CN111363373B - High-stability aqueous epoxy resin modified emulsified asphalt and preparation method thereof - Google Patents
High-stability aqueous epoxy resin modified emulsified asphalt and preparation method thereof Download PDFInfo
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- CN111363373B CN111363373B CN202010339770.4A CN202010339770A CN111363373B CN 111363373 B CN111363373 B CN 111363373B CN 202010339770 A CN202010339770 A CN 202010339770A CN 111363373 B CN111363373 B CN 111363373B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
- C08L95/005—Aqueous compositions, e.g. emulsions
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
- C08J3/03—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
- E01C7/24—Binder incorporated as an emulsion or solution
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
- E01C7/26—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders mixed with other materials, e.g. cement, rubber, leather, fibre
- E01C7/265—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders mixed with other materials, e.g. cement, rubber, leather, fibre with rubber or synthetic resin, e.g. with rubber aggregate, with synthetic resin binder
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2395/00—Bituminous materials, e.g. asphalt, tar or pitch
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Abstract
The invention discloses high-stability aqueous epoxy resin modified emulsified asphalt and a preparation method thereof, and relates to the technical field of road materials. The asphalt is prepared by taking 35-45% of matrix asphalt, 0.9-3% of emulsifier, 3-5% of bentonite thixotropic agent, 4-27% of waterborne epoxy resin, 3-10% of waterborne epoxy curing agent, 0.1-0.5% of anti-stripping agent, 0.02-0.2% of thickening agent, 0.5-2% of pH regulator and 28-38% of water in percentage by mass as raw materials through high-speed shearing emulsification by a colloid mill. The thickening effect of the bentonite thixotropic agent and the thickening agent greatly prolongs the working time of the cementing material and reduces the risk of thickening and segregation of the cementing material in the storage and transportation process; meanwhile, the waterborne epoxy resin modified emulsified asphalt keeps lower kinematic viscosity, can be smoothly sprayed and constructed and can quickly open traffic.
Description
Technical Field
The invention belongs to the technical field of road materials, and particularly relates to high-stability aqueous epoxy resin modified emulsified asphalt and a preparation method thereof.
Background
After the highway is built and put into use, various functions of the road surface show a trend of continuous attenuation under the action of traffic load and various natural forces, and particularly, the surface function which is characterized by insufficient skid resistance is reduced, so that traffic accidents are easily caused, and the safety of travel is seriously threatened. Sealing technologies such as gravel sealing, fiber sealing and the like are preventive maintenance technologies which are frequently adopted in China for recovering the antiskid function of a pavement, but the technology is relatively weak in mutual embedding and squeezing effect among aggregates, limited in bonding capacity of common asphalt cement and small in wrapping area of the aggregates, so that the aggregates in a local area are easy to loosen and fall off, even 'flying stones' are generated, and secondary risks are brought to driving safety.
In order to solve the above problems, in recent years, many researchers have modified emulsified asphalt cements with aqueous epoxy resins to greatly improve the bonding strength of the cement. However, the aqueous epoxy resin and the aqueous curing agent contained in the composite cementing material generally start to react after the system is blended, so the material is required to be used within several hours or even shorter time after production, otherwise, the thickening phenomenon is generated, and the construction can not be smoothly sprayed; on the other hand, if the aqueous epoxy resin and the aqueous curing agent system with a longer curing speed are selected, the strength forming speed after the sealing construction is too low, and the rapid traffic opening is not facilitated.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the high-stability aqueous epoxy resin modified emulsified asphalt and the preparation method thereof, which can effectively prolong the working time of the aqueous epoxy resin modified emulsified asphalt and reduce the risk of thickening or segregation in the storage and transportation process after preparation; meanwhile, the cementing material can be quickly demulsified and formed along with the evaporation of water after being sprayed, so that the quick traffic opening is realized. The waterborne high-stability waterborne epoxy resin modified emulsified asphalt is applied to sealing technologies such as chip sealing, fiber sealing and the like, and can greatly improve the sealing performance and construction convenience.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the high-stability waterborne epoxy resin modified emulsified asphalt is prepared from the following raw materials in percentage by mass: 35 to 45 percent of matrix asphalt, 0.9 to 3 percent of emulsifier, 3 to 5 percent of bentonite thixotropic agent, 4 to 27 percent of waterborne epoxy resin, 3 to 10 percent of waterborne epoxy curing agent, 0.1 to 0.5 percent of anti-stripping agent, 0.02 to 0.2 percent of thickening agent, 0.5 to 2 percent of pH regulator and 28 to 38 percent of water, and the sum of the total mass fraction is 100 percent.
The matrix asphalt is 70# or 90# road petroleum asphalt.
The emulsifier is compounded by a cationic surfactant and a nonionic surfactant, and the mass ratio of the cationic surfactant to the nonionic surfactant is 1: 0.5-5.
The cationic surfactant is one or more of hexadecyl trimethyl ammonium chloride, octadecyl trimethyl ammonium bromide, dodecyl dimethyl benzyl ammonium chloride and hexadecyl propylene diamine.
The nonionic surfactant is one or more of octyl phenol polyoxyethylene ether-10, nonyl phenol polyoxyethylene ether-10 and cetyl alcohol polyoxyethylene ether.
The bentonite thixotropic agent is at least one of sodium bentonite, lithium bentonite and organic bentonite.
The waterborne epoxy resin is one of 50% solid content waterborne emulsion of E35 colloidal epoxy resin, 50% solid content waterborne emulsion of E44 liquid epoxy resin and 50% solid content waterborne emulsion of E51 liquid epoxy resin.
The waterborne epoxy curing agent resin is one of alicyclic amine epoxy curing agent, modified aliphatic amine epoxy curing agent and polyamide epoxy curing agent.
The anti-stripping agent is one or more of tall oil fatty acid, abietic acid and stearic acid.
The thickening agent is one or more of hydroxymethyl cellulose, hydroxyethyl cellulose, polyvinyl alcohol and sodium acrylate.
The pH regulator is one or more of industrial hydrochloric acid and industrial phosphoric acid.
A preparation method of high-stability waterborne epoxy resin modified emulsified asphalt comprises the following steps:
s1, mixing a bentonite thixotropic agent, a thickening agent and water, and stirring at a high speed of 500-2000r/min for 60-120min to obtain a thickened slurry for later use;
s2, adding an emulsifier and a water-based epoxy curing agent into the thickened slurry prepared in the step S1 during stirring, heating to 40-60 ℃, stirring at a high speed of 500-2000r/min for 10-60min, and then adjusting the pH value to 2-4 by using a pH regulator to obtain a mixed soap solution for later use;
s3, heating the base asphalt to 130-150 ℃, adding the anti-stripping agent into the base asphalt during stirring, after uniformly stirring and dispersing, carrying out high-speed shearing emulsification together with the mixed soap liquid prepared in the step S2 through a colloid mill, and cooling to room temperature to obtain emulsified asphalt;
s4, slowly adding the waterborne epoxy resin into the emulsified asphalt prepared in the step S3 in stirring at the rotating speed of 100-300r/min, and continuously stirring and dispersing for 10min after the addition is finished to obtain the high-stability waterborne epoxy resin modified emulsified asphalt.
The beneficial effects of the invention are embodied in the following aspects:
1. the emulsified asphalt has obvious thickening effect through the combined action of the bentonite thixotropic agent and the thickening agent, the reaction speed between the waterborne epoxy resin and the waterborne curing agent in the waterborne epoxy resin modified emulsified asphalt is slowed down, the working time of the cementing material is greatly prolonged, and the risk that the cementing material becomes thick or separates in the storage and transportation process is reduced.
2. Based on the rheological property of the bentonite thixotropic agent, the waterborne epoxy resin modified emulsified asphalt has the obvious shear thinning characteristic, has higher consistency and lower kinematic viscosity, and therefore, does not influence normal spraying construction.
3. After the water-based epoxy resin modified emulsified asphalt is sprayed and constructed, the thickening effect of the bentonite thixotropic agent can be quickly lost along with the evaporation of water, so that the cementing material can be quickly demulsified and form strength, and the quick traffic opening is realized.
Detailed Description
Although the present invention has been described in detail, the present invention is not limited thereto, and those skilled in the art can modify the principle of the present invention, and thus, various modifications made in accordance with the principle of the present invention should be understood to fall within the scope of the present invention.
Example 1
Adding 4 parts of organic bentonite and 0.02 part of hydroxyethyl cellulose into 30.88 parts of water according to mass fraction, and stirring at high speed for 120min by using a high-speed dispersion machine at the rotating speed of 1500r/min to obtain thickened slurry JY 1; adding 1.2 parts of hexadecyl trimethyl ammonium chloride, 1.8 parts of hexadecyl polyoxyethylene ether and 10 parts of ARADUR 250 polyamide curing agent (supplied by Huntsman company in America, active hydrogen equivalent is 425-; heating 40 parts of No. 70 substrate asphalt to 140-150 ℃, then adding 0.1 part of tall oil fatty acid into the substrate asphalt during stirring, after uniformly stirring and dispersing, carrying out high-speed shearing emulsification together with mixed soap liquid ZY1 through a colloid mill, and cooling to room temperature to obtain emulsified asphalt RHLQ 1; slowly adding 10 parts of 50% solid content aqueous emulsion of E44 liquid epoxy resin into RHLQ1 while stirring, wherein the rotating speed is 200r/min, and continuously stirring and dispersing for 10min after the addition is finished to obtain the aqueous epoxy resin modified emulsified asphalt.
Example 2
Adding 5 parts of lithium bentonite and 0.2 part of polyvinyl alcohol (brand number 17-99) into 37.5 parts of water according to mass fraction, and stirring at high speed for 60min by using a high-speed dispersion machine at the rotating speed of 2000r/min to obtain thickened slurry JY 2; adding 0.6 part of dodecyl dimethyl benzyl ammonium chloride, 0.3 part of nonylphenol polyoxyethylene ether-10 and 6 parts of ARADUR 22 modified fatty amine curing agent (supplied by Huntsman corporation in America, the active hydrogen equivalent is 830 g/eq) into JY2 slurry, heating to 60 ℃, stirring at high speed for 60min, the rotating speed is 500r/min, and then adjusting the pH value of the system to 3.0 by using 85% industrial phosphoric acid to obtain mixed soap liquid ZY2 for later use; heating 45 parts of No. 70 matrix asphalt to 135-145 ℃, then adding 0.5 part of abietic acid into the matrix asphalt during stirring, carrying out high-speed shearing emulsification together with mixed soap liquid ZY2 through a colloid mill after uniformly stirring and dispersing, and cooling to room temperature to obtain emulsified asphalt RHLQ 2; slowly adding 4 parts of 50% solid content aqueous emulsion of E35 colloidal epoxy resin into RHLQ2 while stirring, wherein the rotating speed is 100r/min, and continuously stirring and dispersing for 10min after the addition is finished to obtain the aqueous epoxy resin modified emulsified asphalt.
Example 3
Adding 3 parts of sodium bentonite and 0.03 part of hydroxymethyl cellulose into 28.27 parts of water according to mass fraction, and stirring at high speed for 120min by using a high-speed dispersion machine at the rotating speed of 2000r/min to obtain thickened slurry JY 3; adding 0.5 part of octadecyl trimethyl ammonium bromide, 2.5 parts of octyl phenol polyoxyethylene ether-10 and 3 parts of 1, 3-cyclohexyldimethylamine (the purity is 99.0 percent and is supplied by Beijing company, a national medicine group chemical reagent) into the JY3 slurry while stirring, heating to 40 ℃, stirring at a high speed for 60min at the rotating speed of 1000r/min, and then adjusting the pH value of the system to 4.0 by using 33 percent industrial hydrochloric acid to obtain a mixed soap solution ZY3 for later use; heating 35 parts of 90# matrix asphalt to 130-140 ℃, then adding 0.2 part of stearic acid into the matrix asphalt while stirring, after uniformly stirring and dispersing, carrying out high-speed shearing emulsification together with the mixed soap liquid ZY3 through a colloid mill, and cooling to room temperature to obtain emulsified asphalt RHLQ 3; and slowly adding 27 parts of 50% solid content aqueous emulsion of E51 liquid epoxy resin into RHLQ3 while stirring, wherein the rotating speed is 300r/min, and continuously stirring and dispersing for 10min after the addition is finished to obtain the aqueous epoxy resin modified emulsified asphalt.
Comparative example
Adding 1 part of hexadecyl trimethyl ammonium chloride, 1.5 parts of octyl phenol polyoxyethylene ether-10 and 8 parts of ARADUR 250 polyamide curing agent (supplied by the American Huntsman company, active hydrogen equivalent is 425-; heating 42 parts of No. 70 substrate asphalt to 130-140 ℃, then adding 0.1 part of tall oil fatty acid into the substrate asphalt during stirring, after uniformly stirring and dispersing, carrying out high-speed shearing emulsification together with mixed soap liquid ZY4 through a colloid mill, and cooling to room temperature to obtain emulsified asphalt RHLQ 4; slowly adding 8 parts of 50% solid content aqueous emulsion of E44 liquid epoxy resin into RHLQ4 while stirring, wherein the rotating speed is 200r/min, and continuously stirring and dispersing for 10min after the addition is finished to obtain the aqueous epoxy resin modified emulsified asphalt.
Performance evaluation of aqueous epoxy resin modified emulsified asphalt
The Engral viscosity and the rotational viscosity of the waterborne epoxy resin modified emulsified asphalt are respectively measured according to the relevant procedures in an asphalt Engral viscosity test (Engral viscometer) (T0622 plus 1993) and an asphalt rotational viscosity test (Brookfield viscometer) (T0625 plus 2011) in JTG E20-2011 road engineering asphalt and asphalt mixture test procedures, and the test results are shown in Table 1.
The workable time (pot life) of the aqueous epoxy resin modified emulsified asphalt was measured in the following manner: the rotational viscosity of the prepared waterborne epoxy resin modified emulsified asphalt is immediately tested, then the waterborne epoxy resin modified emulsified asphalt is sealed and placed at room temperature, the rotational viscosity is retested every 15min (the standing time is not more than 1 h) or every 30min (the standing time is more than 1 h), when the measured rotational viscosity is more than 2 times of the initial rotational viscosity, the standing storage time at the moment is taken as the working time of the waterborne epoxy resin modified emulsified asphalt, the unit is min, and the test result is shown in table 1.
Table 1 shows the results of performance tests of examples 1, 2 and 3 and comparative example
The data in table 1 show that, compared with the comparative examples in examples 1, 2 and 3, the Engra viscosity is improved by 3-4 times, the working time is improved by more than 11 times, the storage stability is obviously improved, the change of the rotational viscosity is not large, and the smooth spraying construction of the waterborne epoxy resin modified emulsified asphalt can be ensured in the range. Meanwhile, the indexes such as the residual quantity on the screen, the penetration degree, the softening point, the 15 ℃ ductility and the like are almost unchanged, and the embodiment can achieve better emulsification and modification effects. In conclusion, the high-stability waterborne epoxy resin modified emulsified asphalt has higher Engra viscosity, longer workable time and lower kinematic viscosity, and can be normally sprayed and constructed.
Claims (9)
1. The high-stability waterborne epoxy resin modified emulsified asphalt is characterized by being prepared from the following raw materials in percentage by mass: 35 to 45 percent of matrix asphalt, 0.9 to 3 percent of emulsifier, 3 to 5 percent of bentonite thixotropic agent, 4 to 27 percent of waterborne epoxy resin, 3 to 10 percent of waterborne epoxy curing agent, 0.1 to 0.5 percent of anti-stripping agent, 0.02 to 0.2 percent of thickening agent, 0.5 to 2 percent of pH regulator and 28 to 38 percent of water, and the sum of the total mass fraction is 100 percent; the bentonite thixotropic agent is at least one of sodium bentonite, lithium bentonite and organic bentonite; the thickener is one or more of hydroxymethyl cellulose, hydroxyethyl cellulose, polyvinyl alcohol and sodium acrylate.
2. The high-stability aqueous epoxy resin modified emulsified asphalt as claimed in claim 1, wherein the emulsifier is prepared by compounding a cationic surfactant and a nonionic surfactant, and the mass ratio of the cationic surfactant to the nonionic surfactant is 1: 0.5-5.
3. The high-stability aqueous epoxy resin modified emulsified asphalt as claimed in claim 2, wherein the cationic surfactant is one or more of cetyltrimethyl ammonium chloride, octadecyltrimethyl ammonium bromide, dodecyldimethylbenzyl ammonium chloride, and hexadecylpropylenediamine.
4. The high-stability aqueous epoxy resin modified emulsified asphalt as claimed in claim 2, wherein the nonionic surfactant is one or more of polyoxyethylene octylphenol ether-10, polyoxyethylene nonylphenol ether-10, and polyoxyethylene cetyl ether.
5. The high-stability aqueous epoxy resin modified emulsified asphalt as claimed in claim 1, wherein the aqueous epoxy resin is one of a 50% solids aqueous emulsion of E35 colloidal epoxy resin, a 50% solids aqueous emulsion of E44 liquid epoxy resin, and a 50% solids aqueous emulsion of E51 liquid epoxy resin.
6. The high-stability aqueous epoxy resin modified emulsified asphalt as claimed in claim 1, wherein the aqueous epoxy hardener resin is one of alicyclic amine epoxy hardener, modified aliphatic amine epoxy hardener, and polyamide epoxy hardener.
7. The high stability aqueous epoxy resin modified emulsified asphalt as defined in claim 1, wherein the anti-stripping agent is one or more of tall oil fatty acid, rosin acid and stearic acid.
8. A method for preparing the high-stability aqueous epoxy resin modified emulsified asphalt as defined in any one of claims 1 to 7, comprising the steps of:
s1, mixing the bentonite thixotropic agent, the thickening agent and water, and stirring at a high speed of 500-2000r/min for 60-120min to obtain thickened slurry for later use;
s2, adding an emulsifier and a water-based epoxy curing agent into the thickened slurry prepared in the step S1 during stirring, heating and stirring, and then adjusting the pH value to 2-4 by using a pH regulator to obtain a mixed soap liquid for later use;
s3, heating the base asphalt to 130-150 ℃, adding the anti-stripping agent into the base asphalt during stirring, after uniformly stirring and dispersing, carrying out high-speed shearing emulsification together with the mixed soap liquid prepared in the step S2 through a colloid mill, and cooling to room temperature to obtain emulsified asphalt;
s4, slowly adding the waterborne epoxy resin into the emulsified asphalt prepared in the step S3 under stirring at the rotating speed of 100-300r/min, and continuously stirring and dispersing for 10min after the addition is finished, so as to obtain the high-stability waterborne epoxy resin modified emulsified asphalt.
9. The method of claim 8, wherein: the heating and stirring in step S2 is specifically heating to 40-60 deg.C, stirring at high speed for 10-60min, and the rotation speed is 500-2000 r/min.
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| CN112480699A (en) * | 2020-12-04 | 2021-03-12 | 上海万照精细化工有限公司 | Emulsified asphalt stabilizer, emulsified asphalt and preparation method thereof |
| CN112961680A (en) * | 2021-02-07 | 2021-06-15 | 杭州圣立新材料有限公司 | Freeze-thaw-resistant soil stabilizer and preparation method thereof |
| CN114213857B (en) * | 2021-12-31 | 2023-03-10 | 宿迁东方雨虹建筑材料有限公司 | Epoxy resin modified emulsified petroleum asphalt material capable of being stored for long time and preparation method thereof |
| CN114806317B (en) * | 2022-03-17 | 2023-05-26 | 安徽欣苗新材料科技有限公司 | Container floor water-based asphalt paint and processing method thereof |
| CN115075080A (en) * | 2022-07-04 | 2022-09-20 | 南通交融建设工程有限公司 | Second-order water-based resin asphalt bonding layer construction process |
| CN115785814B (en) * | 2022-11-29 | 2024-02-09 | 北京中铁科新材料技术有限公司 | Base layer treating agent for concrete pavement or bridge deck waterproof system |
| CN115785684B (en) * | 2022-12-15 | 2024-01-30 | 河海大学 | Water-based epoxy emulsified asphalt, and preparation method and application thereof |
| CN116218325A (en) * | 2022-12-29 | 2023-06-06 | 泰州市中山涂料有限公司 | Environment-friendly water-based waterproof paint and preparation method thereof |
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| WO2013156337A1 (en) * | 2012-04-20 | 2013-10-24 | Evonik Degussa Gmbh | Reinforced epoxy resin adhesive |
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