阅读说明：本技术 一种环氧改性型冷补沥青混合料的制备方法 (Preparation method of epoxy modified cold-patch asphalt mixture ) 是由 黄明 田健君 史啸 韩明 于 2020-04-26 设计创作，主要内容包括：本发明提供一种环氧改性型冷补沥青混合料的制备方法,该混合料由A组分和B组分构成,所述A组分采用包括以下重量份的原料制成：石料：100份,冷补沥青：6～10份；所述冷补沥青由以下质量分数的原料制成：柴油：11%～23%,聚酰胺：2%～4%,氰乙酸乙酯：2%～3%,道路石油沥青：73%～82%；所述B组分采用包括以下重量份的原料制成：柴油：15～40份,富芳香分油：5～8份,多聚甲醛：6～8份,环氧树脂：44～70份,本发明的产品便于存储、施工和易性优良、成本低廉,同时改善冷补沥青混合料的高温性能、粘附性能、抗水损害性能及疲劳性能,显著提升沥青混合料的路用性能,便捷化施工,增大修补路面的行车舒适性。(The invention provides a preparation method of an epoxy modified cold-patch asphalt mixture, which comprises a component A and a component B, wherein the component A is prepared from the following raw materials in parts by weight: stone material: 100 parts of cold patch asphalt: 6-10 parts of a solvent; the cold patch asphalt is prepared from the following raw materials in percentage by mass: diesel oil: 11-23%, polyamide: 2% -4%, ethyl cyanoacetate: 2% -3%, road petroleum asphalt: 73% -82%; the component B is prepared from the following raw materials in parts by weight: diesel oil: 15-40 parts of aromatic-rich oil: 5-8 parts of paraformaldehyde: 6-8 parts of epoxy resin: 44-70 parts of the asphalt mixture, the product is convenient to store, excellent in construction workability and low in cost, the high-temperature performance, the adhesion performance, the water damage resistance and the fatigue performance of the cold patch asphalt mixture are improved, the pavement performance of the asphalt mixture is obviously improved, the construction is convenient, and the driving comfort of repairing the pavement is improved.)

1. The preparation method of the epoxy modified cold-patch asphalt mixture is characterized by comprising A, B components, wherein the component A is prepared by the following steps:

(1) adding 11-23 parts of diesel oil, 2-4 parts of polyamide and 2-3 parts of ethyl cyanoacetate into 73-82 parts of road petroleum asphalt, and stirring and reacting for 45-120 min at 120-140 ℃ to obtain cold patch asphalt;

(2) heating 100 parts of the dried stone to 160-200 ℃, adding 0.2-0.5 part of slaked lime, adding 6-10 parts of the cold patch asphalt, and uniformly stirring to obtain a component A of the epoxy modified cold patch asphalt mixture finished product;

the material B is prepared by the following steps: mixing 15-40 parts of diesel oil, 5-8 parts of aromatic-rich oil, 6-8 parts of paraformaldehyde and 44-70 parts of epoxy resin at normal temperature, and stirring for 15-120 min to obtain the component B of the epoxy modified cold patch asphalt mixture finished product.

2. The method for preparing an epoxy modified cold-patch asphalt mixture according to claim 1, wherein the polyamide is one or a mixture of two or more of polyamide-6, polyamide-66 and polyamide-610.

3. The preparation method of the epoxy modified cold-patch asphalt mixture according to claim 1, wherein the road petroleum asphalt is one or a mixture of more than two of No. 50-110 road petroleum asphalt; the diesel oil is vehicle diesel oil.

4. The preparation method of the epoxy modified cold-patch asphalt mixture according to claim 1, wherein the ethyl cyanoacetate is a colorless liquid with a molecular formula of NC-CH₂-COOC₂H₅(ii) a The paraformaldehyde is white combustible crystalline powder with a molecular formula of (CH)₂O)_n，n=10-100。

5. The method for preparing the epoxy modified cold-patch asphalt mixture according to claim 1, wherein the aromatic-rich sub-oil is one or a mixture of more than two of petrochemical residual oil A, aromatic oil B and aromatic rubber oil C; the solubility parameter is 18-19 (KJ/m)³）^1/2The dielectric constant is in the range of 3.6 to 3.8.

6. The method for preparing the epoxy modified cold-patch asphalt mixture according to claim 1, wherein the epoxy resin is E-51 or E-44, or a mixture of E-51 and E-44 in any proportion.

7. The method for preparing an epoxy modified cold-patch asphalt mixture according to claim 1, wherein the stone meets the following grading requirements:

the grading selected in spring, summer and autumn, namely the distribution condition of the aggregate particles with different grain diameters, is as follows: the percentage of the aggregate passing through a 9.5mm sieve hole is 100 percent, the percentage passing through a 4.75mm sieve hole is 28 to 42 percent, the percentage passing through a 2.36mm sieve hole is 14 to 25 percent, and the percentage passing through a 0.075mm sieve hole is 0 to 3 percent;

grading in winter: the percentage of aggregate passing through a 9.5mm mesh is 100%, the percentage passing through a 4.75mm mesh is 45% to 65%, the percentage passing through a 2.36mm mesh is 14% to 24%, and the percentage passing through a 0.075mm mesh is 0.

Technical Field

The invention relates to a preparation method of an epoxy modified cold-patch asphalt mixture.

Background

Asphalt pavement is an important pavement form in urban road construction. With the increase of traffic load, the types of the structural layer materials of the asphalt pavement are more and more abundant, and meanwhile, higher requirements are put forward on the service performance of the road. The cold patch asphalt mixture is an asphalt mixture with a wide range of use temperature, is mainly used for rapid pavement repair, pavement maintenance, tunnel pavement paving, special pavement paving in alpine regions and the like, and has been researched and applied in developed countries such as Europe and America in the fifth and sixty years of the last century. However, the imported cold patch asphalt mixture is expensive and exceeds the user bearing capacity, and the cold patch materials sold in the domestic current market generally have the defects of poor storage performance, insufficient cohesive force, low applicability, poor road performance, high implementation cost and the like.

In order to improve the comprehensive performance of the cold patch asphalt, other modifiers can be added into the cold patch asphalt for modification. The existing cold patch asphalt technology applied to asphalt pavements is mainly a storage type cold paving method, namely, the technology is that prepared cold patch asphalt mixture is placed in a storage tank or a storage bag and taken at any time. Although the storage type cold-paving method has obvious advantages in storage performance, construction organization and mixing equipment, the actual repairing effect and weather resistance are difficult to satisfy.

Disclosure of Invention

The invention aims to provide a preparation method of an epoxy modified cold-patch asphalt mixture, which aims to solve the problems of insufficient binding power, easy falling off, easy loosening in water and poor comprehensive pavement performance in the prior art.

In order to achieve the purpose, the technical scheme of the invention is as follows:

the preparation method of the epoxy modified cold-patch asphalt mixture is characterized in that the epoxy modified cold-patch asphalt mixture comprises A, B two components, wherein the component A is prepared by the following steps:

(1) adding 11-23 parts (by weight, the same below) of the diesel oil, 2-4 parts of the polyamide and 2-3 parts of ethyl cyanoacetate into 73-82 parts of the road petroleum asphalt, and stirring and reacting for 45-120 min at 120-140 ℃ to obtain cold patch asphalt;

(2) heating 100 parts of the dried stone to 160-200 ℃, adding 0.2-0.5 part of slaked lime, adding 6-10 parts of the cold patch asphalt, and uniformly stirring to obtain a component A of the epoxy modified cold patch asphalt mixture finished product;

the material B is prepared by the following steps: and mixing 15-40 parts of the diesel oil, 5-8 parts of the aromatic-rich oil, 6-8 parts of the paraformaldehyde and 44-70 parts of the epoxy resin at normal temperature, and stirring for 15-120 min to obtain a finished product B component of the epoxy modified cold-patch asphalt mixture, wherein the total weight is 100 parts.

The polyamide is one or a mixture of more than two of polyamide-6, polyamide-66 or polyamide-610; the road petroleum asphalt is one or a mixture of more than two of No. 50-110 road petroleum asphalt.

The ethyl cyanoacetate is colorless liquid with a molecular formula of NC-CH₂-COOC₂H₅(ii) a The paraformaldehyde is white combustible crystalline powder with a molecular formula of (CH)₂O)_nN is 10-100; the addition of the two raw materials can accelerate the reaction of ethylene oxide, realize the early strength improvement and cover the whole life cycle;

the diesel oil is vehicle diesel oil, such as No. 0 diesel oil;

the aromatic-rich branched oil is one or a mixture of more than two of petrochemical residual oil A, aromatic oil B and aromatic rubber oil C; the solubility parameter is 18-19 (KJ/m)³)^1/2In the range, the dielectric constant is 3.6-3.8;

the epoxy resin is E-51 or E-44, or a mixture of E-51 and E-44 in any proportion;

the stone meets the following grading requirements:

the grading selected in spring, summer and autumn, namely the distribution condition of the aggregate particles with different grain diameters, is as follows: the percentage of the aggregate passing through a 9.5mm sieve hole is 100 percent, the percentage passing through a 4.75mm sieve hole is 28 to 42 percent, the percentage passing through a 2.36mm sieve hole is 14 to 25 percent, and the percentage passing through a 0.075mm sieve hole is 0 to 3 percent;

grading in winter: the percentage of aggregate passing through a 9.5mm mesh is 100%, the percentage passing through a 4.75mm mesh is 45% to 65%, the percentage passing through a 2.36mm mesh is 14% to 24%, and the percentage passing through a 0.075mm mesh is 0.

Further, the construction ratio of the component A to the component B is 1: (0.2 to 0.4); during construction, the component A and the component B are fully mixed according to a proportion and then paved, or the component A is paved firstly, and then the component B is paved after waiting for 5min, so that the component B is permeated into the component A in a solution form.

At present, no application report of epoxy resin and polyamide curing agent in road asphalt exists, and tests show that the introduction of an epoxy curing system with a proper content can improve the high-temperature performance, the adhesion performance and the fatigue performance of a cold-patch asphalt mixture; the polyamide has the performance of a curing agent, the strength of the cold patch asphalt mixture can be greatly improved after the polyamide is cured, and the amino-containing polyamide also can improve the surface tension of the cold patch asphalt, so that the flow performance of the cold patch asphalt is greatly improved, and the problem that the cold patch asphalt cannot be pumped in time through a pipeline during construction is solved; meanwhile, the amido in the polyamide enables the polyamide to have the performance of an anti-stripping agent in asphalt, so that the adhesion performance of the cold patch asphalt can be improved; the amide bond (-NHCO-) in the polyamide forms linear macromolecules in the curing process, wherein-CO-, -NH-groups can form hydrogen bond combination between molecules or between molecules and can also be combined with other molecules to form a space crystal structure, the macroscopic flexibility and the flowability of the molecules formed by combining the linear macromolecules and the hydrogen bonds are better, the viscosity of the cold patch asphalt can be reduced, and the infiltration and the wrapping performance of the cold patch asphalt on the surface of stone are improved, so that the adhesion performance of the cold patch asphalt is improved, and the capability of resisting external force impact to loosen the cold patch asphalt is also improved.

The newly laid epoxy modified cold patch asphalt mixture has a large porosity ratio, rainwater is easy to seep downwards, water damage is easy to occur under the dynamic water pressure of a driving load, and slaked lime is used as an anti-stripping agent and can improve the adhesion capability and the water damage resistance capability of the epoxy modified cold patch asphalt mixture.

The epoxy resin is incompatible with the petroleum asphalt, and the petroleum asphalt can prevent the epoxy resin from generating chemical reaction with the polyamide; the blended aromatic-rich oil improves the compatibility of the epoxy resin and the asphalt.

The invention has the beneficial effects that:

the epoxy modified cold patch asphalt mixture has the advantages of convenience in storage, excellent workability in construction, low cost and reduced energy consumption, greatly improves the bonding capability of the epoxy modified cold patch asphalt mixture, and is not easy to disperse and separate from a wheel band; meanwhile, the high-temperature performance, the adhesion performance, the water damage resistance and the fatigue performance of the cold-patch asphalt mixture are improved, so that the road performance of the asphalt mixture is obviously improved, and the driving comfort of repairing the road surface is improved while the construction is facilitated.

Detailed Description

It should be understood by those skilled in the art that the present embodiment is only for illustrating the present invention and is not to be used as a limitation of the present invention, and the embodiment can be changed or modified within the scope of the claims of the present invention.