Cold-in-place recycled asphalt emulsifier as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of fine chemical engineering, and relates to a cold-in-place recycling asphalt emulsifier as well as a preparation method and application thereof. The molecular structure general formula of the cold-in-place recycling asphalt emulsifier is # imgabs0 #, the in-situ cold recycling asphalt emulsifier is prepared from alkylphenol polyoxyethylene ether, isopropanol, maleic anhydride, a polyamine compound and a propylene compound according to a molar ratio of 1: (3 to 10): (1.00 to 1.08): (1.00 to 1.30): (1.00 to 1.35). The cold-in-place recycled asphalt emulsifier has the characteristics of low production cost, wide raw material source and simple preparation process. The cold-in-place recycled cationic emulsified asphalt disclosed by the invention has good storage stability, relatively long mixing time and construction workability, and good adhesion with aggregate.

Description

Technical Field

[0001] The invention relates to an in-situ cold regenerated asphalt emulsifier and a preparation method and application thereof, belonging to the technical field of fine chemical industry. Background Art

[0002] Asphalt cold recycling technology is to mix and spread waste asphalt mixture, newly added stone, cement, emulsified asphalt, polymer latex, etc. in appropriate proportions to form a new asphalt pavement that meets road performance requirements. Asphalt cold recycling technology is divided into factory-mixed cold recycling and in-situ cold recycling.

[0003] The key to asphalt cold recycling technology lies in the cold recycled asphalt emulsifier used. At present, the cold recycled asphalt emulsifiers on the market are of a single variety and have a limited scope of application. In the process of on-site cold recycling construction, there are often problems such as poor adhesion with waste asphalt mixtures, long traffic opening time, and long initial setting time, which limits its application.

[0004] The production of cold recycled asphalt emulsifiers generally has the disadvantages of high production costs, limited raw materials, and complex and difficult preparation processes.

[0005] In summary, it is necessary to develop a new type of cold recycled asphalt emulsifier, so that its production cost is lower, the production process is simpler, and it has better performance to meet the application needs of on-site cold recycling in road construction. Summary of the invention

[0006] In view of the deficiencies in the prior art, the purpose of the present invention is to provide an on-site cold regeneration asphalt emulsifier with lower production cost, simpler production process and better performance to meet the on-site cold regeneration application needs of road construction, as well as its preparation method and application.

[0007] To achieve the above object, the present invention adopts the following technical solution:

[0008] The first aspect of the present invention provides an in-situ cold regeneration asphalt emulsifier, the general molecular structure of which is:

[0009] ,

[0010] Wherein, R1 is an alkyl group having 8 to 12 carbon atoms;

[0011] n is an integer from 7 to 30;

[0012] R2 is:

[0013] ;

[0014] ;

[0015] ;

[0016] ;

[0017] ;

[0018] ;

[0019] ;

[0020] ;

[0021] or

[0022] ;

[0023] Wherein, m is an integer from 1 to 3;

[0024] R3 is H or hydroxyethyl (-CH2CH2OH).

[0025] The second aspect of the present invention provides a method for preparing an in-situ cold regenerated asphalt emulsifier, comprising the following steps:

[0026] 1) Mixing a polyamine compound, isopropanol and a propylene compound to react to obtain a reaction intermediate I, wherein the general structural formula of the reaction intermediate I is:

[0027] ;

[0028] Where R2 is:

[0029] ;

[0030] ;

[0031] ;

[0032] ;

[0033] ;

[0034] ;

[0035] ;

[0036] ;

[0037] or

[0038] ;

[0039] Wherein, m is an integer from 1 to 3;

[0040] R3 is H or hydroxyethyl (-CH2CH2OH);

[0041] 2) Mixing alkylphenol polyoxyethylene ether and maleic anhydride to react to obtain a reaction intermediate II, the general structural formula of the reaction intermediate II is:

[0042] ;

[0043] Wherein, R1 is an alkyl group having 8 to 12 carbon atoms;

[0044] n is an integer from 7 to 30;

[0045] 3) Adding reaction intermediate II to reaction intermediate I, mixing and reacting, and obtaining in-situ cold recycled asphalt emulsifier.

[0046] The third aspect of the present invention provides a method for preparing a cationic in-situ cold regenerated asphalt emulsified, comprising the following steps: the amount of the in-situ cold regenerated asphalt emulsifier used is 1.5-3.0% of the total mass of the prepared cationic in-situ cold regenerated asphalt emulsified, the in-situ cold regenerated asphalt emulsifier is added with water to prepare an asphalt emulsifier aqueous solution, and the pH value is adjusted to 2.0-3.0 with industrial hydrochloric acid, and heated to 60.0-70.0°C to obtain an asphalt emulsifier soap solution; the heated asphalt and the asphalt emulsifier soap solution are emulsified by a colloid mill to prepare a cationic in-situ cold regenerated emulsified asphalt.

[0047] The cationic in-situ cold-regenerated emulsified asphalt prepared by the above preparation method.

[0048] In the fourth aspect of the present invention, there is provided a use of the in-situ cold regenerated asphalt emulsifier described in the first aspect as a cationic in-situ cold regenerated emulsified asphalt.

[0049] The above-mentioned application is to mix and spread waste asphalt mixture, newly added stone, cement, water, cationic in-situ cold recycled emulsified asphalt, and SBR latex in appropriate proportions to form a new asphalt pavement that meets road performance requirements.

[0050] The specific embodiments of the present invention have the following beneficial effects:

[0051] (1) The in-situ cold regeneration asphalt emulsifier of the present invention overcomes the problems of poor adhesion with waste asphalt mixture, long traffic opening time and long initial setting time that often occur in the current in-situ cold regeneration construction process, and has a good application prospect.

[0052] (2) The in-situ cold regenerated asphalt emulsifier of the present invention has the advantages of low production cost, wide source of raw materials, simple preparation process, and better performance, and is easy to promote and apply.

[0053] (3) The in-situ cold-regenerated cationic emulsified asphalt of the present invention has good storage stability, a long mixing time and construction workability, and has good adhesion to aggregates.

[0054] (4) The present invention adds polyamine compounds, propylene compounds, alkylphenol polyoxyethylene ether and maleic anhydride to react, so that the in-situ cold regeneration asphalt emulsifier prepared by the present invention has high hydrophilicity. The hydrophilic groups contained are ether groups, hydroxyl groups, carbonyl groups, aldehyde groups, carboxyl groups, amine groups and amide groups, which improves the stability of the emulsified asphalt.

[0055] (5) The present invention uses specific raw materials to synthesize an in-situ cold-regenerated asphalt emulsifier with a specific HLB value. The prepared emulsified asphalt has excellent performance indicators and has the characteristics of slow cracking and fast setting. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0057] Figure 1 It is the infrared spectrum of the asphalt emulsifier of Example 1 of the present invention.

[0058] Figure 2 It is the infrared spectrum of the asphalt emulsifier of Example 2 of the present invention.

[0059] Figure 3 It is the infrared spectrum of the asphalt emulsifier of Example 3 of the present invention. DETAILED DESCRIPTION

[0060] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used in the present application have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0061] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0062] In one embodiment of the present invention, an in-situ cold regeneration asphalt emulsifier is provided, and its molecular structure is as follows:

[0063] ,

[0064] Wherein, R1 is an alkyl group having 8 to 12 carbon atoms;

[0065] n is an integer from 7 to 30;

[0066] R2 is:

[0067] ;

[0068] ;

[0069] ;

[0070] ;

[0071] ;

[0072] ;

[0073] ;

[0074] ;

[0075] or

[0076] ;

[0077] Wherein, m is an integer from 1 to 3;

[0078] R3 is H or hydroxyethyl (-CH2CH2OH).

[0079] The in-situ cold regenerated asphalt emulsifier disclosed in the embodiment of the present invention connects ether, hydroxyl, carbonyl, aldehyde, carboxyl, amine and amide hydrophilic groups in a certain way, and cooperates with long-chain alkyl lipophilic groups and benzene rings to form a new structure of in-situ cold regenerated asphalt emulsifier molecule.

[0080] In one embodiment of the present invention, a method for preparing the above-mentioned in-situ cold regenerated asphalt emulsifier is provided, comprising the following steps:

[0081] 1) Mixing a polyamine compound, isopropanol and a propylene compound to react to obtain a reaction intermediate I, wherein the general structural formula of the reaction intermediate I is:

[0082] ;

[0083] Where R2 is:

[0084] ;

[0085] ;

[0086] ;

[0087] ;

[0088] ;

[0089] ;

[0090] ;

[0091] ;

[0092] or

[0093] ;

[0094] Wherein, m is an integer from 1 to 3;

[0095] R3 is H or hydroxyethyl (-CH2CH2OH);

[0096] 2) Mixing alkylphenol polyoxyethylene ether and maleic anhydride to react to obtain a reaction intermediate II, the general structural formula of the reaction intermediate II is:

[0097] ;

[0098] Wherein, R1 is an alkyl group having 8 to 12 carbon atoms;

[0099] n is an integer from 7 to 30;

[0100] 3) Adding reaction intermediate II to reaction intermediate I, mixing and reacting, and obtaining in-situ cold recycled asphalt emulsifier.

[0101] The general reaction equation is:

[0102] Step 1 reaction:

[0103] (1)

[0104] or

[0105] (2)

[0106] or

[0107] (3)

[0108] or

[0109] (4)

[0110] or

[0111] (5)

[0112] or

[0113] (6)

[0114] or

[0115] (7)

[0116] or

[0117] (8)

[0118] or

[0119] (9)

[0120] or

[0121] (10)

[0122] or

[0123] (11)

[0124] or

[0125] (12)

[0126] Step 2 reaction:

[0127] (13)

[0128] Step 3 reaction:

[0129] (14)

[0130] In a specific embodiment, the molar ratio of the alkylphenol polyoxyethylene ether, isopropyl alcohol, maleic anhydride, polyamine compounds and propylene compounds is 1:3-10:1.00-1.08:1.00-1.30:1.00-1.35.

[0131] In a specific embodiment, the alkylphenol polyoxyethylene ether is:

[0132] ,

[0133] Wherein, R1 is an alkyl group having 8 to 12 carbon atoms; and n is an integer of 7 to 30.

[0134] In a specific embodiment, the polyamine compound is triethylenetetramine, tetraethylenepentamine, diethylenetriamine, ethylenediamine, N-aminoethylpiperazine, or β-hydroxyethylethylenediamine.

[0135] In a specific embodiment, the acrylic compound is acrylic acid, acrolein or acrylamide.

[0136] In a specific embodiment, in step 1), during the synthesis of the reaction intermediate I, the reaction temperature is 65-82° C. and the reaction time is 2-4 h.

[0137] In a specific embodiment, in step 2), during the synthesis of reaction intermediate II, the reaction temperature is 90-100° C. and the reaction time is 2-4 h.

[0138] In a specific embodiment, in step 3), the reaction temperature is 65-82° C., and the reaction time is 2-4 h.

[0139] In a preferred embodiment, the preparation method of the above-mentioned in-situ cold regenerated asphalt emulsifier specifically comprises the following steps:

[0140] (1) Adding a polyamine compound and isopropanol into a reaction vessel, and then adding a propylene compound. After the addition is complete, stirring and reacting at 65-82° C. for 2-4 h to obtain a reaction intermediate I;

[0141] (2) Adding alkylphenol polyoxyethylene ether and maleic anhydride into another reaction container, heating and stirring, and reacting at 90-100° C. for 2-4 h to obtain reaction intermediate II;

[0142] (3) Add reaction intermediate II to reaction intermediate I, stir and react at 65-82°C for 2-4 h to obtain an in-situ cold recycled asphalt emulsifier.

[0143] In one embodiment of the present invention, a method for preparing a cationic in-situ cold regenerated emulsified asphalt is provided, comprising the following steps: the amount of the in-situ cold regenerated asphalt emulsifier used is 1.5-3.0% of the total mass of the prepared cationic in-situ cold regenerated emulsified asphalt, the in-situ cold regenerated asphalt emulsifier is added with water to prepare an asphalt emulsifier aqueous solution, and the pH value is adjusted to 2.0-3.0 with industrial hydrochloric acid, and heated to 60.0-70.0°C to obtain an asphalt emulsifier soap solution; the heated asphalt and the asphalt emulsifier soap solution are emulsified by a colloid mill to prepare a cationic in-situ cold regenerated emulsified asphalt.

[0144] The cationic in-situ cold-regenerated emulsified asphalt prepared by the above preparation method.

[0145] In one embodiment of the present invention, an in-situ cold regenerated asphalt emulsifier is provided as a cationic in-situ cold regenerated emulsified asphalt.

[0146] The above-mentioned application is to mix and spread the waste asphalt mixture, namely newly added stone, cement, water, cationic in-situ cold recycled emulsified asphalt, and SBR latex in appropriate proportions to form a new asphalt pavement that meets road performance requirements.

[0147] In order to enable those skilled in the art to more clearly understand the technical solution of the present application, the technical solution of the present application will be described in detail below in combination with specific embodiments and comparative examples.

[0148] Example 1

[0149] This embodiment provides an in-situ cold regeneration asphalt emulsifier and a preparation method and application thereof, comprising the following steps:

[0150] (1) Preparation of in-situ cold recycled asphalt emulsifier:

[0151] 1) Add 167.9 g of triethylenetetramine and 350 g of isopropanol into a reactor, then add 86.0 g of acrylamide, and stir at 75 °C for 3 h to obtain reaction intermediate I.

[0152] 2) In another reactor, add 1086 g OP-20 and 103.9 g maleic anhydride, heat and stir, and react at 95 °C for 3 h to obtain reaction intermediate II.

[0153] 3) Add reaction intermediate II to reaction intermediate I, stir and react at 75°C for 3 h to obtain an in-situ cold recycled asphalt emulsifier.

[0154] The above synthesized asphalt emulsifier product was subjected to infrared spectrum detection, and the analysis results were (see Figure 1 ): 2870 cm -1 (Peak 1) is the symmetric stretching vibration absorption peak of methylene, 1728 cm -1 (Peak 2) is the C=O stretching vibration absorption peak in the carboxyl and ester groups, 1671 cm -1 (Peak 3) is the C=O stretching vibration peak of amide, 1456 cm -1 (Peak 4) is the asymmetric bending vibration absorption peak of methylene, 1247 cm -1 (Peak 5) is the stretching vibration absorption peak of Ar-O, 1114 cm -1 (Peak 6) is ROR ' The stretching vibration absorption peak, 682 cm -1 (Peak 7) is the NH out-of-plane bending vibration absorption peak.

[0155] The reaction equation is:

[0156] (15)

[0157] (13)

[0158] Where R1 is -C8H 17 Alkyl; n is 20.

[0159] (16)

[0160] Where R1 is -C8H 17 alkyl.

[0161] (2) Preparation of in-situ cold-regenerated cationic emulsified asphalt:

[0162] Weigh 13.0 g of the cold-in-situ regenerated asphalt emulsifier prepared in this embodiment and add it to 200 g of water, adjust the pH value to 2.5 with industrial hydrochloric acid, and heat it to 60° C. to obtain asphalt emulsifier soap solution. Weigh 300 g of AH-70 asphalt and heat it to 120° C. The hot asphalt and asphalt emulsifier soap solution are passed through a colloid mill to prepare a cationic cold-in-situ regenerated cationic emulsified asphalt.

[0163] The prepared in-situ cold-regenerated cationic emulsified asphalt was tested: the emulsified asphalt was fine and uniform, the area covered with the aggregate was greater than 2 / 3, the charge was cationic, and all performance indicators were good.

[0164] (3) Application of cationic in-situ cold recycled emulsified asphalt:

[0165] The waste asphalt mixture, i.e. newly added stone, cement, water, cationic in-situ cold recycled emulsified asphalt and SBR latex are mixed and spread in a certain ratio, and the mixing time can be more than 3 minutes to form a new asphalt pavement that meets the road performance requirements.

[0166] Example 2

[0167] This embodiment provides an in-situ cold regeneration asphalt emulsifier and a preparation method and application thereof, comprising the following steps:

[0168] (1) Preparation of in-situ cold recycled asphalt emulsifier:

[0169] 1) Add 167.9 g of triethylenetetramine and 350 g of isopropanol into a reactor, then add 87.2 g of acrylic acid, and stir at 75°C for 3 h to obtain reaction intermediate I.

[0170] 2) In another reactor, add 1086 g OP-20 and 103.9 g maleic anhydride, heat and stir, and react at 95 °C for 3 h to obtain reaction intermediate II.

[0171] 3) Add reaction intermediate II to reaction intermediate I, stir and react at 75°C for 3 h to obtain an in-situ cold recycled asphalt emulsifier.

[0172] The above synthesized asphalt emulsifier product was subjected to infrared spectrum detection, and the analysis results were (see Figure 2 ): 3429 cm -1 (Peak 1) is the stretching vibration peak of OH, 2870 cm -1 (Peak 2) is the symmetric stretching vibration peak of methylene, 1728 cm -1 (Peak 3) is the C=O stretching vibration absorption peak in the carboxyl and ester groups, 1465 cm -1 (Peak 4) is the asymmetric bending vibration of methylene, 1250 cm -1 (Peak 5) is the stretching vibration absorption peak of Ar-O, 1105 cm -1 (Peak 6) is ROR ' The stretching vibration absorption peak, 678 cm -1 (Peak 7) is the NH out-of-plane bending vibration absorption peak.

[0173] The reaction equation is:

[0174] (17)

[0175] (13)

[0176] Where R1 is -C8H 17 Alkyl; n is 20.

[0177] (18)

[0178] Where R1 is -C8H 17 alkyl.

[0179] (2) Preparation of in-situ cold-regenerated cationic emulsified asphalt:

[0180] Weigh 13.0 g of the cold-in-situ regenerated asphalt emulsifier prepared in this embodiment and add it to 200 g of water, adjust the pH value to 2.5 with industrial hydrochloric acid, and heat it to 60° C. to obtain asphalt emulsifier soap solution. Weigh 300 g of AH-90 asphalt and heat it to 120° C. The hot asphalt and asphalt emulsifier soap solution are passed through a colloid mill to prepare a cationic cold-in-situ regenerated cationic emulsified asphalt.

[0181] The prepared in-situ cold-regenerated cationic emulsified asphalt was tested: the emulsified asphalt was fine and uniform, the area covered with the aggregate was greater than 2 / 3, the charge was cationic, and all performance indicators were good.

[0182] (3) Application of cationic in-situ cold recycled emulsified asphalt:

[0183] Waste asphalt mixture, newly added stone, cement, water, cationic in-situ cold recycled emulsified asphalt, and SBR latex are mixed and spread in a certain ratio. The mixing time can be more than 3 minutes to form a new asphalt pavement that meets road performance requirements.

[0184] Example 3

[0185] This embodiment provides an in-situ cold regeneration asphalt emulsifier and a preparation method and application thereof, comprising the following steps:

[0186] (1) Preparation of in-situ cold recycled asphalt emulsifier:

[0187] 1) Add 148.4 g of N-aminoethylpiperazine and 350 g of isopropanol into a reactor, then add 86.0 g of acrylamide, and stir at 75°C for 3 h to obtain reaction intermediate I.

[0188] 2) In another reactor, add 1086 g OP-20 and 103.9 g maleic anhydride, heat and stir, and react at 95 °C for 3 h to obtain reaction intermediate II.

[0189] 3) Add reaction intermediate II to reaction intermediate I, stir and react at 75°C for 3 h to obtain an in-situ cold recycled asphalt emulsifier.

[0190] The above synthesized asphalt emulsifier product was subjected to infrared spectrum detection, and the analysis results were (see Figure 3 ): 3417 cm -1 (Peak 1) is the stretching vibration peak of OH, 2875 cm -1 (Peak 2) is the symmetric stretching vibration peak of methylene, 1728 cm -1 (Peak 3) is the C=O stretching vibration absorption peak in the carboxyl and ester groups, 1672 cm -1 (Peak 4) is the C=O stretching vibration absorption peak of amide, 1463 cm -1 (Peak 5) is the asymmetric bending vibration of methylene, 1247 cm -1 (Peak 6) is the stretching vibration absorption peak of Ar-O, 1110 cm -1 (Peak 7) is ROR ' The stretching vibration absorption peak, 667 cm -1 (Peak 8) is the NH out-of-plane bending vibration absorption peak.

[0191] The reaction equation is:

[0192] (19)

[0193] (13)

[0194] Where R1 is -C8H 17 Alkyl; n is 20.

[0195] (20)

[0196] Where R1 is -C8H 17 alkyl.

[0197] (2) Preparation of in-situ cold-regenerated cationic emulsified asphalt:

[0198] Weigh 13.0 g of the cold-in-situ regenerated asphalt emulsifier prepared in this embodiment and add it to 200 g of water, adjust the pH value to 2.5 with industrial hydrochloric acid, and heat it to 60° C. to obtain asphalt emulsifier soap solution. Weigh 300 g of AH-90 asphalt and heat it to 120° C. The hot asphalt and asphalt emulsifier soap solution are passed through a colloid mill to prepare a cationic cold-in-situ regenerated cationic emulsified asphalt.

[0199] The prepared in-situ cold-regenerated cationic emulsified asphalt was tested: the emulsified asphalt was fine and uniform, the area covered with the aggregate was greater than 2 / 3, the charge was cationic, and all performance indicators were good.

[0200] (3) Application of cationic in-situ cold recycled emulsified asphalt:

[0201] Waste asphalt mixture, newly added stone, cement, water, cationic in-situ cold recycled emulsified asphalt, and SBR latex are mixed and spread in a certain ratio. The mixing time can be more than 3 minutes to form a new asphalt pavement that meets road performance requirements.

[0202] Example 4

[0203] This embodiment provides an in-situ cold regeneration asphalt emulsifier and a preparation method and application thereof, comprising the following steps:

[0204] (1) Preparation of in-situ cold recycled asphalt emulsifier:

[0205] 1) Add 119.8 g of β-hydroxyethylethylenediamine and 350 g of isopropanol into a reactor, then add 86.0 g of acrylamide, and stir at 75°C for 3 h to obtain reaction intermediate I.

[0206] 2) In another reactor, add 1086 g OP-20 and 103.9 g maleic anhydride, heat and stir, and react at 95 °C for 3 h to obtain reaction intermediate II.

[0207] 3) Add reaction intermediate II to reaction intermediate I, stir and react at 75°C for 3 h to obtain an in-situ cold recycled asphalt emulsifier.

[0208] The reaction equation is:

[0209] (twenty one)

[0210] (13)

[0211] Where R1 is -C8H 17 Alkyl; n is 20.

[0212] (twenty two)

[0213] Where R1 is -C8H 17 alkyl.

[0214] (2) Preparation of in-situ cold-regenerated cationic emulsified asphalt:

[0215] Weigh 12.5 g of the cold-in-situ regenerated asphalt emulsifier prepared in this embodiment and add it to 200 g of water, adjust the pH value to 2.5 with industrial hydrochloric acid, and heat it to 62° C. to obtain asphalt emulsifier soap solution. Weigh 300 g of AH-90 asphalt and heat it to 120° C. The hot asphalt and asphalt emulsifier soap solution are passed through a colloid mill to prepare a cationic cold-in-situ regenerated cationic emulsified asphalt.

[0216] The prepared in-situ cold-regenerated cationic emulsified asphalt was tested: the emulsified asphalt was fine and uniform, the area covered with the aggregate was greater than 2 / 3, the charge was cationic, and all performance indicators were good.

[0217] (3) Application of cationic in-situ cold recycled emulsified asphalt:

[0218] Waste asphalt mixture, newly added stone, cement, water, cationic in-situ cold recycled emulsified asphalt, and SBR latex are mixed and spread in a certain ratio. The mixing time can be more than 3 minutes to form a new asphalt pavement that meets road performance requirements.

[0219] Example 5

[0220] This embodiment provides an in-situ cold regeneration asphalt emulsifier and a preparation method and application thereof, comprising the following steps:

[0221] (1) Preparation of in-situ cold recycled asphalt emulsifier:

[0222] 1) Add 167.9 g of triethylenetetramine and 350 g of isopropanol into a reactor, then add 67.8 g of acrolein, and stir at 75 °C for 3 h to obtain reaction intermediate I.

[0223] 2) In another reactor, add 1086 g OP-20 and 103.9 g maleic anhydride, heat and stir, and react at 95 °C for 3 h to obtain reaction intermediate II.

[0224] 3) Add reaction intermediate II to reaction intermediate I, stir and react at 75°C for 3 h to obtain an in-situ cold recycled asphalt emulsifier.

[0225] The reaction equation is:

[0226] (twenty three)

[0227] (13)

[0228] Where R1 is -C8H 17 Alkyl; n is 20.

[0229] (twenty four)

[0230] Where R1 is -C8H 17 alkyl.

[0231] (2) Preparation of in-situ cold-regenerated cationic emulsified asphalt:

[0232] Weigh 13.0 g of the cold-in-situ regenerated asphalt emulsifier prepared in this embodiment and add it to 200 g of water, adjust the pH value to 2.5 with industrial hydrochloric acid, and heat it to 60° C. to obtain asphalt emulsifier soap solution. Weigh 300 g of AH-90 asphalt and heat it to 120° C. The hot asphalt and asphalt emulsifier soap solution are passed through a colloid mill to prepare a cationic cold-in-situ regenerated cationic emulsified asphalt.

[0233] The prepared in-situ cold-regenerated cationic emulsified asphalt was tested: the emulsified asphalt was fine and uniform, the area covered with the aggregate was greater than 2 / 3, the charge was cationic, and all performance indicators were good.

[0234] (3) Application of cationic in-situ cold recycled emulsified asphalt:

[0235] Waste asphalt mixture, newly added stone, cement, water, cationic in-situ cold recycled emulsified asphalt, and SBR latex are mixed and spread in a certain ratio. The mixing time can be more than 3 minutes to form a new asphalt pavement that meets road performance requirements.

[0236] Comparative Example 1

[0237] In the preparation method of the in-situ cold regenerated asphalt emulsifier in Example 1, "1086 g OP-20" was changed to "426 g OP-5", and other conditions remained unchanged. The synthesized emulsifier could not emulsify asphalt.

[0238] Note: R1 in alkylphenol polyoxyethylene ether (OP-5) is -C8H 17 Alkyl, n is 5. In alkylphenol polyoxyethylene ether (OP-20), R1 is -C8H 17 Alkyl, n is 20.

[0239] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An in-situ cold recycled asphalt emulsifier, characterized in that: The molecular structure formula of the in-situ cold regeneration asphalt emulsifier is: ， Wherein, R1 is an alkyl group having 8 to 12 carbon atoms; n is an integer from 7 to 30; R2 is: ； ； ； ； ； ； ； ； or ； Wherein, m is an integer from 1 to 3; R3 is H or hydroxyethyl.

2. The method for preparing the in-situ cold regenerated asphalt emulsifier according to claim 1, characterized in that: The steps include: 1) Mixing a polyamine compound, isopropanol and a propylene compound to react to obtain a reaction intermediate I, wherein the general structural formula of the reaction intermediate I is: ； Where R2 is: ； ； ； ； ； ； ； ； or ； Wherein, m is an integer from 1 to 3; R3 is H or hydroxyethyl; 2) Mixing alkylphenol polyoxyethylene ether and maleic anhydride to react to obtain a reaction intermediate II, the general structural formula of the reaction intermediate II is: ； Wherein, R1 is an alkyl group having 8 to 12 carbon atoms; n is an integer from 7 to 30; 3) Adding reaction intermediate II to reaction intermediate I, mixing and reacting, and obtaining in-situ cold recycled asphalt emulsifier.

3. The preparation method according to claim 2, characterized in that: The molar ratio of the alkylphenol polyoxyethylene ether, isopropanol, maleic anhydride, polyamine compounds and propylene compounds is 1:3-10:1.00-1.08:1.00-1.30:1.00-1.

35.

4. The preparation method according to claim 2, characterized in that: The alkylphenol polyoxyethylene ether is: ， Wherein, R1 is an alkyl group having 8 to 12 carbon atoms; and n is an integer of 7 to 30.

5. The preparation method according to claim 2, characterized in that: The polyamine compounds are triethylenetetramine, tetraethylenepentamine, diethylenetriamine, ethylenediamine, N-aminoethylpiperazine, and β-hydroxyethylethylenediamine.

6. The preparation method according to claim 2, characterized in that: The acrylic compound is acrylic acid, acrolein or acrylamide.

7. The preparation method according to claim 2, characterized in that: In step 1), during the synthesis of reaction intermediate I, the reaction temperature is 65-82°C and the reaction time is 2-4 h; In step 2), during the synthesis of reaction intermediate II, the reaction temperature is 90-100°C and the reaction time is 2-4 h; In step 3), the reaction temperature is 65-82°C and the reaction time is 2-4 h.

8. The preparation method according to claim 2, characterized in that: The specific steps include: (1) Adding a polyamine compound and isopropanol into a reaction vessel, and then adding a propylene compound. After the addition is complete, stirring and reacting at 65-82° C. for 2-4 h to obtain a reaction intermediate I; (2) Adding alkylphenol polyoxyethylene ether and maleic anhydride into another reaction container, heating and stirring, and reacting at 90-100° C. for 2-4 h to obtain reaction intermediate II; (3) Add reaction intermediate II to reaction intermediate I, stir and react at 65-82°C for 2-4 h to obtain an in-situ cold recycled asphalt emulsifier.

9. A method for preparing a cationic in-situ cold regenerated emulsified asphalt, characterized in that: The following steps are involved: The amount of the in-situ cold regenerated asphalt emulsifier described in claim 1 is 1.5-3.0% of the total mass of the prepared cationic in-situ cold regenerated emulsified asphalt. The in-situ cold regenerated asphalt emulsifier described in claim 1 is added with water to prepare an asphalt emulsifier aqueous solution, and the pH value is adjusted to 2.0-3.0 with industrial hydrochloric acid, and heated to 60.0-70.0°C to obtain asphalt emulsifier soap solution; the heated asphalt and asphalt emulsifier soap solution are emulsified by a colloid mill to prepare a cationic in-situ cold regenerated emulsified asphalt.

10. Application of the cold-in-situ regenerated asphalt emulsifier according to claim 9 as cationic cold-in-situ regenerated emulsified asphalt: waste asphalt mixture, newly added stone, cement, water, cationic cold-in-situ regenerated emulsified asphalt, and SBR latex are mixed and spread according to a proportion to form a new asphalt pavement that meets road performance requirements.

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