CN102816448B - Warm-mixing heavy traffic asphalt and preparation method thereof - Google Patents

Abstract

The invention provides a warm mix asphalt and a preparation method thereof, in particular to a warm mix heavy traffic asphalt and a preparation method thereof. The present invention adds a warm mixing agent to the base asphalt, without changing the key technical indicators of heavy traffic asphalt, viscoelastic properties and rheological properties of the asphalt, can reduce the mixing and paving temperature by 20-40°C, and achieve energy saving and reduction. The purpose of reducing carbon emissions; and its warm asphalt has good chemical stability and thermal stability, and the asphalt mixture prepared by using it has better mechanical properties.

Description

Warm mix heavy traffic asphalt and preparation method thereof

technical field

The invention provides a warm mix asphalt and a preparation method thereof, in particular to a warm mix heavy traffic asphalt and a preparation method thereof.

Background technique

At present, there are two main types of asphalt mixtures used for asphalt pavement construction and maintenance: hot mix asphalt mixture (HMA) and cold mix (normal temperature) asphalt mixture (CMA). The mixing temperature of asphalt and mineral aggregate in hot mix asphalt mixture is 150℃～185℃; in cold mix (normal temperature) asphalt mixture, emulsified asphalt or diluted asphalt is used as cementing material, which is mixed with mineral aggregate at normal temperature (10℃～40℃) Stir and pave under the state. HMA has become the mainstream pavement technology due to its excellent road performance, but problems such as thermal aging of asphalt, exhaust gas and dust emissions, increased energy consumption and increased production costs caused by high-temperature mixing, transportation and paving have plagued the road. Although cold-mix asphalt mixture has the advantages of environmental protection and energy saving, its road performance is poor, and it can only be used for the maintenance of asphalt pavement, low-traffic pavement, and the lower layer and base layer of medium-heavy traffic pavement. In view of this, warm mix asphalt mixture technology came into being, aiming at realizing the clean production of asphalt mixture and seeking a low-carbon and green development path.

Warm mixing technology has obvious advantages in energy saving and emission reduction. According to statistics, with hot paving, about 16 kg of standard coal is consumed per ton of asphalt mixture, which is equivalent to about 48 kg of carbon dioxide emissions. If mixing and paving at 40°C is lowered, about 2.5 kg of standard coal can be saved per ton of asphalt mixture, and about 7.5 kg of carbon dioxide emissions can be reduced. By 2011, my country's asphalt consumption was 17 million tons. If 60% of the asphalt is mixed and paved with cooling, it can save about 510,000 tons of standard coal and reduce carbon dioxide emissions by about 1.53 million tons, which is quite a considerable amount. Therefore, the current domestic warm mixing technology is also developing rapidly.

At present, although there are many warm-mix technologies that can successfully produce warm-mix modified asphalt, these technologies have good adaptability to modified asphalt, but poor adaptability to heavy traffic asphalt, which often leads to changes in the three major indicators of asphalt However, it is impossible to realize warm-mix heavy-duty asphalt. In addition, due to price reasons, most pavement asphalt mixtures use heavy-duty asphalt as a binder, and the amount of modified asphalt used as a binder is still far less than that of heavy-duty asphalt. With greater advantages, it is an urgent problem to produce finished warm-mix heavy-duty asphalt without changing the key technical indicators of asphalt.

Contents of the invention

In view of the above problems, the present invention proposes a warm-mix heavy-duty asphalt and a preparation method thereof. The warm-mix heavy-duty asphalt involved in the present invention does not change the key technical indicators of the matrix asphalt and the rheological properties within the use temperature range. The warm-mix asphalt has good chemical stability and thermal stability, and can realize the mixing of heavy-duty asphalt mixtures. And the compaction temperature is reduced by 20-40°C, and the road performance and mechanical properties of the asphalt mixture are not attenuated.

The warm mix asphalt described in the present invention is calculated by weight percentage, and its raw material composition is 0.3-0.6% of warm mix agent, and the balance is matrix asphalt.

Wherein, in parts by weight, the raw material composition of the warm mixing agent is 8-10 parts of heavy aromatic hydrocarbons, 50-60 parts of tall oil carboxylic acid polyamine, 15-20 parts of coconut oil fatty acid diethanolamide, allyl alcohol 10-15 parts of polyoxyalkyl ether, 0-5 parts of other substrates.

As a matrix solvent, heavy aromatics can dissolve different surfactants well, so that different surfactants can be completely miscible, but the amount should not be too much, too much will affect the quality of warm mixing agent, so heavy aromatics in the present invention Account for 8-10 parts, preferably 10 parts. Because the oil extracted from the fourth line is a non-ideal component in the production of lubricating oil, the price is relatively cheap compared to other heavy aromatics oils, the aromatics content is greater than 75%, and the source is also relatively wide, so the heavy aromatics described in the present invention is reduced. Four lines to extract the oil.

The present invention does not adopt the traditional cationic surfactant usually used in the preparation process of the warm mix agent but adopts the cationic surfactant tall oil polyamide. This is because tall oil carboxylic acid polyamine is an industrial intermediate, which is prepared from waste tall oil in the paper industry. Using this industrial intermediate to make compound asphalt warm mix agent can not only reduce the cost, but also has certain advantages. environmental advantages. It is compounded with an appropriate non-ionic surfactant, which has a synergistic effect, improves the ability of the surfactant to reduce interfacial tension, enables asphalt to be coated with aggregate at a lower temperature and improves the viscosity-temperature characteristics of asphalt. In addition, the compound The final warm mix agent is both oil-soluble and water-soluble, has stable storage performance, and does not affect the technical properties of asphalt. The tall oil carboxylate polyamine that adopts among the present invention is to buy from market.

The inventor found in the research of asphalt warm mix agent that: the pH value of perchlorate is too low, it only plays the role of anti-stripping agent, increases the adhesion between asphalt and aggregate, the effect of warm mix is not obvious, and the cooling rate is low. And damage the high-temperature performance of asphalt mixture; if the perchloric acid-base value is too high, the condensation reaction between the warm mix agent and the acidic components in the asphalt will cause the low-temperature performance of asphalt to decrease; while the perchloric acid-base value is moderate. The influence of technical properties is small, and the warm mixing effect of asphalt mixture is better. Therefore, there are certain requirements for the perchloric acid-base value of the warm mix agent. On the one hand, ensure that the warm mix agent does not affect the rheological characteristics and road performance of asphalt, and reduce the interfacial tension between asphalt and aggregate, and reduce the interfacial tension between the two. The interfacial energy enables the asphalt mixture to be mixed and compacted at a lower temperature; on the other hand, the warm mix agent has a higher alkali value, which can act like an anti-stripping agent and increase the adhesion between asphalt and aggregates. Adhesion, improve the water stability of asphalt mixture.

Although the cationic surfactants commonly used in the prior art of the art have other amine salt types and have certain perchloric acid-base value, the inventor has found that these cationic surfactants can reduce the surface tension and the resistance to asphalt after a long period of exploration. The impact of the index is limited. After compounding, the cooling range of the warm mix agent is not obvious, and some react with the molecules in the asphalt, which will have a certain impact on the technical properties of the asphalt and damage the road performance of its warm mix asphalt mixture.

The contriver finds, in the present invention, tall oil polyamine and coconut oil fatty acid diethanol amide composite can effectively improve the ability of surfactant aspect reducing interfacial tension, and tall oil carboxylic acid polyamine complex coconut oil fatty acid diethanol Amides can jointly improve the perchloric acid-base value of the warm mixing agent, so the consumption of tall oil carboxylic acid polyamines in the present invention is 50-60 parts, based on the relatively high price of coconut oil fatty acid diethanol amide, its consumption is limited to 15 In the range of -20 parts, control the perchloric pH value of the warm mix agent at 1.0-3.0, preferably 2.5, so as not to change the key technical indicators of asphalt, but to improve the lubrication and adhesion of asphalt binder in the asphalt mixture mixing process Features, play a certain role in anti-stripping agent, and has a certain price advantage.

In addition, coconut oil fatty acid diethanolamide is a non-ionic surfactant, which is very soluble in water and can be completely dissolved in different types of surfactants at a certain concentration. When polyoxyalkyl ether is compatible, it can increase the adsorption performance of warm mix agent and stone, and increase the adhesion characteristics of asphalt. Tal oil carboxylic acid polyamine compounded with coconut oil fatty acid diethanolamide can jointly increase the perchloric pH value of the warm mix agent, but based on the relatively high price of coconut oil fatty acid diethanolamide, its dosage is limited to 15-20 parts Within the range, preferably 20 parts.

As an effective wetting agent, allyl alcohol polyoxyalkyl ether can improve the wetting condition of warm-mix asphalt on the surface of aggregate, improve the coating of asphalt on the surface of aggregate, increase the adsorption of asphalt on the surface of aggregate, and then improve the The interfacial properties of aggregates can improve the adhesion characteristics of asphalt and aggregates. In addition, it can improve the viscosity-temperature characteristics, thermo-oxidative stability, and low-temperature performance of asphalt. The inventors have found through long-term tests that the best effect can be obtained when the dosage is 10-15 parts, preferably 15 parts.

The specific steps of the warm-mix heavy-duty asphalt described in the present invention are:

(1) Slowly add allyl alcohol polyoxyalkyl ether, coconut oil fatty acid diethanolamide, tall oil carboxylic acid polyamine to the heavy aromatic hydrocarbon under stirring condition at 245-255°C, after adding, keep stirring for 3- 4h;

(2) Stir and cool the above mixture to 120-125°C, stop stirring, and cool to 60-65°C to obtain a warm mixing agent for use;

(3) Weigh the base asphalt in proportion and heat it to a fluid state, and add warm mix agent in proportion to it;

(4) Stir the above mixture at 160-170°C for 30-40 minutes to obtain warm-mixed heavy-duty asphalt.

In the present invention, the inventors explored the proportion of warm mix agent and base asphalt, and the specific results are shown in Table 1. The percentages in Table 1 all refer to the mass percentage of warm mix agent in warm mix heavy traffic asphalt.

Table 1 Comparison of the dosage of different warm mixing agents

project 0.2% 0.3% 0.4% 0.5% 0.6% 0.7% Base bitumen Penetration (25℃, 100g, 5s) /0.1mm 67.85 67.1 66.63 69.53 70.12 71.15 67.10 Ductility (5cm/min, 10℃)/cm 57.48 55.48 49.52 42.90 39.15 35.10 59.07 Softening point (ring and ball method)/ ℃ 47.10 47.12 46.84 46.91 47.1 47.5 47.4 Dynamic viscosity(60℃)/ Pa·S 260.2 262.1 265.6 280.6 295.6 301.3 265.6

It can be seen from Table 1 that when the mass percentage of warm mix agent is 0.3-0.6%, the three major indicators of warm mix heavy traffic asphalt do not change significantly, but the viscosity at 60°C increases significantly, which shows that warm mix agent mixed If the amount of the asphalt is controlled within this range, the high temperature performance of the asphalt will increase, but the ductility will not change much, which means that the low temperature performance of the asphalt itself will not be affected; if the amount of warm mix is too large, the ductility index will tend to decrease; If the dosage is too low, the cooling range of warm mix asphalt mixture is small, and the warm mix effect is not obvious; therefore, the best mass percentage of warm mix agent is 0.3-0.6%.

The present invention investigates the stability of the prepared warm-mix heavy-duty asphalt, wherein the mass percentage of the warm-mix agent is 0.4%. The changes in key indicators of warm-mix asphalt preparation were detected for 4 hours, 10 days, and 20 days. The specific results are shown in Table 2. The storage temperature of warm-mix asphalt is 140-150°C.

Table 2 Thermal storage stability test of warm mix asphalt

project unit skills requirement asphalt 4h 10 days 20 days Penetration (25℃, 100g, 5s) 0.1mm 60-80 70 69 71 70.5 Ductility (5cm/min, 10℃) cm ≥20 49 38 40 39.8 Softening Point (Ring and Ball Method) ℃ ≥45 47.5 47 46.9 46.5 Dynamic viscosity (60℃) Pa·S ≥180 258 256 255 260

It can be seen from Table 2 that the key indicators of warm-mix asphalt basically do not change, so it has a good heat storage effect.

Warm mix asphalt mixture is prepared by using the warm mix heavy traffic asphalt described in the present invention as cementing material, and the preparation of warm mix asphalt mixture complies with the requirements of my country's "Technical Specifications for Construction of Highway Asphalt Pavement" F40-2004. In order to highlight the technical advantages of warm mix asphalt mixture, hot mix asphalt mixture and warm mix asphalt mixture adopt the same gradation composition and asphalt dosage, and warm mix asphalt mixture only reduces the aggregate heating temperature and asphalt heating temperature. The type of asphalt mixture is continuous dense graded asphalt mixture AC-20, and the original asphalt is domestic 70#A petroleum asphalt.

Table 3 Comparison of warm mix and hot mix AC-20 asphalt mixture

project unit skills requirement Hot Mix AC-20 Warm Mix AC-20 asphalt heating temperature ℃ 160 130 aggregate heating temperature ℃ 160 130 Stirring temperature ℃ 155 125 Molding temperature ℃ 150-155 125-130 bitumen content % 4.4 4.4 porosity % 4-6 3.55 3.80 Marshall stability KN >8 12.12 12.49 flow value mm 2-4 1.88 2.14 Rutting dynamic stability (60℃, 0.7MPa) times/min ≥800 1473 1403 freeze-thaw splitting strength ratio % ≥70 72 73 Low temperature bending failure strain (-10℃, 5cm/min) με ≥2000 2013 2101

Table 3 shows the indoor temperature control range for preparing warm-mix AC-20 and hot-mix AC-20. The cooling range of asphalt is 30°C, and the cooling range of aggregate is 30°C. Therefore, the mixing and paving temperature of warm-mix asphalt mixture can be adjusted Realize the cooling of 20-40 ℃. In addition, the rutting stability and freeze-thaw splitting strength of warm mix asphalt mixture AC-20 and hot mix asphalt mixture AC-20 with 30°C cooling of asphalt, 30°C cooling of aggregate, and 0.4% warm mix agent Compared with the low-temperature bending failure strain, no obvious change occurs, that is to say, the road performance of warm-mix asphalt does not change due to the addition of warm-mix agent, and the addition of warm-mix agent does not damage the high-temperature stability and low-temperature crack resistance of asphalt mixture. properties and water stability, but there is a tendency to improve.

In summary, the rheological properties of the warm-mixed heavy-duty asphalt described in the present invention do not change within the operating temperature range, and only by reducing the interfacial tension between the asphalt and the aggregate, the mixing and paving temperature of the asphalt mixture can be reduced by 20- 40℃, and its warm mix asphalt has good chemical stability and thermal stability, and the mechanical properties of the asphalt mixture prepared by using it are better.

Detailed ways

Example 1

A warm-mix heavy-duty asphalt, in terms of weight percentage, its raw material composition is 0.3% of warm-mix agent, and the balance is base asphalt.

In parts by weight, the raw materials of the warm mixing agent are composed of 8 parts of heavy aromatics, 55 parts of tall oil carboxylic acid polyamine, 17 parts of coconut oil fatty acid diethanolamide, and 12 parts of allyl alcohol polyoxyalkyl ether.

The perchloric acid-base value of described warm mixing agent is 2.5.

The heavy aromatics mentioned above are oil extracted from the minus four lines.

The specific preparation steps of the warm-mix heavy-duty asphalt are:

(1) Slowly add allyl alcohol polyoxyalkyl ether, coconut oil fatty acid diethanolamide, and tall oil carboxylic acid polyamine to the heavy aromatic hydrocarbon under stirring conditions at 245°C, and keep stirring for 3 hours after adding;

(2) Stir and cool the above mixture to 120°C, stop stirring, and cool to 62°C to obtain a warm mixing agent for use;

(3) Weigh the base asphalt in proportion and heat it to a fluid state, and add warm mix agent in proportion to it;

(4) Stir the above mixture at 165°C for 37 minutes to obtain warm-mix heavy-duty asphalt.

The key technical indicators of the warm-mixed heavy-duty asphalt prepared in this example are all within the scope of relevant technical requirements; the warm-mixed heavy-duty asphalt is used as the cement to prepare the warm-mixed asphalt mixture, and the mixing and paving can be achieved at a temperature lowered by 30°C. Other technical indicators are within the scope of relevant technical requirements.

Example 2

A warm-mix heavy-duty asphalt, in terms of weight percentage, its raw material composition is 0.4% of warm-mix agent, and the balance is base asphalt.

In parts by weight, the raw materials of the warm mixing agent are composed of 10 parts of heavy aromatic hydrocarbons, 50 parts of tall oil carboxylic acid polyamine, 20 parts of coconut oil fatty acid diethanolamide, and 15 parts of allyl alcohol polyoxyalkyl ether.

The perchloric acid-base value of described warm mixing agent is 1.0.

The heavy aromatics mentioned above are oil extracted from the minus four lines.

The specific preparation steps of the warm-mix heavy-duty asphalt are:

(1) Slowly add allyl alcohol polyoxyalkyl ether, coconut oil fatty acid diethanolamide, and tall oil carboxylic acid polyamine to the heavy aromatic hydrocarbon under stirring conditions at 247°C, and keep stirring for 4 hours after adding;

(2) Stir and cool the above mixture to 125°C, stop stirring, and cool to 63°C to obtain a warm mixing agent for use;

(3) Weigh the base asphalt in proportion and heat it to a fluid state, and add warm mix agent in proportion to it;

(4) Stir the above mixture at 170°C for 33 minutes to obtain warm-mix heavy-duty asphalt.

The key technical indicators of the warm-mixed heavy-duty asphalt prepared in this example are all within the scope of relevant technical requirements; the warm-mixed heavy-duty asphalt is used as the cement to prepare the warm-mixed asphalt mixture, and the mixing and paving can be achieved at a temperature lowered by 35°C. Other technical indicators are within the scope of relevant technical requirements.

Example 3

A warm-mix heavy-duty asphalt, in terms of weight percentage, its raw material composition is 0.5% of warm-mix agent, and the balance is base asphalt.

In parts by weight, the raw materials of the warm mixing agent are composed of 9 parts of heavy aromatics, 60 parts of tall oil carboxylic acid polyamine, 15 parts of coconut oil fatty acid diethanolamide, and 10 parts of allyl alcohol polyoxyalkyl ether.

The perchloric acid-base value of described warm mixing agent is 3.0.

The heavy aromatics mentioned above are oil extracted from the minus four lines.

The specific preparation steps of the warm-mix heavy-duty asphalt are:

(1) Slowly add allyl alcohol polyoxyalkyl ether, coconut oil fatty acid diethanolamide, and tall oil carboxylic acid polyamine to the heavy aromatic hydrocarbon under stirring conditions at 249°C, and keep stirring for 3.5 hours after adding;

(2) Stir and cool the above mixture to 121°C, stop stirring, and cool to 61°C to obtain a warm mixing agent for use;

(3) Weigh the base asphalt in proportion and heat it to a fluid state, and add warm mix agent in proportion to it;

(4) Stir the above mixture at 160°C for 40 minutes to obtain warm-mix heavy-duty asphalt.

The key technical indicators of the warm-mixed heavy-duty asphalt prepared in this example are all within the scope of relevant technical requirements; the warm-mixed heavy-duty asphalt is used as the cement to prepare the warm-mixed asphalt mixture, and the mixing and paving at a temperature of 37°C can be realized. Other technical indicators are within the scope of relevant technical requirements.

Example 4

A warm-mix heavy-duty asphalt, in terms of weight percentage, its raw material composition is 0.6% of warm-mix agent, and the balance is base asphalt.

In parts by weight, the raw materials of the warm mixing agent are composed of 8.5 parts of heavy aromatics, 52.5 parts of tall oil carboxylic acid polyamine, 16 parts of coconut oil fatty acid diethanolamide, and 11 parts of allyl alcohol polyoxyalkyl ether.

The perchloric acid-base value of described warm mixing agent is 2.2.

The heavy aromatics mentioned above are oil extracted from the minus four lines.

The specific preparation steps of the warm-mix heavy-duty asphalt are:

(1) Slowly add allyl alcohol polyoxyalkyl ether, coconut oil fatty acid diethanolamide, and tall oil carboxylic acid polyamine to the heavy aromatic hydrocarbon under stirring condition at 255°C. After the addition is completed, keep stirring for 4 hours;

(2) Stir and cool the above mixture to 122°C, stop stirring, and cool to 65°C to obtain a warm mixing agent for use;

(3) Weigh the base asphalt in proportion and heat it to a fluid state, and add warm mix agent in proportion to it;

(4) Stir the above mixture at 167°C for 30 minutes to obtain warm-mixed heavy-duty asphalt.

The key technical indicators of the warm-mixed heavy-duty asphalt prepared in this example are all within the scope of relevant technical requirements; the warm-mixed heavy-duty asphalt is used as the cement to prepare the warm-mixed asphalt mixture, and the mixing and paving at a temperature of 27 ° C can be realized. Other technical indicators are within the scope of relevant technical requirements.

Example 5

A warm-mix heavy-duty asphalt, in terms of weight percentage, its raw material composition is 0.5% of warm-mix agent, and the balance is base asphalt.

In parts by weight, the raw materials of the warm mixing agent are composed of 9.5 parts of heavy aromatics, 57.5 parts of tall oil carboxylic acid polyamine, 18 parts of coconut oil fatty acid diethanolamide, and 13 parts of allyl alcohol polyoxyalkyl ether.

The perchloric acid-base value of described warm mixing agent is 2.7.

The heavy aromatics mentioned above are oil extracted from the minus four lines.

The specific preparation steps of the warm-mix heavy-duty asphalt are:

(1) Slowly add allyl alcohol polyoxyalkyl ether, coconut oil fatty acid diethanolamide, and tall oil carboxylic acid polyamine to the heavy aromatic hydrocarbon under stirring conditions at 251°C. After the addition is complete, keep stirring for 3 hours;

(2) Stir and cool the above mixture to 123°C, stop stirring, and cool to 60°C to obtain a warm mixing agent for use;

(3) Weigh the base asphalt in proportion and heat it to a fluid state, and add warm mix agent in proportion to it;

(4) Stir the above mixture at 162°C for 35 minutes to obtain warm-mixed heavy-duty asphalt.

The key technical indicators of the warm-mixed heavy-duty asphalt prepared in this example are all within the scope of relevant technical requirements; the warm-mixed heavy-duty asphalt is used as the cement to prepare the warm-mixed asphalt mixture, and the mixing and paving at a temperature lowered by 33°C can be achieved. Other technical indicators are within the scope of relevant technical requirements.

Example 6

A warm-mix heavy-duty asphalt, in terms of weight percentage, its raw material composition is 0.5% of warm-mix agent, and the balance is base asphalt.

In parts by weight, the raw materials of the warm mixing agent are composed of 10 parts of heavy aromatics, 55 parts of tall oil carboxylic acid polyamine, 20 parts of coconut oil fatty acid diethanolamide, and 15 parts of allyl alcohol polyoxyalkyl ether.

The perchloric acid-base value of described warm mixing agent is 2.5.

The heavy aromatics mentioned above are oil extracted from the minus four lines.

The specific preparation steps of the warm-mix heavy-duty asphalt are:

(1) Slowly add allyl alcohol polyoxyalkyl ether, coconut oil fatty acid diethanolamide, and tall oil carboxylic acid polyamine to the heavy aromatic hydrocarbon under stirring conditions at 251°C. After the addition is complete, keep stirring for 3 hours;

(2) Stir and cool the above mixture to 123°C, stop stirring, and cool to 60°C to obtain a warm mixing agent for use;

(3) Weigh the base asphalt in proportion and heat it to a fluid state, and add warm mix agent in proportion to it;

(4) Stir the above mixture at 162°C for 35 minutes to obtain warm-mixed heavy-duty asphalt.

The key technical indicators of the warm-mix heavy-duty asphalt prepared in this example are all within the scope of relevant technical requirements; the warm-mix heavy-duty asphalt is used as the cement to prepare the warm-mix asphalt mixture, and the mixing and paving at a temperature lowered by 40°C can be realized. Other technical indicators are within the scope of relevant technical requirements.

Claims (5)

1. A warm-mix heavy-duty asphalt, characterized in that: by weight percentage, its raw material consists of warm mix agent 0.3-0.6%, and the balance is base asphalt; In parts by weight, the raw material composition of the warm mixing agent is: 8-10 parts of heavy aromatic hydrocarbons, 50-60 parts of tall oil carboxylic acid polyamine, 15-20 parts of coconut oil fatty acid diethanolamide, allyl alcohol polyamine 10-15 parts of oxyalkyl ether; The perchloric acid-base value of the warm mixing agent is 1.0-3.0. 2. the warm-mixed heavy-duty asphalt according to claim 1 is characterized in that by weight, the raw material of described warm-mixing agent consists of: 10 parts of heavy aromatics, 55 parts of tall oil carboxylic acid polyamines, coconut oil 20 parts of oleic acid diethanolamide, 15 parts of allyl alcohol polyoxyalkyl ether. 3. The warm-mix heavy-duty asphalt according to claim 1, characterized in that: the perchlorate pH value of the warm-mix agent is 2.5. 4. The warm-mixed heavy-duty asphalt according to claim 1, characterized in that: the heavy aromatics are extracted oil from the four-minus line. 5. prepare the described warm-mix heavy-duty asphalt of claim 1, it is characterized in that: its specific steps are: (1) Slowly add allyl alcohol polyoxyalkyl ether, coconut oil fatty acid diethanolamide, tall oil carboxylic acid polyamine to the heavy aromatic hydrocarbon under stirring condition at 245-255°C, after adding, keep stirring for 3- 4h; (2) Stir and cool the above mixture to 120-125°C, stop stirring, and cool to 60-65°C to obtain a warm mixing agent for use; (3) Weigh the base asphalt in proportion and heat it to a fluid state, and add warm mix agent in proportion to it; (4) Stir the above mixture at 160-170°C for 30-40 minutes to obtain warm-mixed heavy-duty asphalt; Wherein, in parts by weight, the raw material composition of the warm mixing agent is: 8-10 parts of heavy aromatic hydrocarbons, 50-60 parts of tall oil carboxylic acid polyamine, 15-20 parts of coconut oil fatty acid diethanolamide, allyl 10-15 parts of alcohol polyoxyalkyl ether; The perchloric acid-base value of the warm mixing agent is 1.0-3.0.