CN101735623B - A kind of warm mix epoxy asphalt material and preparation method thereof - Google Patents

Abstract

The invention relates to a warm-mixed epoxy asphalt material, which includes two components, A and B. The A component is epoxy resin, and the B component includes: 40-83 parts by weight of asphalt, and 5-20 parts by weight of maleic anhydride. 10-30 parts by weight of 9-octadecenylamine, 2-10 parts by weight of polysebacic anhydride or polyazebaic anhydride; the mass ratio of component A to component B is 1:3-5.8. The prepared warm-mixed epoxy asphalt material of the present invention has the advantages of good adhesion, high strength, high heat resistance, and high fatigue life; in addition, when using the warm-mixed epoxy asphalt material of the present invention for pavement construction, due to Medium-temperature mixing can effectively reduce construction gas emissions; at the same time, applying the warm-mix epoxy asphalt material of the present invention to pavement construction can also solve the problem of short operation time of general epoxy asphalt.

Description

A kind of warm mix epoxy asphalt material and preparation method thereof

technical field

The invention relates to a warm-mix asphalt mixture, in particular to a warm-mix epoxy asphalt material and a preparation method thereof.

Background technique

The traditional hot-mix asphalt mixture (HMA) is a hot-mix hot-paving material, which requires high temperature during mixing, paving and rolling. The process of production and construction consumes a lot of energy, and the asphalt is thermally aged and discharged. A large amount of exhaust gas and dust will affect the environment and the health of construction workers. In order to overcome the shortcomings of hot mix asphalt mixture, many warm mix asphalts have emerged. The common warm mix asphalt has the following characteristics: (1) Low asphalt mixture production and construction temperature is about 30 ℃ ~ 50 ℃, which can save energy consumption by 20% Above, reduce the impact of vibratory rollers on bridges and building structures along the line; (2) reduce emissions. Warm asphalt mixture can greatly reduce the type and amount of gas emissions during the asphalt mixture mixing process. Generally, every time the mixing temperature is lowered by 10°C, the emissions of asphalt smoke and _CO2 will be halved accordingly, reducing gas emissions , Generally, it can save 30% to 50% of the indirect cost of the asphalt mixing plant, and reduce the damage of harmful gases to the construction personnel; (3) prolong the construction period of the asphalt pavement and expand the scope of application. Since the construction temperature of warm-mix asphalt mixture is lower than that of hot-mix asphalt mixture, warm-mix asphalt mixture has great application advantages when the ambient temperature is low and the temperature loss is rapid, thus greatly extending the construction period of asphalt pavement. Even winter construction is possible; the lower mixing, paving and rolling temperatures of warm mix asphalt are particularly suitable for the application of asphalt concrete in tunnel pavements.

Currently common warm mixing techniques are:

(1) Foamed asphalt warm mixing technology (WMA-Foam). This technology is jointly developed by British Shell (Shell) and Norway Kolo-Veidekke and has a patented two-stage method for producing warm asphalt mixture. This technology first uses soft asphalt to mix with stone materials, and the mixing temperature is controlled. At around 110°C.

(2) Zeolite (Aspha-Min) viscosity reduction technology. The construction temperature of this technology can be reduced by about 30°C, and the energy consumption will be reduced by about 30% for every 12°C reduction in production temperature. All binders whether asphalt or polymer modified binders as well as recycled bitumen can be used with Aspha-Min.

(3) Use asphalt fluidity modifier (such as Sasobit-Fischer-Tropsch wax) technology. Sasobit is a product of Sasol Wax in South Africa. Sasobit can reduce the viscosity of asphalt mixture through chemical reaction and reduce the production temperature by 18-54°C.

(4) Emulsified asphalt warm mixing technology (Evotherm). This technology is the Evotherm warm mix asphalt mixture based on emulsified asphalt dispersion technology being researched by Meadwestvaco in the United States. This technology uses a special emulsified asphalt instead of hot asphalt to achieve warm mixing, and its production process is basically the same as that of hot asphalt mixture. During the mixing process, the water in the emulsified asphalt is released in the form of water vapor, and the appearance and color of the warm mix asphalt mixture after mixing are similar to those of the hot mix asphalt mixture.

However, the warm mix asphalt mixture prepared by the above-mentioned technology often has shortcomings such as insufficient cohesive force, serious water damage, and poor high temperature resistance.

The research on warm-mix asphalt in my country started relatively late. In recent years, domestic patents on solving many problems of warm-mix asphalt have gradually increased, but the method of modifying with epoxy resin has not been mentioned yet.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies in the prior art and provide a warm-mixed epoxy asphalt material and a preparation method thereof. The invention adopts the modification method of epoxy resin and curing agent to prepare warm-mixed epoxy asphalt material with high strength, high heat resistance and long fatigue life, and the material is suitable for special road surfaces such as tunnel pavement and winter construction pavement.

The gist of the invention is to add epoxy resin to the asphalt for curing reaction to form a space network structure to increase the cohesive force of the asphalt.

The warm-mixed epoxy asphalt material of the present invention comprises two components, A and B, wherein the A component is an epoxy resin, and the B component comprises the following components:

Asphalt 40-83 parts by weight, preferably 60 parts by weight;

Maleic anhydride 5-20 parts by weight, preferably 15 parts by weight;

9-octadecenylamine 10-30 parts by weight, preferably 20 parts by weight;

Polysebacic anhydride or polyazalic anhydride 2 to 10 parts by weight, preferably 5 parts by weight;

The mass ratio of component A to component B is 1:3-5.8. If the above-mentioned four components all adopt preferred values, the mass ratio of component A to component B is 1:4.3.

The A component is selected from bisphenol A type epoxy resin, the grade is E-51.

The A component can also be a mixture of any two or more of bisphenol A epoxy resin E-54, epoxy resin E-52, epoxy resin E-51, and epoxy resin E-44, These four grades of bisphenol A epoxy resin can be substituted with equal quality, but the mass of epoxy resin E-44 shall not exceed 10% of the total mass of component A, and the proportion of other three epoxy resins in component A shall not exceed 10%. special requirements.

The preparation method of the warm-mixed epoxy asphalt material of the present invention is to mix A and B two components according to a conventional method to obtain a product, and the A and B two components are sealed and stored separately before mixing; wherein, the preparation of B component comprises the following steps :

(1) mixing maleic anhydride with asphalt;

(2) 9-octadecenylamine is added to the mixture of maleic anhydride and asphalt which has been mixed and continues to mix;

(3) adding polysebacic anhydride or polyazelaic acid when step (2) is carried out;

(4) The component B is prepared after the ingredients are mixed evenly.

In step (1), the maleic anhydride and the asphalt are mixed for 4 to 6 hours at an environment of 150°C.

In step (2), the mass of 9-octadecylamine added per minute is 2% of the total mass of component B, and the addition of 9-octadecylamine is completed before the temperature of the mixture drops to 90°C.

In step (3), polysebacic anhydride or polyazebaic anhydride is added to the mixture at one time.

The epoxy resin in the A component is the Chinese brand bisphenol A epoxy resin E-54, epoxy resin E-52, epoxy resin E-51, epoxy resin E-44, the higher the grade, the lower the viscosity , this type of bisphenol A epoxy resin structural formula is as follows:

Among them, n=0～1, the smaller the value of n, the higher the grade, the lower the viscosity; the larger the value of n, the lower the grade, the greater the viscosity.

The present invention recommends the use of epoxy resin E-51, because the output of this grade of epoxy resin in my country is large, the cost is relatively low, and it is a well-stirred liquid state at normal temperature, and the structural formula of epoxy resin E-51 is as shown in the figure below:

The structural formulas of maleic anhydride, 9-octadecenylamine, polysebacic anhydride and polyazelaic anhydride used in the B component are as follows:

Maleic anhydride:

9-octadecenylamine:

Polysebacic anhydride:

x is a real number greater than 0.

Polyazelaic anhydride:

x is a real number greater than 0.

The beneficial effects of the present invention are that: the warm-mix epoxy asphalt material prepared by the present invention has the advantages of good adhesion, high strength, high heat resistance, and high fatigue life; in addition, the warm-mix epoxy asphalt material of the present invention is applied During pavement construction, due to the use of medium-temperature mixing, the emission of construction gas can be effectively reduced; at the same time, the use of the warm-mix epoxy asphalt material of the present invention for pavement construction can also solve the problem of short operation time of general epoxy asphalt.

Detailed ways

The present invention is further explained below in conjunction with specific examples. The purpose of listing the examples is only to illustrate the present invention more specifically, and the protection scope of the present invention is not limited to the content described in the examples.

Example 1

The warm-mixed epoxy asphalt material prepared by the present invention is formed by mixing two components, A and B. The A component is a Chinese brand bisphenol A type epoxy resin E-51; the B component is composed of 60 parts by weight of pitch, 15 It is composed of maleic anhydride in parts by weight, 9-octadecenylamine (also known as oleylamine) in 20 parts by weight, and polysebacic anhydride in 5 parts by weight; before mixing, the two components A and B are separately sealed and stored.

The mass ratio of component A to component B is 1:4.3.

The main properties of epoxy resin E-51 in component A are shown in Table 1:

Table 1 Main properties of E-51 epoxy resin

chemical composition Viscosity(23℃)/(Pa·s) Epoxy equivalent/(g/eq) Organic modifier or solvent Cycloolefin epoxy liquid semi-solid 211～290 Contains active agents and organic solvents

The secondary properties of epoxy resin E-51 in component A are shown in Table 2:

Table 2 The secondary properties of E-51 epoxy resin

Density(23℃)/(g/cm ³ ) Additives features ≤1.10 none  Materials with prescribed flammability

The general quality standards of E-51 epoxy resin enterprises in my country are shown in Table 3:

Table 3 General Quality Standards for Enterprises of E-51 Epoxy Resin in my country

model Enterprise model Epoxy equivalent (g/eq) Epoxy value (eq/100g) Viscosity(25℃)/(Pa.s) E-51 618 185～208 0.48～0.54 ≤2.5 Softening point (℃) Color No. Organochlorine value (eq/100g) Volatile content (%) Inorganic chlorine value (eq/100g) - ≤2 0.02 ≤2 0.001

When preparing the epoxy asphalt of the present invention, attention should be paid to selection according to specifications.

The preparation steps of component B are as follows: first mix maleic anhydride and asphalt at 150°C for 5 hours, and after the mixing is completed and there is no peculiar smell and smoke, mix 9-octadecenylamine and poly Add sebacic anhydride to the mixture of maleic anhydride and asphalt that has been mixed and continue mixing. The quality of 9-octadecenylamine added per minute is 2% of the total mass of component B. With the addition of 9-octadecene The viscosity of asphalt will decrease when the amine is added, and the mixing temperature will also decrease. Before the temperature drops from 150°C to 90°C, add 9-octadecenylamine, and polysebacic anhydride can be added in 9-octadecenylamine Add it to the mixture at one time during the process.

When the warm-mixed epoxy asphalt material of the present invention is applied to the construction of the upper layer, it can be carried out as follows: the warm-mixed epoxy asphalt material that has been mixed is transported to the construction site with a dump truck, and the dump truck is covered with linoleum cloth for heat preservation; The car is docked with the paver for paving. After the paving is completed, the first rolling is carried out with an 8-10-ton road roller back and forth for 3 times. A 20-ton road roller rolls back and forth 3 times, and after re-pressing, ensure that the temperature is at 65±10°C. For the third rolling, an 8-10-ton road roller rolls back and forth 3 times, and the final pressure is completed before the road surface temperature drops to 45±10°C. .

The warm-mixed epoxy asphalt of the present invention can be used not only for the paving of the upper layer, but also for the paving of the middle surface layer, the lower layer or the flexible base layer.

The performance test of the warm-mix epoxy asphalt mixture designed in Example 1 according to the conventional Marshall design method is shown in Table 19.

Example 2

The warm-mixed epoxy asphalt material prepared by the present invention is formed by mixing two components, A and B. The A component is a Chinese brand bisphenol A type epoxy resin E-51; the B component is composed of 83 parts by weight of asphalt, 5 It consists of maleic anhydride in parts by weight, 9-octadecenylamine in 10 parts by weight, and polysebacic anhydride in 2 parts by weight; before mixing, the two components A and B are sealed and stored separately.

The mass ratio of component A to component B is 1:5.8.

The preparation steps of component B are as follows: first mix maleic anhydride and asphalt at 150°C for 6 hours, and after the mixing is completed and there is no peculiar smell and smoke, mix 9-octadecylamine and poly Add sebacic anhydride to the mixture of maleic anhydride and asphalt that has been mixed and continue mixing. The quality of 9-octadecenylamine added per minute is 2% of the total mass of component B. With the addition of 9-octadecene The viscosity of asphalt will decrease when the amine is added, and the mixing temperature will also decrease. Before the temperature drops from 150°C to 90°C, add 9-octadecenylamine, and polysebacic anhydride can be added in 9-octadecenylamine Add it to the mixture at one time during the process.

The performance test of the warm-mix epoxy asphalt mixture of Example 2 designed according to the conventional Marshall design method is shown in Table 19.

Example 3

The warm-mixed epoxy asphalt material prepared by the present invention is formed by mixing two components, A and B. The A component is a Chinese brand bisphenol A epoxy resin E-51; the B component is composed of 40 parts by weight of asphalt, 20 It consists of maleic anhydride in parts by weight, 9-octadecenylamine in 30 parts by weight, and polyazelaic anhydride in 10 parts by weight; before mixing, the two components A and B are sealed and stored separately.

The mass ratio of component A to component B is 1:3.

The preparation steps of component B are as follows: first mix maleic anhydride and asphalt at 150°C for 5 hours, and after the mixing is completed and there is no peculiar smell and smoke, mix 9-octadecenylamine and poly Add sebacic anhydride to the mixture of maleic anhydride and asphalt that has been mixed and continue mixing. The quality of 9-octadecenylamine added per minute is 2% of the total mass of component B. With the addition of 9-octadecene The viscosity of the asphalt will decrease when the amine is added, and the mixing temperature will also decrease. Before the temperature drops from 150°C to 90°C, add 9-octadecenylamine, and polysebacic anhydride can be added in 9-octadecenylamine Add it to the mixture all at once during the process.

The performance testing of the warm-mix epoxy asphalt mixture of Example 3 designed according to the conventional Marshall design method is shown in Table 19.

Example 4

The warm-mixed epoxy asphalt material prepared by the present invention is made by mixing two components A and B. The A component is the Chinese brand bisphenol A epoxy resin E-54, epoxy resin E-52, epoxy resin E -51. Epoxy resin E-44 is a mixture of four grades of epoxy resins, these four grades of epoxy resins account for 20%, 20%, 50%, and 10% of the total mass of A component respectively; B component consists of 60% It consists of asphalt in parts by weight, maleic anhydride in 15 parts by weight, 9-octadecylamine in 20 parts by weight, and polyazelaic anhydride in 5 parts by weight; before mixing, the two components A and B are sealed and stored separately.

The mass ratio of component A to component B is 1:4.3.

The preparation steps of component B are as follows: first mix maleic anhydride and asphalt at 150°C for 5 hours, and after the mixing is completed and there is no peculiar smell and smoke, mix 9-octadecenylamine and poly Add azelaic anhydride to the mixture of maleic anhydride and asphalt that has been mixed and continue mixing. The quality of 9-octadecenylamine added per minute is 2% of the total mass of component B. With the addition of 9-octadecene The viscosity of the asphalt will decrease when the amine is added, and the mixing temperature will also decrease. Before the temperature drops from 150°C to 90°C, add 9-octadecenylamine, and polyazelaic anhydride can be added in 9-octadecenylamine Add it to the mixture all at once during the process. Tables 4 to 12 list the characteristics and industry standards of bisphenol A epoxy resins E-54, E-52, and E-44 in sequence.

Table 4 The main properties of E-54 epoxy resin

chemical composition Viscosity(23℃)/(Pa·s) Epoxy equivalent/(g/eq) Organic modifier or solvent Cycloolefin epoxy liquid semi-solid 179～192 Contains active agents and organic solvents

Table 5 The secondary properties of E-54 epoxy resin

Density(23℃)/(g/cm ³ ) Additives Features ≤1.15 none  Materials with prescribed flammability

Table 6 General Quality Standards for Enterprises of E-54 Epoxy Resin in my country

model Enterprise model Epoxy equivalent (g/eq) Epoxy value (eq/100g) Viscosity(25℃)/(Pa.s) E-54 616 179～192 0.52～0.56 5～10 Softening point (℃) Color No. Organochlorine value (eq/100g) Volatile content (%) Inorganic chlorine value (eq/100g) - ≤2 0.02 ≤1.5 0.001

Table 7 The main properties of E-52 epoxy resin

chemical composition Viscosity(23℃)/(Pa·s) Epoxy equivalent/(g/eq) Organic modifier or solvent Cycloolefin epoxy liquid semi-solid 185～196 Contains active agents and organic solvents

Table 8 The secondary properties of E-52 epoxy resin

Density(23℃)/(g/cm ³ ) Additives Features ≤1.13 none  Materials with prescribed flammability

Table 9 General Quality Standards for Enterprises of E-52 Epoxy Resin in my country

model Enterprise model Epoxy equivalent (g/eq) Epoxy value (eq/100g) Viscosity(25℃)/(Pa.s) E-52 618 185～196 0.48～0.54 ≤2.5 Softening point (℃) Color No. Organochlorine value (eq/100g) Volatile content (%) Inorganic chlorine value (eq/100g) - ≤2 0.01 ≤2 0.001

Table 10 Main properties of E-44 epoxy resin

chemical composition Viscosity(23℃)/(Pa·s) Epoxy equivalent/(g/eq) Organic modifier or solvent Cycloolefin epoxy solid 213～244 Contains active agents and organic solvents

Table 11 The secondary properties of E-44 epoxy resin

Density(23℃)/(g/cm ³ ) Additives Features ≤1.10 none  Materials with prescribed flammability

Table 12 General Quality Standards for Enterprises of E-44 Epoxy Resin in my country

model Enterprise model Epoxy equivalent (g/eq) Epoxy value (eq/100g) Viscosity(25℃)/(Pa.s) E-44 6101 213～244 0.41～0.47 - Softening point (℃) Color No. Organochlorine value (eq/100g) Volatile content (%) Inorganic chlorine value (eq/100g) 12～20 ≤6 0.02 ≤1 0.001

The performance test of the warm-mix epoxy asphalt mixture of Example 4 designed according to the conventional Marshall design method is shown in Table 19.

Example 5

The warm-mixed epoxy asphalt material prepared by the present invention is made by mixing two components A and B, and the A component is a Chinese brand bisphenol A epoxy resin E-54, E-52, E-51, E-44 A mixture of four grades of epoxy resins, these four grades of epoxy resins account for 20%, 20%, 50%, and 10% of the total mass of A component respectively; B component consists of 83 parts by weight of asphalt, 5 parts by weight of Maleic anhydride, 10 parts by weight of 9-octadecenylamine, and 2 parts by weight of polyazelaic anhydride; before mixing, the two components A and B are sealed and stored separately.

The mass ratio of component A to component B is 1:5.8.

The preparation steps of component B are as follows: first mix maleic anhydride and asphalt at 150°C for 6 hours, and after the mixing is completed and there is no peculiar smell and smoke, mix 9-octadecylamine and poly Add azelaic anhydride to the mixture of maleic anhydride and asphalt that has been mixed and continue mixing. The quality of 9-octadecenylamine added per minute is 2% of the total mass of component B. With the addition of 9-octadecene The viscosity of the asphalt will decrease when the amine is added, and the mixing temperature will also decrease. Before the temperature drops from 150°C to 90°C, add 9-octadecenylamine, and polyazelaic anhydride can be added in 9-octadecenylamine Add it to the mixture at one time during the process.

According to the conventional Marshall design method, the performance test of the warm-mix epoxy asphalt mixture of Example 5 is shown in Table 19.

Example 6

The warm-mixed epoxy asphalt material prepared by the present invention is made by mixing two components A and B, and the A component is a Chinese brand bisphenol A epoxy resin E-54, E-52, E-51, E-44 A mixture of four grades of epoxy resins, these four grades of epoxy resins account for 20%, 20%, 50%, and 10% of the total mass of A component respectively; B component consists of 40 parts by weight of asphalt, 20 parts by weight of Maleic anhydride, 30 parts by weight of 9-octadecenylamine, and 10 parts by weight of polyazelaic anhydride; before mixing, the two components A and B are separately sealed and stored.

The mass ratio of component A to component B is 1:3.

The preparation steps of component B are as follows: first mix maleic anhydride and asphalt at 150°C for 5 hours, and after the mixing is completed and there is no peculiar smell and smoke, mix 9-octadecenylamine and poly Add sebacic anhydride to the mixture of maleic anhydride and asphalt that has been mixed and continue mixing. The quality of 9-octadecenylamine added per minute is 2% of the total mass of component B. With the addition of 9-octadecene The viscosity of asphalt will decrease when the amine is added, and the mixing temperature will also decrease. Before the temperature drops from 150°C to 90°C, add 9-octadecenylamine, and polysebacic anhydride can be added in 9-octadecenylamine Add it to the mixture at one time during the process.

The performance test of the warm-mix epoxy asphalt mixture of Example 6 designed according to the conventional Marshall design method is shown in Table 19.

Example 7

This example lists the application comparison between a common warm-mix asphalt mixture and the warm-mix epoxy asphalt material of the present invention. The warm-mixed epoxy asphalt material in this example is formed by mixing two components, A and B. The A component is a Chinese brand bisphenol A type epoxy resin E-51; the B component is composed of 60 parts by weight of asphalt, 15 parts by weight of maleic anhydride, 20 parts by weight of 9-octadecenylamine (also known as oleylamine), and 5 parts by weight of polysebacic anhydride; before mixing, the two components A and B are sealed and stored separately.

The mass ratio of component A to component B is 1:4.3.

Note: above-mentioned ratio is identical with embodiment 1.

According to the common warm mix asphalt technology, the Marshall design method is adopted. AC-13 is selected according to the JTGF40-2004 specification, and a finer gradation is adopted. Table 13 shows the selected AC-13 gradation.

Table 13 Mixing ratio of AC-13 mixture

particle size 16 13.2 9.5 4.75 2.36 1.18 0.6 0.3 0.15 0.075 Passing rate 100 92 71 50 33 20 14 9 7 5

When mixing, the temperature of the stone material and mineral powder is 115°C, and the temperature of the warm-mix epoxy asphalt material of the present invention is 105°C. heating).

The target void ratio of the warm-mix epoxy asphalt material of the present invention is 3%, and three kinds of asphalt ratios are selected: 6.0%, 6.5%, and 7.0%; the target void ratio of ordinary warm-mix asphalt mixture is 4%, and three kinds of asphalt ratios are selected: 5.5 %, 6.0%, and 6.5%; they were formed by Marshall compaction respectively, and the porosity calculation results are shown in Table 14:

Table 14 Determination of the asphalt ratio between the warm-mix epoxy asphalt material of the present invention and ordinary warm-mix asphalt mixture

Asphalt consumption (%) 5.5 6.0 6.5 7.0 Warm-mix epoxy asphalt material porosity (%) of the present invention - 4.3 3.6 2.9 Ordinary warm mix asphalt mixture void ratio (%) 5.4 4.6 3.8 -

The test finally selects 6.8% as the optimum asphalt ratio of the warm-mix epoxy asphalt material of the present invention, and 6.2% as the optimum asphalt ratio of ordinary warm-mix asphalt mixture. In the row of "asphalt dosage" in Table 14, for the warm-mix epoxy asphalt material of the present invention, it refers to the total dosage of components A and B.

101.6mm×63.5mm)和12个普通温拌沥青混合料标准马歇尔试件，表15表示的是本次试验中，本发明的温拌环氧沥青材料的马歇尔试验结果：According to the gradation and asphalt ratio determined by the Marshall design method before the test, 12 standard Marshall specimens (specimen size:

101.6mm * 63.5mm) and 12 common warm asphalt mixture standard Marshall test pieces, what table 15 expressed is in this test, the Marshall test result of the warm mix epoxy asphalt material of the present invention:

Table 15 Marshall test values of warm-mix epoxy asphalt material of the present invention and common warm-mix asphalt mixture

It takes several months for the warm-mixed epoxy asphalt of the present invention to fully solidify. Due to the limited time, the Marshall strength measured here and the following test results are all the results of curing at room temperature for 24h to 48h, but these results are all satisfactory. According to the requirements of JTGF40-2004, the strength after complete curing was not measured. Conditions on the pavement permit testing of its fully cured effect.

Warm mix asphalt is often used in tunnel pavement, and it is inevitable to encounter water accumulation. In addition, due to the lower temperature of warm mix asphalt, the coating performance of asphalt is not as complete as that of hot mix asphalt mixture. In this way, it is necessary to test its resistance. Water impairs performance. This embodiment continues to use the freeze-thaw splitting test as the water stability detection test.

The freeze-thaw splitting test adopts the T0729-2000 method in JTJ 052-2000, and Table 16 and Table 17 are the test results of the warm-mix epoxy asphalt material of the present invention and ordinary warm-mix asphalt mixture:

Table 16 The freeze-thaw splitting value of the warm-mixed epoxy asphalt material of the present invention

Table 17 Freeze-thaw splitting value of ordinary warm mix asphalt mixture

The TSR value of 91.9% shows that the warm-mix epoxy asphalt material of the present invention has good water damage resistance, which is 12 percentage points higher than the 82.3% of ordinary warm-mix asphalt mixture.

Warm mix asphalt mixture is mainly used for large-area pavement. Due to the low viscosity of warm mix asphalt, the viscosity of asphalt will decrease with the increase of temperature, so the high temperature stability of pavement is very important. In this example, the test piece is formed by the method T0703-1993 in JTJ 052-2000. After placing it at room temperature for 48 hours, the rutting test is carried out by the method T0729-2000 in JTJ 052-2000. Table 18 is the test data:

Table 18 Rutting test results

Type of mixture Dynamic stability (times/mm) Permanent deformation (mm) Relative Deformation% Warm-mix epoxy asphalt material of the present invention 4521 3.527 7.05 Ordinary warm mix asphalt mixture 2012 4.843 9.69

The dynamic stability of the warm-mix epoxy asphalt material of the present invention is much higher than that of ordinary warm-mix asphalt mixtures, indicating that the warm-mix epoxy asphalt of the present invention has good cohesive force and good ability to resist high-temperature rutting.

It can be seen from the above test results that the Marshall stability, freeze-thaw splitting strength and rutting dynamic stability of the warm-mix epoxy asphalt material of the present invention far exceed the requirements of JTGF40-2004.

According to the above-mentioned conventional mixture design method, the 24h Marshall stability, freeze-thaw splitting test and rutting test of Examples 1-6 were also carried out. The results are shown in Table 19.

Table 19 Six kinds of embodiment detection results

test Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 24h Marshall stability, KN 14.68 12.35 13.67 14.72 12.63 13.60 Dynamic split value, % 82.3 80.4 83.2 82.1 80.6 83.0 Dynamic stability, times/mm 4521 3611 3984 4602 3729 4012

Claims (6)

1. A warm-mixed epoxy asphalt material, comprising two components of A and B, wherein the A component is epoxy resin E-51 or epoxy resin E-54, epoxy resin E-52, epoxy resin The mixture of any two or more of E-51 and epoxy resin E-44, the mass of epoxy resin E-44 shall not exceed 10% of the total mass of component A; the component B includes the following components: Asphalt 40-83 parts by weight, Maleic anhydride 5-20 parts by weight, 9-octadecenylamine 10-30 parts by weight, Polysebacic anhydride or polyazebaic anhydride 2 to 10 parts by weight; The B component needs to be prepared according to the following steps: (1) mixing maleic anhydride with asphalt; (2) 9-octadecenylamine is added to the mixture of maleic anhydride and asphalt which has been mixed and continues to mix; (3) adding polysebacic anhydride or polyazebaic anhydride when step (2) is carried out; (4) Component B is prepared after the components are uniformly mixed, and the mass ratio of the A component to the B component is 1:3-5.8. 2. The preparation method of the warm-mix epoxy asphalt material described in claim 1 is to mix the A component with the pre-prepared B component. 3. the preparation method of warm-mix epoxy asphalt material according to claim 2, is characterized in that, the preparation of B component comprises the steps: (1) mixing maleic anhydride with asphalt; (2) 9-octadecenylamine is added to the mixture of maleic anhydride and asphalt which has been mixed and continues to mix; (3) adding polysebacic anhydride or polyazebaic anhydride when step (2) is carried out; (4) The component B is prepared after the ingredients are mixed evenly. 4. The preparation method of warm-mixed epoxy asphalt material according to claim 3, characterized in that, in step (1), maleic anhydride and asphalt are mixed at 150° C. for 4 to 6 hours. 5. the preparation method of warm-mixing epoxy asphalt material according to claim 3 is characterized in that, in step (2), the quality that 9-octadecylamine adds per minute is 2% of B component gross mass, And the addition of 9-octadecenylamine was completed before the temperature of the mixture dropped to 90°C. 6. The preparation method of warm-mix epoxy asphalt material according to claim 3, characterized in that, in step (3), polysebacic anhydride or polyazebaic anhydride is added to the mixture at one time. the