Non-sticky wheel strong-bonded reduced-modified emulsified asphalt tack coat and preparation method thereof

Abstract

The application belongs to the technical field of road material, and particularly discloses a non-stick wheel strong bonding reduction type modified emulsified asphalt tack coat and a preparation method thereof.The preparation method of the non-stick wheel strong bonding reduction type modified emulsified asphalt tack coat is as follows: (1) preparing a matrix asphalt: 100 parts of base asphalt, 2-5 parts of thermoplastic elastomer, 1-3 parts of bio-oil, 0.1-0.15 parts of sulfur, 1-3 parts of viscosity reducer and 1-3 parts of regenerant; (2) preparing a modified asphalt: 70-80 parts of the matrix asphalt, 20-30 parts of special asphalt and 1-3 parts of layered double hydroxyl composite metal hydroxide (LDHs); (3) preparing a soap solution: 100 parts of water, 0.4-1 parts of emulsifier and 0.1 part of stabilizer; and (4) preparing the modified emulsified asphalt tack coat: mixing, grinding and emulsifying 50-60 parts of the modified asphalt and 40-50 parts of the soap solution by using a colloid mill.The modified emulsified asphalt tack coat prepared by the application has the characteristics of non-stick wheel, strong bonding, reduction, wide temperature range, high stability, easy activation and strong penetration.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of road materials, and particularly relates to a non-wheel-sticking strong-bonding reduction type modified emulsified asphalt tack coat and a preparation method thereof. BACKGROUND

[0002] The tack coat, as a bonding layer between asphalt layers, has a very important influence on the service performance and service life of the asphalt pavement. However, due to the fact that the ordinary tack coat is often taken away by the wheels of the construction vehicles after being spread, the effective components of the bonding layer material are reduced, the bonding effect is weakened, and the tack coat that is stuck pollutes the surrounding environment. Therefore, the tack coat with the non-wheel-sticking performance attracts much attention of researchers. At present, the non-wheel-sticking tack coat is mainly based on the oily (organic solvent as a diluent) system and the modified emulsified asphalt system. The diluent of the oily system is slow in volatilization, is dangerous and flammable, and has a great influence on the environment, while the emulsified asphalt system has the advantages of normal-temperature construction, energy saving, and low pollution, and has been recognized by the road industry as a low-carbon, environmentally friendly, high-quality and efficient tack coat material.

[0003] At present, the modified asphalt used in the non-wheel-sticking modified emulsified asphalt sold on the market is mainly hard asphalt, hard asphalt / SBS composite modified asphalt, and hard asphalt / resin composite modified asphalt. The modified emulsified asphalt prepared by using these modified asphalts can effectively improve the softening point of the evaporation residue, but if the softening point is improved to be greater than 65 DEG C (in view of the fact that the pavement temperature may exceed 60 DEG C in the summer construction peak season, the softening point of the evaporation residue is 65 DEG C, and the non-wheel-sticking performance is weak, which indicates that the non-wheel-sticking performance of such products at 65 DEG C is weak), the modified agent content is increased, the emulsification difficulty is increased, and the colloid mill is harsh, resulting in that the cost of the non-wheel-sticking modified emulsified asphalt tack coat is too high, and the solid engineering project cannot be accepted. At the same time, these products generally have defects such as poor storage stability and poor bonding performance, and the reduction of the old pavement asphalt is also poor, and the performance of the old pavement asphalt cannot be improved, which seriously weakens the application prospect of the emulsified asphalt system tack coat in different scenes.

[0004] In summary, actively developing the modified emulsified asphalt with the characteristics of non-wheel-sticking, strong bonding, good reduction, wide construction temperature range, good stability, and strong penetration will further improve the application of the emulsified asphalt system in the tack coat market, and vigorously promote the environmental application of the tack coat. SUMMARY

[0005] In view of the above problems of the prior art, the present application aims to provide a non-wheel-sticking strong-bonding reduction type modified emulsified asphalt tack coat and a preparation method thereof, and aims to overcome the problems of the non-wheel-sticking modified emulsified asphalt products on the market, such as insufficient bonding performance, weak reduction performance, narrow construction temperature range, poor permeability, and poor storage stability.

[0006] The inventive concept of the present application is:

[0007] Firstly, a mother asphalt is prepared by adding a thermoplastic elastomer, a bio-oil, sulfur, a viscosity reducer and a regenerant into a high-grade 70# or 90# base asphalt. The bio-oil acts as a compatibilizer to swell the thermoplastic elastomer, so as to improve the compatibility of the thermoplastic elastomer with the base asphalt; the sulfur acts as a stabilizer to ensure good storage stability of the prepared mother asphalt; the viscosity reducer is added to reduce the viscosity of the modified asphalt, on the one hand, to reduce the preparation temperature of the subsequent modified asphalt, and on the other hand, to reduce the difficulty of emulsification of the modified asphalt, so as to improve the emulsification efficiency; the regenerant is added to reduce the aged asphalt of the old road surface, so as to promote the fusion of the new and old asphalts, and to restore the aged asphalt of the old road surface.

[0008] Secondly, a modified asphalt is prepared by adding a special asphalt and a layered double hydroxide (LDH) into the prepared mother asphalt. The special asphalt is added to adjust the high and low temperature performance and the bonding performance of the modified asphalt, and to give the modified asphalt a non-stick wheel performance; the layered double hydroxide (LDH) is added to enhance the anti-aging performance of the modified asphalt, to maintain the balance of the four components (saturated hydrocarbons, aromatic hydrocarbons, resins and asphaltenes) in the modified asphalt, to improve the bonding performance of the modified emulsified asphalt, and to improve the softening point index.

[0009] Finally, a soap solution is prepared, and the soap solution and the modified asphalt are mixed and emulsified by a colloid mill, so as to obtain a non-stick wheel high-bonding reduced modified emulsified asphalt tack coat.

[0010] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0011] A non-stick wheel strong-bonding reduced modified emulsified asphalt tack coat is prepared from 50-60 parts of modified asphalt and 40-50 parts of a soap solution; the modified asphalt is made from 70-80 parts of a mother asphalt, 20-30 parts of a special asphalt and 1-3 parts of LDHs; the mother asphalt is made from 100 parts of a base asphalt, 2-5 parts of a thermoplastic elastomer, 1-3 parts of a bio-oil, 0.10-0.15 parts of sulfur, 1-3 parts of a viscosity reducer and 1-3 parts of a regenerant; and the soap solution is made from 0.4-1 parts of an emulsifier, 0.1 parts of a stabilizer and 100 parts of water.

[0012] A preparation method of a non-stick wheel strong-bonding reduced modified emulsified asphalt tack coat comprises the following steps:

[0013] (1) Preparation of the matrix asphalt: 100 parts of base asphalt, 2-5 parts of thermoplastic elastomer, 1-3 parts of bio-oil, 0.10-0.15 parts of sulfur, 1-3 parts of viscosity reducer, and 1-3 parts of rejuvenator are weighed. The 100 parts of base asphalt is heated to 170°C, then 2-5 parts of thermoplastic elastomer and 1-3 parts of bio-oil are added to the base asphalt, which is immediately heated to 180-185°C, sheared at 3000 r / min for 30 min, stirred at 300 r / min for 1 h by using a stirrer, 0.10-0.15 parts of sulfur is added, stirred for another 1 h, and finally 1-3 parts of viscosity reducer and 1-3 parts of rejuvenator are added, stirred for 1 h, to obtain the matrix asphalt.

[0014] (2) Preparation of the modified asphalt: 70-80 parts of the matrix asphalt prepared in step (1), 20-30 parts of special asphalt, and 1-3 parts of layered double hydroxide (LDHs) are weighed. The 70-80 parts of the matrix asphalt prepared in step (1) is heated to 180-185°C, 20-30 parts of special asphalt is added and stirred at 400 r / min for 1 h, and then 1-3 parts of LDHs is added and stirred for another 1 h, to obtain the modified asphalt. (If the special asphalt is hard asphalt, 20-30 parts of hard asphalt is first added to the 70-80 parts of the matrix asphalt, which is heated to 180-185°C, stirred at 400 r / min for 1 h, and then 1-3 parts of LDHs is added and stirred for another 1 h, to obtain the modified asphalt.)

[0015] (3) Preparation of the soap solution: 100 parts of water, 0.4-1 parts of emulsifier, and 0.1 parts of stabilizer are weighed. The 0.4-1 parts of emulsifier and the 0.1 parts of stabilizer are respectively added to 100 parts of water at 50-60°C, stirred uniformly, and then the pH is adjusted to 1.9-2.1 by using concentrated hydrochloric acid, to obtain the soap solution.

[0016] (4) Preparation of the modified emulsified asphalt tack coat: 50-60 parts of the modified asphalt prepared in step (2) is heated to 150-165°C, and 40-50 parts of the soap solution prepared in step (3) is heated to 50-60°C. The modified asphalt and the soap solution that reach the heating temperature are sheared at high speed (2800 r / min) by using a colloid mill for 1-1.5 min, to obtain the modified emulsified asphalt tack coat.

[0017] Further, the base asphalt in step (1) is 70# or 90# base asphalt.

[0018] Further, the thermoplastic elastomer in step (1) is any one of styrene-butadiene-styrene block copolymer (SBS), polystyrene butadiene copolymer (SBR), hydrogenated styrene-butadiene block copolymer (SEBS), styrene-ethylene-propylene-styrene block copolymer (SEPS), styrene-isoprene-styrene triblock copolymer (SIS) and hydrogenated styrene-isoprene-styrene triblock copolymer (hydrogenated SIS) or a combination of two or more thereof.

[0019] Further, the bio-oil in step (1) is any one of rapeseed oil, corn straw biomass heavy oil, pig manure biomass heavy oil and soybean oil fatty acid or a combination of two or more thereof, preferably soybean oil fatty acid.

[0020] Further, the sulfur in step (1) is sulfur tablet or sulfur powder, wherein the content of elemental sulfur in the sulfur tablet or sulfur powder is >99.9%.

[0021] Further, the viscosity reducer in step (1) is silicone resin emulsion, and the viscosity of the silicone resin emulsion is 100-300 mPa·s.

[0022] Further, the kinematic viscosity (40°C) of the regenerant in step (1) is 40-60 mm 2 / s, the aromatic content is >30%, and preferably the regenerant is any one of paraffin oil, aromatic extract, naphthenic oil, triglyceride, fatty acid and tall oil or a combination of two or more thereof.

[0023] Further, the special asphalt in step (2) is any one of 10# hard asphalt, 30# hard asphalt, rock asphalt, lake asphalt and sulfonated asphalt or a combination of two or more thereof.

[0024] Further, the magnesium to aluminum ratio (molar ratio) in the layered double hydroxide (LDHs) in step (2) is n(magnesium):n(aluminum)=2:1 or 3:1.

[0025] Further, the emulsifier in step (3) is a fast-cracking type emulsifier, including alkyl amine emulsifiers (such as alkyl propylene diamine, Duomeen T, tallow tetramine, etc.), alkyl quaternary ammonium salt emulsifiers (such as LT-CK1, octadecyl trimethyl ammonium chloride, 1,3-propanediamine-N,N,N,N',N'-pentamethyl-N'-octadecyl dichloride, etc.) and amido polyamine emulsifiers (such as AA-63D, N-aminoethyl amide, alkyl amido polyamine, etc.).

[0026] Further, the stabilizer in the step (3) is an inorganic stabilizer and / or an organic stabilizer, the inorganic stabilizer is any one or a combination of two or more of calcium chloride, potassium chloride, sodium chloride, magnesium chloride, sodium carbonate, sodium bicarbonate, hydrochloric acid and acetic acid, and the organic stabilizer is any one or a combination of two or more of carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose and polyvinyl alcohol.

[0027] The non-sticky wheel strong-bonding reduced modified emulsified asphalt tack coat oil obtained by the preparation method can be directly sprayed or diluted with 1.1-1.3 times water and then sprayed on the road surface.

[0028] Compared with the prior art, the application has the following advantages and beneficial effects:

[0029] (1) Strong bonding. The application adds a viscosity reducer, which reduces the emulsification difficulty of the modified asphalt, provides space for adding a modifier (special asphalt) with excellent bonding in the modified asphalt, and effectively improves the bonding strength and non-sticky wheel performance of the modified emulsified asphalt tack coat oil.

[0030] (2) Strong reduction. The biological oil and the regenerant in the application produce a high-efficiency synergistic effect, that is, the biological oil can effectively promote the swelling and development of the thermoplastic elastomer, providing conditions for the dispersion and "migration" of the regenerant, and the uniformly distributed regenerant can fully reduce the aged asphalt of the old road surface and promote the fusion of the new and old asphalts.

[0031] (3) Significant non-sticky wheel effect. The layered double hydroxide (LDHs) in the application effectively inhibits the volatilization of the light components in the asphalt, fully ensuring the bonding strength and non-sticky wheel effect. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 Appearance effect diagram of the non-sticky wheel modified emulsified asphalt tack coat oil prepared in step (4) of Example 1;

[0033] Figure 2 Appearance effect diagram of the non-sticky wheel modified emulsified asphalt tack coat oil prepared in step (4) of Example 2;

[0034] Figure 3 Appearance effect diagram of the non-sticky wheel modified emulsified asphalt tack coat oil prepared in step (4) of Example 3. DETAILED DESCRIPTION

[0035] In order to better understand the application, the following embodiments are further illustrated to clarify the content of the application, but the content claimed in the claims of the application is not limited to the following embodiments.

[0036] In the following examples, the raw materials used: Qingdao 70# matrix asphalt was purchased from Zibo Qi Culture Engineering Co., Ltd.; styrene-butadiene-styrene block copolymer SBS (YH-791-1301, linear, S / B = 30 / 70) was purchased from Jinjuyu Chemical Co., Ltd. in Jinan; polystyrene butadiene copolymer SBR powder (white powder, particle size 10-80 mesh, molecular weight 200-300 thousand) was purchased from Shandong Qiaolong Environmental Protection Technology Co., Ltd.; hydrogenated styrene-butadiene block copolymer SEBS (YH-501, fine particles, styrene content 33%) was purchased from Guangzhou Baiteng New Material Technology Co., Ltd.; styrene-ethylene-propylene-styrene block copolymer SEPS (melt index 9-12 g / 10 min, styrene content 30%) was purchased from Shanghai Baisi Industry Co., Ltd.; soybean oil fatty acid (pale yellow oily liquid, content 99%, density 0.89 g / cm 2 ) purchased from Jinan Xun Dalili Chemical Co., Ltd.; sulfur tablets (pale yellow, elemental sulfur content > 99.9%) purchased from Henan Leimei Chemical Product Co., Ltd.; silicone resin emulsion (milky white liquid, viscosity 100-300 mPa·s) purchased from Hubei Longsheng Sihai New Material Co., Ltd.; naphthenic oil (40℃ kinematic viscosity 40-60 mm 2 / s, aromatic content > 30%) purchased from Maoming Runhua Petroleum Chemical Co., Ltd.; 10# hard asphalt purchased from Shanghai Wanzhao Fine Chemical Co., Ltd.; rock asphalt (black solid, penetration 0-4 / 0.1 mm, softening point > 100℃, ductility (5℃) 0-4 cm) purchased from Qingdao Meilian Energy Co., Ltd.; sulfonated asphalt (black powder, sulfur content ≤0.3%, moisture content ≤3%, volatile matter 58-68%, resin content ≥18%, coking value ≥50%) purchased from Hebei Xinxin Trade Co., Ltd.; layered double hydroxide (LDHs), where n(magnesium):n(aluminum) = 2:1, purchased from Beijing Taiklaier Chemical Co., Ltd.; emulsifier AA-63D purchased from Meite Weike; emulsifier Duomeen T purchased from Shanghai Kaixin Chemical Co., Ltd.; emulsifier LT-CK1 purchased from Xinxiang Longteng Road Material Co., Ltd.; CaCl2(anhydrous, white spherical particles, particle size 50, density 2.15 g / cm 3 ) purchased from Jinan Jinyongshuo Chemical Co., Ltd.; carboxymethyl cellulose (high viscosity) purchased from Taiyuan Hongxinghang Chemical Product Co., Ltd.; polyvinyl alcohol powder (white powder, particle size 80 mesh, purity > 98%, alcoholysis degree > 98%, ash content < 0.5%) purchased from Shanxi Sanyi Shengtai New Material Technology Co., Ltd.; concentrated hydrochloric acid (mass percentage content of active ingredient HCl is 36%) purchased from Shijiazhuang Yanqifa Chemical Co., Ltd.

[0037] The following examples, the use of equipment: shear machine JRJ300-S digital display shear machine from Shanghai YueCai Electronics Technology Co., Ltd., blender (FS-400D) from Hangzhou Qiwei Instruments Co., Ltd., colloid mill (MD-1) from Jiaxing Mid Machinery Co., Ltd., pH meter (Shanghai Rayleigh, PHS-25) from Shanghai Rayleigh Instruments Co., Ltd.

[0038] In the following examples, "parts" refers to mass parts.

[0039] Example 1: A preparation method of a non-stick wheel strong bonding reduced modified emulsified asphalt tack coat, comprising the following steps: (in this example, every "part" refers to 50g)

[0040] (1) Preparation of base asphalt: 100 parts of Qingdao 70# base asphalt is heated to 170℃, then 3 parts of styrene-butadiene-styrene block copolymer (SBS) and 1 part of soybean oil fatty acid are added, immediately heated to 180℃, sheared at 3000r / min for 30min, then stirred at 300r / min for 1h using a blender, 0.15 parts of sulfur tablet is added and continue to stir for 1h, finally 2 parts of silicone resin emulsion and 2 parts of naphthenic oil are added and continue to stir for 1h, thus the base asphalt is prepared.

[0041] (2) Preparation of modified asphalt: 27 parts of 10# hard asphalt is added to 70 parts of the base asphalt prepared in step (1), heated to 180℃, stirred at 400r / min for 1h, then 3 parts of layered double hydroxide (LDHs) is added and continue to stir for 1h, thus the modified asphalt is prepared.

[0042] (3) Preparation of soap solution: 0.5 parts of emulsifier AA-63D and 0.1 parts of carboxymethyl cellulose are added to 100 parts of tap water (comply with GB5749-85 standard) at about 55℃ and stirred uniformly, then 36% concentrated hydrochloric acid is used to adjust the pH to 1.9-2.1, thus the soap solution is prepared and ready for use.

[0043] (4) Preparation of modified emulsified asphalt tack coat: the colloid mill is preheated with 70℃ water, 55℃ 50 parts of the soap solution prepared in step (3) is poured into the colloid mill and circulated for 10s, then 155℃ 50 parts of the modified asphalt prepared in step (2) is added, emulsified at high speed, the speed is 2800r / min and the shearing time is 1.5min, thus the non-stick wheel strong bonding reduced modified emulsified asphalt tack coat is prepared (the appearance is as shown in Figure 1 ).

[0044] Example 2: A preparation method of a non-stick wheel strong bonding reduced modified emulsified asphalt tack coat, comprising the following steps: (in this example, every "part" refers to 80g)

[0045] (1) Preparation of the base asphalt: 100 parts of Qingdao 70# base asphalt was heated to 170°C, then 3 parts of hydrogenated styrene-butadiene block copolymer (SEBS) and 1 part of soybean oil fatty acid were added into the base asphalt, immediately heated to 180°C, sheared at 3000 r / min for 30 min, then stirred at 300 r / min for 1 h by using a stirrer, 0.15 parts of sulfur tablet was added and stirred for another 1 h, finally 2 parts of silicone resin emulsion and 1 part of naphthenic oil were added and stirred for another 1 h, thus the base asphalt was prepared.

[0046] (2) Preparation of the modified asphalt: 70 parts of the base asphalt prepared in step (1) was kept at 180°C, 28 parts of rock asphalt was added and stirred at 400 r / min for 1 h, then 2 parts of LDHs was added and stirred for another 1 h, thus the modified asphalt was prepared.

[0047] (3) Preparation of the soap solution: 0.45 parts of emulsifier Duomeen T, 0.05 parts of CaCl2 and 0.05 parts of polyvinyl alcohol were added into 100 parts of tap water (meeting the standard of GB5749-85) at about 55°C and stirred uniformly, then the pH was adjusted to 1.9-2.1 by using 36% hydrochloric acid, thus the soap solution was prepared and ready for use.

[0048] (4) Preparation of the modified emulsified asphalt tack coat: the colloidal mill was preheated by using water at 70°C, 50 parts of the soap solution prepared in step (3) at 55°C was poured into the colloidal mill and circulated for 10 s, then 50 parts of the modified asphalt prepared in step (2) at 155°C was added and emulsified at high speed, the rotating speed was 2800 r / min and the shearing time was 1.5 min, thus the non-stick wheel strong bonding reduced type modified emulsified asphalt tack coat was prepared (the appearance was as shown in Fig. 1). Figure 2

[0049] Example 3: A method for preparing a non-stick wheel strong bonding reduced type modified emulsified asphalt tack coat, comprising the following steps: (in this example, “parts” means 100 g)

[0050] (1) Preparation of the base asphalt: 100 parts of Qingdao 70# base asphalt was heated to 170°C, then 3 parts of hydrogenated styrene-butadiene block copolymer (SEBS) and 1 part of soybean oil fatty acid were added into the base asphalt, immediately heated to 180°C, sheared at 3000 r / min for 30 min, then stirred at 300 r / min for 1 h by using a stirrer, 0.15 parts of sulfur tablet was added and stirred for another 1 h, finally 2 parts of silicone resin emulsion and 1 part of naphthenic oil were added and stirred for another 1 h, thus the base asphalt was prepared.

[0051] ​(2) Modified asphalt preparation: 70 parts of the base asphalt prepared in step (1) was heated to 180°C, 29 parts of sulfonated asphalt was added, stirred at 400 r / min for 1 h, then 1.0 part of LDHs was added, and stirred for another 1 h, to obtain the modified asphalt.

[0052] (3) Preparation of soap solution: 0.45 parts of emulsifier LT-CK1, 0.04 parts of CaCl2 and 0.06 parts of polyvinyl alcohol were added into 100 parts of tap water (meeting the standard of GB5749-85) at about 55°C, and stirred uniformly, then 36% concentrated hydrochloric acid was used to adjust the pH to 1.9-2.1, to obtain the soap solution, ready for use.

[0053] (4) Preparation of modified emulsified asphalt tack coat: the colloidal mill was preheated with water at 70°C, 45 parts of the soap solution prepared in step (3) at 55°C was poured into the colloidal mill and circulated for 10 s, then 55 parts of the modified asphalt prepared in step (2) at 155°C was added, and emulsified at high speed with a rotation speed of 2800 r / min and a shearing time of 1.5 min, to obtain the non-sticky wheel strong bonding reduced modified emulsified asphalt tack coat (appearance as shown in Figure 3

[0054] Comparative Example 1

[0055] The same as Example 1, except that in the preparation of the base asphalt in step (1), no soybean oil fatty acid was added, i.e. step (1) was: 100 parts of Qingdao 70# base asphalt was heated to 170°C, then 3 parts of styrene-butadiene-styrene block copolymer (SBS) was added into the base asphalt, immediately heated to 180°C, sheared at 3000 r / min for 30 min, then stirred with a stirrer at 300 r / min for 1 h, 0.15 parts of sulfur tablet was added, and stirred for another 1 h, finally 2 parts of silicone resin emulsion was added, and stirred for another 1 h, to obtain the base asphalt.

[0056] Comparative Example 2

[0057] The same as Example 1, except that in the preparation of the base asphalt in step (1), no naphthenic oil was added, i.e. step (1) was: 100 parts of Qingdao 70# base asphalt was heated to 170°C, then 3 parts of styrene-butadiene-styrene block copolymer (SBS) and 1 part of soybean oil fatty acid was added into the base asphalt, immediately heated to 180°C, sheared at 3000 r / min for 30 min, then stirred with a stirrer at 300 r / min for 1 h, 0.15 parts of sulfur tablet was added, and stirred for another 1 h, finally 2 parts of silicone resin emulsion was added, and stirred for another 1 h, to obtain the base asphalt.

[0058] Comparative Example 3

[0059] ​The same as example 1, except that the only difference is that no layered double hydroxide (LDHs) is added in the modified asphalt preparation process in step (2), i.e., step (2) is: 27 parts of 10# hard asphalt is added into 70 parts of the base asphalt prepared in step (1), which is heated to 180℃ and stirred at 400 r / min for 1 h to prepare the modified asphalt.

[0060] Effect Example 1: In order to compare the performance of the non-stick wheel strong bonding reduced modified emulsified asphalt tack coat oil prepared by the present application, the performance parameters of the emulsified asphalt tack coat oil (model PC-3, cationic spraying type) commonly used in the prior art are used as a comparative test, and the test results are shown in Table 1.

[0061] Table 1 shows the various technical indicators of the tack coat oils prepared in examples 1-3, comparative examples 1-3 and the commercially available product PC-3 tack coat oil.

[0062] Table 1

[0063]

[0064] From the experimental results, it can be seen that the non-stick wheel strong bonding reduced modified emulsified asphalt tack coat oil prepared in each embodiment of the present application has good non-stick wheel effect (high softening point), high tensile strength, good bonding property, wide construction temperature range (high temperature 45℃ and low temperature 5℃, similar demulsification time), good storage stability, and excellent penetration performance. By comparing example 1 with comparative examples 1 and 2, the results show that the addition of neither bio-oil nor regenerant can cause the performance of the modified emulsified asphalt tack coat oil to decrease, and the addition of both can improve the performance. By comparing with comparative example 3, the tensile strength and softening point of the modified emulsified asphalt tack coat oil without the addition of layered double hydroxide (LDHs) are significantly decreased, and the performance is close to that of the commercially available product PC-3 tack coat oil, so it can be known that LDHs plays a key role in improving the bonding property and non-stick wheel characteristics of the modified emulsified asphalt tack coat oil.

[0065] Effect Example 2: In order to test the reduction performance of the non-stick wheel strong bonding reduced modified emulsified asphalt tack coat oil, the inventors also selected the modified emulsified asphalt tack coat oil prepared in example 1 and the modified emulsified asphalt tack coat oils prepared in comparative examples 1, 2 and 3 and the commercially available product PC-3 tack coat oil for test verification. Three-year-old old asphalt back material is mixed with the emulsified asphalt tack coat oil at a mass ratio of 2:1, and the changes in penetration, softening point and ductility of the mixture are tested, and the test results are shown in Table 2.

[0066] Table 2 Performance index changes of old asphalt back material

[0067]

[0068] The test results show that adding the non-stick wheel strong bonding reduced modified emulsified asphalt tack coat oil prepared in Example 1 can obviously improve the performance of old asphalt, and has a good performance reduction effect on old asphalt, which is reflected in the increase of penetration, the decrease of softening point, and the increase of ductility; compared with the tack coat oils of Comparative Example 1 and Comparative Example 2, it fully shows that the bio-oil and the regenerant in the application produce a high efficient synergistic effect, that is, the bio-oil can effectively promote the swelling and development of the thermoplastic elastomer, and provide conditions for the dispersion and "wandering" of the regenerant, and the uniformly distributed regenerant can fully reduce the aged asphalt of the regenerated old road surface, and promote the fusion of new and old asphalt; compared with the tack coat oil of Comparative Example 3 and the commercially available product PC-3 tack coat oil, it also shows that the non-stick wheel strong bonding reduced modified emulsified asphalt tack coat oil product prepared in Example 1 has more excellent reduction performance.

Claims

1. A non-sticky wheel strong bond reduced modified emulsified asphalt tack coat oil characterized by, The modified asphalt is prepared from 70-80 parts of base asphalt, 20-30 parts of special asphalt and 1-3 parts of layered double hydroxyl composite metal hydroxide; the base asphalt is prepared from 100 parts of base asphalt, 2-5 parts of thermoplastic elastomer, 1-3 parts of bio-oil, 0.10-0.15 parts of sulfur, 1-3 parts of viscosity reducer and 1-3 parts of regenerant; the soap solution is prepared from 0.4-1 parts of emulsifier, 0.1 parts of stabilizer and 100 parts of water; The layered double hydroxyl composite metal hydroxide has a mass ratio of magnesium to aluminum of 2:1 or 3:1; The base asphalt is 70# or 90# base asphalt; The bio-oil is any one or a combination of two or more of rapeseed oil, corn straw biomass heavy oil, pig manure biomass heavy oil and soybean oil fatty acid; Technical index of the regenerant: 40℃ kinematic viscosity is 40~60mm 2 / s, is any one or a combination of two or more of paraffin oil, aromatic extract, naphthenic oil, triglyceride, fatty acid and tall oil.

2. The non-sticky wheel strong-bond reduced-modified emulsified asphalt tack coat oil according to claim 1, characterized by, The thermoplastic elastomer is any one or a combination of two or more of styrene-butadiene-styrene block copolymer, polystyrene butadiene copolymer, hydrogenated styrene-butadiene block copolymer, styrene-ethylene-propylene-styrene block copolymer, styrene-isoprene-styrene triblock copolymer and hydrogenated styrene-isoprene-styrene triblock copolymer; The viscosity of the silicone resin emulsion is 100-300 mPa.s; The technical index of the regenerant is that the aromatic content is greater than 30%.

3. The non-sticky wheel strong-bond reduced-modified emulsified asphalt tack coat oil according to claim 1, characterized by, The special asphalt is any one or a combination of two or more of 10# hard asphalt, 30# hard asphalt, rock asphalt, lake asphalt and sulfonated asphalt; The emulsifier is a fast-cracking type emulsifier; The stabilizer is an inorganic stabilizer and / or an organic stabilizer.

4. The non-sticky wheel strong-bond reduced-modified emulsified asphalt tack coat oil according to claim 3, characterized by, The emulsifier is any one of alkyl amine emulsifier, alkyl quaternary ammonium salt emulsifier or amido polyamine emulsifier; The inorganic stabilizer is any one or a combination of two or more of calcium chloride, potassium chloride, sodium chloride, magnesium chloride, sodium carbonate, sodium bicarbonate, hydrochloric acid and acetic acid, and the organic stabilizer is any one or a combination of two or more of carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose and polyvinyl alcohol.

5. The non-sticky wheel strong-bond reduced-modified emulsified asphalt tack coat oil according to claim 4, characterized by, The emulsifier is any one of alkyl propylene diamine, beef tallow tetramine, LT-CK1, octadecyl trimethyl ammonium chloride, 1,3-propylene diamine-N,N,N,N',N'-pentamethyl-N'-octadecyl dichloride, AA-63D, N-aminoethyl amide and alkyl amido polyamine.

6. The non-sticky wheel strong-bond reduced-modification emulsified asphalt tack coat oil according to claim 5, characterized by, The emulsifier is Duomeen T.

7. The non-sticky wheel strong-bond reduced-modified emulsified asphalt tack coat of any one of claims 1-6, wherein, The preparation method comprises the following steps: (1) base asphalt preparation: heating the base asphalt, then adding the thermoplastic elastomer and bio-oil, immediately heating to 180-185℃, shearing and stirring, then adding 0.10-0.15 parts of sulfur, stirring again, and finally adding the viscosity reducer and regenerant, and stirring to obtain the base asphalt; (2) modified asphalt preparation: mixing the base asphalt prepared in step (1), special asphalt and layered double hydroxyl composite metal hydroxide at 180-185℃, and stirring to obtain the modified asphalt; (3) Preparation of soap solution: emulsifier and stabilizer are added into water at 50-60℃, and stirred uniformly, then pH is adjusted to 1.9-2.1 by concentrated hydrochloric acid, and the soap solution is prepared; (4) Preparation of modified emulsified asphalt tack coat: the modified asphalt prepared in step (2) is heated to 150-165℃, the soap solution prepared in step (3) is heated to 50-60℃, and the modified asphalt and the soap solution reaching the heating temperature are emulsified together by high-speed shearing of colloid mill for 1-1.5 min, and the modified emulsified asphalt tack coat is prepared.

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