CN105001653B - A kind of mist seal maintenance material and its preparation method and application - Google Patents

Abstract

The invention provides a composition, which comprises: 50% to 70% of an asphalt regenerant, 0.1% to 3.0% of a compound emulsifier and the rest of water in terms of weight percentage; wherein, the compound emulsifier is emulsified by cationic Agent E-9 and nonylphenol polyoxyethylene ether NP-10, the mass ratio is: E-9:NP-10=0.5-5:1; preferably, the asphalt regeneration agent consists of topping oil slurry, decapitation Composed of asphalt oil and vacuum residue, the mass ratio is: topping oil slurry: deasphalted oil: vacuum residue=0.5-3:0.5-2:1. The invention also provides a preparation method of the composition and its application as a mist sealing material in asphalt pavement maintenance. The composition of the present invention can significantly restore the main properties of aged asphalt, improve road appearance and prolong the service life of the road; and after construction, the adhesion performance is good, and it is not easy to be stuck by the wheels, thereby reducing the maintenance frequency and reducing the maintenance cost of the road .

Description

A kind of mist seal maintenance material and its preparation method and application

technical field

The invention belongs to the technical field of preparation of preventive maintenance materials for asphalt pavement, and in particular relates to a fog seal maintenance material and its preparation method and application.

Background technique

By the end of 2012, the total mileage of expressways in my country had reached 95,600 kilometers, and the total mileage of national highways had reached 4.1 million kilometers. Among these high-grade road surfaces, asphalt concrete pavement accounted for about 80%, and asphalt pavement has become the main road surface of my country's highways. form. The design life of asphalt pavement is generally 15 to 20 years. Under the dual effects of the external environment and high-load traffic, many roads have early-stage diseases such as asphalt aging and falling off, microcracks, and looseness when they are far from reaching the design life. If the maintenance is not carried out in time, the road surface disease will become more and more serious, and the result can only be major repairs or even reconstruction. This will have many very bad effects: 1) It will inevitably cost a lot of money and manpower, 2) It will seriously pollute the environment, 3) It will consume a lot of high-quality asphalt, which will aggravate the shortage of high-quality asphalt resources in our country; Forest vegetation is reduced, water and soil are lost; 5) The expressway is closed for a long time, which affects the transportation capacity. Therefore, under the double influence of economy and environment, preventive maintenance of asphalt pavement is extremely necessary.

Fog seal is an effective road preventive maintenance technology with low cost. It can seal the pores and micro-cracks on the road surface, prevent moisture and air from entering the pavement structure and cause damage to the pavement structure, and has an automatic healing effect on cracks below 3cm. The fog seal layer can also stabilize the loose aggregate on the road surface to prevent further loosening, protect or repair the binder lost by the road surface due to aging, and reduce the aging and weathering of the road surface. In addition, the fog seal maintenance material can quickly penetrate the road surface, restore and regenerate the aged asphalt, and effectively maintain the road surface, with high efficiency and energy saving, restore the original appearance of the road to the greatest extent, prevent or delay the occurrence and development of diseases, improve the quality of the asphalt pavement, and effectively extend the road service life. The use of fog sealing layer technology can effectively extend the service life of the pavement for 3-5 years each time, and 3-4 times of preventive maintenance within the entire pavement life can increase the life of the pavement by 10-15 years, saving maintenance costs by 45%-50%, Moreover, the pollution to the environment is effectively avoided, and the social and economic benefits are remarkable.

In the prior art, many documents disclose mist sealing materials with different components. For example, the Chinese invention patent application whose publication number is CN102153926A and whose invention title is "A Asphalt Pavement Permeable Recycled Paint and Its Preparation Method" discloses a permeable asphalt pavement regenerated paint prepared by using a film-forming resin and a solvent. The regenerated paint is expensive, and the solvents such as toluene used seriously pollute the air. The publication number is CN102276996A, and the Chinese invention patent application titled "Fog Sealing Layer Material and Its Preparation Method" discloses a method for preparing the fog sealing layer material by mixing and diluting components A and B. Among them, water-based epoxy resin and curing agent are used in component B, which is expensive and the preparation process is complicated; and the curing reaction occurs immediately after the water-based epoxy resin and curing agent are mixed, the viscosity increases, and the construction retention time is short, which is not conducive to construction on site . The publication number is CN102010605A, and the Chinese invention patent application titled "Fog Sealing Layer Asphalt Emulsion Admixture and Its Application Method" is disclosed. agent and water composition. Among them, the asphalt regeneration aid uses any one of coal tar, kerosene, and diesel oil. Since coal tar contains a large amount of benzene, toluene, naphthalene, and a mixture of condensed aromatic hydrocarbons, which are strong carcinogens, it is easy to cause damage to operators during construction. Harm, but also pollute the environment and groundwater. Moreover, the asphalt emulsion admixture for the mist seal layer has complex components, and the preparation process is cumbersome. In addition, the publication number is CN102815892A, and the Chinese invention patent application titled "Anti-slip fog sealing layer material and its construction method" uses kaolin and sand materials to prepare kaolin emulsified asphalt, which has poor stability and requires constant stirring; preparation The regeneration effect of the mist seal layer material is not ideal. The publication number is CN102382478A, and the invention title is "star-shaped modified emulsified asphalt for fog seal layer and its preparation method" Chinese invention patent application. The disclosed fog seal layer modified asphalt adopts high molecular weight star-shaped SBS modifier. However, the stability is poor, and it is easy to delaminate. At the same time, a relatively high content of mercaptan or thioether is added as a reinforcing agent, which is harmful to the human body and the environment. The publication number is CN102702760A, and the Chinese invention patent application titled "Fog Sealing Layer Modified Emulsified Asphalt and Its Preparation Method" uses asphalt as the main material and uses expensive petroleum resin at the same time, and the production cost is relatively high.

Therefore, there are various deficiencies in the fog sealing layer in the prior art. It is necessary to develop a low-cost, environmentally friendly fog seal maintenance material for high-grade asphalt roads.

Contents of the invention

Aiming at the deficiencies of the prior art, the invention provides a new fog seal maintenance material for high-grade asphalt roads. The mist seal maintenance material of the present invention uses the residual oil in the petroleum processing process as an asphalt rejuvenator, adds suitable additives and emulsifiers, and emulsifies the cheap asphalt rejuvenator to obtain a high value-added fog seal maintenance material, which is effective for aging asphalt pavement To the role of preventive maintenance and regeneration.

In order to realize the foregoing invention object, the present invention adopts following technical scheme:

A composition, calculated by weight percentage, comprising: 50% to 70% of an asphalt regenerant, 0.1% to 3.0% of a compound emulsifier and the rest of water;

Wherein, the compound emulsifier is composed of cationic emulsifier E-9 and nonylphenol polyoxyethylene ether NP-10, and the mass ratio is: E-9:NP-10=0.5-5:1.

Preferably, the composition, by weight percentage, includes: 55%-65% of asphalt regenerant, 0.5%-2.0% of compound emulsifier and the balance of water.

More preferably, the composition, in terms of weight percentage, includes: 61% of asphalt regeneration agent, 0.8% of compound emulsifier and the balance of water.

Preferably, the mass ratio of the cationic emulsifier E-9 to nonylphenol polyoxyethylene ether is: E-9:NP-10=0.8-1.2:1.

More preferably, the mass ratio of the cationic emulsifier E-9 to nonylphenol polyoxyethylene ether NP-10 is: E-9:NP-10=1:1.

Preferably, in the composition, the bitumen regenerant is composed of topping oil slurry, deasphalted oil and vacuum residue, and the mass ratio is: topping oil slurry: deasphalted oil: vacuum residue=0.5- 3:0.5-2:1.

Preferably, the bitumen regeneration agent is composed of topped oil slurry, deasphalted oil and vacuum residue with a mass ratio of 1:1:1.

Another object of the present invention is to provide a preparation method for the above composition, comprising: mixing the compounded emulsifier with water to obtain the soap liquid required for emulsification; mixing the soap liquid with the asphalt regenerant, emulsifying , that is.

Preferably, the soap liquid and the asphalt regenerant are emulsified at 50-90°C.

Further preferably, at 50-90°C, the soap solution and the asphalt regenerant are mixed in a colloid mill for 1-10 minutes to emulsify.

Preferably, in the preparation method, the compounded emulsifier and water are mixed at room temperature or at 50-90° C., stirred for 0.5-2 hours, and after mixing evenly, the pH is adjusted to 1.0-5.0 to obtain the soap liquid.

Preferably, in the preparation method, the topping oil slurry, the deasphalted oil and the vacuum residue are stirred and mixed uniformly at 80-120°C for 0.5-2 hours according to the mass ratio, so as to obtain the asphalt regenerant.

The present invention also provides the composition prepared by the above preparation method.

Another object of the present invention is to provide the application of the above composition in the maintenance of asphalt roads.

Preferably, the application refers to the application of the composition as a fog sealing material in the maintenance of asphalt roads.

Preferably, the asphalt road is a high-grade asphalt road.

Preferably, the application refers to evenly spraying the emulsion of the composition diluted by one time on the aged asphalt pavement.

In addition, the present invention also provides an asphalt rejuvenator, which is composed of topping oil slurry, deasphalted oil and vacuum residue, and the mass ratio is: topping slurry: deasphalted oil: vacuum residue=0.5-3: 0.5-2:1.

Preferably, the asphalt regeneration agent is composed of topping slurry, deasphalting oil and vacuum residue in a mass ratio of: topping oil slurry: deasphalted oil: vacuum residue = 1:1:1.

The present invention also provides a preparation method of the above-mentioned asphalt rejuvenator: topping oil slurry, deasphalted oil and vacuum residue are stirred at 80-120° C. for 0.5-2 hours according to the mass ratio and mixed evenly to obtain the product.

The present invention optimizes the parameters affecting the performance of the composition as a mist seal material through the following experiments.

1. Asphalt regenerant

Due to the long-term contact of road asphalt with the external environment, under the comprehensive action of light, heat, oxygen, rain, etc., a series of physical and chemical changes will occur inside the asphalt, such as volatilization, oxidation, condensation, decomposition, etc., resulting in macroscopic properties of asphalt. With the attenuation of pavement performance, asphalt gradually ages. Therefore, the present invention selects the asphalt regenerant starting from the research on the macroscopic property change in the asphalt aging process.

1.1 Changes in macroscopic properties of asphalt during aging

Softening point, penetration and ductility are the three basic properties of asphalt. The aging degree of asphalt can be characterized by the changes of the three indicators before and after aging. Sinopec Donghai brand 70A new asphalt was used as the base asphalt. The basic properties of the base asphalt and the latest AH-70 national standard are shown in Table 1. The base asphalt was aged using a rotating thin film oven (RTFOT) to simulate the actual aging condition of road asphalt. The aging temperature is 163℃±1

℃, and the aging time is 1, 2, 3, 4, 5 hours respectively. Prepare samples with different aging times, and analyze the changes of asphalt penetration, ductility and softening point with aging time, the results are shown in Figure 1-1 to Figure 1-3.

Table 1 Basic properties of Donghai 70A asphalt

It can be seen from Figure 1-1 to Figure 1-3 that with the prolongation of asphalt aging time, the penetration and ductility of asphalt gradually decrease, and the softening point gradually increases. The penetration decays exponentially with the prolongation of the aging time, the softening point increases linearly with the prolongation of the aging time, and the change of the ductility is relatively small. Among the three indicators, the changes in ductility and penetration are the most obvious, and the asphalt rejuvenator should be able to compensate for the performance decline of aged asphalt in these two aspects.

1.2 Optimization of asphalt regenerant components and mass ratio

From a microscopic point of view, with the prolongation of asphalt aging time, the saturated content of asphalt decreased as a whole, the aromatic content gradually decreased, and the colloid content showed a trend of first increasing and then decreasing. Selecting a base oil with reasonable four-component content can supplement the missing components of aged asphalt and adjust the distribution of aged asphalt group components. Topping oil slurry, deasphalted oil and vacuum residue are by-products of petroleum refining, and their basic properties are shown in Table 2. It can be seen from Table 2 that topping oil slurry and deasphalted oil are rich in aromatic components, and vacuum residue oil is rich in colloidal components. It is speculated that mixing the three in an appropriate mass ratio can improve the performance of aged asphalt and make it "regenerated". Three kinds of base oils were formulated into asphalt rejuvenation agents according to different proportions, and then based on the weight of the aged asphalt, the asphalt rejuvenation agent was added to the aged asphalt at a ratio of 8%, and the penetration, softening point and ductility of the regenerated asphalt were measured. The results are shown in Figure 2-1 to Figure 2-3.

Table 2 Basic properties of three base oils

It can be seen from Figure 2-1 that the asphalt rejuvenator prepared with topping oil slurry, deasphalted oil and vacuum residue according to the ratio of 0.5-3:0.5-2:1 can improve the penetration of 70# aged asphalt Return to the national standard range. It can be seen from Figure 2-2 that after adding asphalt rejuvenator, the softening point of reclaimed asphalt shows a downward trend. It can be seen from Figure 2-3 that after adding asphalt rejuvenator, the ductility of regenerated asphalt can be restored to the level of new asphalt. In the case of the same effect on improving the ductility of aged asphalt, try to make the softening point of recycled asphalt as high as possible to improve its high temperature performance. The ratio of topping oil slurry, deasphalted oil and vacuum residue is 1:1:1 When , the corresponding softening point is closer to the softening point of the original asphalt, and the penetration and ductility of the aged asphalt can return to the level of the new asphalt.

Proved by above-mentioned experiments, topping oil slurry, deasphalted oil and vacuum residue are according to mass ratio: topping oil slurry: deasphalted oil: the ratio mixing of vacuum residue=0.5-3:0.5-2:1, It can restore the performance of aging asphalt and make it "regenerate"; therefore, the present invention uses topping oil slurry, deasphalted oil and vacuum residue mixed according to the above ratio as asphalt regeneration agent; the mass ratio of the three is preferably : Heading oil slurry: deasphalted oil: vacuum residue=1:1:1.

1.3 Effect of optimal asphalt rejuvenator on performance of aged asphalt

At 100°C, mix topping oil slurry: deasphalted oil: vacuum residue with a mass ratio of 1:1:1 for 1 hour to obtain an asphalt regenerant. For different degrees of aged asphalt, the prepared asphalt rejuvenator was added to the aged asphalt according to the ratio of 2%, 4%, 6%, 8% and 10%, respectively. Changes, as shown in Figure 3-1 to Figure 3-3.

From Figure 3-1 to Figure 3-3, it can be seen that after the asphalt rejuvenator of the present invention is added to aged asphalt, with the increase of the added amount, the softening point of the asphalt decreases gradually, and the penetration and ductility increase continuously. In view of the different aging degrees of base asphalt under different aging times, the amount of asphalt rejuvenator required to restore the three conventional indicators of aged asphalt to the level of new asphalt is different. In actual application, the spraying amount of asphalt rejuvenator should be determined according to the aging degree of the actual road surface .

Through the above research, it is preferred that the asphalt regenerant of the present invention is composed of topping oil slurry, deasphalted oil and vacuum residue, and the mass ratio is: topping slurry: deasphalted oil: vacuum residue=0.5-3 :0.5-2:1.

More preferably, the bitumen regeneration agent is composed of topped oil slurry, deasphalted oil and vacuum residue with a mass ratio of 1:1:1.

2. Emulsifier 2.1 Selection of emulsifier composition

In order to emulsify the asphalt regenerant of the present invention well, the emulsifier has been optimized. Six kinds of cationic emulsifiers were selected and compounded with non-ionic emulsifier (nonylphenol polyoxyethylene ether NP-10) at a mass ratio of 1:1. (Among them, AA-63D, MOK-1D, and AA57 were purchased from Meide Weishiweike Company, E4857, E-9, E-11 were purchased from AkzoNobel, NP-10 was purchased from Jiangsu Haian Petrochemical Factory) Add water and stir until completely dissolved, use 30% to 38% hydrochloric acid to adjust the pH to 2.0 , heated up to 50°C. Stir the topping oil slurry, deasphalted oil and vacuum residue according to the preferred ratio of 1:1:1 at 100°C for 1 hour to obtain the asphalt regenerant, start the colloid mill, and preheat it with a constant temperature water bath at 50°C. Add soap liquid and asphalt regenerant, and emulsify for 10 minutes to obtain the composition of the present invention. Put the composition into a stable tube, measure the storage stability of the composition for one day according to the standard JTG/T0655-1993, and select a suitable emulsifier by comparing the storage stability.

Specific steps are as follows:

(1) Slowly inject the cooled target product into the stability test tube until the liquid level reaches the 250mL mark on the tube wall. When injecting, pay attention that no air bubbles are attached to the branch pipe, and then plug the mouth of the pipe with a stopper. Put the sealed stability test tube containing the sample on the experimental platform, and let it stand at room temperature for 1 day or 5 days and nights.

(2) After standing still, gently pull out the plug at the mouth of the upper branch pipe, and pour about 50g from the mouth of the upper branch pipe into a weighed evaporation residue test container; then pull out the plug at the mouth of the lower branch pipe, and put the All the above samples are released and flow into another container, then fully shake the sample in the lower branch tube, tilt the stable tube, and the remaining sample in the tube flows out about 50g of the sample from the lower branch tube, and then connect it to the third weighed tube. The mass of the evaporation residue in the test vessel. Measure the evaporation residue content of the upper and lower parts respectively.

Composition storage stability is calculated as follows:

S _Z =|P-PB| (2-3)

in:

S _Z - the storage stability of the sample (%);

P _A - the evaporation residue content of the sample in the upper branch pipe after storage (%);

P _B - the evaporation residue content of the sample in the lower branch pipe after storage (%).

The results of the experiment are shown in Table 3.

Table 3 Technical indicators of emulsified products

It can be seen from Table 3 that compared with the surface tension of tap water at 50°C, which is 65.7mN m-1, the selected compound emulsifiers can well reduce the surface tension of soap liquid, but it does not correspond to the stability of the product. Relationship. Except for E4857, other cationic emulsifiers and NP-10 can emulsify the asphalt regenerant into a uniform emulsion, but only the stability of the asphalt emulsion of E-9 and NP-10 compound emulsifier can meet the requirements of JTG/T0655-1993 Standard requirements for storage stability of emulsified asphalt. Therefore, the present invention selects cationic emulsifier E-9 and nonylphenol polyoxyethylene ether NP-10 to compound.

2.2 Optimization of emulsifier compounding ratio

In order to be able to optimize the compounding ratio of E-9 and NP-10, based on the weight of the composition of the present invention, the addition of the compounded emulsifier is 0.8%, and the E-9 and NP-10 of different proportions Emulsify the optimized asphalt regenerant, put the target product into the stability tube, measure the five-day storage stability of the target product according to the standard JTG/T0655-1993, and optimize the suitable emulsifier by comparing the storage stability. The results of the experiment are shown in Figure 4. As can be seen from Figure 4, the stability of the target product is related to the proportion of emulsifier E-9. With the increase of the proportion of main emulsifier E-9, the stability improves; emulsifier E-9 and NP-10 When the compounding ratio is ≥1:1, the stability of the target product is stable. Since E-9 is more expensive than NP-10, the preferred emulsifier compounding ratio is E-9:NP-10=1:1.

Through the above research, the composition of the compound emulsifier is preferably cationic emulsifier E-9 and nonylphenol polyoxyethylene ether NP-10, the mass ratio is E-9:NP-10=0.5-5:1, more Preferably E-9:NP-10=0.8-1.2:1, most preferably E-9:NP-10=1:1.

The composition and preparation method of the composition of the invention are simple. The composition has good storage stability as a fog seal maintenance material, is convenient to use, and has good water dilution performance; it is environmentally friendly to use, has good adhesion performance after construction, and is not easy to be stuck by wheels; it can significantly restore the main properties of aged asphalt , improve the road appearance, protect the pavement structure, and prolong the service life of the road.

Description of drawings

The present invention will be described in detail below in conjunction with the accompanying drawings.

Figure 1 shows the changes in penetration, ductility, softening point and viscosity of Donghai 70A asphalt with aging time; where:

Figure 1-1 is the change curve of needle penetration with aging time,

Figure 1-2 is the change curve of ductility with aging time,

Figure 1-3 is the curve of softening point versus aging time.

Figure 2 shows the variation curves of the penetration, softening point and ductility of regenerated asphalt under different asphalt rejuvenating agent ratios. Between two horizontal lines or above one horizontal line indicates the range required by the AH-70 national standard; among them,

Figure 2-1 is the change curve of the penetration of reclaimed asphalt under different asphalt regenerant ratios. The penetration range required by the Ah-70 national standard is 60-80 (25°C)/0.1mm,

Figure 2-2 is the softening point change curve of recycled asphalt under different asphalt regenerant ratios. The softening point range required by the Ah-70 national standard is >44°C.

Figure 2-3 is the ductility change curve of recycled asphalt under different asphalt regenerant ratios. The ductility range required by the Ah-70 national standard is >100 (15°C) cm.

Figure 3 shows the aging asphalt with different aging times and different amounts of asphalt regenerant (mass ratio 1:1:1 topping oil slurry: deasphalted oil: vacuum residue), the penetration and softening point of regenerated asphalt and ductility change curve; among them,

Figure 3-1 is the change curve of the penetration of regenerated asphalt with different additions of asphalt regenerant,

Figure 3-2 is the change curve of softening point of regenerated asphalt with different additions of asphalt regenerant.

Figure 3-3 is the change curve of the ductility of reclaimed asphalt with different additions of asphalt regenerated agent, where the ductility greater than 150cm is plotted according to 150cm.

Figure 4 shows the curve of the 5-day stability of the emulsified asphalt rejuvenator varying with the specific gravity of E-9 in the compound emulsifier, where the horizontal line indicates that the 5-day stability range required by JTG/T0655-1993 is <5%.

The photo in Fig. 5 shows the road section maintenance effect of Test Example 2.

What Fig. 6 shows is the scanning micrograph of the emulsion particle of two kinds of composition magnification 1600 times in Test Example 3; Wherein:

Fig. 6-1 is the single emulsifier composition prepared by comparative example,

Fig. 6-2 is the composite emulsifier composition prepared in Example 1.

Fig. 7 is the particle size distribution figure of the emulsion particle of two kinds of compositions in test example 3; Wherein:

Fig. 7-1 is the single emulsifier composition prepared by comparative example,

Fig. 7-2 is the composite emulsifier composition prepared in Example 1.

Detailed ways

The present invention will be further described below through specific embodiments. The raw materials used in the examples can be purchased through open channels unless otherwise specified. in,

The topping oil slurry was from China Petroleum & Chemical Corporation,

Deasphalted oil was from China Petroleum & Chemical Corporation,

The vacuum residue was from China Petroleum & Chemical Corporation,

Cationic emulsifier E-9 was purchased from Akzo Nobel Company,

Nonylphenol polyoxyethylene ether NP-10 was purchased from Jiangsu Haian Petrochemical Plant,

Imported fog seal materials were purchased from Crafco, USA.

Embodiment 1 a kind of composition

Prepare the raw material formula of the described target product of 1kg:

Among them, topping oil slurry, deasphalted oil and vacuum residue constitute the asphalt rejuvenator, and E-9 and NP-10 constitute the compound emulsifier.

By following the preparation method as follows:

(1) Preparation of asphalt regenerant

Stir the topping oil slurry, deasphalted oil and vacuum residue according to the proportion at 80°C for 1 hour to obtain the asphalt regenerant, which is kept warm for later use.

(2) Configure soap liquid

Weigh the two emulsifiers, add water and stir until completely dissolved, use 30% to 38% hydrochloric acid to adjust the pH to 1.0, and heat up to 50°C for later use.

(3) Preparation of the target product

Start the colloid mill, preheat it with a constant temperature water bath at 50°C, add soap liquid and asphalt regeneration agent, and emulsify for 10 minutes to obtain 1 kg of the target product.

Embodiment 2 a kind of composition

Prepare the raw material formula of the described target product of 1kg:

By following the preparation method as follows:

(1) Preparation of asphalt regenerant

The topping oil slurry, deasphalted oil and vacuum residue are stirred at 120° C. for 0.5 h according to the proportion and mixed evenly to obtain an asphalt regenerant, which is kept warm for later use.

(2) Configure soap liquid

Weigh the two emulsifiers, add water and stir until they are completely dissolved, adjust the pH to 5.0 with 30% to 38% hydrochloric acid, and heat up to 90°C for later use.

(3) Preparation of the target product

Start the colloid mill, preheat it with a constant temperature water bath at 90°C, add soap liquid and asphalt regenerant, and emulsify for 5 minutes to obtain 1 kg of the target product.

Embodiment 3 a kind of composition

Prepare the raw material formula of the described target product of 1kg:

By following the preparation method as follows:

(1) Preparation of asphalt regenerant

Stir the topping oil slurry, deasphalted oil and vacuum residue according to the ratio at 100°C for 1 hour to obtain the asphalt regenerant, which is kept warm for later use.

(2) Configure soap liquid

Weigh the two emulsifiers, add water and stir until completely dissolved, use 30% to 38% hydrochloric acid to adjust the pH to 3.0, and raise the temperature to 70°C for later use.

(3) Preparation of the target product

Start the colloid mill, preheat with a 70°C constant temperature water bath, add soap liquid and asphalt regenerant, and emulsify for 1 minute to obtain 1 kg of the target product.

Application of the composition prepared in embodiment 4-6 embodiment 1-3

Dilute the composition prepared in Example 1-3 with water to an effective solid content of 20-40% (executed in accordance with the standard JTGE20-2011T0651-1993), and carry out on the asphalt pavement or high-grade asphalt pavement that needs maintenance according to the amount of 0.4kg/m2 Spray evenly.

Test example 1 The regeneration performance experiment of composition of the present invention

The evaporation residue of the composition prepared in Example 2 was added to 70# aged heavy traffic asphalt according to 8% by mass, mixed evenly, and the penetration, softening point and ductility were measured, so as to evaluate the The regeneration properties of the composition, the test results are shown in Table 4.

Table 4 The regeneration performance test result of composition of the present invention

It can be seen from Table 4 that when the composition of the present invention is added to 70# aged heavy traffic asphalt, the penetration and ductility of the aged asphalt are significantly improved; although the softening point decreases slightly, it still meets the requirements of the national standard. It shows that the composition of the present invention has good regeneration performance on aged asphalt, and meets the performance requirements of asphalt road fog sealing materials.

Test example 2 composition application effect of the present invention

The composition prepared in Example 1-3 was applied according to the method described in Example 4-6, and the photo of the road surface effect is shown in FIG. 5 . Taking the imported fog seal material as a control, the adhesion and wear resistance effect, penetration effect, regeneration effect, anti-seepage function and the influence on the friction coefficient of the road surface of the test road section were tracked and detected. The pavement performance test results are shown in Table 5-Table 7. The usage method of the imported mist sealing material is the same as that of Examples 1-3.

The application effect of the composition prepared in table 5 embodiment 1

The application effect of the composition prepared in table 6 embodiment 2

The application effect of the composition prepared in table 7 embodiment 3

It can be seen from Table 5-Table 7 that the compositions prepared in Examples 1-3 have excellent wear resistance and adhesion properties, and the penetration depth of the aged asphalt pavement can reach more than 7mm, the regeneration effect is good, and the water seepage of the pavement can be well reduced Coefficient, and the loss of the friction coefficient of the road surface is not more than 10%, which can improve the appearance and performance of the aging asphalt pavement. Therefore, the composition of the invention can be used as a fog sealing material for maintaining asphalt roads.

A kind of single emulsifier composition of comparative example

Prepare the raw material formula of the described target product of 1kg:

Among them, topping oil slurry, deasphalted oil and vacuum residue constitute asphalt rejuvenator, and E-9 is an emulsifier.

By following the preparation method as follows:

(1) Preparation of asphalt regenerant

Stir the topping oil slurry, deasphalted oil and vacuum residue according to the proportion at 80°C for 1 hour to obtain the asphalt regenerant, which is kept warm for later use.

(2) Configure soap liquid

Weigh the emulsifier, add water and stir until completely dissolved, adjust the pH to 1.0 with 30% to 38% hydrochloric acid, and raise the temperature to 50°C for later use.

(3) Preparation of the target product

Start the colloid mill, preheat it with a constant temperature water bath at 50°C, add soap liquid and asphalt regeneration agent, and emulsify for 10 minutes to obtain 1 kg of the target product.

Test example 3

Take the compositions prepared in Example 1 and Comparative Example respectively, dilute them 10 times with tap water, and observe the composition under a microscope at 1600 times. The photomicrograph is shown in Figure 6, wherein Figure 6-1 is the single emulsifier composition prepared in Comparative Example , Figure 6-2 is the composite emulsifier composition prepared in Example 1. The particle size distribution diagram of the emulsion particles is shown in Figure 7, wherein Figure 7-1 is the single emulsifier composition prepared in the comparative example, and Figure 7-2 is the composite emulsifier composition prepared in Example 1.

It can be seen from Fig. 6 and Fig. 7 that the particles in the emulsion using the single emulsifier E-9 emulsified asphalt rejuvenator are relatively large, d(05)=8.149μm, and the particle size distribution range is wide and not uniform enough; 9 and NP-10 compounded emulsifier emulsified asphalt rejuvenator to obtain a more uniform emulsion, small particle size and narrow distribution range, d(05)=2.531μm, therefore, better storage stability.

In a word, the present invention composes asphalt rejuvenator with topping oil slurry, deasphalted oil and vacuum residual oil, uses cationic emulsifier E-9 and nonylphenol polyoxyethylene ether NP-10 as compound emulsifier, and appropriate amount of The composition obtained by water emulsification has good storage stability, is convenient to use, and has good water dilution performance. The composition can remarkably restore the main properties of the aged asphalt, improve the appearance of the road, and prolong the service life of the road, so it can be used as a fog seal material for the maintenance of asphalt pavements, especially high-grade asphalt pavements. Moreover, the composition of the present invention is convenient to use and environmentally friendly, has good adhesion performance after construction, and is not easy to be stuck by wheels, thereby reducing maintenance frequency and road maintenance cost.

Claims (17)

1. A composition, characterized in that: in terms of weight percentage, it consists of: 50%~70% of asphalt regenerant, 0.1%~3.0% of compound emulsifier and the rest of water; Wherein, the compound emulsifier is composed of cationic emulsifier E-9 and nonylphenol polyoxyethylene ether NP-10, and the mass ratio is: E-9:NP-10=0.5-5:1; The asphalt regenerant is composed of topping oil slurry, deasphalted oil and vacuum residue, and the mass ratio is: topping slurry: deasphalted oil: vacuum residue=0.5-3:0.5-2:1. 2. The composition according to claim 1, characterized in that: in terms of weight percentage, it consists of: 55%~65% of asphalt regenerant, 0.5%~2.0% of compound emulsifier and the balance of water. 3. The composition according to claim 2, characterized in that: by weight percentage, it consists of: 61% asphalt regenerant, 0.8% compound emulsifier and the balance of water. 4. according to the composition described in any one in claim 1 to 3, it is characterized in that: the mass ratio of described cationic emulsifier E-9 and nonylphenol polyoxyethylene ether NP-10 is: E-9: NP-10=0.8-1.2:1. 5. composition according to claim 4, is characterized in that: the mass ratio of described cationic emulsifier E-9 and nonylphenol polyoxyethylene ether NP-10 is: E-9:NP-10=1: 1. 6. The composition according to claim 1, characterized in that: the asphalt regenerant is composed of topped oil slurry, deasphalted oil and vacuum residue with a mass ratio of 1:1:1. 7. the preparation method of the composition described in any one in claim 1 to 6, comprises: described complex emulsifier mixes with water and obtains the required soap liquid of emulsification; Mix, emulsify, and serve. 8. The preparation method according to claim 7, characterized in that: the soap liquid and the asphalt regenerant are emulsified at 50-90°C. 9 . The preparation method according to claim 8 , characterized in that: at 50-90° C., the soap solution and the asphalt regenerant are mixed in a colloid mill for 1-10 minutes to emulsify. 10. The preparation method according to claim 7, characterized in that: the compound emulsifier is mixed with water at room temperature or at 50-90°C, stirred for 0.5-2 hours, and after mixing evenly, adjust the pH to 1.0-5.0, Obtain the soap solution. 11. The preparation method according to any one of claims 7 to 9, characterized in that: topping oil slurry, deasphalted oil and vacuum residue are stirred at 80~120°C for 0.5~2h according to the mass ratio Mix evenly to obtain the asphalt regenerant. 12. The composition prepared by the preparation method described in any one of claims 7 to 11. 13. The application of the composition according to any one of claims 1 to 6 or 12 in the maintenance of asphalt roads. 14. The application according to claim 13, characterized in that: the composition is used as a fog sealing material in the maintenance of asphalt roads. 15. The application according to claim 13 or 14, characterized in that: the asphalt road is a high-grade asphalt road. 16. The application according to claim 13 or 14, characterized in that: the composition diluted by 1 time is uniformly sprayed on the aged asphalt pavement. 17. The application according to claim 15, characterized in that: the composition diluted by 1 time is uniformly sprayed on the aged asphalt pavement.