阅读说明：本技术 一种水性环氧改性乳化沥青混凝土及其制备方法 (Waterborne epoxy modified emulsified asphalt concrete and preparation method thereof ) 是由 栾红霞 杨志伟 李宗帅 李茂顺 于 2018-06-12 设计创作，主要内容包括：本发明公开了一种水性环氧改性乳化沥青混凝土及其制备方法,该水性环氧改性乳化沥青混凝土按重量百分比包括如下组分：石料：85％-90％、基质沥青：4.5-5％、沥青改性剂：0.2-0.25％、热水：2-2.5％、自乳化水性环氧树脂：1-2％、固化剂：0.1-0.2％、PH调节剂0.1-0.5％。本发明的有益效果为：固化快、强度高,生产成本低,节约能源,资源利用率高；使用时无需加热,降低了环境污染。(The invention discloses a waterborne epoxy modified emulsified asphalt concrete and a preparation method thereof, wherein the waterborne epoxy modified emulsified asphalt concrete comprises the following components in percentage by weight: stone material: 85% -90%, matrix asphalt: 4.5-5% of asphalt modifier: 0.2-0.25%, hot water: 2-2.5%, self-emulsifying aqueous epoxy resin: 1-2% and a curing agent: 0.1-0.2% and 0.1-0.5% of PH regulator. The invention has the beneficial effects that: the curing is fast, the strength is high, the production cost is low, the energy is saved, and the resource utilization rate is high; when in use, the heating is not needed, and the environmental pollution is reduced.)

1. The waterborne epoxy modified emulsified asphalt concrete is characterized by comprising the following components in percentage by weight:

stone material: 85% -90%, matrix asphalt: 4.5-5% of asphalt modifier: 0.2-0.25%, hot water: 2-2.5%, self-emulsifying aqueous epoxy resin: 1-2% and a curing agent: 0.1-0.2% and 0.1-0.5% of PH regulator.

2. The aqueous epoxy modified emulsified asphalt concrete as claimed in claim 1, wherein the aqueous epoxy modified emulsified asphalt concrete comprises the following components by weight percent: stone material: 85% -90%, matrix asphalt: 4.8%, asphalt modifier: 0.2%, hot water: 2.2%, self-emulsifying aqueous epoxy resin: 1.5 percent, 0.2 percent of curing agent and 0.1 percent of PH regulator.

3. The aqueous epoxy modified emulsified asphalt concrete as claimed in claim 1, wherein the stone is limestone or basalt.

4. The aqueous epoxy-modified emulsified asphalt concrete according to claim 1, wherein the base asphalt is heavy traffic road petroleum asphalt.

5. The aqueous epoxy-modified emulsified asphalt concrete according to claim 1, wherein the asphalt modifier is a lignin-based substance.

6. The aqueous epoxy-modified emulsified asphalt concrete according to claim 1, wherein the temperature of the hot water is 60 to 65 ℃.

7. The aqueous epoxy modified emulsified asphalt concrete as claimed in claim 1, wherein the self-emulsifying aqueous epoxy resin is a polyether polyol aromatic substance.

8. The aqueous epoxy-modified emulsified asphalt concrete according to claim 1, wherein the curing agent is a polyamine-based mixture.

9. The aqueous epoxy-modified emulsified asphalt concrete according to claim 1, wherein the PH adjuster is sodium hydroxide.

10. The preparation method of the waterborne epoxy modified emulsified asphalt concrete is characterized by comprising the following steps:

s1, adding an asphalt modifier into hot water at the temperature of 60-65 ℃, adjusting the pH value to 12-13, and uniformly stirring to prepare a soap solution;

s2, heating the matrix asphalt to 135-145 ℃;

s3, adding the base asphalt heated in the second step into soap solution to prepare emulsified asphalt;

s4, adding self-emulsifying waterborne epoxy resin and a curing agent into the emulsified asphalt, mixing, and uniformly stirring to obtain waterborne epoxy modified emulsified asphalt;

and S5, mixing the graded stone material and the waterborne epoxy modified emulsified asphalt according to a certain proportion, and uniformly stirring to obtain the waterborne epoxy modified emulsified asphalt concrete.

Technical Field

The invention relates to the technical field of asphalt concrete manufacturing, in particular to aqueous epoxy modified emulsified asphalt concrete and a preparation method thereof.

Background

Disclosure of Invention

The invention provides the waterborne epoxy modified emulsified asphalt concrete and the preparation method thereof, which have the advantages of fast curing, high strength, low production cost, energy conservation and high resource utilization rate; when in use, the heating is not needed, and the environmental pollution is reduced.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the waterborne epoxy modified emulsified asphalt concrete comprises the following components in percentage by weight:

stone material: 85% -90%, matrix asphalt: 4.5-5% of asphalt modifier: 0.2-0.25%, hot water: 2-2.5%, self-emulsifying aqueous epoxy resin: 1-2% and a curing agent: 0.1-0.2% and 0.1-0.5% of PH regulator.

As a preferable technical scheme of the invention, the waterborne epoxy modified emulsified asphalt concrete comprises the following components in percentage by weight: stone material: 85% -90%, matrix asphalt: 4.8%, asphalt modifier: 0.2%, hot water: 2.2%, self-emulsifying aqueous epoxy resin: 1.5 percent, 0.2 percent of curing agent and 0.1 percent of PH regulator.

As a preferred technical scheme of the invention, the stone is limestone or basalt.

In a preferred embodiment of the present invention, the base asphalt is heavy traffic road petroleum asphalt.

In a preferred embodiment of the present invention, the asphalt modifier is a lignin-based material.

In a preferred embodiment of the present invention, the temperature of the hot water is 60 to 65 ℃.

In a preferred embodiment of the present invention, the self-emulsifying aqueous epoxy resin is a polyether polyol aromatic substance.

In a preferred embodiment of the present invention, the curing agent is a polyamine mixture.

In a preferred embodiment of the present invention, the PH adjuster is sodium hydroxide.

The preparation method of the waterborne epoxy modified emulsified asphalt concrete comprises the following steps:

s1, adding an asphalt modifier into hot water at the temperature of 60-65 ℃, adjusting the pH value to 12-13, and uniformly stirring to prepare a soap solution;

s2, heating the matrix asphalt to 135-145 ℃;

s3, adding the base asphalt heated in the second step into soap solution to prepare emulsified asphalt;

s4, adding self-emulsifying waterborne epoxy resin and a curing agent into the emulsified asphalt, mixing, and uniformly stirring to obtain waterborne epoxy modified emulsified asphalt;

and S5, mixing the graded stone material and the waterborne epoxy modified emulsified asphalt according to a certain proportion, and uniformly stirring to obtain the waterborne epoxy modified emulsified asphalt concrete.

One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

the aqueous epoxy modified emulsified asphalt concrete prepared by the technical scheme of the invention has the advantages of fast curing, high strength, low production cost, energy conservation and high resource utilization rate; when in use, the heating is not needed, and the environmental pollution is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a flow chart of the manufacturing process of the present invention.

Detailed Description

In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.

As shown in fig. 1, the aqueous epoxy modified emulsified asphalt concrete according to the embodiment is characterized by comprising the following components in percentage by weight:

stone material: 85% -90%, matrix asphalt: 4.5-5% of asphalt modifier: 0.2-0.25%, hot water: 2-2.5%, self-emulsifying aqueous epoxy resin: 1-2% and a curing agent: 0.1-0.2% and 0.1-0.5% of PH regulator.

In the embodiment, the waterborne epoxy modified emulsified asphalt concrete comprises the following components in percentage by weight: stone material: 85% -90%, matrix asphalt: 4.8%, asphalt modifier: 0.2%, hot water: 2.2%, self-emulsifying aqueous epoxy resin: 1.5 percent, 0.2 percent of curing agent and 0.1 percent of PH regulator.

In the embodiment, the stone is limestone or basalt.

In the embodiment, the base asphalt is heavy traffic road petroleum asphalt.

In the embodiment, the asphalt modifier is lignin.

Wherein, in the embodiment, the temperature of the hot water is 60-65 ℃.

In the embodiment, the self-emulsifying water-based epoxy resin is polyether polyol aromatic substances.

In the present embodiment, the curing agent is a polyamine mixture.

In this embodiment, the PH adjuster is sodium hydroxide.

The preparation method of the waterborne epoxy modified emulsified asphalt concrete comprises the following steps:

s1, adding an asphalt modifier into hot water at the temperature of 60-65 ℃, adjusting the pH value to 12-13, and uniformly stirring to prepare a soap solution;

s2, heating the matrix asphalt to 135-145 ℃;

s3, adding the base asphalt heated in the second step into soap solution to prepare emulsified asphalt;

s4, adding self-emulsifying waterborne epoxy resin and a curing agent into the emulsified asphalt, mixing, and uniformly stirring to obtain waterborne epoxy modified emulsified asphalt;

and S5, mixing the graded stone material and the waterborne epoxy modified emulsified asphalt according to a certain proportion, and uniformly stirring to obtain the waterborne epoxy modified emulsified asphalt concrete.

More specifically, the matching method comprises the following steps:

1. the performance of coarse aggregate, fine aggregate and mineral powder is detected, and the requirements are in accordance with the relevant regulations of the technical Specification for highway asphalt construction;

2. determining the mixing proportion of coarse aggregate, fine aggregate and mineral powder suitable for the product according to the type of the waterborne epoxy modified emulsified asphalt concrete and by combining the actual engineering and the grading regulation of the technical Specification for road asphalt construction;

3. placing the coarse aggregate, the fine aggregate and the mineral powder in a drying oven with the temperature of 105 +/-5 ℃ for drying for 4-6h, and cooling to room temperature in a drying environment; according to the mineral mixture ratio designed in the step 2, calculating and weighing the using amount of the aggregate with each specification according to the mass of each test piece;

4. the method is characterized by comprising the following steps of predicting that the using amount of the waterborne epoxy modified emulsified asphalt in the waterborne epoxy modified emulsified asphalt concrete is 9% by combining theory, namely the mass ratio of the waterborne epoxy modified emulsified asphalt to the total mass of prepared stone is 9%, changing the using amount of the waterborne epoxy modified emulsified asphalt by taking 0.5% as a gradient, designing 8%, 8.5%, 9%, 9.5%, 10%, 10.5% and 11%, mixing the mixture, and compacting and forming a test piece; after certain maintenance conditions, determining the Marshall stability of the test piece, and determining the optimal emulsion dosage by referring to a method for determining the optimal oilstone ratio in the technical Specification for road asphalt construction;

5. mixing the mixture according to the optimal emulsion dosage designed by the experimental steps, forming a test piece, curing under certain conditions, performing a water inlet Marshall experiment according to a method in Highway engineering and asphalt mixture test procedures, and calculating the residual stability so as to verify the water stability of the mixture and the bonding strength of the aggregate and the asphalt;

6. according to the mixture ratio design method, the compaction method and the curing conditions in the step 4, the concrete steps are as follows: after the mixture is stirred at normal temperature and is filled into a test piece, the upper surface and the lower surface are respectively compacted for 50 times for forming, after compaction, the test piece is directly demoulded, placed in a 60 ℃ oven for curing, and then the Marshall stability of the test piece is measured;

experimental data and results

1. And (4) determining the grading range of the mixture according to laboratory tests and combined with actual construction experience. Mix stone materials and mineral powder with three specifications of 10-15mm, 5-10mm and 0-5mm machine-made sand into a mixture required by the waterborne epoxy modified emulsified asphalt concrete according to determined grades

Optimum gradation range of mixture

2. Marshall stability test results

The specificity of the waterborne epoxy modified emulsified asphalt concrete is as follows:

1. the self-emulsifying water-based epoxy resin and the curing agent in the invention are quickly reacted and cured to form strength, the emulsified asphalt mixture is quickly formed in a short time and is cured at normal temperature for 4-6 hours;

2. the self-emulsifying water-based epoxy resin with high strength and the curing agent form a cross-linked network structure at the initial stage of reaction, the cross-linked structure is more and more dense along with the increase of time, and the strength is higher than that of the existing product;

3. the cost is low, and the maintenance cost of the waterborne epoxy modified emulsified asphalt concrete is lower than that of the hot asphalt according to practice;

4. compared with hot asphalt, the energy-saving and resource-saving waterborne epoxy modified emulsified asphalt concrete can save heat energy, reduce the discharge amount of pollutants and save energy;

5. the construction condition is improved, the environment pollution is reduced, the water-based epoxy modified emulsified asphalt concrete is constructed at normal temperature, the heating is avoided, the environment pollution is reduced, and the working condition of constructors is improved.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.