CN116589866A - Waterborne epoxy compound reed straw modified emulsified asphalt and preparation method and application thereof - Google Patents
Waterborne epoxy compound reed straw modified emulsified asphalt and preparation method and application thereof Download PDFInfo
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- CN116589866A CN116589866A CN202310674710.1A CN202310674710A CN116589866A CN 116589866 A CN116589866 A CN 116589866A CN 202310674710 A CN202310674710 A CN 202310674710A CN 116589866 A CN116589866 A CN 116589866A
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- asphalt
- emulsifier
- tank
- reed straw
- emulsified asphalt
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- 239000010426 asphalt Substances 0.000 title claims abstract description 181
- 239000004593 Epoxy Substances 0.000 title claims abstract description 54
- 235000014676 Phragmites communis Nutrition 0.000 title claims abstract description 52
- 239000010902 straw Substances 0.000 title claims abstract description 51
- 150000001875 compounds Chemical class 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 239000000839 emulsion Substances 0.000 claims abstract description 91
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000003822 epoxy resin Substances 0.000 claims abstract description 24
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 24
- 239000003381 stabilizer Substances 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 20
- 238000001723 curing Methods 0.000 claims abstract description 18
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 14
- 229920000388 Polyphosphate Polymers 0.000 claims abstract description 13
- 239000003365 glass fiber Substances 0.000 claims abstract description 13
- 239000003208 petroleum Substances 0.000 claims abstract description 13
- 239000001205 polyphosphate Substances 0.000 claims abstract description 13
- 235000011176 polyphosphates Nutrition 0.000 claims abstract description 13
- 239000006254 rheological additive Substances 0.000 claims abstract description 13
- 238000003756 stirring Methods 0.000 claims description 34
- 239000000084 colloidal system Substances 0.000 claims description 30
- 239000000203 mixture Substances 0.000 claims description 23
- 238000010438 heat treatment Methods 0.000 claims description 21
- 230000001105 regulatory effect Effects 0.000 claims description 19
- 238000007599 discharging Methods 0.000 claims description 14
- 239000002253 acid Substances 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 10
- 238000010008 shearing Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 4
- 125000002091 cationic group Chemical group 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 claims description 4
- 229920002907 Guar gum Polymers 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 238000005336 cracking Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000000665 guar gum Substances 0.000 claims description 3
- 229960002154 guar gum Drugs 0.000 claims description 3
- 235000010417 guar gum Nutrition 0.000 claims description 3
- 239000012875 nonionic emulsifier Substances 0.000 claims description 3
- 238000005554 pickling Methods 0.000 claims description 3
- 239000004848 polyfunctional curative Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 12
- 238000012986 modification Methods 0.000 abstract description 7
- 230000004048 modification Effects 0.000 abstract description 7
- 201000010099 disease Diseases 0.000 abstract description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 abstract description 2
- 239000004850 liquid epoxy resins (LERs) Substances 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 18
- 230000000052 comparative effect Effects 0.000 description 14
- 239000004575 stone Substances 0.000 description 11
- 239000010410 layer Substances 0.000 description 9
- 238000005299 abrasion Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 6
- 238000009863 impact test Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 239000002585 base Substances 0.000 description 2
- 230000001680 brushing effect Effects 0.000 description 2
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 238000013112 stability test Methods 0.000 description 2
- 229920002994 synthetic fiber Polymers 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 244000007853 Sarothamnus scoparius Species 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- ZBJVLWIYKOAYQH-UHFFFAOYSA-N naphthalen-2-yl 2-hydroxybenzoate Chemical compound OC1=CC=CC=C1C(=O)OC1=CC=C(C=CC=C2)C2=C1 ZBJVLWIYKOAYQH-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention relates to an aqueous epoxy compound reed straw modified emulsified asphalt, a preparation method and application thereof, which are mainly used in a pre-curing method of a road and a disposal method of road surface diseases. The emulsified asphalt mainly comprises the following raw materials: 60 parts of petroleum asphalt, 40 parts of water, 1.2-1.8 parts of reed straw, 0.4 part of emulsifier A, 0.2 part of emulsifier B, 0.2 part of stabilizer, 5-6 parts of epoxy resin emulsion, 2.5-3 parts of liquid epoxy resin curing agent, 2 parts of polyphosphate, 3 parts of glass fiber and 2 parts of rheology modifier. Compared with the prior art, the emulsified asphalt prepared by the invention greatly improves the problems of insufficient asphalt durability and rut resistance, and simultaneously gives consideration to the low-temperature performance of the emulsified asphalt during modification, thereby solving the problems of poor rut resistance and poor low-temperature plasticity of the emulsified asphalt as a protective material to the greatest extent.
Description
Technical Field
The invention relates to the technical field of processing of road asphalt, in particular to an aqueous epoxy compound reed straw modified emulsified asphalt, and a preparation method and application thereof.
Background
The emulsified asphalt is mainly applied to road engineering construction in a spraying and mixing two construction modes. Common application scenes of spray construction mainly comprise penetrating oil, sticking oil, seal oil and the like. The penetrating oil is mainly used for spraying a thin layer penetrating the surface of a non-asphalt layer such as a semi-rigid base layer and the like which are well combined with asphalt layer materials in the road paving process, and emulsified asphalt is used for the process due to good fluidity and penetrability; the spraying of the adhesive layer oil is used for well combining the old asphalt layer material and the newly paved asphalt layer material; the application of seal oil is mainly in order to fill up the space between the aggregates and separate the erosion of air and rainwater to extension road's life, common application mode has fog seal, rubble seal, fine powder seal etc. rubble seal and fine powder seal's technology, and the back forms a layer of thin layer after spraying the building stones of different particle diameters behind the emulsified asphalt on road surface again and rolling. The emulsified asphalt mixing construction process has various development, and is commonly used for the pre-maintenance of road asphalt, the prevention and treatment of pavement diseases, such as slurry seal, micro surfacing technology, cold mix asphalt mixture, cold mix asphalt regeneration technology and the like.
The emulsified asphalt is used as cementing material in construction, and the emulsified asphalt has the problems of poor binding property, low material strength, poor durability and the like after demulsification under the condition that a modified material is not added. Meanwhile, the requirements of road construction on high-grade road asphalt are higher and higher, so that the requirements on the road asphalt performance are also gradually increased. In order to solve this problem, a technique for modifying emulsified asphalt has been developed. Modification of emulsified asphalt can be classified into two types according to the modification process sequence: 1. emulsifying the matrix asphalt and then modifying the matrix asphalt by using a modifier; 2. the hot asphalt is modified and then emulsified.
In China patent with publication number of CN114395266A, the invention is named as waterborne epoxy resin modified emulsified asphalt and a preparation method thereof, an emulsified asphalt is obtained after modification by using epoxy resin emulsion, curing agent, liquid rubber and dicarboxylic acid; in China patent with publication number of CN112409806A, the invention is named as single-component waterborne epoxy SBS composite modified emulsified asphalt, wherein SBS and maleic anhydride are sequentially added into matrix asphalt to obtain maleic anhydride/SBS modified asphalt, and polyurethane and epoxy resin emulsion are then added to obtain single-component waterborne epoxy resin/SBS composite modified emulsified asphalt; the invention discloses an epoxy resin emulsifier prepared from epoxy resin/polyol diglycidyl ether-amine adduct, which improves the toughness of the epoxy resin emulsion and the compatibility with cationic emulsified asphalt.
However, the conventional emulsified asphalt has poor rut resistance and high-temperature flow resistance and poor high-low temperature durability, so that an emulsified asphalt capable of solving the problems is needed.
Disclosure of Invention
The invention aims to solve the problems and provide the waterborne epoxy compound reed straw modified emulsified asphalt, and the preparation method and application thereof, and the problems of poor rutting resistance and high-temperature flow resistance and poor high-low temperature durability of the existing emulsified asphalt can be solved by the waterborne epoxy compound reed straw modified emulsified asphalt.
In the conception process, the applicant considers that the reed straw is rich in plant fibers, and has the effects of improving the toughness of the asphalt mixture and improving the ductility of asphalt at low temperature; epoxy resin, glass fiber, rheology modifier, polyphosphate and the like have the effects of comprehensively improving the rheological property of asphalt, greatly improving the rigidity of asphalt, increasing the viscosity of asphalt and the like, can enhance the rutting deformation resistance and high-temperature flow resistance of asphalt at high temperature, modify the asphalt after compounding the components, and comprehensively improve the durability of the asphalt at high and low temperatures.
The aim of the invention is achieved by the following technical scheme:
the first object of the invention is to provide a preparation method of waterborne epoxy compound reed straw modified emulsified asphalt, which comprises the following steps:
s1: heating petroleum asphalt to a flowing state, pouring the petroleum asphalt into an asphalt tank of a colloid mill, maintaining the temperature within 140-150 ℃, regulating a reversing valve of the asphalt tank to a circulating position, then starting an asphalt pump, and setting the flow of the asphalt tank for later use;
s2: sequentially adding reed straw, polyphosphate, glass fiber and a rheology modifier into the asphalt tank in the step S1, then opening a stirring device, fully stirring and circulating until uniform mixing is achieved, and keeping the constant temperature at 140-150 ℃;
s3, preparing an emulsifier mixture in a emulsion tank of a colloid mill, wherein the emulsifier mixture comprises water, an emulsifier A, an emulsifier B and a stabilizer, starting the emulsion tank to heat, starting a stirring device, regulating a reversing valve of the emulsion tank to a circulation position, then starting an emulsion pump, and setting the flow of the emulsion tank for later use;
s4: simultaneously adjusting the emulsion tank and the asphalt tank reversing valve to a discharging position, simultaneously starting a colloid mill to perform high-speed shearing, and cooling the discharging of the colloid mill to obtain a first mixture;
s5: and (3) respectively adding the epoxy resin emulsion and the epoxy curing agent into the first mixture in the step (S4), and fully and uniformly stirring to obtain the waterborne epoxy compound reed straw modified emulsified asphalt.
Further, the specific process of step S3 is as follows:
s31: adding water into an emulsion tank of a colloid mill, setting the heating temperature to be 60 ℃, starting the emulsion tank for heating, simultaneously starting a stirring device, regulating a reversing valve of the emulsion tank to a circulation position, then starting an emulsion pump, and setting the flow of the emulsion tank for later use;
s32: and (3) when the temperature of the emulsion tank in the step (S31) is stabilized at 60 ℃, sequentially adding the emulsifier A, the emulsifier B and the stabilizer, fully stirring to completely dissolve the emulsifier A, the emulsifier B and the stabilizer, and then maintaining the pH value of the liquid in the emulsion tank at 2.0-2.5 by regulating the acid to prepare an emulsifier mixture for later use.
Further, the emulsifier a in step S32 is a fast-cracking cationic solid emulsifier; the emulsifier B in the step S32 is a nonionic emulsifier; the stabilizer in the step S32 is guar gum; the acid used in the acid adjustment in step S32 is concentrated hydrochloric acid.
Further, the petroleum asphalt in the step S1 is one of 70# asphalt or 50# asphalt.
Further, the reed straw in the step S2 is obtained by pickling reed straw to be treated, alkali washing, washing with water and drying.
Further, the epoxy resin in the step S5 is a milky white liquid with good fluidity at normal temperature.
Further, the epoxy curing agent in the step S5 is a pale yellow liquid with good fluidity at normal temperature.
Further, the high shear rate described in step S4 is 4000rpm.
Further, the weight ratio of the epoxy resin emulsion to the epoxy curing in the step S5 is: epoxy hardener=2:1.
Further, the ratio of the flow rates of the asphalt tank and the emulsion tank in the steps S1 and S3 is 3:2.
Further, the preparation method improves rutting resistance and high-temperature flow resistance of the emulsified asphalt after solidification, improves high-temperature durability and low-temperature durability of the emulsified asphalt, and the prepared emulsified asphalt has excellent and balanced high-temperature and low-temperature performance.
The invention provides aqueous epoxy compound reed straw modified emulsified asphalt which is prepared by the preparation method, and comprises the following components in parts by weight: 60 parts of petroleum asphalt; 40 parts of water; 0.4 parts of emulsifier A; 0.2 part of emulsifier B; 0.2 parts of stabilizer; reed stalk (1.2-1.8); 5-6 parts of epoxy resin emulsion; 2.5-3 parts of epoxy curing agent; 2 parts of polyphosphate; 3 parts of glass fiber; 2 parts of rheology modifier.
Optionally, the emulsified asphalt comprises the following components in parts by weight: 60 parts of petroleum asphalt; 40 parts of water; 0.4 parts of emulsifier A; 0.2 part of emulsifier B; 0.2 parts of stabilizer; 1.2 parts of reed straw; 5 parts of epoxy resin emulsion; 2.5 parts of epoxy curing agent; 2 parts of polyphosphate; 3 parts of glass fiber; 2 parts of rheology modifier.
Optionally, the emulsified asphalt comprises the following components in parts by weight: 60 parts of petroleum asphalt; 40 parts of water; 0.4 parts of emulsifier A; 0.2 part of emulsifier B; 0.2 parts of stabilizer; 1.8 parts of reed straw; 6 parts of epoxy resin emulsion; 3 parts of an epoxy curing agent; 2 parts of polyphosphate; 3 parts of glass fiber; 2 parts of rheology modifier.
The invention provides an application of the waterborne epoxy compound reed straw modified emulsified asphalt, which can be applied to road maintenance processes such as fog sealing and the like and is used in a method for pre-curing roads and disposing road surface diseases.
Compared with the prior art, the invention has the following advantages:
the preparation method of the waterborne epoxy compound reed straw modified emulsified asphalt improves rutting resistance and high-temperature flow resistance of the emulsified asphalt after solidification, improves high-temperature durability and low-temperature durability of the emulsified asphalt, and the prepared emulsified asphalt has excellent and balanced high-temperature and low-temperature properties and can be applied to road maintenance processes such as fog sealing layers and the like.
Drawings
FIG. 1 is a graph showing the falling of stones after the brush abrasion test of example 1.
FIG. 2 is a graph showing the falling of stones after the brush abrasion test of comparative example 1.
FIG. 3 is a graph showing the falling state of stones after the brush abrasion test in example 2.
FIG. 4 is a graph showing the falling-off condition of stones after the brush abrasion test of comparative example 2.
FIG. 5 is a graph showing the falling of stones after the low temperature plate impact test of example 1.
FIG. 6 is a graph showing the falling-off of stones after the low-temperature flat plate impact test of comparative example 1.
FIG. 7 is a graph showing the falling of stones after the low temperature plate impact test of example 2.
FIG. 8 is a graph showing the falling of stones after the low-temperature flat plate impact test of comparative example 2.
Detailed Description
The invention will now be described in detail with reference to the drawings and specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present invention.
The preparation method of the water-based epoxy compound reed straw modified emulsified asphalt comprises the following specific steps:
s1: heating petroleum asphalt to a flowing state, pouring the petroleum asphalt into an asphalt tank of a colloid mill, maintaining the temperature within 140-150 ℃, regulating a reversing valve of the asphalt tank to a circulating position, then starting an asphalt pump, and setting the flow of the asphalt tank for later use;
s2: sequentially adding reed straw, polyphosphate, glass fiber and a rheology modifier into the asphalt tank in the step S1, then opening a stirring device, fully stirring and circulating until uniform mixing is achieved, and keeping the temperature at 140-150 ℃;
s3: adding water into an emulsion tank of a colloid mill, setting the heating temperature to be 60 ℃, starting the emulsion tank for heating, simultaneously starting a stirring device, regulating a reversing valve of the emulsion tank to a circulation position, then starting an emulsion pump, and setting the flow of the emulsion tank for later use;
s4: when the temperature of the emulsion tank in the step S3 is stabilized at about 60 ℃, sequentially adding an emulsifier A, an emulsifier B and a stabilizer, fully stirring to completely dissolve the emulsion, and then maintaining the pH value of the liquid in the emulsion tank at about 2.0-2.5 for later use by regulating acid;
s5: simultaneously adjusting the emulsion tank and the asphalt tank reversing valve to a discharging position, simultaneously starting a colloid mill to perform high-speed shearing, and cooling the discharging of the colloid mill to obtain a first mixture;
s6: the first mixture in S5 is mixed with an epoxy resin emulsion: epoxy resin emulsion and epoxy curing agent are respectively added in the ratio of epoxy curing agent=2:1, and the waterborne epoxy compound reed straw modified emulsified asphalt is obtained after the mixture is fully and uniformly stirred.
In the technical scheme, the characteristics of preparation means, materials, structures or composition ratios and the like which are not explicitly described are regarded as common technical characteristics disclosed in the prior art.
In the following embodiments of the present invention, the petroleum asphalt is 70# asphalt, produced by Ningbo SK Bao Ying asphalt storage Co., ltd; the emulsifier A is a quick-cracking cationic solid emulsifier, the model is 4819, and the emulsifier A is produced by Acropenobell; the emulsifier B is a nonionic emulsifier, and the model is Berol 611, manufactured by Account Sunobel company; the stabilizer is guar gum, which is produced by Nantong Guangrun New Material technology Co., ltd; the reed straw is obtained by pickling the purchased dry reed straw, then alkali washing, washing with water and drying; the model of the epoxy resin emulsion is 0916A-50W, and is produced by Nantong star synthetic materials limited company; the epoxy hardener is 0916B-55W, manufactured by Nantong star synthetic materials Co., ltd; the polyphosphate is P815555, manufactured by Michelin corporation; the glass fiber model is BLXW01, and is produced by Changzhou market super engineering materials Co., ltd; the model of the rheology modifier is NY-9421, which is produced by Guangdong Noyi chemical industry Co., ltd, and the rest raw materials are available in the market.
Example 1
The embodiment provides an aqueous epoxy compound reed straw modified emulsified asphalt, which comprises the following components in parts by weight:
70# asphalt: 1200g; 800g of water, 8 g of an emulsifier A, 4g of an emulsifier B and 4g of a stabilizer; 24g of reed straw, 40g of polyphosphate, 60g of glass fiber and 40g of rheology modifier; 100g of epoxy resin emulsion and 50g of epoxy curing agent.
The preparation method of the waterborne epoxy compound reed straw modified emulsified asphalt comprises the following steps:
s1: heating 70# asphalt to a flowing state, pouring the asphalt into an asphalt tank of a colloid mill, maintaining the temperature within 140-150 ℃, adjusting a reversing valve of the asphalt tank to a circulating position, and then starting an asphalt pump and setting the flow of the asphalt tank for later use;
s2: sequentially adding reed straw, polyphosphate, glass fiber and a rheology modifier into the asphalt tank in the step S1, then opening a stirring device, fully stirring and circulating until uniform mixing is achieved, and keeping the temperature at 140-150 ℃;
s3: adding water into an emulsion tank of a colloid mill, setting the heating temperature to be 60 ℃, starting the emulsion tank for heating, simultaneously starting a stirring device, regulating a reversing valve of the emulsion tank to a circulation position, then starting an emulsion pump, and setting the flow of the emulsion tank for later use;
s4: when the temperature of the emulsion tank in the step S3 is stabilized at about 60 ℃, sequentially adding an emulsifier A, an emulsifier B and a stabilizer, fully stirring to completely dissolve the emulsion, and then maintaining the pH value of the liquid in the emulsion tank at about 2.0-2.5 for later use by regulating acid;
s5: simultaneously adjusting the emulsion tank and the asphalt tank reversing valve to a discharging position, simultaneously starting a colloid mill to perform high-speed shearing, and cooling the discharging of the colloid mill to obtain a first mixture;
s6: and (3) respectively adding the epoxy resin emulsion and the epoxy curing agent into the first mixture in the step (S5), and fully and uniformly stirring to obtain the waterborne epoxy compound reed straw modified emulsified asphalt.
The high Wen Saoshua endurance test and the low-temperature impact endurance test are respectively carried out on the water-based epoxy compound reed straw modified emulsified asphalt in the embodiment, and the related results are shown in fig. 1 and 5.
Example 2
The embodiment provides an aqueous epoxy compound reed straw modified emulsified asphalt, which comprises the following components in parts by weight:
50# asphalt: 1200g; 800g of water, 8 g of an emulsifier A, 4g of an emulsifier B and 4g of a stabilizer; 36g of reed straw, 40g of polyphosphate, 60g of glass fiber, 40g of rheological modifier, 120g of epoxy resin emulsion and 60g of epoxy curing agent.
The preparation method of the waterborne epoxy compound reed straw modified emulsified asphalt comprises the following steps:
s1: heating 50# asphalt to a flowing state, pouring the asphalt into an asphalt tank of a colloid mill, maintaining the temperature within 140-150 ℃, adjusting a reversing valve of the asphalt tank to a circulating position, and then starting an asphalt pump and setting the flow of the asphalt tank for later use;
s2: sequentially adding reed straw, polyphosphate, glass fiber and a rheology modifier into the asphalt tank in the step S1, then opening a stirring device, fully stirring and circulating until uniform mixing is achieved, and keeping the temperature at 140-150 ℃;
s3: adding water into an emulsion tank of a colloid mill, setting the heating temperature to be 60 ℃, starting the emulsion tank for heating, simultaneously starting a stirring device, regulating a reversing valve of the emulsion tank to a circulation position, then starting an emulsion pump, and setting the flow of the emulsion tank for later use;
s4: when the temperature of the emulsion tank in the step S3 is stabilized at about 60 ℃, sequentially adding an emulsifier A, an emulsifier B and a stabilizer, fully stirring to completely dissolve the emulsion, and then maintaining the pH value of the liquid in the emulsion tank at about 2.0-2.5 for later use by regulating acid;
s5: simultaneously adjusting the emulsion tank and the asphalt tank reversing valve to a discharging position, simultaneously starting a colloid mill to perform high-speed shearing, and cooling the discharging of the colloid mill to obtain a first mixture;
s6: and (3) respectively adding the epoxy resin emulsion and the epoxy curing agent into the first mixture in the step (S5), and fully and uniformly stirring to obtain the waterborne epoxy compound reed straw modified emulsified asphalt.
The high Wen Saoshua endurance test and the low-temperature impact endurance test are respectively carried out on the water-based epoxy compound reed straw modified emulsified asphalt in the embodiment, and the related results are shown in fig. 3 and 7.
Comparative example 1
The comparative example provides an emulsified 70# asphalt comprising the following components by weight:
70# asphalt: 1200g; 800g of water, 8 g of emulsifier A, 4g of emulsifier B and 4g of stabilizer.
The preparation method of the emulsified 70# asphalt comprises the following steps:
s1: heating 70# asphalt to a flowing state, pouring the asphalt into an asphalt tank of a colloid mill, maintaining the temperature within 140-150 ℃, adjusting a reversing valve of the asphalt tank to a circulating position, and then starting an asphalt pump and setting the flow rate of the asphalt tank to be 135 for later use;
s2: turning on the stirring device of the asphalt tank, fully stirring and circulating, and keeping the constant temperature at 140-150 ℃;
s3: adding water into an emulsion tank of a colloid mill, setting the heating temperature to be 60 ℃, starting the emulsion tank for heating, simultaneously starting a stirring device, regulating a reversing valve of the emulsion tank to a circulation position, then starting an emulsion pump, and setting the flow rate of the emulsion tank to be 90 for later use;
s4: when the temperature of the emulsion tank in the step S3 is stabilized at about 60 ℃, sequentially adding an emulsifier A, an emulsifier B and a stabilizer, fully stirring to completely dissolve the emulsion, and then maintaining the pH value of the liquid in the emulsion tank at about 2.0-2.5 for later use by regulating acid;
s5: and simultaneously adjusting the emulsion tank and the asphalt tank reversing valve to a discharging position, simultaneously starting a colloid mill to perform high-speed shearing, and cooling the discharging material of the colloid mill to obtain the emulsified 70# asphalt.
The emulsified 70# asphalt in this comparative example was subjected to a high Wen Saoshua endurance test and a low temperature impact endurance test, respectively, and the results thereof are shown in fig. 2 and 6.
Comparative example 2
The comparative example provides an emulsified 50# asphalt comprising the following components by weight:
70# asphalt: 1200g; 800g of water, 8 g of emulsifier A, 4g of emulsifier B and 4g of stabilizer.
The preparation method of the emulsified 50# asphalt comprises the following steps:
s1: heating 50# asphalt to a flowing state, pouring the asphalt into an asphalt tank of a colloid mill, maintaining the temperature within 140-150 ℃, adjusting a reversing valve of the asphalt tank to a circulating position, and then starting an asphalt pump and setting the flow rate of the asphalt tank to be 135 for later use;
s2: turning on the stirring device of the asphalt tank, fully stirring and circulating, and keeping the constant temperature at 140-150 ℃;
s3: adding water into an emulsion tank of a colloid mill, setting the heating temperature to be 60 ℃, starting the emulsion tank for heating, simultaneously starting a stirring device, regulating a reversing valve of the emulsion tank to a circulation position, then starting an emulsion pump, and setting the flow rate of the emulsion tank to be 90 for later use;
s4: when the temperature of the emulsion tank in the step S3 is stabilized at about 60 ℃, sequentially adding an emulsifier A, an emulsifier B and a stabilizer, fully stirring to completely dissolve the emulsion, and then maintaining the pH value of the liquid in the emulsion tank at about 2.0-2.5 for later use by regulating acid;
s5: and simultaneously adjusting the emulsion tank and the asphalt tank reversing valve to a discharging position, simultaneously starting a colloid mill to perform high-speed shearing, and cooling the discharging material of the colloid mill to obtain the emulsified 50# asphalt.
The emulsified base asphalt in this comparative example was subjected to a high Wen Saoshua endurance test and a low-temperature impact endurance test, respectively, and the results thereof are shown in fig. 4 and 8.
The products obtained in examples 1 to 2 and comparative examples 1 to 2 were subjected to an emulsified asphalt brushing abrasion test, an emulsified asphalt Vialit plate impact test, and an emulsified asphalt storage stability test. Wherein, an emulsified asphalt sweeping abrasion experiment is designed on the basis of the test method ASTM American society for testing materials standard D7000-11, and the experimental condition is water bath at 60 ℃; in the experimental method T0660-200, hot asphalt is used for testing the low-temperature adhesion of asphalt and aggregate, and a flat impact experiment suitable for emulsified asphalt is designed on the basis of the experimental method, wherein the experimental condition is 15 ℃ water bath; the storage stability test was carried out according to the method T0655-1993 in JTG E20-2011, highway engineering asphalt and mixture test procedure. The test result data of examples 1-2 and comparative examples 1-2 are shown in Table 1; as can be seen by comparing fig. 1 with fig. 2 and comparing fig. 3 with fig. 4, the water-based epoxy modified emulsified asphalt provided by the invention does not have obvious stone falling after high-temperature brushing; as can be seen from comparison between fig. 5 and fig. 6 and comparison between fig. 7 and fig. 8, the aqueous epoxy modified emulsified asphalt provided by the invention also has a lower stone drop rate after a low-temperature impact test, and the test result shows that the aqueous epoxy compound reed straw modified emulsified asphalt and the preparation method thereof provided by the invention have obvious lifting effect on the high Wen Saoshua test for improving the emulsified asphalt and the low-temperature impact evaluation compared with the original emulsified asphalt, and have good storage stability and obvious improving effect.
Table 1 table of experimental results.
| Broom abrasion loss rate/% | Plate impact loss rate/% | Storage stability (5 days)/% | |
| Example 1 | 33.9 | 80.5 | 2.9 |
| Example 2 | 22.9 | 81.5 | 3.5 |
| Comparative example 1 | 48.5 | 98.0 | 2.2 |
| Comparative example 2 | 47.7 | 98.0 | 3.3 |
The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present invention. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above-described embodiments, and those skilled in the art, based on the present disclosure, should make improvements and modifications without departing from the scope of the present invention.
Claims (10)
1. The preparation method of the waterborne epoxy compound reed straw modified emulsified asphalt is characterized by comprising the following steps of:
s1: heating petroleum asphalt to a flowing state, pouring the petroleum asphalt into an asphalt tank of a colloid mill, maintaining the temperature within 140-150 ℃, regulating a reversing valve of the asphalt tank to a circulating position, then starting an asphalt pump, and setting the flow of the asphalt tank for later use;
s2: sequentially adding reed straw, polyphosphate, glass fiber and a rheology modifier into the asphalt tank in the step S1, then opening a stirring device, fully stirring and circulating until uniform mixing is achieved, and keeping the constant temperature at 140-150 ℃;
s3, preparing an emulsifier mixture in a emulsion tank of a colloid mill, wherein the emulsifier mixture comprises water, an emulsifier A, an emulsifier B and a stabilizer, starting the emulsion tank to heat, starting a stirring device, regulating a reversing valve of the emulsion tank to a circulation position, then starting an emulsion pump, and setting the flow of the emulsion tank for later use;
s4: simultaneously adjusting the emulsion tank and the asphalt tank reversing valve to a discharging position, simultaneously starting a colloid mill to perform high-speed shearing, and cooling the discharging of the colloid mill to obtain a first mixture;
s5: and (3) respectively adding the epoxy resin emulsion and the epoxy curing agent into the first mixture in the step (S4), and fully and uniformly stirring to obtain the waterborne epoxy compound reed straw modified emulsified asphalt.
2. The preparation method of the waterborne epoxy compound reed straw modified emulsified asphalt according to claim 1, wherein the specific process of the step S3 is as follows:
s31: adding water into an emulsion tank of a colloid mill, setting the heating temperature to be 60 ℃, starting the emulsion tank for heating, simultaneously starting a stirring device, regulating a reversing valve of the emulsion tank to a circulation position, then starting an emulsion pump, and setting the flow of the emulsion tank for later use;
s32: and (3) when the temperature of the emulsion tank in the step (S31) is stabilized at 60 ℃, sequentially adding the emulsifier A, the emulsifier B and the stabilizer, fully stirring to completely dissolve the emulsifier A, the emulsifier B and the stabilizer, and then maintaining the pH value of the liquid in the emulsion tank at 2.0-2.5 by regulating the acid to prepare an emulsifier mixture for later use.
3. The method for preparing the waterborne epoxy compound reed straw modified emulsified asphalt according to claim 2, wherein the emulsifier A in the step S32 is a fast-cracking cationic solid emulsifier;
the emulsifier B in the step S32 is a nonionic emulsifier;
the stabilizer in the step S32 is guar gum;
the acid used in the acid adjustment in step S32 is concentrated hydrochloric acid.
4. The method for preparing the waterborne epoxy compound reed straw modified emulsified asphalt according to claim 1, wherein the petroleum asphalt in the step S1 is one of 70# asphalt or 50# asphalt.
5. The method for preparing the modified emulsified asphalt with the water-based epoxy composite reed straw according to claim 1, wherein the reed straw in the step S2 is obtained by pickling reed straw to be treated, alkali washing, washing with water and drying.
6. The method for preparing the aqueous epoxy compound reed straw modified emulsified asphalt according to claim 1, wherein the high-speed shearing rate in the step S4 is 4000rpm.
7. The method for preparing the aqueous epoxy compound reed straw modified emulsified asphalt according to claim 1, wherein the weight ratio of the epoxy resin emulsion to the epoxy curing in the step S5 is: epoxy hardener=2:1.
8. The method for preparing the waterborne epoxy compound reed straw modified emulsified asphalt according to claim 1, wherein the flow ratio of the asphalt tank to the emulsion tank in the steps S1 and S3 is 3:2.
9. An aqueous epoxy compound reed straw modified emulsified asphalt prepared by the preparation method according to any one of claims 1 to 8, which is characterized by comprising the following components in parts by weight:
10. the use of the aqueous epoxy compound reed straw modified emulsified asphalt prepared by the preparation method according to any one of claims 1 to 8, wherein the aqueous epoxy compound reed straw modified emulsified asphalt is used in a road maintenance process.
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