol and 30% of Tiana water.

Comparative example 1

The common curing agent comprises, by mass, 30% of refined asphalt, 30% of fatty alcohol-polyoxyethylene ether, 8% of sodium ascorbate, 5.5% of phenol and 30% of Tianna water.

The invention provides a preparation method of a fog seal asphalt pavement curing agent, which comprises the following steps:

s1: adding an organic solvent into the modified asphalt, melting at 100 ℃, and stirring for 10-15 min to obtain a first mixture;

s2: cooling the first mixture to 70 ℃, adding a regenerant and sodium ascorbate, and stirring for 5-10 min to obtain a second mixture;

s3: adding nano titanium dioxide into the second mixture, stirring for 8-10 min, and standing for 5-8 min to obtain a third mixture;

s4: and adding fatty alcohol-polyoxyethylene ether into the third mixture, stirring for 10-15 min, and cooling to room temperature to obtain the fog seal asphalt pavement curing agent.

The invention provides a maintenance method of an asphalt pavement, which comprises the following steps:

a. and leveling and cleaning the road surface to be maintained.

Before formal spraying of the curing agent, the uneven position of the road surface to be cured is leveled, and construction can be carried out after the flatness of the road surface meets the construction requirements. And meanwhile, the diseases of the pavement to be maintained are treated according to the corresponding highway maintenance technical specifications, so that the pavement to be maintained can keep certain strength, rigidity and overall stability.

b. And (5) preparing for spraying the curing agent.

When the pavement to be maintained has large cracks, pits and damages, the pavement should be repaired in advance, and when the pits are deep, the pavement should be compacted and leveled. The cracks with the width larger than 4mm can be made of mortar formed by mixing high-content emulsified asphalt and fine sand or high-permeability asphalt with good shrinkage and expansion effects as a joint filling material, and large cracks can be treated in time. After the unqualified parts are repaired, all the garbage such as weeds, dust, vegetation and the like on the road surface needs to be removed in time, a water spray gun is adopted for washing, and after the road surface is thoroughly dried, the construction of the curing agent can be carried out. In order to improve the service performance of the fog seal asphalt pavement curing agent, the materials are reasonably blended and uniformly mixed before construction. The fog seal asphalt pavement curing agent disclosed by the invention is sprayed at high pressure (5-8 MPa) to form an atomized state.

c. And (5) spreading the curing agent.

Every 1m²About 1L of maintenance material needs to be sprayed on the pavement, and when the maintenance material is sprayed, the spraying vehicle is ensured to spray from the central dividing belt to two sides, so that the uniform spraying is ensured. The super-high road should be sprinkled from the shoulder of the road to prevent the surplus curing agent from flowing down. The construction speed of the machine is set by combining the working efficiency and the spreading width of the spreading machine, and the construction distance of each spreading is further determined. After the construction of the fog sealing layer is finished, in the process of forming the strength of the pavement layer, maintenance work needs to be carried out in time, and traffic is strictly controlled.

In order to show the performance of the fog seal asphalt pavement curing agent, the fog seal asphalt pavement curing agent and a common curing agent are respectively adopted to carry out construction and maintenance treatment on a test road section, after construction and maintenance are finished, parameters such as the surface temperature of a construction road surface are detected and researched, and the test results are shown in the following table 1.

TABLE 1 comparison of Performance of ordinary curing agent and fog seal asphalt pavement curing agent of the present invention

The test section 1 is maintained by using the fog seal asphalt pavement maintenance agent in the first embodiment, the test section 2 is maintained by using the fog seal asphalt pavement maintenance agent in the second embodiment, and the test section 3 is maintained by using the common maintenance agent in the comparative example. All the test road sections are respectively maintained by adopting the asphalt pavement maintenance method provided by the invention.

With respect to the detection methods of the detection items (temperature, nitrogen oxide concentration in air, water permeation test) in the examples and comparative examples of the present invention, the following methods were employed for the tests:

a. the temperature detection refers to the field test procedure of highway subgrade and pavement (JTG 3450 and 2019).

b. The detection of nitrogen oxides in air refers to the fixed potential electrolysis method for measuring nitrogen oxides in waste gas of fixed pollution sources (HJ 693-.

c. The water surface descending time of the water seepage tester refers to the field test regulation of road bed and pavement (JTG 3450 and 2019).

According to the analysis of the detection result, the surface temperature of the pavement cured by the fog sealing layer asphalt pavement curing agent is reduced, the design specification of the pavement is met, other pavement performances of the pavement cannot be reduced, and the aims of reducing the surface temperature of the pavement and improving the light reflection capability of the pavement are fulfilled.

The ultrafine titanium dioxide particles of the fog seal asphalt pavement curing agent are sprayed on asphalt roads, and the titanium dioxide particles are embedded into tiny gaps of the pavements. When ultraviolet light in sunlight is irradiated on a road surface, electrons in the molecular structure of the titanium dioxide particles are activated. They will further drift to the road surface and even to the air, and will start to degrade the organic matters in the air, i.e. the nitrogen oxides in the exhaust gas of the automobile.

As can be seen from Table 1, compared with the common curing agent, the fog seal asphalt pavement curing agent provided by the invention has the advantages that the pavement temperature is reduced, the nitrogen oxide content of the air near the pavement is reduced, and meanwhile, the titanium dioxide nanoparticles cannot be directly introduced into the air and cannot be inhaled by a human body. And after the nano titanium dioxide is added, the water seepage performance of the asphalt pavement is also improved to a certain degree, and the anti-seepage effect is better. The asphalt pavement is protected from sunlight and rain. Meanwhile, the albedo of the asphalt pavement is improved, and the heat absorption capacity of the asphalt pavement is reduced.

The fog seal asphalt pavement curing agent disclosed by the invention takes nano-fog titanium dioxide with smaller particles as an additive to be added into a road curing agent, so that a conventional fog seal is formed on a road, and the physical protection effect on an asphalt pavement is achieved. Different from the common road maintenance agent, the protective layer formed by adding the ultrafine particle nano titanium dioxide can reflect more sunlight, so that the temperature of the road surface is about 7 ℃ lower than that of the common asphalt road surface.

The lower the temperature of the asphalt pavement, the longer the life. The fog seal asphalt pavement curing agent is a curing agent containing titanium dioxide ultrafine particles, and the cost per square meter is only 10 yuan. The new road is usually maintained for the first time after being laid for three years and maintained again after eight years, so the cost is not high.

The fog sealing layer asphalt pavement curing agent can generate substances with strong oxidizing property under the irradiation of light, and can decompose a large amount of organic and inorganic substances. When the water-based air-purifying agent is sprayed on a road, pollutants discharged to the air by a vehicle and attached to the road surface can be reduced, and the content of nitrogen oxides in the air near the road surface can be effectively reduced.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.