Warm-mixing recycling agent, preparation process and application thereof

Abstract

The application relates to the field of warm-mixing technology and regeneration technology of asphalt pavement, and discloses a warm-mixing regeneration agent, a preparation process and application thereof, raw material composition of the warm-mixing regeneration agent comprises a rubber plasticizer, a peeling inhibitor, an emulsifier, an antistatic agent, melamine powder and modified cellulose. The preparation process comprises the following steps: the rubber plasticizer is stirred and mixed with the emulsifier to obtain a mixture; the melamine powder and the modified cellulose are stirred and mixed to obtain a modified mixture; the mixture is mixed with the modified mixture, the antistatic agent and the peeling inhibitor are added, and stirring is conducted to obtain the warm-mixing regeneration agent. The application further discloses application of the warm-mixing regeneration agent in preparation of asphalt pavement materials. The warm-mixing regeneration agent prepared by the application can effectively improve the performance of asphalt pavement, improve three indexes of penetration, ductility and softening point, and reduce the mixing temperature of the regeneration mixture.

Description

Technical Field

[0001] This application relates to the fields of warm mix technology and recycling technology for asphalt pavement, and in particular to a warm mix recycling agent, its preparation process, and its application. Background Technology

[0002] With social development, most of my country's highways are now asphalt pavements, requiring regular maintenance. The tens of millions of tons of old asphalt mixtures generated from these pavements would cause a huge waste of resources and environmental pollution if discarded as waste. Therefore, how to reuse old asphalt mixtures has become a research hotspot, and asphalt pavement recycling technology has emerged as a result.

[0003] Asphalt pavement recycling technology is a complete process that involves excavating, recycling, heating, crushing, and screening old asphalt pavement that needs to be repaired or abandoned using specialized pavement recycling equipment. The mixture is then remixed with recycling agents, new asphalt, and new aggregates in a certain proportion to form a compound that meets certain road performance requirements and can be repaved onto the road surface.

[0004] Traditional asphalt pavement recycling technology mainly involves hot recycling of asphalt mixtures. This involves adding an asphalt recycling agent to the old asphalt mixture, heating it to 150℃–180℃, and mixing it with new asphalt and aggregates. This process restores the adhesive properties of the aged asphalt, allowing it to function as a binder again and enabling the recycling of asphalt resources. However, the hot recycling process causes severe secondary aging of the old asphalt mixture, resulting in poor road performance.

[0005] Warm-mix asphalt technology can avoid secondary aging of waste asphalt. It is developed on the basis of hot-mix asphalt technology. That is, without changing the asphalt mixture ratio and construction process, the mixing temperature of the asphalt mixture is reduced by technical means, so as to achieve the same road performance as hot-mix asphalt, reduce the emission of harmful asphalt fumes, and save energy.

[0006] Therefore, combining warm mix technology with recycling technology can not only effectively recycle waste asphalt mixtures, but also solve the energy consumption problem caused by high-temperature mixing and the release of irritating gases during the mixing process by reducing the mixing temperature, thus playing a role in energy conservation and emission reduction and reducing harm to the environment and the health of on-site workers.

[0007] Currently, the integrated application technology of warm mix and recycling of asphalt mixtures has received widespread attention. This technology can effectively restore the cohesiveness of aged asphalt in the old mix. However, due to the high softening point of aged asphalt, it is difficult for the old mix to disperse under mechanical mixing when using warm mix recycling, thus affecting the performance of the mixture and limiting its application. Moreover, most of the mixing process still needs to be completed at a relatively high temperature, causing the asphalt to age secondary during recycling, thereby affecting the durability of asphalt pavements.

[0008] Therefore, there is an urgent need to develop a warm-mix recycling agent that can effectively improve the performance of asphalt pavement and reduce the mixing temperature. Summary of the Invention

[0009] In order to solve at least one of the above-mentioned technical problems, this application provides a warm mix recycler that can effectively improve the performance of asphalt pavement and reduce the mixing temperature of recycled mixtures, as well as its preparation process and application.

[0010] On the one hand, the warm-mix recycling agent provided in this application, by weight, comprises the following raw materials: 50-70 parts of rubber plasticizer, 10-30 parts of anti-stripping agent, 5-15 parts of emulsifier, 5-15 parts of antistatic agent, 5-15 parts of melamine powder, and 5-11 parts of modified cellulose.

[0011] By adopting the above technical solutions, this application incorporates a rubber plasticizer, which improves the softening point of asphalt and replenishes the aromatic phenols in aged asphalt, thereby reducing the mixing temperature of the asphalt mixture. It also enhances the asphalt's anti-aging ability and improves its penetration and ductility. This application incorporates an anti-stripping agent to increase the asphalt's adhesion. This application incorporates an emulsifier and an antistatic agent to increase the asphalt's recyclability. This application also incorporates melamine powder and modified cellulose, which, through specific proportions, exert a synergistic effect to effectively increase the asphalt's adhesion.

[0012] The warm-mix recycling agent prepared by this application using the above-mentioned specific raw materials and proportions can effectively improve the road performance of asphalt, enhance the anti-aging ability of asphalt, increase the adhesion and recyclability of asphalt, and effectively reduce the mixing temperature of asphalt mixture.

[0013] Optionally, the rubber plasticizer is selected from at least one of tributyl acetylcitrate and diisononyl cyclohexane-1,2-dicarboxylate.

[0014] By adopting the above technical solution, the rubber plasticizers selected in this application are tributyl acetylic acid and diisononyl cyclohexane-1,2-dicarboxylate, both of which are non-toxic and environmentally friendly. They can effectively improve the anti-aging properties and adhesion properties of asphalt, as well as improve the softening point of asphalt mixtures and reduce the mixing temperature.

[0015] Optionally, the anti-stripping agent, by weight, comprises the following raw materials: 30-45 parts of terpene resin, 25-35 parts of terpene phenolic resin, 22-35 parts of petroleum resin, and 20-36 parts of styrene-isoprene-styrene block copolymer.

[0016] By adopting the above technical solution, the anti-stripping agent of this application, using the specific raw materials and proportions mentioned above, can improve the spreading degree of asphalt on the surface of aggregates, make the asphalt firmly adhere to the aggregates, reduce the intrusion of water, and enhance the adhesion of asphalt mixtures.

[0017] Optionally, the emulsifier is selected from at least one of C6-C12 alkylphenol polyoxyethylene ether and cetearyl glucoside; the antistatic agent is fatty alcohol polyoxyethylene ether phosphate.

[0018] By adopting the above technical solution, the emulsifier selected in this application is C6-C12 alkylphenol polyoxyethylene ether and cetearyl glucoside, which can make the asphalt mixture tightly integrated and improve its recyclability. The selected antistatic agent is fatty alcohol polyoxyethylene ether phosphate, which can eliminate the static electricity generated by the friction and mixing of various substances during road paving.

[0019] Optionally, the emulsifier is composed of C6-C12 alkylphenol polyoxyethylene ether and cetearyl glucoside, wherein the mass ratio of C6-C12 alkylphenol polyoxyethylene ether to cetearyl glucoside is 1:(0.25-4).

[0020] Preferably, the mass ratio of the C6-C12 alkylphenol polyoxyethylene ether to cetearyl glucoside is 1:(0.43-1.5).

[0021] Preferably, the mass ratio of the C6-C12 alkylphenol polyoxyethylene ether to cetearyl glucoside is 1:1.

[0022] Preferably, the C6-C12 alkylphenol polyoxyethylene ether is selected from at least one of nonylphenol polyoxyethylene ether and octylphenol polyoxyethylene ether.

[0023] By adopting the above technical solution, this application adds C6-C12 alkylphenol polyoxyethylene ether and cetearyl glucoside, which can effectively make the asphalt mixture more compact and improve its stability. The performance improvement of the asphalt mixture is best when the mass ratio of C6-C12 alkylphenol polyoxyethylene ether to cetearyl glucoside is 1:1.

[0024] Optionally, the modified cellulose is selected from at least one of carboxymethyl cellulose, hydroxymethyl cellulose, carboxyethyl cellulose, and hydroxyethyl cellulose.

[0025] By adopting the above technical solution, this application incorporates modified cellulose. Due to the adsorption, stabilization, and multi-directional reinforcing effects of the fiber, the adhesion of the asphalt mixture is enhanced, the bonding force between aggregates is increased, the stability of the asphalt is improved, the toughening effect of the asphalt is enhanced, the aging resistance of the asphalt is increased, and the service life of the asphalt pavement is extended.

[0026] Optionally, the weight ratio of the melamine powder to the modified cellulose is (1-3):1.

[0027] By adopting the above technical solution, this application combines modified cellulose with melamine powder, and the two work synergistically to effectively improve the adhesion performance of asphalt mixtures.

[0028] Secondly, this application provides a preparation process for the warm-stir regenerator, including the following steps:

[0029] The rubber plasticizer and the emulsifier are stirred and mixed to obtain a mixture; the melamine powder and the modified cellulose are stirred and mixed to obtain a modified mixture; the mixture and the modified mixture are mixed, an antistatic agent and an anti-stripping agent are added, and the mixture is stirred to obtain a warm-mix recycling agent.

[0030] By adopting the above technical solution, this application premixes melamine powder and modified cellulose to obtain a modified mixture, which can give full play to the synergistic effect of the two and effectively improve the adhesion of asphalt mixture.

[0031] Optionally, during the preparation of the mixture, the stirring rate is 150–200 r / min and the stirring time is 20–40 min; during the preparation of the modified mixture, the stirring rate is 100–200 r / min and the stirring time is 20–30 min; during the preparation of the warm-mix regenerator, the stirring rate is 150–200 r / min and the stirring time is 20–40 min.

[0032] By adopting the above technical solution, this application significantly improves the road performance of asphalt and reduces the mixing temperature of the mixture by optimizing process parameters.

[0033] Thirdly, this application provides the application of the warm mix recycling agent in the preparation of asphalt pavement materials.

[0034] Optionally, a method for applying a warm-mix recycling agent involves mixing and adding 4-6% of the warm-mix recycling agent, with the remainder being asphalt and aggregate, wherein the asphalt-aggregate ratio is 4.8%-5.6%.

[0035] In summary, the present invention has at least one of the following beneficial technical effects:

[0036] 1. This application uses specific raw materials and proportions, and optimizes process parameters to produce a warm-mix recycling agent that can effectively improve the road performance of asphalt, increase the penetration and ductility of asphalt, and enhance the adhesion and recyclability of asphalt mixtures.

[0037] 2. This application incorporates melamine powder and modified cellulose. The combination of the two has a synergistic effect, effectively improving the adhesion performance of asphalt mixtures, increasing the bonding force between aggregates, toughening the asphalt, and enhancing its durability.

[0038] 3. This application incorporates a rubber plasticizer, which improves the softening point of asphalt, effectively reduces the mixing temperature of asphalt mixtures, saves energy and reduces emissions, and also prevents asphalt mixtures from aging due to excessive heating temperature, thereby extending the service life of asphalt pavements.

[0039] 4. The anti-stripping agent of this application uses specific raw materials and proportions, which can improve the spread of asphalt on the surface of aggregates, make asphalt adhere firmly to aggregates, reduce water intrusion, and enhance the adhesion of asphalt mixtures. Detailed Implementation

[0040] The present application will be further described in detail below with reference to the embodiments.

[0041] This application designs a warm-mix recycling agent, which, by weight, comprises: 50-70 parts of rubber plasticizer, 10-30 parts of anti-stripping agent, 5-15 parts of emulsifier, 5-15 parts of antistatic agent, 5-15 parts of melamine powder, and 5-11 parts of modified cellulose.

[0042] The warm-stir regenerator preparation process used in this application includes the following steps:

[0043] The rubber plasticizer and the emulsifier are stirred and mixed to obtain a mixture; the melamine powder and the modified cellulose are stirred and mixed to obtain a modified mixture; the mixture and the modified mixture are mixed, an antistatic agent and an anti-stripping agent are added, and the mixture is stirred to obtain a warm-mix recycling agent.

[0044] The warm-mix recycling agent of this application can be used in the preparation of asphalt pavement materials.

[0045] A construction method for a warm-mix recycling agent involves mixing and adding 4-6% warm-mix recycling agent, with the remainder being asphalt and aggregate, wherein the asphalt-aggregate ratio is 4.8%-5.6%.

[0046] The warm mix recycling agent proposed in this application contains rubber plasticizer, anti-stripping agent, emulsifier, antistatic agent, melamine powder and modified cellulose, which can effectively improve the road performance of asphalt mixture, enhance the anti-aging ability of asphalt mixture, thereby effectively extending the service life of asphalt pavement and enhancing the adhesion and recyclability of asphalt mixture.

[0047] The warm-mix regenerator preparation process used in this application is simple to operate and optimizes process parameters, thereby effectively improving the road performance of the warm-mix regenerator.

[0048] All raw materials used in this application are commercially available products, and the specific manufacturers are listed in Table 1.

[0049] Table 1

[0050]

[0051] Specific Implementation

[0053] Examples 1-4

[0054] Example 1

[0055] This embodiment provides a warm-mix regenerator, the raw material composition of which includes: 60 kg of tributyl acetylacetic acid, 20 kg of anti-stripping agent, 10 kg of nonylphenol polyoxyethylene ether, 10 kg of fatty alcohol polyoxyethylene ether phosphate, 12 kg of melamine powder, and 10 kg of carboxymethyl cellulose.

[0056] The preparation process includes the following steps:

[0057] Acetyl tributyl citrate and nonylphenol polyoxyethylene ether were mixed and stirred at a stirring rate of 180 r / min for 30 min to obtain a mixture; melamine powder and carboxymethyl cellulose were mixed and stirred at a stirring rate of 150 r / min for 25 min to obtain a modified mixture; the mixture and the modified mixture were mixed, fatty alcohol polyoxyethylene ether phosphate and anti-stripping agent were added, and stirred at a stirring rate of 180 r / min for 30 min to obtain a warm-mix regenerator.

[0058] The raw material composition of the anti-stripping agent is 40 kg of terpene resin; 30 kg of terpene phenolic resin; 25 kg of petroleum resin; and 30 kg of styrene-isoprene-styrene block copolymer.

[0059] Application of warm mix recycling agent in the preparation of asphalt pavement materials: 5% of the warm mix recycling agent is added during on-site mixing, with the remainder being asphalt and aggregate. The asphalt-aggregate ratio is 5.1%, and the mixture is mixed to obtain a warm mix recycled asphalt mixture.

[0060] Example 2

[0061] This embodiment provides a warm-mix regenerator, the raw material composition of which includes: 50 kg of diisononyl cyclohexane-1,2-dicarboxylate, 15 kg of anti-stripping agent, 15 kg of octylphenol polyoxyethylene ether, 8 kg of fatty alcohol polyoxyethylene ether phosphate, 15 kg of melamine powder, and 5 kg of hydroxymethyl cellulose.

[0062] The preparation process includes the following steps:

[0063] Cyclohexane-1,2-dicarboxylic acid diisononyl ester and octylphenol polyoxyethylene ether were mixed and stirred at a stirring rate of 150 r / min for 40 min to obtain a mixture; melamine powder and hydroxymethyl cellulose were mixed and stirred at a stirring rate of 100 r / min for 30 min to obtain a modified mixture; the mixture and the modified mixture were mixed, fatty alcohol polyoxyethylene ether phosphate and anti-stripping agent were added, and the mixture was stirred at a stirring rate of 200 r / min for 20 min to obtain a warm-mix regenerator.

[0064] The anti-stripping agent consists of the following raw materials: 30 kg of terpene resin; 35 kg of terpene phenolic resin; 22 kg of C5 petroleum resin; 20 kg of styrene-isoprene-styrene block copolymer; 40 kg of rosin; 30 kg of hydrophobic dispersible latex powder additive (organosilicon-vinyl acetate-vinyl tert-carbonate copolymer emulsion, where the organosilicon is vinyltriethoxysilane and the mass ratio of organosilicon, vinyl acetate and tert-carbonate is 4:81:15); 10 kg of UV shielding agent (SI-101 organosilicon glass resin); 10 kg of dispersant (stearamide); 28 kg of dodecyl dimethyl tert-amine; and 80 kg of methyl ethyl ketone.

[0065] Application of warm mix recycling agent in the preparation of asphalt pavement materials: 4% of the warm mix recycling agent is added during on-site mixing, with the remainder being asphalt and aggregate. The asphalt-aggregate ratio is 5.5%, and the mixture is mixed to obtain a warm mix recycled asphalt mixture.

[0066] Example 3

[0067] This embodiment provides a warm-mix regenerator, the raw material composition of which includes: 70 kg of tributyl acetylic acid, 10 kg of anti-stripping agent, 5 kg of dodecylphenol polyoxyethylene ether, 5 kg of fatty alcohol polyoxyethylene ether phosphate, 10 kg of melamine powder, and 7 kg of carboxyethyl cellulose.

[0068] The preparation process includes the following steps:

[0069] Acetyl tributyl citrate and dodecylphenol polyoxyethylene ether were mixed and stirred at a stirring rate of 200 r / min for 35 min to obtain a mixture; melamine powder and carboxyethyl cellulose were mixed and stirred at a stirring rate of 180 r / min for 20 min to obtain a modified mixture; the mixture and the modified mixture were mixed, fatty alcohol polyoxyethylene ether phosphate and anti-stripping agent were added, and stirred at a stirring rate of 190 r / min for 35 min to obtain a warm-mix regenerator.

[0070] The anti-stripping agent consists of the following raw materials: 45 kg of terpene resin; 25 kg of terpene phenolic resin; 28 kg of C5 petroleum resin; 36 kg of styrene-isoprene-styrene block copolymer; 46 kg of rosin; 20 kg of hydrophobic dispersible latex powder additive (organosilicon-vinyl acetate-vinyl tert-carbonate copolymer emulsion, where the organosilicon is vinyltriethoxysilane and the mass ratio of organosilicon, vinyl acetate and tert-carbonate is 4:81:15); 19 kg of UV shielding agent (SI-101 organosilicon glass resin); 15 kg of dispersant (stearamide); 37 kg of dodecyl dimethyl tert-amine; and 78 kg of methyl ethyl ketone.

[0071] Application of warm mix recycling agent in the field of warm mix technology and recycling technology for asphalt pavement: 6% of the warm mix recycling agent is added during on-site mixing, with the remainder being asphalt and aggregate. The asphalt-aggregate ratio is 5.58%, and the mixture is mixed to obtain a warm mix recycled asphalt mixture.

[0072] Example 4

[0073] This embodiment provides a warm-mix regenerator, the raw material composition of which includes: 35 kg of tributyl acetylacetonate, 30 kg of diisononyl cyclohexane-1,2-dicarboxylate, 30 kg of anti-stripping agent, 12 kg of cetearyl glucoside, 15 kg of fatty alcohol polyoxyethylene ether phosphate, 5 kg of melamine powder, and 11 kg of hydroxyethyl cellulose.

[0074] The preparation process includes the following steps:

[0075] Acetyl tributyl citrate, diisononyl cyclohexane-1,2-dicarboxylate, and cetearyl glucoside were mixed and stirred at 165 r / min for 20 min to obtain a mixture. Melamine powder and hydroxyethyl cellulose were mixed and stirred at 200 r / min for 23 min to obtain a modified mixture. The mixture and the modified mixture were combined, and fatty alcohol polyoxyethylene ether phosphate and an anti-stripping agent were added. The mixture was stirred at 150 r / min for 40 min to obtain a warm-mix regenerator.

[0076] The anti-stripping agent consists of the following raw materials: 39 kg of terpene resin; 31 kg of terpene phenolic resin; 27 kg of C5 petroleum resin; 23 kg of styrene-isoprene-styrene block copolymer; 37 kg of rosin; 22 kg of hydrophobic dispersible latex powder additive (organosilicon-vinyl acetate-vinyl tert-carbonate copolymer emulsion, where the organosilicon is vinyltriethoxysilane and the mass ratio of organosilicon, vinyl acetate and tert-carbonate is 4:81:15); 15 parts of UV shielding agent (SI-101 organosilicon glass resin); 7 kg of dispersant (polyethylene wax); 26 kg of dodecyl dimethyl tert-amine; and 78 kg of methyl ethyl ketone.

[0077] Application of warm mix recycling agent in the field of warm mix technology and recycling technology for asphalt pavement: 5% of the warm mix recycling agent is added during on-site mixing, with the remainder being asphalt and aggregate. The asphalt-aggregate ratio is 4.8%, and the mixture is mixed to obtain a warm mix recycled asphalt mixture.

[0078] The content of each component in Examples 1 to 4 is shown in Table 2 below.

[0079] Table 2

[0080]

[0081]

[0082] The parameters in Examples 1 to 4 are shown in Table 3 below.

[0083] Table 3

[0084]

[0085] Comparative Examples 1-5

[0086] Comparative Example 1

[0087] The difference between Comparative Example 1 and Example 1 is that no melamine powder was added to Comparative Example 1.

[0088] Comparative Example 2

[0089] The difference between Comparative Example 2 and Example 1 is that Comparative Example 2 did not contain carboxymethyl cellulose.

[0090] Comparative Example 3

[0091] The difference between Comparative Example 3 and Example 1 is that in Comparative Example 3, melamine powder was replaced with an equal mass of carboxymethyl cellulose.

[0092] Comparative Example 4

[0093] The difference between Comparative Example 4 and Example 1 is that in Comparative Example 4, carboxymethyl cellulose was replaced with an equal mass of melamine powder.

[0094] Comparative Example 5

[0095] The difference between Comparative Example 5 and Example 1 is that Comparative Example 5 did not contain melamine powder and carboxymethyl cellulose.

[0096] Experimental testing

[0097] Testing items and testing methods

[0098] The penetration of asphalt materials was tested according to GB / T 4509-2010 "Test Method for Penetration of Asphalt".

[0099] The ductility of asphalt materials was tested according to GB / T 4508-2010 "Test Method for Ductility of Asphalt".

[0100] The softening point of asphalt materials was tested according to GB / T 4507-2014 "Determination of Softening Point of Asphalt - Ring and Ball Method".

[0101] Adhesion tests were conducted on asphalt materials according to JTG E20-2011 "Test Procedures for Asphalt and Asphalt Mixtures in Highway Engineering".

[0102] Penetration: The depth to which a standard needle penetrates vertically into an asphalt sample under specified conditions, expressed in 1 / 10 mm.

[0103] Ductility: The length, measured in cm, of an asphalt specimen of a specified shape when stretched at a specified temperature and a certain speed until it breaks.

[0104] Softening point: The temperature at which asphalt reaches a certain viscosity under specific experimental conditions.

[0105] The warm mix recycling agents prepared in Examples 1-4 and Comparative Examples 1-5 were mixed with asphalt mixtures and then tested for penetration, ductility, softening point, and adhesion grade. Old asphalt mixtures without warm mix recycling agents were used as controls. The test results are shown in Table 4.

[0106] Table 4

[0107]

[0108]

[0109] As can be seen from the test results in Table 4, the asphalt mixtures mixed with the warm-mix recycling agents prepared in Examples 1 to 4 have excellent road performance compared with the old asphalt mixtures. The penetration and ductility have been greatly improved, the softening point has also been improved, and the adhesion of the asphalt mixture has been enhanced.

[0110] Compared to Example 1, Comparative Examples 1 and 2 used less melamine powder and modified cellulose in their raw materials, respectively. The resulting warm-mix regenerators were inferior to those of Example 1 in terms of enhancing asphalt penetration, ductility, and softening point.

[0111] Comparative Example 3 replaced melamine powder with an equal mass of carboxymethyl cellulose, and Comparative Example 4 replaced carboxymethyl cellulose with an equal mass of melamine powder. The resulting warm-mix regenerators did not show the same significant improvement effect on penetration, ductility, and softening point as the warm-mix regenerators prepared in Example 1.

[0112] Comparative Example 5, which did not contain melamine powder and modified cellulose, produced a warm mix regenerator that was far less effective than the warm mix regenerator prepared in Example 1 in improving asphalt pavement performance and softening point.

[0113] Based on the test results of Comparative Examples 1 to 5, it can be seen that the combination of melamine powder and modified cellulose has a synergistic effect, which enables the prepared warm mix regeneration agent to significantly improve the performance of asphalt pavement and improve the three major indicators of penetration, ductility and softening point.

[0114] Examples 5-8

[0115] Example 5

[0116] The difference between Example 5 and Example 1 is that in Example 5, the melamine powder is 15 kg, the modified cellulose is 7 kg, and the mass ratio of melamine powder to modified cellulose is 2.14:1.

[0117] Example 6

[0118] The difference between Example 6 and Example 1 is that in Example 6, the melamine powder is 14 kg, the modified cellulose is 8 kg, and the mass ratio of melamine powder to modified cellulose is 1.75:1.

[0119] Example 7

[0120] The difference between Example 7 and Example 1 is that in Example 7, the melamine powder is 13 kg, the modified cellulose is 9 kg, and the mass ratio of melamine powder to modified cellulose is 1.44:1.

[0121] Example 8

[0122] The difference between Example 8 and Example 1 is that in Example 8, the melamine powder is 11 kg, the modified cellulose is 11 kg, and the mass ratio of melamine powder to modified cellulose is 1:1.

[0123] The warm mix recycling agents prepared in Examples 5-8 and Example 1 were mixed with asphalt mixtures and then tested for penetration, ductility, softening point, and adhesion grade. The test results are shown in Table 5.

[0124] Table 5

[0125]

[0126] As can be seen from the test results in Table 5, in Example 1, when the mass ratio of melamine powder to modified cellulose is 1.2:1, the warm mix regeneration agent prepared has the most significant improvement on the performance of asphalt, the best road performance of asphalt, and the highest penetration and ductility.

[0127] Examples 9-15

[0128] Example 9

[0129] The difference between Example 9 and Example 1 is that the emulsifier in Example 9 is 10 kg of cetearyl glucoside.

[0130] Example 10

[0131] The difference between Example 10 and Example 1 is that the emulsifier in Example 10 is 5 kg of nonylphenol polyoxyethylene ether and 5 kg of cetearyl glucoside, and the mass ratio of nonylphenol polyoxyethylene ether to cetearyl glucoside is 1:1.

[0132] Example 11

[0133] The difference between Example 11 and Example 1 is that the emulsifier in Example 11 is 5 kg of octylphenol polyoxyethylene ether and 5 kg of cetearyl glucoside.

[0134] Example 12

[0135] The difference between Example 12 and Example 1 is that the emulsifier in Example 12 is 2 kg of nonylphenol polyoxyethylene ether and 8 kg of cetearyl glucoside, and the mass ratio of nonylphenol polyoxyethylene ether to cetearyl glucoside is 1:4.

[0136] Example 13

[0137] The difference between Example 13 and Example 1 is that the emulsifier in Example 13 is 4 kg of nonylphenol polyoxyethylene ether and 6 kg of cetearyl glucoside, and the mass ratio of nonylphenol polyoxyethylene ether to cetearyl glucoside is 1:1.5.

[0138] Example 14

[0139] The difference between Example 14 and Example 1 is that the emulsifier in Example 14 is 7 kg of nonylphenol polyoxyethylene ether and 3 kg of cetearyl glucoside, and the mass ratio of nonylphenol polyoxyethylene ether to cetearyl glucoside is 1:0.43.

[0140] Example 15

[0141] The difference between Example 15 and Example 1 is that the emulsifier in Example 15 is 8 kg of nonylphenol polyoxyethylene ether and 2 kg of cetearyl glucoside, and the mass ratio of nonylphenol polyoxyethylene ether to cetearyl glucoside is 1:0.25.

[0142] The warm mix recycling agents prepared in Examples 1 and 9-15 were mixed with asphalt mixtures and then tested for penetration, ductility, softening point, and adhesion grade. The test results are shown in Table 6.

[0143] Table 6

[0144]

[0145] As can be seen from the test results in Table 6, Examples 1 and 9 are single emulsifiers, while Examples 10 to 15 are composite emulsifiers. The warm mix regeneration agents prepared in Examples 1 and 9 improve the performance of asphalt by less than those in Examples 10 to 15, indicating that composite emulsifiers are better at improving the performance of asphalt.

[0146] The difference between Example 10 and Example 11 is that Example 10 uses nonylphenol polyoxyethylene ether and cetearyl glucoside, while Example 11 uses octylphenol polyoxyethylene ether and cetearyl glucoside. The warm mix regenerators prepared in both Examples 10 and 11 can significantly improve the properties of asphalt, and the effects are not significantly different. This indicates that the combined use of alkylphenol polyoxyethylene ether emulsifiers and cetearyl glucoside can better improve the penetration and ductility of asphalt.

[0147] As can be seen from Examples 10 to 15, in Example 10, when the mass ratio of nonylphenol polyoxyethylene ether to cetearyl glucoside is 1:1, the asphalt road performance is the best, with the highest penetration and ductility.

[0148] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A warm-mix regenerator, characterized in that, By weight, its raw material composition includes: 50-70 parts rubber plasticizer, 10-30 parts anti-stripping agent, 5-15 parts emulsifier, 5-15 parts antistatic agent, 5-15 parts melamine powder, and 5-11 parts modified cellulose. The rubber plasticizer is selected from at least one of acetylglucosinolate tributyl citrate and diisononyl cyclohexane-1,2-dicarboxylate. The anti-stripping agent, by weight, comprises the following raw materials: 30-45 parts of terpene resin, 25-35 parts of terpene phenolic resin, 22-35 parts of petroleum resin, and 20-36 parts of styrene-isoprene-styrene block copolymer. The emulsifier is selected from at least one of C6-C12 alkylphenol polyoxyethylene ether and cetearyl glucoside; the antistatic agent is fatty alcohol polyoxyethylene ether phosphate. The modified cellulose is selected from at least one of carboxymethyl cellulose, hydroxymethyl cellulose, carboxyethyl cellulose, and hydroxyethyl cellulose.

2. The warm-stir regenerator according to claim 1, characterized in that, The emulsifier is composed of C6-C12 alkylphenol polyoxyethylene ether and cetearyl glucoside, wherein the mass ratio of C6-C12 alkylphenol polyoxyethylene ether to cetearyl glucoside is 1:(0.25~4).

3. The warm-stir regenerator according to claim 1, characterized in that, The mass ratio of melamine powder to modified cellulose is (1~3):

1.

4. A preparation process for the warm-stirring regenerator according to claim 1, characterized in that, Includes the following steps: The rubber plasticizer and the emulsifier are stirred and mixed to obtain a mixture; the melamine powder and the modified cellulose are stirred and mixed to obtain a modified mixture; the mixture and the modified mixture are mixed, an antistatic agent and an anti-stripping agent are added, and the mixture is stirred to obtain a warm-mix recycling agent.

5. The preparation process of the warm-stirring regenerator according to claim 4, characterized in that, During the preparation of the mixture, the stirring rate is 150~200 r / min and the stirring time is 20~40 min; During the preparation of the modified mixture, the stirring rate is 100~200 r / min and the stirring time is 20~30 min; During the preparation of the warm-stirring regenerator, the stirring rate is 150~200 r / min and the stirring time is 20~40 min.

6. The application of the warm-mix recycling agent according to any one of claims 1 to 3 in the preparation of asphalt pavement materials.

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