1. A preparation method of cationic single-component waterborne epoxy asphalt and application thereof in preventive maintenance technology are characterized in that: the method comprises the following steps:

(1) weighing 40-60 parts of solid bisphenol A epoxy resin, 5-10 parts of n-butyl alcohol, 5-10 parts of ethylene glycol butyl ether and 10-30 parts of chain extender, adding into a reaction kettle, heating to 90-110 ℃, reacting for 2-3h, cooling to room temperature, adding 5-10 parts of inorganic acid, and uniformly stirring to obtain an intermediate A;

(2) weighing 2-6 parts of liquid bisphenol A epoxy resin, 40-70 parts of petroleum asphalt and 1-7 parts of SBS elastomer, mixing, heating to 160-180 ℃, stirring and developing for 2-3h, weighing 1-5 parts of emulsifier and 50-100 parts of water, adjusting the temperature to 55-65 ℃ to prepare soap liquid, and shearing and grinding to obtain an intermediate B;

(3) and mixing the intermediate A and the intermediate B, heating to 50-70 ℃, stirring at a high speed, and keeping the temperature for 3 hours to obtain the cationic single-component aqueous epoxy asphalt.

2. The preparation method of the cationic single-component aqueous epoxy asphalt according to claim 1 and the application thereof in the preventive maintenance technology are characterized in that: the epoxy value of the solid bisphenol A epoxy resin in the step (1) is 0.08-0.22.

3. The preparation method of the cationic single-component aqueous epoxy asphalt according to claim 1 and the application thereof in the preventive maintenance technology are characterized in that: the chain extender in the step (1) is one or a mixture of more than two of ethylenediamine, N-N-dimethylethanolamine and 1, 2-propane diamine.

4. The preparation method of the cationic single-component aqueous epoxy asphalt according to claim 1 and the application thereof in the preventive maintenance technology are characterized in that: the inorganic acid in the step (1) is one of acetic acid, iodic acid and boric acid.

5. The preparation method of the cationic single-component aqueous epoxy asphalt according to claim 1 and the application thereof in the preventive maintenance technology are characterized in that: in the step (2), the epoxy value of the liquid bisphenol A epoxy resin is 0.38-0.56.

6. The preparation method of the cationic single-component aqueous epoxy asphalt according to claim 1 and the application thereof in the preventive maintenance technology are characterized in that: when the cationic single-component water-based epoxy asphalt is in a spreading type, the emulsifier in the step (2) is one of quick-crack and quick-setting 1831, 18331 and AA-63D.

7. The preparation method of the cationic single-component aqueous epoxy asphalt according to claim 1 and the application thereof in the preventive maintenance technology are characterized in that: when the cationic single-component water-based epoxy asphalt is of a mixing type, the emulsifier in the step (2) is one of slow-breaking and quick-setting MQK-3M, SM-LS.

8. The preparation method of the cationic single-component aqueous epoxy asphalt according to claim 1 and the application thereof in the preventive maintenance technology are characterized in that: the mass ratio of the intermediate A to the intermediate B is 2: 1, and the stirring speed is 2000-4000 r/min.

9. The preparation method of the cationic single-component aqueous epoxy asphalt according to claim 1 and the application thereof in the preventive maintenance technology are characterized in that: the spreading amount of the cationic single-component water-based epoxy asphalt during spreading construction is 0.8-1.2kg/m²(ii) a The oilstone ratio is 9-12% during mixing construction.

10. The cationic one-component waterborne epoxy asphalt prepared according to claim 1 is used in preventive maintenance technology.

Background

At present, road construction and maintenance are developed in the direction of low carbon, energy conservation and environmental protection, and the traditional maintenance technology of milling and paving needs hot mixing construction and has great environmental pollution, so experts and scholars commonly research a series of preventive maintenance technologies of cold construction. The preventive maintenance technology of cold construction has higher requirements on the cementing material, one key index is the viscosity of the cementing material at 60 ℃, and the larger the viscosity is, the better the binding property on the aggregate is. At present, emulsified asphalt or polymer modified emulsified asphalt materials are generally used in the market, and the viscosity of the materials at 60 ℃ is generally low and is not enough to wrap asphalt mixtures with larger porosity. Therefore, micro-surfacing, fine-surfacing and cold-mix cold-laying techniques using such materials have insufficient durability when applied in preventive maintenance techniques.

Disclosure of Invention

The purpose of the invention is as follows: the invention aims to provide a preparation method of cationic single-component waterborne epoxy asphalt and application of the cationic single-component waterborne epoxy asphalt in a preventive maintenance technology.

The technical scheme is as follows: the invention provides a preparation method of cationic single-component waterborne epoxy asphalt and application thereof in a preventive maintenance technology, comprising the following steps:

(1) weighing 40-60 parts of solid bisphenol A epoxy resin, 5-10 parts of n-butyl alcohol, 5-10 parts of ethylene glycol butyl ether and 10-30 parts of chain extender, adding into a reaction kettle, heating to 90-110 ℃, reacting for 2-3h, cooling to room temperature, adding 5-10 parts of inorganic acid, and uniformly stirring to obtain an intermediate A;

(2) weighing 2-6 parts of liquid bisphenol A epoxy resin, 40-70 parts of petroleum asphalt and 1-7 parts of SBS elastomer, mixing, heating to 160-180 ℃, stirring and developing for 2-3h, weighing 1-5 parts of emulsifier and 50-100 parts of water, adjusting the temperature to 55-65 ℃ to prepare soap liquid, and shearing and grinding to obtain an intermediate B;

(3) and mixing the intermediate A and the intermediate B, heating to 50-70 ℃, stirring at a high speed, and keeping the temperature for 3 hours to obtain the cationic single-component aqueous epoxy asphalt.

Further, the epoxy value of the solid bisphenol A epoxy resin in the step (1) is 0.08-0.22.

Further, the chain extender in the step (1) is one or a mixture of more than two of ethylenediamine, N-N-dimethylethanolamine and 1, 2-propane diamine.

Further, in the step (1), the inorganic acid is one of acetic acid, iodic acid and boric acid.

Further, the epoxy value of the liquid bisphenol A epoxy resin in the step (2) is 0.38-0.56.

Further, when the cationic single-component water-based epoxy asphalt is in a spreading type, the emulsifier in the step (2) is one of quick-crack and quick-set 1831, 18331 and AA-63D.

Further, when the cationic single-component water-based epoxy asphalt is of a mixing type, the emulsifier in the step (2) is one of MQK-3M, SM-LS of a slow-breaking and quick-setting type.

Further, the mass ratio of the intermediate A to the intermediate B is 2: 1, and the stirring speed is 2000-4000 r/min.

Furthermore, the spreading amount of the cationic single-component water-based epoxy asphalt during spreading construction is 0.8-1.2kg/m²(ii) a The oilstone ratio is 9-12% during mixing construction.

The cationic one-component waterborne epoxy asphalt prepared according to claim 1 is used in preventive maintenance technology.

The invention prepares cation type single-component water-based epoxy prepolymer, then mixes and stirs with liquid epoxy modified emulsified asphalt, and the liquid epoxy molecules in the liquid epoxy modified emulsified asphalt and the water-based epoxy prepolymer generate molecular migration according to the similar compatibility principle to form the emulsion with fluidity. The emulsified asphalt modified by the waterborne epoxy prepolymer and the liquid epoxy resin has obviously improved mechanical property, particularly the viscosity at 60 ℃ can reach more than 20000 Pa.S, and the emulsified asphalt can be well wrapped with aggregate. At present, the cold mixing and cold paving technology only adopts dense-graded concrete due to insufficient performance of cementing materials, so that the noise of a road surface is larger, and the driving comfort is poor. The cationic single-component aqueous epoxy asphalt has excellent mechanical property, can be used for cold-mixed asphalt mixture with the porosity of 12-16%, and has good pavement durability and low driving noise after compaction.

Has the advantages that: the cationic single-component waterborne epoxy asphalt has the solid content of not less than 58 percent, the softening point of not less than 85 ℃, the bonding strength of not less than 0.6MPa, the elongation at break of not less than 80 percent and the viscosity of not less than 20000 Pa.S at 60 ℃. The prepared cationic single-component water-based epoxy asphalt is divided into a spreading type and a mixing type, wherein the spreading type is used for technologies such as fine surface treatment, cold-paving anti-slip surface treatment and the like, and the mixing type is used for a cold-mixing cold-paving preventive maintenance technology, so that the cationic single-component water-based epoxy asphalt is more practical and has industrial application value.

Detailed Description

Example 1

(1) Weighing 50 parts of solid bisphenol A epoxy resin with an epoxy value of 0.11, 8 parts of n-butyl alcohol, 5 parts of butyl cellosolve and 20 parts of ethylenediamine, adding into a reaction kettle, heating to 100 ℃, reacting for 2.5 hours, cooling to room temperature, adding 8 parts of acetic acid, and uniformly stirring to obtain an intermediate A;

(2) weighing 4 parts of liquid bisphenol A epoxy resin with an epoxy value of 0.46, 70 parts of No. 70 petroleum asphalt and 5 parts of SBS elastomer, mixing, heating to 170 ℃, stirring and developing for 3 hours, weighing 3 parts of 1831 type emulsifier and 80 parts of water, adjusting the temperature to 60 ℃ to prepare soap liquid, and shearing and grinding to obtain an intermediate B;

(3) and mixing the intermediate A and the intermediate B (wherein the mass of the intermediate A/the mass of the intermediate B is 2: 1), heating to 60 ℃, stirring at a high speed of 3000r/min, and preserving heat for 3h to obtain the cationic single-component water-based epoxy asphalt.

The spreading amount of the prepared cationic single-component water-based epoxy asphalt is 1.0kg/m²The technical indexes for testing the cationic single-component water-based epoxy asphalt are as follows:

TABLE 1 technical indices of cationic single-component waterborne epoxy asphalt

Example 2

(1) Weighing 45 parts of solid bisphenol A epoxy resin with an epoxy value of 0.20, 6 parts of N-butanol, 9 parts of butyl cellosolve and 15 parts of N-N dimethylethanolamine, adding the materials into a reaction kettle, heating to 110 ℃, reacting for 3 hours, cooling to room temperature, adding 10 parts of boric acid, and uniformly stirring to obtain an intermediate A;

(2) weighing 5 parts of liquid bisphenol A epoxy resin with an epoxy value of 0.45, 65 parts of No. 70 petroleum asphalt and 3 parts of SBS elastomer, mixing, heating to 165 ℃, stirring and developing for 2 hours, weighing 4 parts of MQK-3M emulsifier and 80 parts of water, adjusting the temperature to 58 ℃ to prepare soap liquid, and shearing and grinding to obtain an intermediate B;

(3) and mixing the intermediate A and the intermediate B (wherein the mass of the intermediate A/the mass of the intermediate B is 2: 1), heating to 55 ℃, stirring at a high speed of 3800r/min, and keeping the temperature for 3h to obtain the cationic single-component water-based epoxy asphalt.

The prepared cationic single-component water-based epoxy asphalt has the oilstone ratio of 10 percent, and the technical indexes for testing the cationic single-component water-based epoxy asphalt are as follows:

TABLE 2 technical indices of cationic single-component waterborne epoxy asphalt

Example 3

(1) Weighing 55 parts of solid bisphenol A epoxy resin with an epoxy value of 0.08, 5 parts of n-butyl alcohol, 10 parts of ethylene glycol butyl ether and 30 parts of 1, 2-propane diamine, adding into a reaction kettle, heating to 95 ℃, reacting for 2.5 hours, cooling to room temperature, adding 7 parts of iodic acid, and uniformly stirring to obtain an intermediate A;

(2) weighing 2 parts of liquid bisphenol A epoxy resin with an epoxy value of 0.54, 60 parts of No. 70 petroleum asphalt and 2 parts of SBS elastomer, mixing, heating to 165 ℃, stirring and developing for 2.5 hours, weighing 2 parts of AA-63D type emulsifier and 70 parts of water, adjusting the temperature to 62 ℃ to prepare soap liquid, and shearing and grinding to obtain an intermediate B;

(3) and mixing the intermediate A and the intermediate B (wherein the mass of the intermediate A/the mass of the intermediate B is 2: 1), heating to 63 ℃, stirring at a high speed of 2800r/min, and preserving heat for 3h to obtain the cationic single-component water-based epoxy asphalt.

The spreading amount of the prepared cationic single-component water-based epoxy asphalt is 1.1kg/m²The technical indexes for testing the cationic single-component water-based epoxy asphalt are as follows:

TABLE 3 technical indices of cationic single-component waterborne epoxy asphalt

Example 4

(1) Weighing 44 parts of solid bisphenol A epoxy resin with an epoxy value of 0.13, 6 parts of N-butanol, 7 parts of butyl cellosolve, 15 parts of ethylenediamine and N-N dimethylethanolamine (the mass ratio of the ethylenediamine to the N-N dimethylethanolamine is 1: 1), adding into a reaction kettle, heating to 105 ℃, reacting for 2.7 hours, cooling to room temperature, adding 8 parts of acetic acid, and uniformly stirring to obtain an intermediate A;

(2) weighing 3 parts of liquid bisphenol A epoxy resin with an epoxy value of 0.43, 55 parts of No. 70 petroleum asphalt and 6 parts of SBS elastomer, mixing, heating to 175 ℃, stirring and developing for 2 hours, weighing 4 parts of 18331 type emulsifier and 90 parts of water, adjusting the temperature to 62 ℃ to prepare soap liquid, and shearing and grinding to obtain an intermediate B;

(3) and (3) mixing the intermediate A and the intermediate B (wherein the mass of the intermediate A/the mass of the intermediate B is 2: 1), heating to 56 ℃, stirring at a high speed of 4000r/min, and preserving heat for 3h to obtain the cationic single-component water-based epoxy asphalt.

The spreading amount of the prepared cationic single-component water-based epoxy asphalt is 0.9kg/m²The technical indexes for testing the cationic single-component water-based epoxy asphalt are as follows:

TABLE 4 technical indices of cationic single-component waterborne epoxy asphalt

Example 5

(1) Weighing 58 parts of solid bisphenol A epoxy resin with an epoxy value of 0.21, 6 parts of n-butyl alcohol, 6 parts of butyl cellosolve and 28 parts of 1, 2-propane diamine, adding into a reaction kettle, heating to 100 ℃, reacting for 2.8 hours, cooling to room temperature, adding 8 parts of boric acid, and uniformly stirring to obtain an intermediate A;

(2) weighing 5 parts of liquid bisphenol A epoxy resin with an epoxy value of 0.48, 58 parts of No. 70 petroleum asphalt and 3 parts of SBS elastomer, mixing, heating to 178 ℃, stirring and developing for 3 hours, weighing 4 parts of SM-LS type emulsifier and 90 parts of water, adjusting the temperature to 62 ℃ to prepare soap liquid, and shearing and grinding to obtain an intermediate B;

(3) and mixing the intermediate A and the intermediate B (wherein the mass of the intermediate A/the mass of the intermediate B is 2: 1), heating to 68 ℃, stirring at a high speed of 3200r/min, and preserving heat for 3 hours to obtain the cationic single-component aqueous epoxy asphalt.

The prepared cationic single-component water-based epoxy asphalt has an oilstone ratio of 12 percent, and the technical indexes for testing the cationic single-component water-based epoxy asphalt are as follows:

TABLE 5 technical indices of cationic single-component waterborne epoxy asphalt