Vegetable-oil-based asphalt repair material and preparation method therefor and use thereof, and recycled asphalt

Abstract

Provided in the present invention are a vegetable-oil-based asphalt repair material and a preparation method therefor and the use thereof, and recycled asphalt. The vegetable-oil-based asphalt repair material comprises the following components in parts by mass: 70-90 parts of vegetable oil, 5-10 parts of deoiled asphalt, 5-10 parts of a surfactant, 5-10 parts of a penetrant, 5-10 parts of a tackifier, 5-10 parts of an anti-aging agent, and 5-10 parts of an anti-stripping agent. The vegetable-oil-based asphalt repair material provided by the present invention has the advantages of good adhesiveness, a high bonding strength and a high content of aromatics, and can restore and improve the performance of aged asphalt, improve the durability of recycled asphalt and also prolong the service life of the recycled asphalt.

Description

A plant oil-based bitumen repair material, its preparation method and application, and recycled bitumen. Technical Field

[0001] This invention relates to the field of road engineering materials technology, and in particular to a plant oil-based asphalt repair material, its preparation method and application, and recycled asphalt. Background Technology

[0002] In today's society, which increasingly emphasizes sustainable development, the road construction industry is constantly exploring and practicing green and environmentally friendly construction methods. Among these efforts, the development of high-performance plant-oil-based asphalt repair materials has become an important research topic in the industry. As an environmentally friendly material, the research and application of plant-oil-based asphalt repair materials can help solve the problem of treating aged asphalt in traditional road construction.

[0003] In traditional road maintenance, aged asphalt is often discarded as waste, which not only wastes valuable resources but also puts pressure on the environment. However, plant oil-based asphalt repair materials can recycle aged asphalt, transforming it into recycled asphalt, thus achieving effective utilization of aged asphalt and reducing resource waste. By effectively improving the reuse efficiency of aged asphalt, the environmental impact of road construction can be reduced, promoting resource recycling, which is of great significance for driving the green transformation of the road construction industry.

[0004] However, the performance of recycled asphalt differs from that of virgin asphalt, and it fails to meet the corresponding quality standards in some projects. Therefore, there is an urgent need to develop a plant-oil-based asphalt repair material that can both regenerate aged asphalt and improve its performance. This would promote the widespread adoption of aged asphalt recycling technology, achieve energy conservation and emission reduction, utilize solid waste, and meet the requirements for green and low-carbon road construction. Summary of the Invention

[0005] The technical problem this invention aims to solve is to overcome the inability of traditional asphalt repair materials to simultaneously address the issues of aging asphalt regeneration and improving the performance of regenerated asphalt, such as enhancing its durability and extending its service life. This invention provides a plant oil-based asphalt repair material, its preparation method, its application, and the regenerated asphalt itself. The preparation method of the plant oil-based asphalt repair material provided by this invention yields a plant oil-based asphalt repair material with good adhesion, high bonding strength, and high aromatic content. This material can both restore and improve the performance of aging asphalt and enhance the durability and service life of regenerated asphalt.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This invention provides a plant oil-based asphalt repair material, which comprises the following components in parts by weight: 70-90 parts of plant oil, 5-10 parts of deoiled asphalt, 5-10 parts of surfactant, 5-10 parts of penetrant, 5-10 parts of tackifier, 5-10 parts of anti-aging agent, and 5-10 parts of anti-stripping agent.

[0008] In a preferred embodiment, the vegetable oil-based bitumen repair material comprises the following components in parts by weight: 90 parts vegetable oil, 5 parts deoiled bitumen, 5 parts surfactant, 5 parts penetrant, 5 parts tackifier, 5 parts anti-aging agent, and 5 parts anti-stripping agent.

[0009] In a preferred embodiment, the vegetable oil-based asphalt repair material comprises the following components in parts by weight: 90 parts vegetable oil, 10 parts deoiled asphalt, 10 parts surfactant, 10 parts penetrant, 10 parts tackifier, 10 parts anti-aging agent, and 10 parts anti-stripping agent.

[0010] In a preferred embodiment, the vegetable oil-based asphalt repair material comprises the following components in parts by weight: 70 parts vegetable oil, 5 parts deoiled asphalt, 5 parts surfactant, 5 parts penetrant, 5 parts tackifier, 5 parts anti-aging agent, and 5 parts anti-stripping agent.

[0011] In a preferred embodiment, the vegetable oil-based asphalt repair material comprises the following components in parts by weight: 70 parts vegetable oil, 10 parts deoiled asphalt, 10 parts surfactant, 10 parts penetrant, 10 parts tackifier, 10 parts anti-aging agent, and 10 parts anti-stripping agent.

[0012] In a preferred embodiment, the vegetable oil-based asphalt repair material comprises the following components in parts by weight: 80 parts vegetable oil, 5 parts deoiled asphalt, 5 parts surfactant, 5 parts penetrant, 5 parts tackifier, 5 parts anti-aging agent, and 5 parts anti-stripping agent.

[0013] In a preferred embodiment, the vegetable oil-based asphalt repair material comprises the following components in parts by weight: 80 parts vegetable oil, 10 parts deoiled asphalt, 10 parts surfactant, 10 parts penetrant, 10 parts tackifier, 10 parts anti-aging agent, and 10 parts anti-stripping agent.

[0014] In this invention, the vegetable oil is preferably expired edible vegetable oil, such as expired Fulinmen non-GMO grade 1 soybean oil.

[0015] In this invention, the deoiled bitumen is preferably a natural resin-type deoiled bitumen.

[0016] In this invention, the surfactant is preferably sodium dodecyl sulfate.

[0017] In this invention, the penetrant is preferably kerosene.

[0018] In this invention, the thickener is preferably a petroleum resin.

[0019] In this invention, the anti-aging agent is preferably an aromatic amine antioxidant, more preferably one of diphenyldiamide, N-benzyl-2-naphthylamine and N-isobutyl-2-naphthylamine, for example: diphenyldiamide.

[0020] In this invention, the anti-stripping agent is preferably slaked lime.

[0021] In a preferred embodiment, the vegetable oil is expired edible vegetable oil; the deoiled asphalt is natural resin-type deoiled asphalt; the surfactant is sodium dodecyl sulfate; the penetrant is kerosene; the thickener is petroleum resin; the anti-aging agent is diphenyldicarboxylate; and the anti-stripping agent is slaked lime.

[0022] In a more preferred embodiment, the vegetable oil-based asphalt repair material comprises the following components in parts by weight: 90 parts of expired edible vegetable oil, 5 parts of natural resin-type deoiled asphalt, 5 parts of sodium dodecyl sulfate, 5 parts of kerosene, 5 parts of petroleum resin, 5 parts of diphenyl dicarboxylate, and 5 parts of quicklime.

[0023] In a more preferred embodiment, the vegetable oil-based asphalt repair material comprises the following components in parts by weight: 90 parts of expired edible vegetable oil, 10 parts of natural resin-type deoiled asphalt, 10 parts of sodium dodecyl sulfate, 10 parts of kerosene, 10 parts of petroleum resin, 10 parts of diphenyl dicarboxylate, and 10 parts of quicklime.

[0024] In a more preferred embodiment, the vegetable oil-based asphalt repair material comprises the following components in parts by weight: 70 parts of expired edible vegetable oil, 5 parts of natural resin-type deoiled asphalt, 5 parts of sodium dodecyl sulfate, 5 parts of kerosene, 5 parts of petroleum resin, 5 parts of diphenyl dicarboxylate, and 5 parts of quicklime.

[0025] In a more preferred embodiment, the vegetable oil-based asphalt repair material comprises the following components in parts by weight: 70 parts of expired edible vegetable oil, 10 parts of natural resin-type deoiled asphalt, 10 parts of sodium dodecyl sulfate, 10 parts of kerosene, 10 parts of petroleum resin, 10 parts of diphenyl dicarboxylate, and 10 parts of quicklime.

[0026] In a more preferred embodiment, the vegetable oil-based asphalt repair material comprises the following components in parts by weight: 80 parts of expired edible vegetable oil, 5 parts of natural resin-type deoiled asphalt, 5 parts of sodium dodecyl sulfate, 5 parts of kerosene, 5 parts of petroleum resin, 5 parts of diphenyl dicarboxylate, and 5 parts of quicklime.

[0027] In a more preferred embodiment, the vegetable oil-based asphalt repair material comprises the following components in parts by weight: 80 parts of expired edible vegetable oil, 10 parts of natural resin-type deoiled asphalt, 10 parts of sodium dodecyl sulfate, 10 parts of kerosene, 10 parts of petroleum resin, 10 parts of diphenyl dicarboxylate, and 10 parts of quicklime.

[0028] In this invention, the word "comprising" in the above embodiments can be replaced with "composed of".

[0029] This invention provides a method for preparing a plant oil-based asphalt remediation material, comprising the following steps:

[0030] S1: Add a penetrant to the vegetable oil to obtain mixture A;

[0031] S2: Add deoiled bitumen to mixture A to obtain mixture B;

[0032] S3: Add a thickener to mixture B, followed by a surfactant, an anti-aging agent, and an anti-stripping agent to obtain a vegetable oil-based asphalt repair material.

[0033] In this invention, in step S1, the penetrant is preferably added at a temperature of 50~80°C.

[0034] In this invention, in step S2, the deoiled bitumen is preferably added at a temperature of 100~120°C.

[0035] In this invention, the addition of penetrant, the addition of deoiled bitumen, the addition of tackifier, the addition of surfactant, anti-aging agent and anti-stripping agent are preferably carried out under stirring conditions.

[0036] The stirring speed is preferably 10~30 r / min, for example: 20 r / min.

[0037] The stirring time is preferably 5 to 15 minutes, for example, 5 minutes or 10 minutes.

[0038] In a preferred embodiment, the vegetable oil is preheated to 80°C, then a penetrant is added, and the mixture is stirred at 20 r / min for 5 min. The mixture is then heated to 100°C, and deoiled asphalt is added. The mixture is stirred at 20 r / min for 5 min, then a tackifier is slowly and evenly added, and stirred at 20 r / min for 5 min. The surfactant, anti-aging agent, and anti-stripping agent are added sequentially, and the mixture is stirred at 20 r / min for 10 min to obtain the vegetable oil-based asphalt repair material.

[0039] In a more preferred embodiment, expired edible vegetable oil is preheated to 80°C and then kerosene is added. After stirring at 20 r / min for 5 min, the mixture is heated to 100°C, and natural resin-type deoiled asphalt is added. After stirring at 20 r / min for 5 min, petroleum resin is slowly and evenly added. After stirring at 20 r / min for 5 min, sodium dodecyl sulfate, diphenyl dicarboxylate, and anti-stripping agent quicklime are added sequentially. After stirring at 20 r / min for 10 min, vegetable oil-based asphalt repair material is obtained.

[0040] The present invention also provides a plant oil-based asphalt repair material, which is prepared by the preparation method of the plant oil-based asphalt repair material described above.

[0041] In this invention, the bonding strength of the plant oil-based bitumen repair material (measured using GB / T16777-2008-7.2 Bond Strength Test Method B) is preferably 0.40~0.50 MPa, for example: 0.41, 0.44, 0.45 or 0.47.

[0042] In this invention, the aromatic content of the plant oil-based bitumen repair material (measured by rod thin-layer chromatography / flame hydrogen ionization (TLC / FID)) is preferably 80.0%~90.0%, for example: 83.9%, 84.1%, 86.2%, 87.6%, 88.7% or 89.6%.

[0043] In this invention, the TFOT viscosity ratio before and after (measured by thin film oven aging test) of the plant oil-based asphalt repair material is preferably 1.35~1.50, for example: 1.35, 1.37, 1.38, 1.39, 1.40 or 1.43.

[0044] This invention also provides the application of the vegetable oil-based asphalt repair material described above in repairing aged asphalt and preparing recycled asphalt.

[0045] In the above scheme, the preferred mass ratio of the vegetable oil-based asphalt repair material to the aged asphalt is (5~10):100, for example 7:100, 8:100 or 9:100.

[0046] The present invention also provides a recycled asphalt, which includes the vegetable oil-based asphalt repair material and aged asphalt as described above.

[0047] In this invention, the adhesion grade of the recycled asphalt (measured by the water immersion method according to standard T0616-1993) is preferably 5.

[0048] In this invention, the penetration of the recycled asphalt (measured using the standard T0604-2011 asphalt penetration test, 25°C, 0.1 mm) is preferably 70.5~75.0, for example: 70.5, 71.2, 71.5, 71.8, 72.2, 72.3, 72.8 or 73.2.

[0049] In this invention, the softening point of the recycled asphalt (measured using the ring and ball method) is preferably 46.5~50.0℃, for example: 46.8℃, 47.1℃, 47.2℃, 47.3℃, 47.9℃, 48.0℃, 48.1℃, 48.4℃ or 48.8℃.

[0050] In this invention, the ductility of the recycled asphalt (measured using the standard T0605-2011 asphalt ductility test, 5℃, cm) is preferably 58.0~63.0, for example: 58.7, 59.1, 59.3, 59.8, 60.1, 60.2, 60.5, 60.8, 61.1 or 61.3.

[0051] This invention uses expired edible vegetable oil as the main raw material, effectively solving the problem of reusing expired edible vegetable oil and preventing it from re-entering the dining table and posing a health risk. Applying expired edible vegetable oil to the production of vegetable oil-based asphalt repair materials allows for its reuse, effectively conserving petroleum resources, achieving waste-to-waste treatment, and facilitating the regeneration and reuse of aged asphalt. This aligns with the green, low-carbon, waste-utilization, and recyclable green road construction concept.

[0052] In this invention, aromatic components refer to asphalt aromatic components, which are components in asphalt that are insoluble in n-heptane but soluble in toluene. They are the dispersed components of asphaltenes and gums in asphalt.

[0053] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0054] The reagents and raw materials used in this invention are all commercially available.

[0055] The positive and progressive effects of this invention are as follows:

[0056] (1) The preparation method of the plant oil-based asphalt repair material provided by the present invention obtains a plant oil-based asphalt repair material with good adhesion, high bonding strength and high aromatic content by using the synergistic effect between the base oil, which is mainly composed of expired edible vegetable oil, deoiled asphalt, surfactant, thickener, penetrant, anti-aging agent and anti-stripping agent.

[0057] (2) The plant oil-based asphalt repair material prepared by the present invention has good permeability and dispersibility, and can quickly penetrate into aged asphalt and react with the aged components therein to improve the performance of asphalt. The recycled asphalt prepared using the plant oil-based asphalt repair material of the present invention has a penetration, softening point and ductility that exceed those of commercially available new asphalt (such as Zhenhai No. 70 new asphalt).

[0058] (3) When the plant oil-based asphalt repair material prepared by the present invention is used to prepare recycled asphalt, it can give it good anti-aging properties, extend the service life of recycled asphalt, and improve its durability.

[0059] (4) The preparation method of the plant oil-based asphalt repair material of the present invention has the advantages of wide availability and low price. It not only provides a new way for the market to deal with expired waste, but also significantly reduces the production cost of plant oil-based asphalt repair material, which has good economic benefits. Moreover, the production process of this method is simple, practical and easy to promote and produce in the market. Detailed Implementation

[0060] The present invention is further illustrated below by way of embodiments, but the invention is not limited to the scope of the embodiments described herein. Experimental methods in the following embodiments that do not specify specific conditions were performed according to conventional methods and conditions, or as selected according to the product instructions.

[0061] In the following embodiments, the expired edible vegetable oil used was expired Fulinmen non-GMO grade 1 soybean oil; the surfactant used was sodium dodecyl sulfate; the deoiled asphalt used was natural resin-type deoiled asphalt (purchased from Hebei Xiangbei New Material Technology Co., Ltd.); the penetrant used was kerosene; the tackifier used was petroleum resin (purchased from Puyang Hengtai Petrochemical Co., Ltd., C9 petroleum resin); the anti-aging agent used was diphenylcarbamate; and the anti-stripping agent used was slaked lime. Furthermore, this invention also uses two commercially available regenerators, designated as Commercially Available Regenerator No. 1 (LKJ type asphalt regenerator purchased from Sichuan Yuanda Tongtu Highway Materials Technology Co., Ltd.) and Commercially Available Regenerator No. 2 (asphalt regenerator purchased from Taian Anfeng New Material Technology Co., Ltd.).

[0062] Example 1.1

[0063] The components and contents of the plant oil-based asphalt repair material prepared in this embodiment are shown in Table 1. The preparation method of the plant oil-based asphalt repair material includes the following steps:

[0064] Expired edible vegetable oil (expired Fulinmen non-GMO grade 1 soybean oil) was preheated to 80°C, and then a penetrant (kerosene) was added. The mixture was stirred at 20 r / min for 5 min, and then heated to 100°C. De-oiled asphalt (natural resin-type de-oiled asphalt) was added, and the mixture was stirred at 20 r / min for 5 min. Then, a thickener (petroleum resin) was slowly and evenly added, and the mixture was stirred at 20 r / min for 5 min. Then, a surfactant (sodium dodecyl sulfate), an anti-aging agent (diphenyl phthalamide), and an anti-stripping agent (hydrated lime) were added in sequence. The mixture was stirred at 20 r / min for 10 min to obtain the vegetable oil-based asphalt repair material.

[0065] Components: Vegetable oil, de-oiled asphalt, surfactant, penetrant, thickener, anti-aging agent, anti-stripping agent, expired Fulinmen non-GMO grade 1 soybean oil, natural resin type de-oiled asphalt, sodium dodecyl sulfate, kerosene, petroleum resin, diphenyl phthalamide, slaked lime. Example 1.1: 90 parts, 5 parts, 5 parts, 5 parts, 5 parts, 5 parts. Example 1.2: 90 parts, 10 parts, 10 parts, 10 parts, 10 parts, 10 parts. Example 1.3: 70 parts, 5 parts, 5 parts, 5 parts, 5 parts. Example 1.4: 70 parts, 10 parts, 10 parts, 10 parts, 10 parts. Example 1.5: 80 parts, 5 parts, 5 parts, 5 parts, 5 parts. Example 1.680 parts 10 parts 10 parts 10 parts 10 parts 10 parts 10 parts Comparative Example 1.160 parts 5 parts 5 parts 5 parts 5 parts 5 parts Comparative Example 1.2110 parts 5 parts 5 parts 5 parts 5 parts 5 parts Comparative Example 1.390 parts - 5 parts 5 parts 5 parts 5 parts Comparative Example 1.490 parts 5 parts - 5 parts 5 parts 5 parts Comparative Example 1.590 parts 5 parts 5 parts - 5 parts 5 parts Comparative Example 1.690 parts 5 parts 5 parts - 5 parts 5 parts Comparative Example 1.790 parts 5 parts 5 parts 5 parts - 5 parts Comparative Example 1.890 parts 5 parts 5 parts 5 parts 5 parts -

[0066] Example 1.2

[0067] The components and contents of the plant oil-based asphalt repair material prepared in this embodiment are shown in Table 1. The preparation method of the plant oil-based asphalt repair material is the same as in Embodiment 1.

[0068] Example 1.3

[0069] The components and contents of the plant oil-based asphalt repair material prepared in this embodiment are shown in Table 1. The preparation method of the plant oil-based asphalt repair material is the same as in Embodiment 1.

[0070] Example 1.4

[0071] The components and contents of the plant oil-based asphalt repair material prepared in this embodiment are shown in Table 1. The preparation method of the plant oil-based asphalt repair material is the same as in Embodiment 1.

[0072] Example 1.5

[0073] The components and contents of the plant oil-based asphalt repair material prepared in this embodiment are shown in Table 1. The preparation method of the plant oil-based asphalt repair material is the same as in Embodiment 1.

[0074] Example 1.6

[0075] The components and contents of the plant oil-based asphalt repair material prepared in this embodiment are shown in Table 1. The preparation method of the plant oil-based asphalt repair material is the same as in Embodiment 1.

[0076] Example 2.1

[0077] Regenerated asphalt was prepared by using the vegetable oil-based asphalt repair material obtained in Example 1.1 and aged asphalt, wherein the mass ratio of the vegetable oil-based asphalt repair material to the aged asphalt was 5:100.

[0078] Example 2.2

[0079] Regenerated asphalt was prepared by using the vegetable oil-based asphalt repair material obtained in Example 1.1 and aged asphalt, wherein the mass ratio of the vegetable oil-based asphalt repair material to the aged asphalt was 8:100.

[0080] Example 2.3

[0081] Regenerated asphalt was prepared by using the vegetable oil-based asphalt repair material obtained in Example 1.2 and aged asphalt, wherein the mass ratio of the vegetable oil-based asphalt repair material to the aged asphalt was 7:100.

[0082] Example 2.4

[0083] Regenerated asphalt was prepared by using the vegetable oil-based asphalt repair material obtained in Example 1.2 and aged asphalt, wherein the mass ratio of the vegetable oil-based asphalt repair material to the aged asphalt was 9:100.

[0084] Example 2.5

[0085] Regenerated asphalt was prepared by using the vegetable oil-based asphalt repair material obtained in Example 1.3 and aged asphalt, wherein the mass ratio of the vegetable oil-based asphalt repair material to the aged asphalt was 5:100.

[0086] Example 2.6

[0087] Regenerated asphalt was prepared by using the vegetable oil-based asphalt repair material obtained in Example 1.3 and aged asphalt, wherein the mass ratio of the vegetable oil-based asphalt repair material to the aged asphalt was 8:100.

[0088] Example 2.7

[0089] Regenerated asphalt was prepared using the vegetable oil-based asphalt repair material obtained in Example 1.4 and aged asphalt, wherein the mass ratio of the vegetable oil-based asphalt repair material to the aged asphalt was 7:100.

[0090] Example 2.8

[0091] Regenerated asphalt was prepared by using the vegetable oil-based asphalt repair material obtained in Example 1.4 and aged asphalt, wherein the mass ratio of the vegetable oil-based asphalt repair material to the aged asphalt was 10:100.

[0092] Example 2.9

[0093] Regenerated asphalt was prepared by using the vegetable oil-based asphalt repair material obtained in Example 1.5 and aged asphalt, wherein the mass ratio of the vegetable oil-based asphalt repair material to the aged asphalt was 8:100.

[0094] Example 2.10

[0095] Regenerated asphalt was prepared by using the vegetable oil-based asphalt repair material obtained in Example 1.6 and aged asphalt, wherein the mass ratio of the vegetable oil-based asphalt repair material to the aged asphalt was 8:100.

[0096] Comparative Example 1.1

[0097] The components and contents of the plant oil-based asphalt repair material prepared in this embodiment are shown in Table 1. The preparation method of the plant oil-based asphalt repair material is the same as in Embodiment 1.

[0098] Comparative Example 1.2

[0099] The components and contents of the plant oil-based asphalt repair material prepared in this embodiment are shown in Table 1. The preparation method of the plant oil-based asphalt repair material is the same as in Embodiment 1.

[0100] Comparative Example 1.3

[0101] The components and contents of the plant oil-based asphalt repair material prepared in this embodiment are shown in Table 1. The preparation method of the plant oil-based asphalt repair material is the same as in Embodiment 1.

[0102] Comparative Example 1.4

[0103] The components and contents of the plant oil-based asphalt repair material prepared in this embodiment are shown in Table 1. The preparation method of the plant oil-based asphalt repair material is the same as in Embodiment 1.

[0104] Comparative Example 1.5

[0105] The components and contents of the plant oil-based asphalt repair material prepared in this embodiment are shown in Table 1. The preparation method of the plant oil-based asphalt repair material is the same as in Embodiment 1.

[0106] Comparative Example 1.6

[0107] The components and contents of the plant oil-based asphalt repair material prepared in this embodiment are shown in Table 1. The preparation method of the plant oil-based asphalt repair material is the same as in Embodiment 1.

[0108] Comparative Example 1.7

[0109] The components and contents of the plant oil-based asphalt repair material prepared in this embodiment are shown in Table 1. The preparation method of the plant oil-based asphalt repair material is the same as in Embodiment 1.

[0110] Comparative Example 1.8

[0111] The components and contents of the plant oil-based asphalt repair material prepared in this embodiment are shown in Table 1. The preparation method of the plant oil-based asphalt repair material is the same as in Embodiment 1.

[0112] Comparative Example 2.1

[0113] Regenerated asphalt was prepared by using the vegetable oil-based asphalt repair material obtained in Example 1.1 and aged asphalt, wherein the mass ratio of the vegetable oil-based asphalt repair material to the aged asphalt was 3:100.

[0114] Comparative Example 2.2

[0115] Regenerated asphalt was prepared by using the vegetable oil-based asphalt repair material obtained in Example 1.1 and aged asphalt, wherein the mass ratio of the vegetable oil-based asphalt repair material to the aged asphalt was 12:100.

[0116] Comparative Example 2.3

[0117] Regenerated asphalt was prepared by using the vegetable oil-based asphalt repair material obtained in Comparative Example 1.1 and aged asphalt, wherein the mass ratio of the vegetable oil-based asphalt repair material to the aged asphalt was 8:100.

[0118] Comparative Example 2.4

[0119] Regenerated asphalt was prepared by using the vegetable oil-based asphalt repair material obtained in Comparative Example 1.2 and aged asphalt, wherein the mass ratio of the vegetable oil-based asphalt repair material to the aged asphalt was 8:100.

[0120] Comparative Example 2.5

[0121] Regenerated asphalt was prepared by using the vegetable oil-based asphalt repair material obtained in Comparative Example 1.3 and aged asphalt, wherein the mass ratio of the vegetable oil-based asphalt repair material to the aged asphalt was 8:100.

[0122] Comparative Example 2.6

[0123] Regenerated asphalt was prepared by using the vegetable oil-based asphalt repair material obtained in Comparative Example 1.4 and aged asphalt, wherein the mass ratio of the vegetable oil-based asphalt repair material to the aged asphalt was 8:100.

[0124] Comparative Example 2.7

[0125] Regenerated asphalt was prepared by using the vegetable oil-based asphalt repair material obtained in Comparative Example 1.5 and aged asphalt, wherein the mass ratio of the vegetable oil-based asphalt repair material to the aged asphalt was 8:100.

[0126] Comparative Example 2.8

[0127] Regenerated asphalt was prepared by using the vegetable oil-based asphalt repair material obtained in Comparative Example 1.6 and aged asphalt, wherein the mass ratio of the vegetable oil-based asphalt repair material to the aged asphalt was 8:100.

[0128] Comparative Example 2.9

[0129] Regenerated asphalt was prepared by using the vegetable oil-based asphalt repair material obtained in Comparative Example 1.7 and aged asphalt, wherein the mass ratio of the vegetable oil-based asphalt repair material to the aged asphalt was 8:100.

[0130] Comparative Example 2.10

[0131] Regenerated asphalt was prepared by using the vegetable oil-based asphalt repair material obtained in Comparative Example 1.8 and aged asphalt, wherein the mass ratio of the vegetable oil-based asphalt repair material to the aged asphalt was 8:100.

[0132] Comparative Example 2.11

[0133] Regenerated asphalt was prepared using commercially available No. 1 regenerator and aged asphalt, wherein the mass ratio of vegetable oil-based asphalt repair material to aged asphalt was 8:100.

[0134] Comparative Example 2.12

[0135] Regenerated asphalt was prepared using commercially available No. 2 regenerator and aged asphalt, wherein the mass ratio of vegetable oil-based asphalt repair material to aged asphalt was 8:100.

[0136] Example 1

[0137] Property testing of plant oil-based bitumen repair materials

[0138] (1) Test method

[0139] The vegetable oil-based asphalt repair materials prepared in Examples 1.1-1.6 and Comparative Examples 1.1-1.8, as well as commercially available No. 1 and No. 2 rejuvenators, were tested. The bonding strength was tested using GB / T16777-2008-7.2 Bonding Strength Test Method B. The aromatic content was tested using rod thin-layer chromatography / hydrogen flame (TLC / FID) with a heptane / toluene mixture (volume ratio 1:4) as the developing solvent. The viscosity ratio before and after TFOT was tested using a thin-film oven aging test.

[0140] (2) Test results

[0141] Table 2

[0142] Bond strength (MPa) Aromatic content (%) TFOT viscosity ratio before and after Example 1.1 0.47 89.6 1.43 Example 1.2 0.45 88.7 1.38 Example 1.3 0.41 83.9 1.39 Example 1.4 0.44 84.1 1.40 Example 1.5 0.47 86.2 1.35 Example 1.6 0.45 87.6 1.37 Comparative Example 1.1 0.51 88.1 3.15 Comparative Example 1.2 0.27 87.5 1. 37 Comparative Examples: 1.30.4255.91.36 Comparative Examples: 1.40.4185.41.33 Comparative Examples: 1.50.4484.91.31 Comparative Examples: 1.60.2685.91.42 Comparative Examples: 1.70.4183.52.89 Comparative Examples: 1.80.3378.41.28 Commercially Available No. 1 Recycling Agent: 0.3882.11.34 Commercially Available No. 2 Recycling Agent: 0.4540.82.66 Recommended Values: ≥0.30 ≥30.0 ​​≤3.00

[0143] The test results are shown in Table 2. The TFOT viscosity ratio of the vegetable oil-based asphalt repair material prepared in Comparative Example 1.1 was too high, while the bond strength of the vegetable oil-based asphalt repair material prepared in Comparative Example 1.2 was too low. This indicates that the selection of the mass fraction of vegetable oil has a significant impact on the properties of the vegetable oil-based asphalt repair material.

[0144] In Comparative Example 1.3, the aromatic content of the plant oil-based asphalt repair material prepared without de-oiled asphalt was significantly lower than that of Examples 1.1-1.6, indicating that adding de-oiled asphalt can effectively increase the aromatic content of the plant oil-based asphalt repair material. In Comparative Example 1.6, the bond strength of the plant oil-based asphalt repair material prepared without a tackifier was lower than that of Examples 1.1-1.6, indicating that adding a tackifier has a significant positive effect on improving the bond strength of the plant oil-based asphalt repair material. In Comparative Example 1.7, the TFOT viscosity ratio before and after preparation of the plant oil-based asphalt repair material prepared without an anti-aging agent was higher than that of Examples 1.1-1.6, indicating that adding an anti-aging agent can make the plant oil-based asphalt repair material of the present invention have better stability and durability. In Comparative Example 1.8, the bond strength, aromatic content, and TFOT viscosity ratio before and after preparation of the plant oil-based asphalt repair material prepared without an anti-stripping agent were all lower than those of Examples 1.1-1.6, indicating that adding an anti-stripping agent has a positive impact on improving the above-mentioned indicators of the plant oil-based asphalt repair material.

[0145] Although the vegetable oil-based bitumen repair materials prepared in Comparative Examples 1.4-1.5 met the requirements in terms of bond strength and aromatic content, their TFOT viscosity ratio before and after preparation was slightly lower than that in Examples 1.1-1.6, and the recycled bitumen prepared from them had poor performance in subsequent applications.

[0146] Compared with commercially available No. 1 rejuvenator, the plant oil-based asphalt repair material prepared by this invention has better bonding strength. Compared with commercially available No. 2 rejuvenator, the plant oil-based asphalt repair material prepared by this invention has a higher aromatic content. Furthermore, the TFOT viscosity ratio before and after rejuvenator No. 1 and No. 2 in the market cannot meet the requirements of this application.

[0147] Example 2

[0148] Performance testing of recycled asphalt

[0149] (1) Test method

[0150] Adhesion, penetration, softening point, and ductility tests were conducted on Examples 2.1-2.10, Comparative Examples 2.1-2.12, aged asphalt, and Zhenhai No. 70 new asphalt. The adhesion test method was the water immersion method (Standard T0616-1993); the penetration test method was the asphalt penetration test (Standard T0604-2011); the softening point test method was the ring and ball method; and the ductility test method was the asphalt ductility test (Standard T0605-2011).

[0151] (2) Test results

[0152] Table 3

[0153] Adhesion grade, penetration (25℃, 0.1mm), softening point (℃), ductility (5℃, cm). Example 2.15: 73.24: 8.16: 0.2. Example 2.25: 72.34: 7.25: 8.7. Example 2.35: 73.24: 8.85: 9.1. Example 2.45: 71.84: 8.46: 1.3. Example 2.55: 70.54: 6.86: 0.5. Example 2.65: 71.24: 7.15: 9.3. Example 2.75: 72.84: 8.05: 9.8. Example 2.85: 72.34: 7.96: 1.1. Example 2.95: 71.54: 7.36: 0.1. Example 2.105: 72.24: 8.16: 0.8. Comparative Example 2.15: 38.56: 6.53: 8.9. Comparative Example 2.25102.629.757.4 Comparative Example 2.3557.847.542.1 Comparative Example 2.4556.948.136.5 Comparative Example 2.5556.450.236.6 Comparative Example 2.6453.153.434.9 Comparative Example 2.7552.453.933.5 Comparative Example 2.8352.255.731.1 Comparative Example 2.9349.657.529.7 Comparative Example 2.10347.756.327.5 Comparative Example 2.11236.158.915.2 Comparative Example 2.12233.960.219.4 Aged Asphalt 326.544.20.5 Zhenhai No. 70 New Asphalt 570.046.040.0

[0154] The test results are shown in Table 3. As can be seen from Table 3, the adhesion grades of Comparative Examples 2.6 and 2.8 to 2.12 are all worse than those of Examples 2.1 to 2.10, which means that the adhesion performance between recycled asphalt and aggregate is poor and not conducive to subsequent practical applications.

[0155] The penetration values ​​of Comparative Examples 2.3 to 2.12 were all lower than those of Examples 2.1 to 2.10, indicating that the performance of recycled asphalt could not meet the requirements when the amount of vegetable oil was not within the appropriate range or when other corresponding components were lacking. The penetration values ​​of Comparative Examples 2.1 and 2.2 were significantly lower and higher than those of Examples 2.1 to 2.10, respectively. This was due to the insufficient or excessive amount of vegetable oil-based asphalt repair material. The higher the penetration value, the lower the viscosity of the asphalt, the softer the asphalt, and the worse the high-temperature performance. Conversely, the lower the penetration value, the harder the asphalt, and the worse the low-temperature performance.

[0156] The softening points of Comparative Examples 2.1 and 2.5-2.12 are all higher than those of Examples 2.1-2.10, while the softening point of Comparative Example 2.2 is significantly lower than that of Examples 2.1-2.8. A higher softening point indicates higher thermal stability of the asphalt. However, asphalt with a high softening point has poor flexibility at low temperatures, resulting in poor plasticity and applicability of recycled asphalt. Therefore, the softening point needs to be kept within a suitable application range.

[0157] The ductility of Comparative Examples 2.1 to 2.12 is less than that of Examples 2.1 to 2.10. The greater the ductility, the better the flexibility and crack resistance of the asphalt. Therefore, it is shown that the recycled asphalt prepared by the present invention has excellent toughness and plasticity.

[0158] Compared with aged asphalt, the above-mentioned indicators of the recycled asphalt prepared by this invention are significantly improved; compared with commercially available Zhenhai No. 70 new asphalt, the penetration, softening point and ductility of the recycled asphalt prepared by this invention are higher.

[0159] The above embodiments are merely examples for clear illustration and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations, and any obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A vegetable oil based asphalt repair material, characterized in that, The plant oil-based asphalt repair material comprises the following components in parts by weight: 70-90 parts plant oil, 5-10 parts deoiled asphalt, 5-10 parts surfactant, 5-10 parts penetrant, 5-10 parts tackifier, 5-10 parts anti-aging agent, and 5-10 parts anti-stripping agent.

2. The vegetable oil-based asphalt repair material of claim 1, wherein, It meets one or more of the following conditions: (1) The vegetable oil is an expired edible vegetable oil, such as expired Fulinmen non-GMO grade 1 soybean oil; (2) The deoiled bitumen is a natural resin-type deoiled bitumen; (3) The surfactant is sodium dodecyl sulfate; (4) The penetrant is kerosene; (5) The tackifier is petroleum resin; (6) The anti-aging agent is an aromatic amine antioxidant, preferably one of diphenyldiamide, N-benzyl-2-naphthylamine and N-isobutyl-2-naphthylamine, for example: diphenyldiamide; (7) The anti-stripping agent is slaked lime.

3. The vegetable oil-based asphalt repair material of claim 1, wherein, It satisfies any one of the following conditions: (1) The plant oil-based asphalt repair material comprises the following components in parts by weight: 90 parts of plant oil, 5 parts of de-oiled asphalt, 5 parts of surfactant, 5 parts of penetrant, 5 parts of tackifier, 5 parts of anti-aging agent and 5 parts of anti-stripping agent. (2) The plant oil-based asphalt repair material comprises the following components in parts by weight: 90 parts of plant oil, 10 parts of de-oiled asphalt, 10 parts of surfactant, 10 parts of penetrant, 10 parts of tackifier, 10 parts of anti-aging agent and 10 parts of anti-stripping agent. (3) The plant oil-based asphalt repair material comprises the following components in parts by weight: 70 parts of plant oil, 5 parts of de-oiled asphalt, 5 parts of surfactant, 5 parts of penetrant, 5 parts of tackifier, 5 parts of anti-aging agent and 5 parts of anti-stripping agent; (4) The plant oil-based asphalt repair material comprises the following components in parts by weight: 70 parts of plant oil, 10 parts of de-oiled asphalt, 10 parts of surfactant, 10 parts of penetrant, 10 parts of tackifier, 10 parts of anti-aging agent and 10 parts of anti-stripping agent. (5) The plant oil-based asphalt repair material comprises the following components in parts by weight: 80 parts of plant oil, 5 parts of de-oiled asphalt, 5 parts of surfactant, 5 parts of penetrant, 5 parts of tackifier, 5 parts of anti-aging agent and 5 parts of anti-stripping agent. (6) The plant oil-based asphalt repair material comprises the following components in parts by weight: 80 parts of plant oil, 10 parts of de-oiled asphalt, 10 parts of surfactant, 10 parts of penetrant, 10 parts of tackifier, 10 parts of anti-aging agent and 10 parts of anti-stripping agent. (7) The plant oil-based asphalt repair material comprises the following components in parts by weight: 90 parts of expired edible vegetable oil, 5 parts of natural resin-type de-oiled asphalt, 5 parts of sodium dodecyl sulfate, 5 parts of kerosene, 5 parts of petroleum resin, 5 parts of diphenyl dicarboxylate and 5 parts of quicklime. (8) The plant oil-based asphalt repair material comprises the following components in parts by weight: 90 parts of expired edible vegetable oil, 10 parts of natural resin-type deoiled asphalt, 10 parts of sodium dodecyl sulfate, 10 parts of kerosene, 10 parts of petroleum resin, 10 parts of diphenyl dicarboxylate and 10 parts of quicklime. (9) The plant oil-based asphalt repair material comprises the following components in parts by weight: 70 parts of expired edible vegetable oil, 5 parts of natural resin-type de-oiled asphalt, 5 parts of sodium dodecyl sulfate, 5 parts of kerosene, 5 parts of petroleum resin, 5 parts of diphenyl dicarboxylate and 5 parts of quicklime. (10) The plant oil-based asphalt repair material comprises the following components in parts by weight: 70 parts of expired edible vegetable oil, 10 parts of natural resin-type de-oiled asphalt, 10 parts of sodium dodecyl sulfate, 10 parts of kerosene, 10 parts of petroleum resin, 10 parts of diphenyl dicarboxylate and 10 parts of quicklime. (11) The plant oil-based asphalt repair material comprises the following components in parts by weight: 80 parts of expired edible vegetable oil, 5 parts of natural resin-type de-oiled asphalt, 5 parts of sodium dodecyl sulfate, 5 parts of kerosene, 5 parts of petroleum resin, 5 parts of diphenyl dicarboxylate and 5 parts of quicklime. (12) The plant oil-based asphalt repair material comprises the following components in parts by weight: 80 parts of expired edible vegetable oil, 10 parts of natural resin-type deoiled asphalt, 10 parts of sodium dodecyl sulfate, 10 parts of kerosene, 10 parts of petroleum resin, 10 parts of diphenyl dicarboxylate and 10 parts of quicklime.

4. A method of preparing a vegetable oil-based asphalt repair material, characterized by, It includes the following steps: S1: Add a penetrant to the vegetable oil to obtain mixture A; S2: Add deoiled bitumen to mixture A to obtain mixture B; S3: Add a thickener to mixture B, followed by a surfactant, an anti-aging agent, and an anti-stripping agent to obtain a vegetable oil-based asphalt repair material.

5. The method of claim 4, wherein the vegetable oil-based asphalt repair material is prepared by mixing the vegetable oil and the asphalt at a temperature of 100 to 150°C. It meets one or more of the following conditions: (1) In step S1, the penetrant is added at a temperature of 50~80°C; (2) In step S2, the deoiled bitumen is added at a temperature of 100~120℃; (3) The operations of adding penetrant, adding deoiled asphalt, adding tackifier, adding surfactant, anti-aging agent and anti-stripping agent are all carried out under stirring conditions; The stirring speed is preferably 10~30 r / min, for example: 20 r / min; The stirring time is preferably 5 to 15 minutes, for example, 5 minutes or 10 minutes. Preferably, the vegetable oil is preheated to 80°C, then the penetrant is added, and the mixture is stirred at 20 r / min for 5 min. After stirring, the mixture is heated to 100°C, then deoiled asphalt is added, and the mixture is stirred at 20 r / min for 5 min. After stirring, the tackifier is slowly and evenly added, and the mixture is stirred at 20 r / min for 5 min. After stirring, the surfactant, anti-aging agent and anti-stripping agent are added in sequence, and the mixture is stirred at 20 r / min for 10 min to obtain the vegetable oil-based asphalt repair material. More preferably, expired edible vegetable oil is preheated to 80°C and then kerosene is added. After stirring at 20 r / min for 5 min, the mixture is heated to 100°C, and natural resin-type deoiled asphalt is added. After stirring at 20 r / min for 5 min, petroleum resin is slowly and evenly added. After stirring at 20 r / min for 5 min, sodium dodecyl sulfate, diphenyl dicarboxylate, and anti-stripping agent quicklime are added sequentially. After stirring at 20 r / min for 10 min, vegetable oil-based asphalt repair material is obtained.

6. A vegetable oil based asphalt repair material characterized in that, It is prepared using the method for preparing plant oil-based bitumen repair materials as described in claim 4 or 5.

7. The vegetable oil-based asphalt repair material of any one of claims 1-3 and 6, wherein, It meets one or more of the following conditions: (1) The bonding strength of the plant oil-based bitumen repair material is 0.40~0.50 MPa, for example: 0.41, 0.44, 0.45 or 0.47; (2) The aromatic content of the plant oil-based asphalt repair material is 80.0%~90.0%, for example: 83.9%, 84.1%, 86.2%, 87.6%, 88.7% or 89.6%; (3) The TFOT viscosity ratio of the plant oil-based bitumen repair material is 1.35~1.50, for example: 1.35, 1.37, 1.38, 1.39, 1.40 or 1.

43.

8. The application of a vegetable oil-based asphalt repair material as described in any one of claims 1-3 and 6-7 in repairing aged asphalt and preparing recycled asphalt; wherein The preferred ratio of the quality of the vegetable oil-based asphalt repair material to the aged asphalt is (5~10):100, for example, 7:100, 8:100 or 9:

100.

9. A reclaimed asphalt characterized in that, It includes vegetable oil-based bitumen repair materials and aged bitumen as described in any one of claims 1-3 and 6-7.

10. The reclaimed asphalt of claim 9, wherein, It meets one or more of the following conditions: (1) The adhesion grade of the recycled asphalt is 5; (2) The penetration of the recycled bitumen is 70.5~75.0, for example: 70.5, 71.2, 71.5, 71.8, 72.2, 72.3, 72.8 or 73.2; (3) The softening point of the recycled asphalt is 46.5~50.0℃, for example: 46.8℃, 47.1℃, 47.2℃, 47.3℃, 47.9℃, 48.0℃, 48.1℃, 48.4℃ or 48.8℃; (4) The ductility of the recycled asphalt is 58.0~63.0, for example: 58.7, 59.1, 59.3, 59.8, 60.1, 60.2, 60.5, 60.8, 61.1 or 61.3.