Asphalt recycled material viscosity reducer, preparation method of asphalt recycled material viscosity reducer and application method of asphalt recycled material viscosity reducer in asphalt concrete recycled material

Abstract

The invention discloses an asphalt recycled material viscosity reducer, a preparation method of the asphalt recycled material viscosity reducer and an application method of the asphalt recycled material viscosity reducer in an asphalt concrete recycled material. The invention discloses a viscosity reducer for asphalt reclaimed materials. The viscosity reducer comprises the following components in percentage by weight: 10%-40% of a surface active dispersant, 20%-40% of a penetrant, 1%-5% of a plasticizer, 0%-5% of an emulsifier and the balance of a diluent. In addition, the invention also discloses a preparation method of the asphalt reclaimed material viscosity reducer. In addition, the invention also discloses an application method of the asphalt reclaimed material viscosity reducer in asphalt concrete reclaimed materials. By adding the asphalt recycled material viscosity reducer, the viscosity of aged asphalt in the asphalt concrete recycled material can be reduced, and the regeneration of the asphalt concrete recycled material is further achieved.

Description

Technical Field

[0001] The present invention relates to a viscosity reducer, in particular to an asphalt recycled material viscosity reducer, a preparation method of the asphalt recycled material viscosity reducer and an application method thereof in asphalt concrete recycled material. Background Art

[0002] According to statistics from the Ministry of Transportation, more than 90% of roads are currently pavemented with asphalt concrete. These asphalt concrete pavements will be damaged by vehicle rolling and asphalt aging, and need to be repaired and renovated every once in a while, resulting in a large amount of asphalt concrete scraping material. If the scraping material is directly discarded, it will not only cause environmental pollution, but also be a huge waste of resources. The best way to deal with it is to recycle the asphalt concrete scraping material, add new sand, stone and asphalt, and make recycled asphalt concrete, which not only effectively solves the problem of environmental pollution caused by waste dumping, but also has good resource utilization and economic benefits.

[0003] In view of this, in order to widely use recycled asphalt concrete, it is first necessary to solve the aging problem of asphalt in road use environment. Summary of the invention

[0004] The invention provides a viscosity reducer for recycled asphalt, which comprises 10% to 40% by weight of a surfactant dispersant, 20% to 40% by weight of a penetrant, 1% to 5% by weight of a plasticizer, 0% to 5% by weight of an emulsifier, and the remainder is a diluent.

[0005] In some embodiments, the surface active dispersant is lignin sulfonate, humic acid sulfonate, polyoxyindene resin sulfonate, aromatic sulfonate-formaldehyde condensate, aliphatic hydroxy sulfonate-formaldehyde condensate, phenyl polyoxyethylene ether-formaldehyde condensate, polycarboxylic acid compound or a combination thereof.

[0006] In some embodiments, the penetrant is alkyl polyoxyethylene ether, alkylphenol polyoxyethylene ether, aromatic hydrocarbon polyoxyethylene ether, styrene aromatic hydrocarbon polyoxyethylene ether, polyol polyoxyethylene ether, alkylamine polyoxyethylene ether, alkyl polyoxyethylene polyoxypropylene ether, alkylphenol polyoxyethylene polyoxypropylene ether, aromatic hydrocarbon polyoxyethylene polyoxypropylene ether, styrene aromatic hydrocarbon polyoxyethylene polyoxypropylene ether, polyol polyoxyethylene polyoxypropylene ether, alkylamine polyoxyethylene polyoxypropylene ether, alkyl phosphate, alkyl polyoxyethylene ether alcohol phosphate, alkylphenol polyoxyethylene ether alcohol phosphate, ethoxylated fatty alcohol, fatty alcohol polyoxyethylene ether, fatty alcohol polyether amide, polyurethane, polyurethane-acrylic copolymer or a combination thereof.

[0007] In some embodiments, the plasticizer is sodium carboxymethyl starch, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, triethyl citrate, acetyl triethyl citrate, tributyl citrate, acetyl tributyl citrate, acetyl trihexyl citrate, acetylated monoglyceride, dibutyl maleate, tributyl phosphate, phthalates, terephthalates, or a combination thereof.

[0008] In some embodiments, the emulsifier is a carboxylate emulsifier, a sulfonate emulsifier, an ammonium salt emulsifier, an alkylphenol polyoxyethylene ether emulsifier, a benzylphenol polyoxyethylene ether, a phenethylphenol polyoxyethylene ether, a fatty alcohol polyoxyethylene ether, or a combination thereof.

[0009] The invention provides a method for preparing a viscosity reducer for asphalt recycled materials, comprising the following steps. 10% to 40% by weight of a surfactant dispersant, 20% to 40% by weight of a penetrant, 1% to 5% by weight of a plasticizer, 0% to 5% by weight of an emulsifier, and the remainder as a diluent are weighed respectively. The surfactant dispersant and the penetrant are placed in a stirring tank. The temperature in the stirring tank is raised to 40° C. to 70° C., and stirred at a speed of 300 rpm to 500 rpm for 10 to 15 minutes. The same temperature is maintained, a diluent is added, and stirred at a speed of 300 rpm to 500 rpm for 10 to 15 minutes. The diluent is mixed evenly with the surfactant dispersant and the penetrant. Then a plasticizer and / or an emulsifier are added, and stirring is continued at a speed of 300 rpm to 500 rpm for 15 to 30 minutes. After stirring and mixing evenly, the mixture is cooled to room temperature.

[0010] In some embodiments, the emulsifier is added at the same time as the plasticizer.

[0011] The present invention provides an application method of an asphalt recycled material viscosity reducer in asphalt concrete recycled material, comprising the following steps. Asphalt concrete recycled material is provided, and the asphalt concrete recycled material includes aged asphalt. New asphalt is added. After the asphalt concrete recycled material and the new asphalt are fully mixed, the asphalt recycled material viscosity reducer is added to obtain asphalt concrete recycled material. In addition, the asphalt recycled material viscosity reducer includes a surfactant dispersant, and the surfactant dispersant includes a hydrophilic end and a lipophilic end. After the lipophilic end is adsorbed on the surface of the aged asphalt, the clumped aged asphalt is dispersed through the charge repulsion of the like charges between the hydrophilic ends, thereby reducing the asphalt viscosity of the asphalt concrete recycled material.

[0012] The present invention provides an application method of an asphalt recycled material viscosity reducer in asphalt concrete recycled material, comprising the following steps. Asphalt concrete recycled material and new concrete material are mixed to form a first recycled material mixture, and the asphalt concrete recycled material includes aged asphalt. The first recycled material mixture and new asphalt are mixed to form a second recycled material mixture. The asphalt recycled material viscosity reducer is added to the second recycled material mixture to obtain asphalt concrete recycled material. In addition, the asphalt recycled material viscosity reducer includes a surfactant dispersant, and the surfactant dispersant includes a hydrophilic end and a lipophilic end. After the lipophilic end is adsorbed on the surface of the aged asphalt, the clumped aged asphalt is dispersed through the charge repulsion of the like charges between the hydrophilic ends, thereby reducing the asphalt viscosity of the asphalt concrete recycled material. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to make the purpose, features, advantages and embodiments of the present invention more clearly understood, the detailed description of the accompanying drawings is as follows:

[0014] Figure 1 It is a schematic diagram of the causes and mechanisms of asphalt aging;

[0015] Figure 2 is a flow chart of a method for preparing a viscosity reducer for recycled asphalt according to some embodiments of the present invention;

[0016] Figure 3 is a flow chart of a method for applying a viscosity reducer for recycled asphalt material to recycled asphalt concrete material according to some embodiments of the present invention; and

[0017] Figure 4 It is a schematic diagram of the principle process of dispersing aged asphalt in asphalt concrete recycled material through asphalt recycled material viscosity reducer according to some embodiments of the present invention. DETAILED DESCRIPTION

[0018] The following will clearly illustrate the spirit of the present invention with drawings and detailed descriptions. Any person having ordinary knowledge in the technical field can change and modify the technology disclosed by the present invention after understanding the preferred embodiments of the present invention, without departing from the spirit and scope of the present invention.

[0019] The words "include", "including", "have", "contain" and the like used in this document are open-ended terms, meaning including but not limited to.

[0020] See also Figure 1 , Figure 1 This is a schematic diagram of the causes and mechanisms of asphalt aging. Figure 1As shown in the asphalt 100A in FIG. 1 , the components of asphalt mainly include aromatic hydrocarbons 110A (including aromatic hydrocarbons and polar aromatic hydrocarbons), saturated hydrocarbons 120A and asphaltene s 130A. The so-called asphalt aging refers to the process in which asphalt is exposed to the air for a long time, and undergoes oxidation, volatilization, polymerization and / or agglomeration under the action of oxygen, high heat, sunlight and water, causing the structure of asphalt 100A to change, thereby causing the performance of asphalt concrete pavement to deteriorate.

[0021] like Figure 1 As shown in the aged asphalt 100B, during the aging process of asphalt, the aromatic hydrocarbon 110B component in the original asphalt 100A will decrease, while the asphalt essence 130B component will increase, that is, it will become agglomerated aged asphalt 130B. At this time, the softening point and viscosity of the aged asphalt 100B will also increase, which will cause the aged asphalt 100B to become hard, brittle, lose elasticity and reduce adhesion, which will seriously affect the performance of the asphalt concrete pavement, reduce the durability of the pavement, and shorten the service life.

[0022] Accordingly, in order to overcome the problem of asphalt aging, an embodiment of the present invention provides an asphalt recycled material viscosity reducer. The asphalt recycled material viscosity reducer includes 10% to 40% by weight of a surfactant dispersant, 20% to 40% by weight of a penetrant, 1% to 5% by weight of a plasticizer, and 0% to 5% by weight of an emulsifier, and the remainder is a diluent, and the weight percentage of the diluent is 10% to 69%.

[0023] In some embodiments, the surface active dispersant is lignin sulfonate, humic acid sulfonate, polyoxyindene resin sulfonate, aromatic sulfonate-formaldehyde condensate, aliphatic hydroxy sulfonate-formaldehyde condensate, phenyl polyoxyethylene ether-formaldehyde condensate, polycarboxylic acid compound or a combination thereof. In some embodiments, preferably, aromatic sulfonate-formaldehyde condensate includes naphthalene sulfonate-formaldehyde condensate, onion sulfonate-formaldehyde condensate, aminoaromatic sulfonate-phenol-formaldehyde condensate, melamine sulfonate-formaldehyde condensate or a combination thereof. In some embodiments, preferably, the polycarboxylic acid compound includes polyacrylate, methacrylic acid-methoxypolyoxyethylene acrylate copolymer, maleic anhydride-allyl polyoxyethylene ether copolymer, acrylic acid-ethylene glycol monovinyl polyoxyethylene ether copolymer, acrylic acid-methallyl polyoxyethylene ether copolymer, acrylic acid-isopentenyl polyoxyethylene ether copolymer, acrylic acid-4-hydroxybutyl vinyl polyoxyethylene ether copolymer, styrene-acrylic acid copolymer, styrene-maleate copolymer, styrene-acrylic acid-itaconic acid copolymer, styrene-acrylic acid-methoxypolyoxyethylene acrylate copolymer, styrene-maleic acid-methoxypolyoxyethylene acrylate copolymer, styrene-acrylic acid-methoxypolyoxyethylene polyoxypropylene acrylate copolymer, styrene-maleic acid-methoxypolyoxyethylene polyoxypropylene acrylate copolymer, polyamide-polyimide copolymer or a combination thereof.

[0024] It is worth mentioning that the surfactant dispersant includes a lipophilic end and a hydrophilic end, wherein the hydrophilic end of the surfactant dispersant may be positively or negatively charged. Figure 1 The aged asphalt 130B) is then dispersed through the repulsion mechanism of like charges (i.e., positive or negative charges) at the hydrophilic end. The detailed mechanism is described later.

[0025] In some embodiments, the penetrant is an alkyl polyoxyethylene ether, an alkylphenol polyoxyethylene ether, an aromatic hydrocarbon polyoxyethylene ether, a styrene aromatic hydrocarbon polyoxyethylene ether, a polyol polyoxyethylene ether, an alkylamine polyoxyethylene ether, an alkyl polyoxyethylene polyoxypropylene ether, an alkylphenol polyoxyethylene polyoxypropylene ether, an aromatic hydrocarbon polyoxyethylene polyoxypropylene ether, a styrene aromatic hydrocarbon polyoxyethylene polyoxypropylene ether, a polyol polyoxyethylene polyoxypropylene ether, an alkylamine polyoxyethylene polyoxypropylene ether, an alkyl phosphate ester, an alkyl polyoxyethylene ether alcohol phosphate ester, an alkylphenol polyoxyethylene ether alcohol phosphate ester, an ethoxylated fatty alcohol, a fatty alcohol polyoxyethylene ether, a fatty alcohol polyether amide, a polyurethane, a polyurethane-acrylic copolymer, or a combination thereof. In addition, the penetrant allows the surfactant to penetrate into the agglomerated aged asphalt.

[0026] In some embodiments, the plasticizer is sodium carboxymethyl starch, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, triethyl citrate, acetyl triethyl citrate, tributyl citrate, acetyl tributyl citrate, acetyl trihexyl citrate, acetylated monoglyceride, dibutyl maleate, tributyl phosphate, phthalates, terephthalates, or a combination thereof.

[0027] In some embodiments, the emulsifier is a carboxylate emulsifier, a sulfonate emulsifier, an ammonium salt emulsifier, an alkylphenol polyoxyethylene ether emulsifier, a benzylphenol polyoxyethylene ether, a phenethylphenol polyoxyethylene ether, a fatty alcohol polyoxyethylene ether or a combination thereof. The function of the emulsifier is to combine water molecules with oil molecules so that the water molecules and the oil molecules can be uniformly mixed. Therefore, the emulsifier is used when the water solubility of the surfactant dispersant, the penetrant and / or the plasticizer is poor.

[0028] In some embodiments, the diluent is water. The diluent can be used as a solvent for the surfactant dispersant, penetrant, plasticizer and / or emulsifier to make the surfactant dispersant, penetrant, plasticizer and / or emulsifier more evenly mixed. In addition, the diluent can make the surfactant dispersant, penetrant, plasticizer and / or emulsifier mixture have a lower viscosity, which is more convenient for adding the asphalt recycled material viscosity reducer to the asphalt concrete recycled material.

[0029] In order to overcome the problem of asphalt aging, in the prior art, petrochemical products such as low-viscosity light oil or heavy oil are usually added as regeneration agents to reduce the overall asphalt viscosity to a range that meets regulatory standards. However, although these regeneration agents made by adding light oil or heavy oil can reduce viscosity, they are relatively expensive and need to be heated before use. They are prone to volatilization and combustion during the high-temperature production process. In addition, the use of petroleum regeneration agents will substantially increase the asphalt content of asphalt concrete, which will cause the asphalt concrete pavement to be softer due to excessive asphalt content, and prone to problems such as rutting and deformation.

[0030] Therefore, the viscosity reducer of asphalt reclaimed material of the present invention is to reduce the aged asphalt (such as Figure 1 The asphalt 130B) is dispersed to reduce the viscosity of the asphalt. In addition, the asphalt reclaimed material viscosity reducer of the present invention does not increase the asphalt content of the asphalt concrete recycled material, and does not cause rutting and deformation of the asphalt concrete pavement.

[0031] Further, in order to explain in more detail the mechanism of the asphalt recycled material viscosity reducer of the present invention in treating asphalt concrete recycled material containing aged asphalt, please refer to Figure 2 , Figure 2 2 is a flow chart of a method for preparing a viscosity reducer for recycled asphalt according to some embodiments of the present invention, namely, preparation process 200.

[0032] In step S201, 10wt% to 40wt% of a surfactant dispersant, 20wt% to 40wt% of a penetrant, 1wt% to 5wt% of a plasticizer, 0wt% to 5wt% of an emulsifier and 10wt% to 69wt% of a diluent are weighed respectively as raw materials for the viscosity reducer of recycled asphalt.

[0033] Next, in step S203, the surfactant dispersant and the penetrant are placed in a stirring tank. In step S205, the temperature of the stirring tank is raised to 40° C. to 70° C., and the mixture is stirred at a speed of 300 rpm to 500 rpm for 10 to 15 minutes to mix them evenly.

[0034] Next, in step S207, the same temperature is maintained, a diluent is added, and the mixture is stirred at a speed of 300 rpm to 500 rpm for 10 to 15 minutes to be uniformly mixed.

[0035] Then, in step S209, a plasticizer and / or an emulsifier is added, and the mixture is stirred at a speed of 300 rpm to 500 rpm for 15 to 30 minutes to be uniformly mixed. Then, in step S211, the mixture is cooled to room temperature to obtain a finished product of the asphalt recycled material viscosity reducer.

[0036] Furthermore, an embodiment of the present invention provides a method for applying a viscosity reducer for recycled asphalt to recycled asphalt concrete. Figure 3 , Figure 3 It is a flow chart of a method for applying a viscosity reducer for recycled asphalt material to recycled asphalt concrete material according to some embodiments of the present invention, namely, a processing flow 300 .

[0037] First, in step S301, the asphalt concrete recycled material is crushed. Then, in step S303, the crushed asphalt concrete recycled material is mixed with new concrete material. It is worth mentioning that in some embodiments, step S303 can be omitted, that is, in some embodiments, new concrete material can be added.

[0038] Next, in step S305, the crushed asphalt concrete recycled material is mixed with new asphalt and stirred at 145°C to 180°C to form a recycled material mixture. In the embodiment of performing step S303, the recycled material mixture further includes new concrete material. In addition, the asphalt concrete recycled material includes aged asphalt. In addition, aged asphalt refers to agglomerated asphalt formed by changes in the structure of asphalt due to oxidation and high temperature, such as Figure 1 Aged Asphalt 100B.

[0039] Next, in step S307, a viscosity reducer for the recycled asphalt is added and mixed at 145° C. to 180° C. Then, in step S309, asphalt concrete recycled material is obtained.

[0040] For further information, see Figure 4 , Figure 4 It is a schematic diagram of the principle process of dispersing aged asphalt in asphalt concrete recycled material through asphalt recycled material viscosity reducer according to some embodiments of the present invention.

[0041] Process S401 shows a schematic diagram of the agglomerated aged asphalt 130B. Next, in process S403, the asphalt recycled material viscosity reducer is added. In addition, the oleophilic end 410B of the surfactant dispersant 410 in the asphalt recycled material viscosity reducer will be adsorbed on the surface of the aged asphalt 130B. In addition, it is worth mentioning that the penetrant ( Figure 4 (not shown) will make it easier for the surfactant dispersant 410 to penetrate into the aged asphalt 130B to enhance the effect of the oleophilic end 410B being adsorbed on the surface of the aged asphalt 130B.

[0042] After the lipophilic end 410B of the surfactant dispersant 410 is adsorbed on the surface of the non-polar aged asphalt 130B, the agglomerated aged asphalt is separated by the charge repulsion of the like charges between the hydrophilic ends 410A of the surfactant dispersant 410. For example, in process S403, the charge repulsions 420A and 420B are represented by dashed arrows, and the charge repulsions 420A and 420B pull the aged asphalt 130B apart in opposite directions. Then, as shown in process S405, the agglomerated aged asphalt 130B is dispersed by the charge repulsion (e.g., the charge repulsions 420A and 420B).

[0043] By utilizing the characteristics of the lipophilic end 410B and the hydrophilic end 410A of the surfactant dispersant 410 of the asphalt recycled material viscosity reducer of the present invention, and the mechanism of dispersing the aged asphalt 130B generated by the characteristics of the surfactant dispersant 410, the viscosity of the asphalt is reduced without increasing the overall asphalt content, thereby producing asphalt concrete recycled material that meets the standards and is of high quality.

[0044] Next, various embodiments and comparative examples are used to illustrate various results and characteristics of treating asphalt concrete recycled material with the asphalt recycled material viscosity reducer of the present invention.

[0045] First, the processing and characteristics of Comparative Examples 1 to 6 and Examples 1 to 6 will be described in sections below, where Comparative Examples 1 to 6 correspond to Examples 1 to 6, respectively, as shown in Tables 2 to 7.

[0046] Comparative Examples 1 to 6 are about the processing and characteristics of asphalt concrete recycled materials. The processing method of the asphalt concrete recycled materials in Comparative Examples 1 to 6 is: toluene solvent is used to extract asphalt from 1000 kg (kg) of asphalt concrete recycled materials, and the asphalt concrete recycled materials in Comparative Examples 1 to 6 respectively contain different weights of aged asphalt (in kilograms, as shown in Tables 2 to 7 below). Then, the viscosity test method (Taiwan 14186 standard inspection regulations) is used to test the viscosity of the asphalt.

[0047] Examples 1 to 6 are about the preparation formula of the viscosity reducer for recycled asphalt, the processing process and characteristics of recycled asphalt concrete.

[0048] Furthermore, the method for processing asphalt concrete recycled materials in Examples 1 to 6 is: taking asphalt concrete recycled materials with a total weight of 1000 kilograms (Kg) respectively, and the asphalt concrete recycled materials in Examples 1 to 6 respectively contain different weights of aged asphalt (in kilograms, and the same as the weight of aged asphalt in the comparative example corresponding to the embodiment. For example, the weight of aged asphalt contained in the asphalt concrete recycled material in Comparative Example 1 is 42.2 kilograms, and the weight of aged asphalt contained in the asphalt concrete recycled material in Example 1 is also 42.2 kilograms).

[0049] Then, a total weight of 2 kg of asphalt recycled material viscosity reducers of different formulations of Examples 1 to 6 was added, that is, the weight ratio of asphalt concrete recycled material to asphalt recycled material viscosity reducer was 500:1, wherein the asphalt recycled material viscosity reducer formulations of Examples 1 to 6 are shown in Table 1. Then, the mixture was mixed at 145°C to 180°C to form asphalt concrete recycled material. Then, toluene solvent was used to extract asphalt from the asphalt concrete recycled material, and the viscosity of the asphalt was tested using the viscosity test method (Standard Inspection Regulations 14186 in Taiwan, China).

[0050] Next, please refer to Table 1, which is a summary table of the asphalt recycled material viscosity reducer formulas of Examples 1 to 6, wherein the total weight of the asphalt recycled material viscosity reducer is calculated as 100 wt%.

[0051] Table 1

[0052]

[0053] Next, please refer to Tables 2 to 7. Tables 2 to 7 show the test results and characteristics of each group of Examples 1 to 6 and Comparative Examples 1 to 6.

[0054] In addition, in Tables 2 to 7, the asphalt content of the asphalt concrete recycled materials of Comparative Examples 1 to 6 is calculated as follows: Formula (1): (weight of extracted asphalt (Kg) / weight of asphalt concrete recycled material (Kg))*100%, in units of wt%. The asphalt content of the asphalt concrete recycled materials of Examples 1 to 6 is calculated as follows: Formula (2): (weight of extracted asphalt (Kg) / weight of asphalt concrete recycled material (Kg))*100%, in units of wt%. The viscosity reduction rate (%) is calculated as follows: Formula (3): ((viscosity of the example - viscosity of the comparative example) / viscosity of the comparative example)*100%.

[0055] Table 2

[0056]

[0057] Note: P: viscosity unit, unit: g·s-1·cm-1.

[0058] The surfactant dispersant of the asphalt recycled material viscosity reducer of Example 1 is, for example, lignin sulfonate, the penetrant is, for example, polyol polyoxyethylene ether, and the plasticizer is, for example, sodium carboxymethyl starch.

[0059] Table 3

[0060]

[0061] The surfactant dispersant of the asphalt recycled material viscosity reducer of Example 2 is, for example, an aromatic sulfonate-formaldehyde condensate, the penetrant is, for example, a polyol polyoxyethylene ether, and the plasticizer is, for example, sodium carboxymethyl starch.

[0062] Table 4

[0063]

[0064] The surfactant dispersant of the asphalt recycled material viscosity reducer of Example 3 is, for example, aromatic sulfonate-formaldehyde condensate, the penetrant is, for example, alkyl polyoxyethylene ether alcohol phosphate, the plasticizer is, for example, carboxymethyl cellulose, and the emulsifier is, for example, carboxylates.

[0065] Table 5

[0066]

[0067] The surfactant dispersant of the asphalt recycled material viscosity reducer of Example 4 is, for example, aliphatic hydroxysulfonate-formaldehyde condensate, the penetrant is, for example, polyol polyoxyethylene ether, and the plasticizer is, for example, triethyl citrate.

[0068] Table 6

[0069]

[0070] The surfactant dispersant of the asphalt recycled material viscosity reducer of Example 5 is, for example, a polycarboxylic acid compound, the penetrant is, for example, an alkyl polyoxyethylene ether, and the plasticizer is, for example, carboxymethyl cellulose.

[0071] Table 7

[0072]

[0073] The surfactant dispersant of the asphalt recycled material viscosity reducer of Example 6 is, for example, a polycarboxylic acid compound, the penetrant is, for example, an alkyl polyoxyethylene ether, and the plasticizer is, for example, carboxymethyl cellulose.

[0074] From Tables 1 to 6, it can be seen that compared with Comparative Examples 1 to 6, the asphalt concrete recycled materials of Examples 1 to 6 can effectively reduce the viscosity of asphalt in the asphalt concrete recycled materials. In addition, the viscosity reduction rate of the asphalt in the asphalt concrete recycled materials of Examples 1 to 6 ranges from 11% to 33%, and among Examples 1 to 6, the viscosity reduction rate of Example 6 is the best. In addition, by comparing the asphalt content between various comparative examples and various embodiments, it can be seen that adding the asphalt recycled material viscosity reducer of Examples 1 to 6 does not increase the asphalt content of the asphalt concrete recycled materials.

[0075] The following will describe the production process, processing process and characteristics of Comparative Examples 7-1, 7-2, 8-1 and 8-2 and Examples 7 and 8 in sections.

[0076] Comparative Examples 7-1 and 8-1 are about the processing and characteristics of asphalt concrete recycled materials. The processing methods of asphalt concrete recycled materials in Comparative Examples 7-1 and 8-1 are the same as those in Comparative Examples 1 to 6, and the calculation method of asphalt content is also the same, which will not be repeated here.

[0077] Comparative Examples 7-2 and 8-2 are about the processing process and characteristics of asphalt concrete recycled materials. The processing method of the asphalt concrete recycled materials of Comparative Examples 7-2 and 8-2 is: take 1000 kg of asphalt concrete recycled materials (the weight of aged asphalt in the asphalt concrete recycled materials is the same as the weight of aged asphalt in the comparative example corresponding to the embodiment), add a total weight of 8.5 kg of new asphalt (the ratio of asphalt concrete recycled materials to new asphalt is 1000:8.5), and mix at 145°C to 180°C to form the asphalt concrete recycled materials of Comparative Examples 7-2 and 8-2. Then, asphalt is extracted from the asphalt concrete recycled materials of Comparative Examples 7-2 and 8-2. Then, the viscosity of asphalt is tested using the viscosity test method (Standard Inspection Regulations 14186 in Taiwan, China). In addition, the algorithms for calculating the asphalt content and viscosity reduction rate in the asphalt concrete recycled materials of Comparative Examples 7-2 and 8-2 are as shown in Formulas (2) and (3), respectively, and will not be repeated here.

[0078] Examples 7 and 8 are about the preparation formula of asphalt recycled material viscosity reducer, the processing process and characteristics of asphalt concrete recycled material. The processing method of asphalt concrete recycled material in Examples 7 and 8 is as follows: Processing asphalt concrete recycled material: take a total weight of 1000 kilograms (Kg) of asphalt concrete recycled material (the weight of the aged asphalt included is the same as the weight of the aged asphalt in the corresponding comparative example), add a total weight of 2 kilograms of asphalt recycled material viscosity reducers of different formulas in Examples 7 and 8 and a total weight of 8.5 kilograms of new asphalt (the weight ratio of asphalt concrete recycled material, asphalt recycled material viscosity reducer and new asphalt is 1000:2:8.5), and mix at 145°C to 180°C to form the asphalt concrete recycled material of Examples 7 and 8.

[0079] Next, toluene solvent was used to extract asphalt from the asphalt concrete recycled materials of Examples 7 and 8, and the viscosity of the asphalt was tested using the viscosity test method (Taiwan Standard 14186). In addition, the calculation methods for asphalt content and viscosity reduction rate in the asphalt concrete recycled materials of Examples 7 and 8 are as shown in Formulas (2) and (3), respectively, and will not be repeated here.

[0080] Next, please refer to Table 8, which is a summary table of the asphalt recycled material viscosity reducer formulas of Examples 7 and 8, wherein the total weight of the asphalt recycled material viscosity reducer is calculated as 100 wt%.

[0081] Table 8

[0082]

[0083] Next, please refer to Tables 9 and 10. Tables 9 and 10 show the test results and characteristics of each group of Examples 7 to 8 and Comparative Examples 7-1 to 8-2.

[0084] Table 9

[0085]

[0086] The surfactant dispersant of the asphalt recycled material viscosity reducer of Example 7 is, for example, a polycarboxylic acid compound, the penetrant is, for example, an alkyl polyoxyethylene ether, and the plasticizer is, for example, triethyl citrate.

[0087] Table 10

[0088]

[0089] The surfactant dispersant of the asphalt recycled material viscosity reducer of Example 8 is, for example, a polycarboxylic acid compound, the penetrant is, for example, a polyol polyoxyethylene ether, and the plasticizer is, for example, triethyl citrate.

[0090] It can be seen from Table 7 and Table 8 that compared with the asphalt viscosity of the asphalt concrete recycled materials of Comparative Examples 7-1 and 8-1, the asphalt viscosity of Examples 7 and 8 is significantly reduced, and the viscosity reduction rate can reach more than 60%, among which the viscosity reduction rate of Example 8 even reaches more than 65%.

[0091] Moreover, compared with the asphalt viscosity of the asphalt concrete recycled materials of Comparative Examples 7-2 and 8-2, the asphalt viscosity of Examples 7 and 8 is also significantly different. The difference in viscosity reduction rate between Comparative Examples 7-2 and 8-2 and Examples 7 and 8 can reach more than 25%.

[0092] In addition, by comparing the asphalt content of Comparative Example 7-2 and Comparative Example 8-2 with that of Example 7 and Example 8, it can be seen that adding the asphalt recycled material viscosity reducer does not increase the asphalt content of the asphalt concrete recycled material.

[0093] The following will describe the manufacturing process, processing process and characteristics of Comparative Examples 9-1, 9-2, 10-1, 10-2, 11-1 and 11-2 and Examples 9, 10 and 11 in sections.

[0094] Comparative Examples 9-1, 10-1 and 11-1 are about the processing and characteristics of asphalt concrete recycled materials. The processing methods of asphalt concrete recycled materials in Comparative Examples 9-1, 10-1 and 11-1 are the same as those in Comparative Examples 1 to 6, and the calculation method of asphalt content is also the same, which will not be repeated here.

[0095] Comparative Examples 9-2, 10-2 and 11-2 are about the processing process and characteristics of asphalt concrete recycled materials. The processing method of the asphalt concrete recycled materials of Comparative Examples 9-2 and 10-2 is: a total weight of 500 kg of asphalt concrete recycled materials (containing the same weight of aged asphalt as the corresponding comparative example) and a total weight of 500 kg of new concrete material are mixed. Then, a total weight of 30.5 kg of new asphalt is added (the ratio of asphalt concrete recycled materials, new concrete materials and new asphalt is 500:500:30.5), and mixed at 145°C to 180°C to form the asphalt concrete recycled materials of Comparative Examples 9-2 and 10-2. The asphalt content calculation method of the asphalt concrete recycled materials of Examples 9, 10, 11, Comparative Examples 9-2, 10-2 and 11-2 is similar to Formula (2) and the viscosity reduction rate is similar to Formula (2) and Formula (3), respectively, and will not be repeated here.

[0096] The processing method of the asphalt concrete recycled material of Comparative Example 11-2 is as follows: 450 kg of asphalt concrete recycled material (containing the same weight of aged asphalt as the corresponding comparative example) and 550 kg of new concrete material are mixed. Then, 32.8 kg of new asphalt is added (the weight ratio of asphalt concrete recycled material, new concrete material and new asphalt is 450:550:32.8), and mixed at 145°C to 180°C for 30 seconds to form the asphalt concrete recycled material of Comparative Example 11-2.

[0097] Toluene solvent was used to extract asphalt from the asphalt concrete recycled materials of Comparative Examples 9-2, 10-2 and 11-2. Then, the viscosity of the asphalt was tested using the viscosity test method (Taiwan 14186 standard test regulations).

[0098] Examples 9, 10 and 11 are about the preparation formula of the viscosity reducer for recycled asphalt, the processing process and characteristics of recycled asphalt concrete. The processing method of the viscosity reducer for recycled asphalt in Examples 9 and 10 is as follows: a total weight of 500 kg of recycled asphalt concrete (including the same weight of aged asphalt as the corresponding comparative example) and a total weight of 500 kg of new concrete are mixed. Then, a total weight of 2 kg of the viscosity reducer for recycled asphalt and a total weight of 30.5 kg of new asphalt are added (the weight ratio of recycled asphalt concrete, recycled asphalt viscosity reducer and new asphalt is 500:500:2:30.5), and mixed at 145°C to 180°C to form the recycled asphalt concrete of Examples 9 and 10.

[0099] The processing method of the asphalt recycled material viscosity reducer of Example 11 is as follows: 450 kg of asphalt concrete recycled material (including the same weight of aged asphalt as the corresponding comparative example) and 550 kg of new concrete material are mixed. Then, 3 kg of the asphalt recycled material viscosity reducer and 32.8 kg of new asphalt are added (the weight ratio of asphalt concrete recycled material, asphalt recycled material viscosity reducer and new asphalt is 450:550:3:32.8), and mixed at 145°C to 180°C to form the asphalt concrete recycled material of Example 11.

[0100] Next, toluene solvent was used to extract asphalt from the asphalt concrete recycled materials of Examples 9, 10 and 11, and the viscosity of the asphalt was tested using the viscosity test method (Taiwan Standard 14186). The asphalt content calculation method of the asphalt concrete recycled materials of Examples 9, 10 and 11 is similar to Formula (2) and the viscosity reduction rate is similar to Formula (2) and Formula (3), respectively, and will not be repeated here.

[0101] The formulations of the asphalt recycled material viscosity reducers of Examples 9, 10 and 11 are shown in Table 11.

[0102] Table 11

[0103]

[0104] Next, please refer to Tables 12 to 14. Tables 12 to 14 show the test results and characteristics of each group of Examples 9 to 11 and Comparative Examples 9-1 to 11-2.

[0105] Table 12

[0106]

[0107] The surfactant dispersant of the asphalt recycled material viscosity reducer of Example 9 is, for example, a polycarboxylic acid compound, the penetrant is, for example, a polyol polyoxyethylene ether, and the plasticizer is, for example, triethyl citrate.

[0108] Table 13

[0109]

[0110] The surfactant dispersant of the asphalt recycled material viscosity reducer of Example 10 is, for example, a polycarboxylic acid compound, the penetrant is, for example, an alkyl polyoxyethylene ether alcohol phosphate, the plasticizer is, for example, triethyl citrate, and the emulsifier is, for example, a carboxylate.

[0111] Table 14

[0112]

[0113] The surfactant dispersant of the asphalt recycled material viscosity reducer of Example 11 is, for example, a polycarboxylic acid compound, the penetrant is, for example, polyol polyoxyethylene ether, and the plasticizer is, for example, sodium carboxymethyl starch.

[0114] It can be seen from Table 12, Table 13 and Table 14 that compared with the asphalt viscosity of the asphalt concrete recycled materials of Comparative Example 9-1, Comparative Example 10-1 and Comparative Example 11-1, the asphalt viscosity of Examples 9, 10 and 11 is significantly reduced, and the viscosity reduction rate can reach more than 85%. In addition, it can be seen from Examples 9 and 10 that adding 2 kg of the asphalt recycled material viscosity reducer can effectively reduce the asphalt viscosity of the asphalt concrete recycled material containing 50% asphalt concrete recycled material.

[0115] Moreover, compared with the asphalt viscosity of the asphalt concrete recycled materials of Comparative Examples 9-2 and 10-2, the asphalt viscosity of Examples 9 and 10 is also significantly different.

[0116] In addition, by comparing the asphalt content of Comparative Examples 9-2, 10-2 and 11-2 with that of Examples 9, 10 and 11, it can be seen that adding the asphalt recycled material viscosity reducer does not increase the asphalt content of the asphalt concrete recycled material.

[0117] In summary, the asphalt recycled material viscosity reducer of the present invention has the advantages of low preparation cost and simple preparation method. In addition, the asphalt recycled material viscosity reducer of the present invention can be used for the regeneration of asphalt concrete recycled material. Through the surfactant dispersant and penetrant of the asphalt recycled material viscosity reducer, the aged asphalt can be effectively dispersed, thereby reducing the viscosity of the aged asphalt. In addition, it can promote the effective fusion of aged asphalt and new asphalt, and can optimize the performance of asphalt concrete recycled material, provide better workability, so that the aged asphalt concrete recycled material can be reused, with good resource utilization and economic benefits.

[0118] In addition, the use of asphalt recycled material viscosity reducer to regenerate asphalt concrete recycled material does not require the addition of low-viscosity light oil or heavy oil and other petrochemical products, so there will be no problem of combustion caused by volatilization during the high-temperature production process. In addition, since the asphalt recycled material viscosity reducer does not contain oily components such as light oil or heavy oil, it will not affect the asphalt content of the generated asphalt recycled material. Therefore, there will be no problems such as rutting and deformation of the asphalt concrete road surface due to excessive asphalt content making the road surface softer.

[0119] Although the present invention has been disclosed as above by the embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the scope of the attached patent application.

[0120] Explanation of symbols

[0121] 100A : Asphalt

[0122] 100B : Aged Asphalt

[0123] 110A,110B: Aromatic hydrocarbons

[0124] 120A: Saturated hydrocarbons

[0125] 130A : Asphalt concentrate

[0126] 130B : Aged Asphalt / Asphalt Extract

[0127] 200: Preparation process

[0128] 300: Processing flow

[0129] 410: Surfactant dispersant

[0130] 410A: Hydrophilic end

[0131] 410B: lipophilic end

[0132] 420A, 420B: Charge repulsion

[0133] S201, S203, S205, S207, S209, S211: Steps

[0134] S 301, S 303, S 305, S 307, S 309: Steps

[0135] S 401, S 403, S 405: Process

Claims

1. A viscosity reducer for recycled asphalt, characterized in that: Include: A surfactant dispersant, 10% to 40% by weight; A penetrant, 20% to 40% by weight; A plasticizer, the weight percentage is 1% to 5%; an emulsifier, the weight percentage is 0% to 5%; as well as - diluent, which is the balance.

2. The asphalt recycled material viscosity reducer according to claim 1, characterized in that: The surfactant dispersant is lignin sulfonate, humic acid sulfonate, polyoxyindene resin sulfonate, aromatic sulfonate-formaldehyde condensate, aliphatic hydroxy sulfonate-formaldehyde condensate, phenyl polyoxyethylene ether-formaldehyde condensate, polycarboxylic acid compound or a combination thereof.

3. The asphalt recycled material viscosity reducer according to claim 1, characterized in that: The penetrant is an alkyl polyoxyethylene ether, an alkylphenol polyoxyethylene ether, an aromatic hydrocarbon polyoxyethylene ether, a styrene aromatic hydrocarbon polyoxyethylene ether, a polyol polyoxyethylene ether, an alkylamine polyoxyethylene ether, an alkyl polyoxyethylene polyoxypropylene ether, an alkylphenol polyoxyethylene polyoxypropylene ether, an aromatic hydrocarbon polyoxyethylene polyoxypropylene ether, a styrene aromatic hydrocarbon polyoxyethylene polyoxypropylene ether, a polyol polyoxyethylene polyoxypropylene ether, an alkylamine polyoxyethylene polyoxypropylene ether, an alkyl phosphate, an alkyl polyoxyethylene ether alcohol phosphate, an alkylphenol polyoxyethylene ether alcohol phosphate, an ethoxylated fatty alcohol, a fatty alcohol polyoxyethylene ether, a fatty alcohol polyether amide, a polyurethane, a polyurethane-acrylic copolymer or a combination thereof.

4. The asphalt recycled material viscosity reducer according to claim 1, characterized in that: The plasticizer is sodium carboxymethyl starch, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, triethyl citrate, acetyl triethyl citrate, tributyl citrate, acetyl tributyl citrate, acetyl trihexyl citrate, acetylated monoglyceride, dibutyl maleate, tributyl phosphate, phthalates, terephthalates or a combination thereof.

5. The asphalt recycled material viscosity reducer according to claim 1, characterized in that: The emulsifier is a carboxylate emulsifier, a sulfonate emulsifier, an ammonium salt emulsifier, an alkylphenol polyoxyethylene ether emulsifier, a benzylphenol polyoxyethylene ether, a phenethylphenol polyoxyethylene ether, a fatty alcohol polyoxyethylene ether or a combination thereof.

6. A method for preparing a viscosity reducer for asphalt recycling material, characterized in that: include: Weigh 10 wt % to 40 wt % of a surfactant dispersant, 20 wt % to 40 wt % of a penetrant, 1 wt % to 5 wt % of a plasticizer, 0 wt % to 5 wt % of an emulsifier, and the remainder of a diluent; Placing the surfactant dispersant and the penetrant in a stirring tank; The stirring tank is heated to 40° C. to 70° C. and stirred at a rotation speed of 300 rpm to 500 rpm for 10 to 15 minutes; Maintaining the same temperature, adding the diluent, and stirring at the rotation speed for 10 to 15 minutes; After the diluent is uniformly mixed with the surfactant dispersant and the penetrant, the plasticizer is added and stirred at the speed for 15 to 30 minutes; as well as The plasticizer is mixed with the diluent, the surfactant dispersant and the penetrant uniformly, and then cooled to room temperature.

7. The method according to claim 6, characterized in that The emulsifier is added at the same time as the plasticizer is added.

8. A method for applying a viscosity reducer for recycled asphalt materials to recycled asphalt concrete materials, characterized in that: include: Provided is an asphalt concrete recycling material, wherein the asphalt concrete recycling material comprises an aged asphalt Add new asphalt; as well as The asphalt concrete recycled material and the new asphalt are mixed evenly at a temperature of 145° C. to 180° C., an asphalt recycled material viscosity reducer is added, and the mixing is continued at the same temperature to obtain an asphalt concrete recycled material; The asphalt recycled material viscosity reducer comprises a surfactant dispersant, and the surfactant dispersant comprises a plurality of hydrophilic ends and a plurality of oleophilic ends, and After the oleophilic ends are adsorbed on the surface of the aged asphalt, the agglomerated aged asphalt is dispersed through the charge repulsion of the like charges between the hydrophilic ends, thereby reducing the asphalt viscosity of the asphalt concrete recycled material.

9. A method for applying a viscosity reducer for recycled asphalt materials to recycled asphalt concrete materials, characterized in that: include: Mixing a recycled asphalt concrete material and a new concrete material, and mixing them uniformly at a temperature of 145° C. to 180° C. to form a first recycled material mixture, wherein the recycled asphalt concrete material includes an aged asphalt; Adding new asphalt to the first recycled material mixture, and mixing them uniformly at the temperature to form a second recycled material mixture; and Adding an asphalt recycled material viscosity reducer to the second recycled material mixture, and continuing to mix evenly at the temperature to obtain an asphalt concrete recycled material; The asphalt recycled material viscosity reducer comprises a surfactant dispersant, and the surfactant dispersant comprises a plurality of hydrophilic ends and a plurality of oleophilic ends, and After the oleophilic ends are adsorbed on the surface of the aged asphalt, the agglomerated aged asphalt is dispersed through the charge repulsion of the like charges between the hydrophilic ends, thereby reducing the asphalt viscosity of the asphalt concrete recycled material.

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