Asphalt pavement regeneration repair material as well as preparation method and application thereof

Abstract

The invention discloses an asphalt pavement regeneration repair material as well as a preparation method and application thereof, and belongs to the technical field of pavement materials. The asphalt regenerant, the hydrocarbon compound, the polybasic acid and the alkylamine compound are compounded, the asphalt pavement is regenerated and repaired at normal temperature, the internal substance composition of the aged asphalt is recovered synergistically, the loss factor, the softness and the binding power of the aged asphalt are recovered, and the purpose of in-situ regeneration of the asphalt pavement is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of pavement materials, and in particular relates to an asphalt pavement regeneration and repair material and a preparation method and application thereof. Background Art

[0002] Asphalt pavement is widely used for its excellent driving comfort and safety. my country's highways and municipal trunk roads have basically been paved with asphalt mixtures. Asphalt pavement is exposed to the natural environment for a long time, and is eroded by ultraviolet rays, oxygen, rainwater, etc., which will cause asphalt aging, resulting in the reduction of asphalt bonding properties, asphalt brittleness and hardness, and loss of its original bonding function. In addition, under the action of long-term driving loads, asphalt pavement is also prone to rutting, cracking and other diseases. If not handled in time, rainwater will penetrate into the road, causing more serious diseases.

[0003] Chinese patent CN115637052B discloses a warm mix regeneration agent for hot regeneration in situ and its preparation method. The warm mix regeneration agent for hot regeneration in situ provided by it effectively restores the performance of aged SBS, and provides a more compact mixture at the same compaction temperature, and can further improve the high temperature stability, water stability, low temperature crack resistance and fatigue resistance of the hot regeneration mixture in situ. However, it is necessary to use machinery on site for stirring and heating and other processes. Chinese patent CN115304347B discloses a composite material for repairing cracks in asphalt pavement and its preparation process, which adopts an emulsified asphalt-MPC composite repair system, according to the high early strength design requirements, combined with the early strength characteristics of magnesium phosphate cement and the strong adhesion and excellent stability of emulsified asphalt, so that the composite material has the rigidity of inorganic materials and the flexibility of organic materials, and at the same time has the characteristics of rapid opening of traffic and good stability in the later stage. However, this method only fills the cracks, and does not repair the aged asphalt in the mixture.

[0004] Therefore, in order to deal with early diseases such as cracks, peeling, and pockmarks, there is an urgent need for a low-cost, easy-to-use asphalt pavement regeneration and repair material that can regenerate and repair asphalt pavement at room temperature and restore the indicators of aged asphalt pavement. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides an asphalt pavement regeneration and repair material and a preparation method and application thereof.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] An asphalt pavement regeneration and repair material, comprising an asphalt regeneration agent, a hydrocarbon compound, a polyacid and an alkylamine compound;

[0008] The asphalt regeneration agent is one or more of soybean oil, aromatic hydrocarbon mineral oil, furfural extracted oil, and cycloalkane oil; the hydrocarbon compound is one or more of terpenes, aliphatic hydrocarbons, and cycloalkanes.

[0009] As a preferred embodiment of the present invention, the polyacid is one or more of a dibasic acid and a tribasic acid.

[0010] As a preferred embodiment of the present invention, the alkylamine compound is one or more of alkylamine, alkyldiamine and aliphatic quaternary amine.

[0011] As a preferred embodiment of the present invention, the asphalt pavement regeneration and repair material includes the following raw materials in parts by weight: 29 to 41 parts by weight of asphalt regeneration agent, 12 to 18 parts by weight of hydrocarbon compounds, 7 to 13 parts by weight of polyacids, and 35 to 45 parts by weight of alkylamine compounds.

[0012] The present invention also claims a method for preparing the asphalt pavement regeneration and repair material, comprising the following steps:

[0013] (1) mixing an asphalt regeneration agent, a hydrocarbon compound and a polyacid to obtain a mixture A;

[0014] (2) Adding the alkylamine compound into the mixture A and stirring to obtain the asphalt pavement regeneration and repair material.

[0015] The present invention also claims to protect the use of the asphalt pavement regeneration and repair material in asphalt pavement repair, spraying the asphalt pavement regeneration and repair material on an aged asphalt pavement and curing for 18-24 hours.

[0016] As a preferred embodiment of the present invention, the amount of the asphalt pavement regeneration and repair material is 1.0-2.3L / m 2 .

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention compounds asphalt regeneration agent, hydrocarbon compounds, polyacids and alkylamine compounds, and sprays them on aged asphalt pavement at room temperature to regenerate and repair the asphalt pavement, synergistically restore the internal material composition of the aged asphalt, and restore the loss factor, softness and adhesion of the aged asphalt, thereby achieving the purpose of in-situ regeneration of the asphalt pavement. DETAILED DESCRIPTION

[0018] In order to better illustrate the purpose, technical solutions and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments.

[0019] Example 1

[0020] An asphalt pavement regeneration and repair material, the preparation method of which comprises the following steps:

[0021] (1) 37 parts by weight of aromatic hydrocarbon mineral oil, 15 parts by weight of cyclopentane, and 11 parts by weight of adipic acid were weighed and placed in a container for stirring at a stirring speed of 2800 r / min for 30 min to obtain a mixture A;

[0022] (2) Weigh 42 parts by weight of tallow diamine, add it to mixture A, and continue stirring with a stirrer at a speed of 700 r / min for 25 min to obtain an asphalt pavement regeneration and repair material.

[0023] Example 2

[0024] An asphalt pavement regeneration and repair material, the preparation method of which comprises the following steps:

[0025] (1) 33 parts by weight of cycloalkyl oil, 16 parts by weight of terpene hydrocarbons, and 9 parts by weight of trimellitic acid were weighed and placed in a container for stirring at a stirring speed of 2000 r / min for 40 min to obtain a mixture A;

[0026] (2) Weigh 39 parts by weight of 1227 aliphatic quaternary amine, add it to mixture A, and continue stirring with a stirrer at a speed of 1000 r / min for 20 min to obtain an asphalt pavement regeneration and repair material.

[0027] Example 3

[0028] An asphalt pavement regeneration and repair material, the preparation method of which comprises the following steps:

[0029] (1) Weighing 42 parts by weight of soybean oil, 13 parts by weight of aliphatic hydrocarbon, and 10 parts by weight of phthalic acid into a container and stirring them at a stirring speed of 2300 r / min for 35 min to obtain a mixture A;

[0030] (2) Weigh 37 parts by weight of stearylamine, add it to mixture A, and continue stirring with a stirrer at a speed of 900 r / min for 25 min to obtain an asphalt pavement regeneration and repair material.

[0031] Example 4

[0032] An asphalt pavement regeneration and repair material, the preparation method of which comprises the following steps:

[0033] (1) 29 parts by weight of furfural extracted oil, 18 parts by weight of cyclohexane, and 13 parts by weight of isophthalic acid were weighed and placed in a container for stirring at a stirring speed of 2800 r / min for 30 min to obtain a mixture A;

[0034] (2) Weigh 45 parts by weight of tallow diamine, add it to mixture A, and continue stirring with a stirrer at a speed of 700 r / min for 25 min to obtain an asphalt pavement regeneration and repair material.

[0035] Example 5

[0036] An asphalt pavement regeneration and repair material, the preparation method of which comprises the following steps:

[0037] (1) 21 parts by weight of soybean oil, 18 parts by weight of aromatic mineral oil, 10 parts by weight of cyclohexane, 2 parts by weight of aliphatic hydrocarbons, 4 parts by weight of isophthalic acid, and 3 parts by weight of trimellitic acid were weighed and placed in a container for stirring at a stirring speed of 2800 r / min for 30 min to obtain a mixture A;

[0038] (2) Weigh 20 parts by weight of stearylamine and 15 parts by weight of coconut diamine, add them to mixture A, and continue stirring with a stirrer at a speed of 700 r / min for 25 min to obtain an asphalt pavement regeneration and repair material.

[0039] Comparative Example 1

[0040] An asphalt pavement regeneration and repair material, the preparation method of which comprises the following steps:

[0041] (1) 37 parts by weight of aromatic mineral oil and 11 parts by weight of adipic acid were weighed and placed in a container for stirring at a stirring speed of 2800 r / min for 30 min to obtain a mixture A;

[0042] (2) Weigh 42 parts by weight of tallow diamine, add it to mixture A, and continue stirring with a stirrer at a speed of 700 r / min for 25 min to obtain an asphalt pavement regeneration and repair material.

[0043] Comparative Example 2

[0044] An asphalt pavement regeneration and repair material, the preparation method of which comprises the following steps:

[0045] (1) 16 parts by weight of terpene hydrocarbons and 9 parts by weight of trimellitic acid were weighed and placed in a container for stirring at a stirring speed of 2000 r / min for 40 min to obtain a mixture A;

[0046] (2) Weigh 39 parts by weight of 1227 aliphatic quaternary amine, add it to mixture A, and continue stirring with a stirrer at a speed of 1000 r / min for 20 min to obtain an asphalt pavement regeneration and repair material.

[0047] Comparative Example 3

[0048] Weigh 2 kg of cationic emulsified asphalt (PC-2 type) as repair material.

[0049] Comparative Example 4

[0050] An asphalt pavement regeneration and repair material, the preparation method of which comprises the following steps:

[0051] (1) 37 parts by weight of aromatic mineral oil and 15 parts by weight of cyclopentane were weighed and placed in a container for stirring at a stirring speed of 2800 r / min for 30 min to obtain a mixture A;

[0052] (2) Weigh 42 parts by weight of tallow diamine, add it to mixture A, and continue stirring with a stirrer at a speed of 700 r / min for 25 min to obtain an asphalt pavement regeneration and repair material.

[0053] Comparative Example 5

[0054] An asphalt pavement regeneration and repair material, the preparation method of which comprises the following steps:

[0055] 37 parts by weight of aromatic mineral oil, 15 parts by weight of cyclopentane and 11 parts by weight of adipic acid were weighed and placed in a container for stirring at a stirring speed of 2800 r / min for 55 min to obtain an asphalt pavement regeneration and repair material.

[0056] Comparative Example 6

[0057] The only difference between the preparation method of the asphalt pavement regeneration and repair material in this comparative example and that in Example 1 is that adipic acid is replaced with an equal weight of carboxymethyl cellulose.

[0058] Comparative Example 7

[0059] The only difference between the preparation method of an asphalt pavement regeneration and repair material in this comparative example and that in Example 1 is that cyclopentane is replaced with an equal weight of petroleum ether.

[0060] Comparative Example 8

[0061] The only difference between the preparation method of an asphalt pavement regeneration and repair material in this comparative example and that in Example 1 is that tallow diamine is replaced with an equal weight of sodium dodecylbenzene sulfonate.

[0062] Effect example

[0063] 13 asphalt mixtures (300mm×300mm×50mm) were rapidly aged, and then the regeneration repair materials prepared in Examples 1 to 5 and Comparative Examples 1 to 8 were uniformly sprayed on the surface of the aged mixture (with a dosage of 1.4L / ㎡). The mixture was allowed to stand at room temperature (25°C) for 24 hours, and then 10mm thick of the surface was cut off. The asphalt in the remaining mixture was fractionated and collected by centrifugal separation. The conventional indicators of the collected asphalt (softening point, needle penetration, elongation) were tested, and the loss factor was tested by a dynamic shear rheometer. The loss factor of the aged asphalt mixture before repair was 0.91. The test results are as follows.

[0064] Table 1

[0065] serial number Softening point (R&B) Needle penetration (25℃, 5s, 100g) Elongation (15℃) Loss factor (tanδ) Example 1 49.7℃ 66.8mm >100cm 2.03 Example 2 51.3℃ 69.0mm >100cm 1.80 Example 3 50.4℃ 68.4mm >100cm 1.90 Example 4 50.8℃ 69.3mm >100cm 1.87 Example 5 49.9℃ 67.9mm >100cm 1.96 Comparative Example 1 62.7℃ 35.5mm 37.6cm 0.90 Comparative Example 2 59.5℃ 42.1mm 40.3cm 1.06 Comparative Example 3 64.2℃ 33.8mm 21.4cm 0.88 Comparative Example 4 63.2℃ 37.1mm 68.7cm 0.92 Comparative Example 5 62.4℃ 43.2mm 89.1cm 1.03 Comparative Example 6 54.4℃ 62.7mm 46.3cm 0.98 Comparative Example 7 61.8℃ 37.7mm 40.9cm 0.92 Comparative Example 8 60.3℃ 47.3mm 79.2cm 1.03

[0066] The asphalt pavement regeneration and repair materials obtained in the embodiments of the present invention can better restore the high and low temperature performance and viscoelastic properties of aged asphalt. According to comparative examples 1-5, it can be seen that the lack of one of the asphalt regeneration agent, hydrocarbon compound, polyacid and alkylamine compound cannot completely restore the performance of aged asphalt. Comparative example 3 is a commonly used emulsified asphalt, and the application method of the present invention cannot regenerate the aged road asphalt. Comparative examples 6-8 replace the adipic acid, cyclopentane and tallow diamine of the present invention with conventional substitute substances respectively, and cannot give full play to the performance advantages of the specific repair materials of the present invention.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. An asphalt pavement regeneration and repair material, characterized in that: Including asphalt regeneration agents, hydrocarbon compounds, polyacids and alkylamine compounds; The asphalt regeneration agent is one or more of soybean oil, aromatic hydrocarbon mineral oil, furfural extracted oil, and cycloalkane oil; the hydrocarbon compound is one or more of terpenes, aliphatic hydrocarbons, and cycloalkanes.

2. The asphalt pavement regeneration and repair material according to claim 1, characterized in that: The polyacid is one or more of a dibasic acid and a tribasic acid.

3. The asphalt pavement regeneration and repair material according to claim 1, characterized in that: The alkylamine compound is one or more of alkylamine, alkyldiamine and aliphatic quaternary amine.

4. The asphalt pavement regeneration and repair material according to claim 1, characterized in that: The asphalt pavement regeneration and repair material comprises the following raw materials in parts by weight: 29 to 41 parts by weight of asphalt regeneration agent, 12 to 18 parts by weight of hydrocarbon compounds, 7 to 13 parts by weight of polyacids and 35 to 45 parts by weight of alkylamine compounds.

5. The method for preparing the asphalt pavement regeneration and repair material according to any one of claims 1 to 4, characterized in that: The steps include: (1) mixing an asphalt regeneration agent, a hydrocarbon compound and a polyacid to obtain a mixture A; (2) Adding the alkylamine compound into the mixture A and stirring to obtain the asphalt pavement regeneration and repair material.

6. The use of the asphalt pavement regeneration and repair material according to any one of claims 1 to 4 in asphalt pavement repair, characterized in that: The asphalt pavement regeneration and repair material is sprayed on the aged asphalt pavement and cured at room temperature for 18-24 hours.

7. The use according to claim 6, characterized in that asphalt The amount of pavement regeneration and repair material used is 1.0-2.3L / m 2 .