High-viscosity recycled asphalt mortar based on rich-oil RAP fine material and preparation method thereof

Abstract

The application discloses a high-viscosity recycled asphalt mortar based on oil-rich RAP fine materials and a preparation method thereof, and belongs to the technical field of highway engineering materials. The high-viscosity recycled asphalt mortar comprises the following components: oil-rich RAP fine materials, base asphalt, a high-viscosity modifier, a recycling agent and a dissolving agent. The high-viscosity modifier comprises the following components: waste tire rubber powder grafted with GMA (glycidyl methacrylate), BMI (bismaleimide), an adhesive, isooctanol polyoxyethylene ether and sulfur. The waste tire rubber powder grafted with GMA can improve the interfacial bonding strength of the oil-rich RAP fine materials and the base asphalt, thereby improving the water damage resistance of the recycled asphalt mixture. The BMI forms an interpenetrating structure (crosslinking network) among the rubber powder, the oil-rich RAP fine materials and the base asphalt, thereby improving the crack resistance of the recycled asphalt mixture.

Description

Technical Field

[0001] This invention relates to a high-viscosity recycled asphalt mortar based on oil-rich RAP fine aggregate and its preparation method, belonging to the technical field of highway engineering materials. Background Technology

[0002] Existing high-viscosity recycled asphalt mixtures often improve water loss resistance by adding high-viscosity modifiers to the asphalt, but they fail to consider the integration of new and old asphalt in the recycled mixture. However, the integration of new and old asphalt in recycled mixtures is a key factor affecting its performance. Old asphalt loses its lightweight components, becoming hard and brittle, making it difficult for new asphalt to penetrate under conventional processes. Therefore, using only high-viscosity modifiers is insufficient to effectively improve the performance of aged asphalt; it can only improve the performance of new asphalt, resulting in limited performance enhancement of recycled asphalt mixtures. Summary of the Invention

[0003] The purpose of this invention is to provide a high-viscosity recycled asphalt mortar based on oil-rich RAP fine aggregate and its preparation method. By adding waste tire rubber powder grafted with GMA, the interfacial bonding strength between the oil-rich RAP fine aggregate and the base asphalt is improved, thereby enhancing its resistance to water loss. Furthermore, BMI is used to form an interpenetrating structure (cross-linked network) between the rubber powder, the oil-rich RAP fine aggregate, and the base asphalt, thereby improving crack resistance.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] A high-viscosity recycled asphalt mortar based on oil-rich RAP fine aggregate comprises the following components in parts by weight: 50-70 parts oil-rich RAP fine aggregate, 20-40 parts base asphalt, 7-15 parts high-viscosity modifier, 0.1-0.8 parts recycling agent, and 0.1-0.5 parts solvent accelerator.

[0006] The high-viscosity modifier includes the following components in parts by weight: 40-70 parts of waste tire rubber powder grafted with GMA, 2-5 parts of BMI (bismaleimide), 15-35 parts of adhesive, 10-20 parts of isooctanol polyoxyethylene ether, and 3-8 parts of sulfur.

[0007] The above-mentioned method for preparing high-viscosity recycled asphalt mortar based on oil-rich RAP fine aggregate involves first placing the base asphalt in a container and heating it, then dry mixing waste tire rubber powder grafted with GMA with BMI, along with adhesive, isooctanol polyoxyethylene ether and sulfur, into the container, stirring evenly, and then shearing and developing to obtain high-viscosity modified asphalt.

[0008] Then add a recycling agent and a solvent to the high-viscosity modified asphalt, mix well, and obtain an asphalt mixture;

[0009] Finally, add the oil-rich RAP fines to the asphalt mixture and stir.

[0010] Preferably, the temperature inside the container is maintained at 150-200°C throughout the entire preparation process.

[0011] Preferably, the shearing conditions are: 2000-5000 r / min, 20-40 min;

[0012] The development time is 15-30 minutes.

[0013] Preferably, the method for preparing waste tire rubber powder grafted with GMA in the high-viscosity modifier is as follows:

[0014] First, waste tire rubber powder is soaked in toluene and then filtered. After vacuum drying, it is added to a mixer along with a desulfurization accelerator and mixed to obtain desulfurized rubber powder.

[0015] The desulfurized rubber powder is then dispersed in toluene, ultrasonically treated, filtered, washed, and vacuum dried to obtain activated rubber powder.

[0016] Finally, the activated adhesive powder, GMA (glycidyl acrylate), and initiator (AIBN) are mixed and heated under nitrogen. After the reaction is completed, the mixture is cooled to room temperature, acetone is added to precipitate the unreacted GMA, and the mixture is filtered and then dried under vacuum.

[0017] Preferably, the vacuum drying conditions are: 50-80℃, 10-30h.

[0018] Preferably, the amount of desulfurization accelerator is 1-5 wt% of the mass of waste tire rubber powder;

[0019] The conditions for intensive mixing are: 150-180℃, 30-200rpm, 20-50min.

[0020] Preferably, the amounts of GMA and initiator are 8-15 wt% and 1-1.5 wt% of the mass of the activated adhesive powder, respectively;

[0021] The heating conditions are: 70-90℃, 200-500rpm, 1.5-3h.

[0022] Preferably, the regenerant is at least one of naphthenic oil-based regenerant, bio-oil-based regenerant, and waste engine oil-based regenerant.

[0023] Preferably, the co-solvent is at least one selected from laurylamide diethanol, stearamide diethanol, distearate, and linoleamide.

[0024] The beneficial effects of this invention are as follows:

[0025] GMA molecules contain epoxy groups (polar) and acrylic double bonds (reaction sites). Under the action of free radical initiators, they bind to the -SH bonds on the surface of desulfurized rubber powder through a mercapto-olefin click reaction. As a polar group, the epoxy group of GMA is more likely to form an effective interface with adhesives (resins), oil-rich RAP fines, and components in the base asphalt, thereby strengthening the bonding effect, inhibiting interfacial peeling, and improving water loss resistance.

[0026] Then, the BMI is used to perform a Diels-Alder reaction with the double bonds remaining after grafting GMA with waste tire rubber powder. At the same time, it is conjugated and crosslinked with the aromatic components in the oil-rich RAP fines and the base asphalt. The BMI acts as a "molecular bridge" to connect the rubber powder with the fines and asphalt, forming a crosslinked structure that penetrates the phase boundary. This disperses stress concentration, and the crosslinked interpenetrating structure limits the crack propagation path and improves crack resistance. Detailed Implementation

[0027] In the following examples and comparative examples, the oil-rich RAP fine aggregate came from a mixing plant in Fuzhou, Jiangxi Province. It was RAP (particle size ≤ 3mm, oil-aggregate ratio 8.63%) obtained after separating SMA-13 ​​using the Southern Roadbed Fine Separation Equipment; the base asphalt was 70# base asphalt from Nantong Tongsha Asphalt Technology Co., Ltd.; and the waste tire rubber powder was 40-80 mesh rubber powder from China Rubber Resources Recycling (Suzhou) Co., Ltd.

[0028] In the following examples and comparative examples, the method for preparing waste tire rubber powder grafted with GMA is as follows:

[0029] First, soak 100g of waste tire rubber powder in 200mL of toluene for 2 hours to remove surface oil and impurities. After filtration, vacuum dry at 60℃ for 12 hours. Then, add it together with 3g of desulfurization accelerator (tetramethylthiuram disulfide) into a mixer and mix. Set the temperature to 160℃, the speed to 200rpm, and mix for 30 minutes to obtain desulfurized rubber powder.

[0030] The desulfurized rubber powder was then dispersed in 200 mL of toluene, ultrasonically treated at 50 °C and 40 kHz for 40 min, filtered, washed three times with ethanol, and then vacuum dried at 60 °C for 12 h to obtain activated rubber powder.

[0031] Finally, the activated adhesive powder, 10g GMA (glycidyl acrylate) and 1g initiator (AIBN) were mixed and heated to 80℃ under nitrogen (oil bath, mechanical stirring, speed 300rpm) for 2h. After the reaction was completed, the mixture was cooled to room temperature, acetone was added to precipitate the unreacted GMA, and the mixture was filtered. Then it was vacuum dried at 60℃ for 24h.

[0032] Example 1

[0033] A high-viscosity recycled asphalt mortar based on oil-rich RAP fines, comprising, by weight, 56 parts refined oil-rich RAP fines, 36 parts base asphalt, 7.5 parts high-viscosity modifier, 0.3 parts recycling agent, and 0.2 parts solvent accelerator.

[0034] The high-viscosity modifier comprises the following components in parts by weight: 50 parts of waste tire rubber powder grafted with GMA, 5 parts of BMI (bismaleimide), 25 parts of phenolic resin, 15 parts of isooctanol polyoxyethylene ether, and 5 parts of sulfur.

[0035] The regenerant is a bio-oil-based regenerant.

[0036] The co-solvent is lauramide diethanol.

[0037] Prepare high-viscosity recycled asphalt mortar by following these steps:

[0038] Step 1: Heat the oil-rich RAP fines in an oven at 135℃ for 3 hours to dry them.

[0039] Step 2: Weigh the base asphalt and place it in a container, then heat it to 160℃. Next, dry mix the waste tire rubber powder grafted with GMA and BMI at 80℃, and add it to the container along with phenolic resin, isooctanol polyoxyethylene ether, and sulfur, and stir evenly. Then, at 170℃, use a shearing machine to shear at a rate of 3000r / min for 30 minutes, and then develop at 170℃ for 20 minutes to obtain high-viscosity modified asphalt.

[0040] Step 3: At 170℃, add the recycling agent and the solvent to the high-viscosity modified asphalt in a fluid state and stir for 8 minutes to make the components evenly mixed to obtain the asphalt mixture.

[0041] Step 4: Add oil-rich RAP fines to the asphalt mixture, maintain the temperature of the entire system at 170℃, and stir at 400 rpm for 25 minutes to obtain high-viscosity recycled asphalt mortar.

[0042] Example 2

[0043] A high-viscosity recycled asphalt mortar based on oil-rich RAP fine aggregate, by weight, comprises: 51 parts of finely separated oil-rich RAP fine aggregate, 40 parts of base asphalt, 8.4 parts of high-viscosity modifier, 0.4 parts of recycling agent, and 0.2 parts of solvent accelerator.

[0044] The raw materials for the high viscosity modifier include: 50 parts of waste tire rubber powder grafted with GMA, 3 parts of BMI (bismaleimide), 27 parts of petroleum resin, 16 parts of isooctanol polyoxyethylene ether, and 4 parts of sulfur.

[0045] The regenerator is a naphthenic oil-based regenerator.

[0046] The co-solvent is stearamide diethanol.

[0047] Prepare high-viscosity recycled asphalt mortar by following these steps:

[0048] Step 1: Heat the oil-rich RAP fines in an oven at 145℃ for 3 hours to dry them.

[0049] Step 2: Weigh the base asphalt and place it in a container, then heat it to 163°C. Next, dry mix the waste tire rubber powder grafted with GMA and BMI at 80°C, and add it to the container along with petroleum resin, isooctanol polyoxyethylene ether, and sulfur, and stir evenly. Then, at 165°C, use a shearing machine to shear at a rate of 3000 r / min for 25 min, and then develop it at 170°C for 25 min to obtain high-viscosity modified asphalt.

[0050] Step 3: At 165℃, add the recycling agent and the solvent to the high-viscosity modified asphalt in a fluid state and stir for 10 minutes to make the components evenly mixed to obtain the asphalt mixture.

[0051] Step 4: Add oil-rich RAP fines to the asphalt mixture, maintain the temperature of the entire system at 165℃, and stir at 600 rpm for 18 minutes to obtain high-viscosity recycled asphalt mortar.

[0052] Example 3

[0053] A high-viscosity recycled asphalt mortar based on oil-rich RAP fine aggregate, by weight, comprises: 60 parts of finely separated oil-rich RAP fine aggregate, 30 parts of base asphalt, 9.5 parts of high-viscosity modifier, 0.3 parts of recycling agent, and 0.2 parts of solvent accelerator.

[0054] The raw materials for the high viscosity modifier include: 53 parts of waste tire rubber powder grafted with GMA, 4 parts of BMI (bismaleimide), 26 parts of petroleum resin, 12 parts of isooctanol polyoxyethylene ether, and 5 parts of sulfur.

[0055] The regenerant is a waste engine oil-based regenerant.

[0056] The co-solvent is linoleamide.

[0057] Prepare high-viscosity recycled asphalt mortar by following these steps:

[0058] Step 1: Heat the oil-rich RAP fines in an oven at 130℃ for 3 hours to dry them.

[0059] Step 2: Weigh the base asphalt and place it in a container, then heat it to 160°C. Next, dry mix the waste tire rubber powder grafted with GMA and BMI at 80°C, and add it to the container along with petroleum resin, isooctanol polyoxyethylene ether, and sulfur, and stir evenly. Then, at 180°C, use a shearing machine to shear at a rate of 3000 r / min for 20 min, and then develop it at 170°C for 20 min to obtain high-viscosity modified asphalt.

[0060] Step 3: At 180℃, add the recycling agent and the solvent to the high-viscosity modified asphalt in a fluid state and stir for 6 minutes to make the components evenly mixed to obtain the asphalt mixture.

[0061] Step 4: Add oil-rich RAP fines to the asphalt mixture, maintain the temperature of the entire system at 180℃, and stir at 500 rpm for 20 minutes to obtain high-viscosity recycled asphalt mortar.

[0062] Comparative Example 1

[0063] The process is essentially the same as in Example 1, except that the high-viscosity modifier comprises the following components in parts by weight: 50 parts waste tire rubber powder, 5 parts BMI (bismaleimide), 25 parts phenolic resin, 15 parts isooctanol polyoxyethylene ether, and 5 parts sulfur.

[0064] Specifically, a high-viscosity recycled asphalt mortar based on oil-rich RAP fines comprises, by weight, 56 parts of finely separated oil-rich RAP fines, 36 parts of base asphalt, 7.5 parts of the aforementioned high-viscosity modifier, 0.3 parts of recycling agent, and 0.2 parts of solvent accelerator.

[0065] The regenerant is a bio-oil-based regenerant.

[0066] The co-solvent is lauramide diethanol.

[0067] Prepare high-viscosity recycled asphalt mortar by following these steps:

[0068] Step 1: Heat the oil-rich RAP fines in an oven at 135℃ for 3 hours to dry them.

[0069] Step 2: Weigh the base asphalt and place it in a container, then heat it to 160℃. Next, dry mix the waste tire rubber powder and BMI at 80℃, then add them together with phenolic resin, isooctanol polyoxyethylene ether, and sulfur into the container and stir evenly. Then, at 170℃, use a shearing machine to shear at a rate of 3000r / min for 30 minutes, and then develop at 170℃ for 20 minutes to obtain high-viscosity modified asphalt.

[0070] Step 3: At 170℃, add the recycling agent and the solvent to the high-viscosity modified asphalt in a fluid state and stir for 8 minutes to make the components evenly mixed to obtain the asphalt mixture.

[0071] Step 4: Add oil-rich RAP fines to the asphalt mixture, maintain the temperature of the entire system at 170℃, and stir at 400 rpm for 25 minutes to obtain high-viscosity recycled asphalt mortar.

[0072] Comparative Example 2

[0073] The process is essentially the same as in Example 1, except that the high-viscosity modifier comprises the following components in parts by weight: 50 parts of waste tire rubber powder grafted with GMA, 25 parts of phenolic resin, 15 parts of isooctanol polyoxyethylene ether, and 5 parts of sulfur.

[0074] Specifically, a high-viscosity recycled asphalt mortar based on oil-rich RAP fines comprises, by weight, 56 parts of finely separated oil-rich RAP fines, 36 parts of base asphalt, 7.5 parts of the aforementioned high-viscosity modifier, 0.3 parts of recycling agent, and 0.2 parts of solvent accelerator.

[0075] The regenerant is a bio-oil-based regenerant.

[0076] The co-solvent is lauramide diethanol.

[0077] Prepare high-viscosity recycled asphalt mortar by following these steps:

[0078] Step 1: Heat the oil-rich RAP fines in an oven at 135℃ for 3 hours to dry them.

[0079] Step 2: Weigh the base asphalt and place it in a container, then heat it to 160°C. Add the waste tire rubber powder grafted with GMA, phenolic resin, isooctanol polyoxyethylene ether, and sulfur to the container and stir evenly. Then, at 170°C, use a shearing machine to shear at a rate of 3000 r / min for 30 min, and then develop at 170°C for 20 min to obtain high-viscosity modified asphalt.

[0080] Step 3: At 170℃, add the recycling agent and the solvent to the high-viscosity modified asphalt in a fluid state and stir for 8 minutes to make the components evenly mixed to obtain the asphalt mixture.

[0081] Step 4: Add oil-rich RAP fines to the asphalt mixture, maintain the temperature of the entire system at 170℃, and stir at 400 rpm for 25 minutes to obtain high-viscosity recycled asphalt mortar.

[0082] Comparative Example 3

[0083] The process is basically the same as in Example 1, except that the high-viscosity modifier includes the following components in parts by weight: 50 parts waste tire rubber powder, 25 parts phenolic resin, 15 parts isooctanol polyoxyethylene ether, and 5 parts sulfur.

[0084] Specifically, a high-viscosity recycled asphalt mortar based on oil-rich RAP fines comprises, by weight, 56 parts of finely separated oil-rich RAP fines, 36 parts of base asphalt, 7.5 parts of the aforementioned high-viscosity modifier, 0.3 parts of recycling agent, and 0.2 parts of solvent accelerator.

[0085] The regenerant is a bio-oil-based regenerant.

[0086] The co-solvent is lauramide diethanol.

[0087] Prepare high-viscosity recycled asphalt mortar by following these steps:

[0088] Step 1: Heat the oil-rich RAP fines in an oven at 135℃ for 3 hours to dry them.

[0089] Step 2: Weigh the base asphalt and place it in a container, then heat it to 160°C. Add the waste tire rubber powder, phenolic resin, isooctanol polyoxyethylene ether, and sulfur to the container and stir evenly. Then, at 170°C, use a shearing machine to shear at a rate of 3000 r / min for 30 min, and then develop at 170°C for 20 min to obtain high-viscosity modified asphalt.

[0090] Step 3: At 170℃, add the recycling agent and the solvent to the high-viscosity modified asphalt in a fluid state and stir for 8 minutes to make the components evenly mixed to obtain the asphalt mixture.

[0091] Step 4: Add oil-rich RAP fines to the asphalt mixture, maintain the temperature of the entire system at 170℃, and stir at 400 rpm for 25 minutes to obtain high-viscosity recycled asphalt mortar.

[0092] Recycled asphalt mixtures were prepared by mixing the high-viscosity recycled asphalt mortar obtained in Examples 1, 2, and 3 with aggregates. The aggregates used were all sourced from a mixing plant in Fuzhou, Jiangxi Province, and included 3-5mm finely separated RAP, ≤3mm limestone aggregate, and 3-5mm limestone aggregate. In the recycled asphalt mixtures, the mass percentages of high-viscosity recycled asphalt mortar, 3-5mm finely separated RAP, ≤3mm limestone aggregate, and 3-5mm limestone aggregate were 31.1%, 5.4%, 45.4%, and 18.1%, respectively.

[0093] The preparation steps for recycled asphalt mixture are as follows:

[0094] (1) Preheating: ≤3mm limestone aggregate and 3-5mm limestone aggregate are heated at 190℃ for 4 hours, and 3-5mm fine separation RAP is heated at 130℃ for 2 hours.

[0095] (2) Mixing: Add materials sequentially and mix at a temperature of 175℃ for 90 seconds each time. First, mix ≤3mm limestone aggregate and 3-5mm limestone aggregate for the first time; then, add 3-5mm finely separated RAP and mix for the second time; finally, add the prepared high-viscosity recycled asphalt mortar and mix for the third time to obtain recycled asphalt mixture.

[0096] Then, according to the "Test Procedures for Asphalt and Asphalt Mixtures in Highway Engineering" (JTG E20-2011), recycled asphalt mixtures were prepared into Marshall specimens with a diameter of 101.6 mm and a height of 63.5 mm, and small beam specimens with a height of 35 mm, a length of 250 mm, and a width of 30 mm. The Marshall specimens were used to test their water immersion loss at 60℃ to evaluate the material's anti-stripping performance (three specimens per group, and the average value of the test results was taken). The small beam specimens were used to test the maximum flexural tensile strain at a temperature of -10℃ and a loading rate of 50 mm / min to characterize the low-temperature crack resistance of the recycled asphalt mixture (three specimens per group, and the average value of the test results was taken). The test results are shown in Table 1.

[0097] Table 1 shows the performance results of recycled asphalt mixtures prepared using the mortars obtained in the examples and comparative examples.

[0098] project Water immersion and scattering loss / % Maximum bending tensile strain / με Example 1 4.2 3974 Example 2 3.9 4060 Example 3 3.8 4133 Comparative Example 1 11.6 2845 Comparative Example 2 10.9 2913 Comparative Example 3 12.1 2762

[0099] As shown in Table 1, adding waste tire rubber powder grafted with GMA to recycled asphalt mortar can significantly improve the anti-stripping performance of recycled asphalt mixture (the smaller the water ingress and scattering loss, the better the anti-stripping performance); at the same time, the synergy between BMI and waste tire rubber powder grafted with GMA is more conducive to improving the low-temperature crack resistance of recycled asphalt mixture.

[0100] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A high tack recycled asphalt mortar based on rich oil RAP fines, characterized in that, The components include the following components by mass: 50-70 parts of RAP fine material rich in oil, 20-40 parts of base pitch, 7-15 parts of high-viscosity modifier, 0.1-0.8 parts of regenerant, and 0.1-0.5 parts of solubilizer; The high-viscosity modifier includes the following components by mass: 40-70 parts of waste tire rubber powder grafted with GMA, 2-5 parts of BMI, 15-35 parts of adhesive, 10-20 parts of isooctanol polyoxyethylene ether, and 3-8 parts of sulfur.

2. The method of producing high tack recycled asphalt mortar based on oil-rich RAP fines according to claim 1, characterized in that, The high-viscosity modified pitch is obtained by first placing the base pitch in a container and heating, then adding the waste tire rubber powder grafted with GMA and BMI to the container, stirring uniformly, and then shearing and developing. The regenerant and the solubilizer are then added to the high-viscosity modified pitch, mixed uniformly, and a pitch mixture is obtained. Finally, the RAP fine material rich in oil is added to the pitch mixture and stirred.

3. The method of producing high tack recycled asphalt sand mortar based on rich oil RAP fines according to claim 2, characterized in that, During the entire preparation process, the temperature in the container is maintained at 150-200℃.

4. The method of producing high tack recycled asphalt sand mortar based on rich oil RAP fines according to claim 3, characterized in that, The shearing conditions are: 2000-5000 r / min, 20-40 min. The developing time is 15-30 min.

5. The method of producing high tack recycled asphalt sand mortar based on rich oil RAP fines according to claim 2, characterized in that, In the high-viscosity modifier, the preparation method of the waste tire rubber powder grafted with GMA is as follows: First, the waste tire rubber powder is soaked in toluene, filtered, vacuum dried, and then added to a banbury mixer together with a devulcanization accelerator to obtain devulcanized rubber powder; the devulcanization accelerator is tetramethylthiuram disulfide; Then, the devulcanized rubber powder is dispersed in toluene and ultrasonically treated, filtered, washed, and vacuum dried to obtain activated rubber powder. Finally, the activated rubber powder, GMA, and initiator are mixed, heated under nitrogen, cooled to room temperature after the reaction is complete, precipitated with acetone to remove unreacted GMA, filtered, and vacuum dried.

6. The method of producing high tack recycled asphalt sand mortar based on rich oil RAP fines according to claim 5, characterized in that, The vacuum drying conditions are: 50-80℃, 10-30h.

7. The process for the preparation of high tack recycled asphalt mortar based on rich oil RAP fines as claimed in claim 5 wherein, The amount of devulcanization accelerator is 1-5wt% of the mass of the waste tire rubber powder. The banburying conditions are: 150-180℃, 30-200 rpm, 20-50 min.

8. The method of producing high tack recycled asphalt sand mortar based on rich oil RAP fines according to claim 5, characterized in that, The amounts of GMA and initiator are 8-15 wt% and 1-1.5 wt% of the mass of the activated rubber powder, respectively. The heating conditions are: 70-90℃, 200-500 rpm, 1.5-3h.

9. The process for the preparation of high tack recycled asphalt mortar based on rich oil RAP fines as claimed in claim 2 wherein, The regenerant is at least one of naphthenic oil-based regenerant, bio-oil-based regenerant, and waste engine oil-based regenerant.

10. The method of producing high tack recycled asphalt sand mortar based on rich oil RAP fines as claimed in claim 2, wherein, The solubilizer is at least one of lauryl amide diethanol, stearyl amide diethanol, distearyl amide, and linoleamide.