CN114230237B - High-temperature-resistant epoxy asphalt mixture for steel bridge deck of pedestrian overpass and preparation method thereof - Google Patents
High-temperature-resistant epoxy asphalt mixture for steel bridge deck of pedestrian overpass and preparation method thereof Download PDFInfo
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- CN114230237B CN114230237B CN202111677315.6A CN202111677315A CN114230237B CN 114230237 B CN114230237 B CN 114230237B CN 202111677315 A CN202111677315 A CN 202111677315A CN 114230237 B CN114230237 B CN 114230237B
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- 239000010426 asphalt Substances 0.000 title claims abstract description 95
- 239000004593 Epoxy Substances 0.000 title claims abstract description 62
- 239000000203 mixture Substances 0.000 title claims abstract description 40
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 23
- 239000010959 steel Substances 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000003822 epoxy resin Substances 0.000 claims abstract description 28
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 28
- 239000011787 zinc oxide Substances 0.000 claims abstract description 17
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims description 69
- 238000006243 chemical reaction Methods 0.000 claims description 48
- 235000019738 Limestone Nutrition 0.000 claims description 31
- 239000006028 limestone Substances 0.000 claims description 31
- 239000003795 chemical substances by application Substances 0.000 claims description 22
- 239000000843 powder Substances 0.000 claims description 19
- 238000010438 heat treatment Methods 0.000 claims description 12
- 239000002699 waste material Substances 0.000 claims description 9
- 239000004576 sand Substances 0.000 claims description 8
- 238000005303 weighing Methods 0.000 claims description 8
- 229920003043 Cellulose fiber Polymers 0.000 claims description 7
- PXKLMJQFEQBVLD-UHFFFAOYSA-N bisphenol F Chemical compound C1=CC(O)=CC=C1CC1=CC=C(O)C=C1 PXKLMJQFEQBVLD-UHFFFAOYSA-N 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 239000004342 Benzoyl peroxide Substances 0.000 claims description 5
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 claims description 5
- 235000019400 benzoyl peroxide Nutrition 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 4
- FRPAVHFNOFSNDR-UHFFFAOYSA-N 3-(2,4-dioxo-1,3-thiazolidin-3-yl)propanoic acid Chemical compound OC(=O)CCN1C(=O)CSC1=O FRPAVHFNOFSNDR-UHFFFAOYSA-N 0.000 claims description 3
- RYYKJJJTJZKILX-UHFFFAOYSA-M sodium octadecanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCC([O-])=O RYYKJJJTJZKILX-UHFFFAOYSA-M 0.000 claims description 3
- 239000004952 Polyamide Substances 0.000 claims description 2
- -1 alicyclic amine Chemical class 0.000 claims description 2
- 125000001931 aliphatic group Chemical group 0.000 claims description 2
- 150000004982 aromatic amines Chemical class 0.000 claims description 2
- WITDFSFZHZYQHB-UHFFFAOYSA-N dibenzylcarbamothioylsulfanyl n,n-dibenzylcarbamodithioate Chemical compound C=1C=CC=CC=1CN(CC=1C=CC=CC=1)C(=S)SSC(=S)N(CC=1C=CC=CC=1)CC1=CC=CC=C1 WITDFSFZHZYQHB-UHFFFAOYSA-N 0.000 claims description 2
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims description 2
- GYZLOYUZLJXAJU-UHFFFAOYSA-N diglycidyl ether Chemical compound C1OC1COCC1CO1 GYZLOYUZLJXAJU-UHFFFAOYSA-N 0.000 claims description 2
- AFEQENGXSMURHA-UHFFFAOYSA-N oxiran-2-ylmethanamine Chemical compound NCC1CO1 AFEQENGXSMURHA-UHFFFAOYSA-N 0.000 claims description 2
- 229920002647 polyamide Polymers 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims description 2
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 2
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 238000009776 industrial production Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- SWVGZFQJXVPIKM-UHFFFAOYSA-N n,n-bis(methylamino)propan-1-amine Chemical compound CCCN(NC)NC SWVGZFQJXVPIKM-UHFFFAOYSA-N 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- QOHMWDJIBGVPIF-UHFFFAOYSA-N n',n'-diethylpropane-1,3-diamine Chemical compound CCN(CC)CCCN QOHMWDJIBGVPIF-UHFFFAOYSA-N 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 239000012044 organic layer Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- RNWHGQJWIACOKP-UHFFFAOYSA-N zinc;oxygen(2-) Chemical class [O-2].[Zn+2] RNWHGQJWIACOKP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/26—Bituminous materials, e.g. tar, pitch
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/76—Use at unusual temperatures, e.g. sub-zero
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a high-temperature-resistant epoxy asphalt mixture for a steel bridge deck of a pedestrian overpass and a preparation method thereof, wherein the asphalt mixture comprises the following raw materials in parts by weight: 4-8 parts of epoxy asphalt A part, 2-4 parts of epoxy asphalt B part, 45-69.7 parts of coarse aggregate, 7.4-15.7 parts of fine aggregate and 0.45-3 parts of accelerator, wherein the epoxy asphalt A part comprises a silane coupling agent, zinc oxide, epoxy resin and an asphalt base in a mass ratio of 2-5:3-5:10-15:100. The asphalt mixture provided by the invention has high temperature resistance and excellent mechanical strength, can be suitable for some severe working environments, and is simple in preparation method and suitable for industrial production.
Description
Technical Field
The invention belongs to the technical field of pavement materials, and particularly relates to a high-temperature-resistant epoxy asphalt mixture for a steel bridge deck of a pedestrian overpass and a preparation method thereof.
Background
At present, no unified design standard exists in China for paving the bridge deck of the pedestrian bridge, and the paving of the domestic common pedestrian bridge mainly adopts the bridge deck of the traditional municipal steel bridge to pave and adopts an ultrathin paving layer to pave. The traditional municipal steel bridge pavement needs to use paving and rolling equipment, the load in the construction process is far greater than that in the operation process, so that the steel consumption of the pedestrian bridge steel structure is obviously increased to meet the pavement construction requirement, the steel waste is serious, and the economical efficiency is poor; and has the problems of high manufacturing cost and/or low service life.
In order to overcome the defects of serious pollution, insufficient high-temperature stability and the like of the traditional pouring asphalt mixture, the epoxy asphalt is used for replacing the traditional asphalt. The epoxy asphalt has the advantages of safety, rapidness, greenness, environmental protection and the like, is suitable for various fields of bridge deck pavement, waterproof treatment and the like, and has been widely applied at home and abroad. The epoxy asphalt is utilized for researching and developing bridge deck pavement which is simple in construction, small in construction load, good in price and durable and suitable for the pavement of the pedestrian steel bridge, and a corresponding structural scheme and a design method are provided, so that the epoxy asphalt has important practical significance.
In order to reduce the occurrence of corrosion and softening of the epoxy asphalt pavement material after long-time use, the components of the epoxy asphalt pavement material need to be combined, so that the compounded epoxy asphalt pavement material is endowed with better corrosion resistance, heat resistance and ageing resistance.
Disclosure of Invention
The invention aims to provide a high-temperature-resistant epoxy asphalt mixture for a steel bridge deck of a passenger overpass and a preparation method thereof, and the asphalt mixture is used for improving the internal structure of asphalt on a microscopic level on the basis of keeping the original strength, so as to achieve the aims of improving the corrosion resistance, the high temperature resistance and the ageing resistance of asphalt.
The invention provides a high-temperature-resistant epoxy asphalt mixture for a steel bridge deck of a pedestrian overpass, which comprises the following raw materials in parts by weight: 4-8 parts of epoxy asphalt A part, 2-4 parts of epoxy asphalt B part, 45-69.7 parts of coarse aggregate, 7.4-15.7 parts of fine aggregate and 0.45-3 parts of accelerator, wherein the epoxy asphalt A part comprises a silane coupling agent, zinc oxide, epoxy resin and asphalt base in a mass ratio of 2-5:3-5:10-15:100.
Further, the epoxy asphalt B part is curing agent and/or limestone powder, wherein the mass ratio of the curing agent to the limestone powder is 1-2:1, and the curing agent comprises at least one of aliphatic amine curing agent, alicyclic amine curing agent, aromatic amine curing agent and polyamide curing agent.
Further, the coarse aggregate comprises at least one of limestone macadam, basalt macadam and diabase macadam, and the grain size of the coarse aggregate is 2.36-4.75 mm.
Further, the fine aggregate comprises limestone machine-made sand, fibers and waste rubber in a mass ratio of 90-95:2-4:1-8, the particle size of the fine aggregate is 0.15-0.3 mm, and the fibers comprise cellulose fibers or polymer chemical fibers.
Further, the accelerator is one or more of tetrabenzyl thiuram disulfide, benzoyl peroxide, sodium stearate, triethanolamine laurate and sodium bicarbonate.
Further, the epoxy resin is at least one of bisphenol a type epoxy resin, aliphatic glycidyl ether aqueous epoxy resin, bisphenol F type aqueous epoxy resin, and glycidylamine type aqueous epoxy resin.
The preparation method of the high-temperature-resistant epoxy asphalt mixture for the steel bridge deck of the pedestrian overpass comprises the following steps:
(1) Weighing coarse aggregate and fine aggregate, pouring the coarse aggregate and the fine aggregate into a stirring pot, heating and stirring to obtain an aggregate mixture;
(2) Adding asphalt into a reaction kettle, raising the temperature of the reaction kettle to 110-130 ℃, adding epoxy resin, zinc oxide and silane coupling agent into the reaction kettle after the temperature is stable, and uniformly stirring;
(3) After the temperature of the reaction kettle is raised to 135-145 ℃, adding curing agent and/or limestone powder into the reaction kettle, and uniformly stirring;
(4) Adding the aggregate mixture and the accelerator into a reaction kettle, stirring again for 2-5 h, and preserving heat and solidifying after stirring.
Further, the heating temperature in the step (1) is 110-150 ℃ and the heating time is 60-90 min.
Further, the stirring speeds of the step (2), the step (3) and the step (4) are respectively 80-140 rpm, 90-120 rpm and 80-140 rpm.
In summary, the invention has the following advantages:
1. after zinc oxide is added, the performance of the pavement material is further improved, and further, the service life of the pavement material after solidification is mainly prolonged, and more specifically, the low-temperature cracking resistance and the high-temperature softening resistance of asphalt are improved, so that the asphalt can still keep not expanding, not contracting and not cracking under extreme weather. Specifically, the zinc oxide surface modified by the silane coupling agent is coated with an organic layer, so that the compatibility with epoxy resin and asphalt is good. The modified zinc oxide particles have strong adsorption capacity, asphalt is adsorbed on the surfaces of the particles, and oil in the asphalt can enter micropores on the surfaces of the nano particles to form a mechanical locking force.
2. The siliceous limestone with low cost can effectively save the use cost and reduce the production cost of the production enterprises on the basis of ensuring the indexes such as volume density, apparent density, compressive strength, acid solubility, sphericity, roundness, particle size distribution and the like. The limestone powder is used in the curing agent, so that the limestone powder can play a role in modifying asphalt, can play a role in filling, improves the strength of asphalt, and has an effect of improving the high-temperature performance of asphalt.
Detailed Description
The principles and features of the present invention are described below in connection with the following examples, which are set forth to illustrate, but are not to be construed as limiting the scope of the invention. The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
Example 1
The embodiment provides a preparation method of a high-temperature-resistant epoxy asphalt mixture for a steel bridge deck of a pedestrian overpass, which comprises the following raw materials in parts by weight: 5.3 parts of epoxy asphalt A part, 2.7 parts of epoxy asphalt B part, 62 parts of limestone broken stone (4.0 mm), 15.7 parts of fine aggregate (0.2 mm) and 3 parts of benzoyl peroxide, wherein the epoxy asphalt A part comprises a silane coupling agent, zinc oxide, bisphenol A type epoxy resin and asphalt base in a mass ratio of 2:5:15:100, the epoxy asphalt B part comprises N, N-dimethylaminopropylamine and limestone powder in a mass ratio of 2:1, and the fine aggregate comprises limestone machine-made sand, cellulose fiber and waste rubber in a mass ratio of 90:2:8.
The preparation method comprises the following steps:
(1) Weighing coarse aggregate and fine aggregate, pouring into a stirring pot, heating to 110 ℃, and stirring for 90min to obtain an aggregate mixture;
(2) Adding asphalt into a reaction kettle, raising the temperature of the reaction kettle to 110 ℃, adding epoxy resin, zinc oxide and silane coupling agent into the reaction kettle after the temperature is stable, and uniformly stirring at a stirring speed of 90 rpm;
(3) After the temperature of the reaction kettle is increased to 135 ℃, adding a curing agent and limestone powder into the reaction kettle, and uniformly stirring at a stirring speed of 100 rpm;
(4) Adding the aggregate mixture and the accelerator into a reaction kettle, stirring again for 2 hours at the stirring speed of 90rpm, and preserving heat and solidifying after stirring.
Example 2
The embodiment provides a preparation method of a high-temperature-resistant epoxy asphalt mixture for a steel bridge deck of a pedestrian overpass, which comprises the following raw materials in parts by weight: 6 parts of epoxy asphalt A part, 3 parts of epoxy asphalt B part, 62.8 parts of coarse aggregate (2.36 mm), 14.2 parts of fine aggregate (0.15 mm) and 2 parts of triethanolamine laurate, wherein the epoxy asphalt A part comprises a silane coupling agent, zinc oxide, bisphenol F type waterborne epoxy resin and asphalt base in a mass ratio of 5:5:8:100, the epoxy asphalt B part comprises N, N-diethylaminopropylamine and limestone powder in a mass ratio of 2:1, and the fine aggregate comprises limestone machine-made sand, cellulose fiber and waste rubber in a mass ratio of 95:4:1.
The preparation method comprises the following steps:
(1) Weighing coarse aggregate and fine aggregate, pouring into a stirring pot, heating to 120 ℃, and stirring for 60min to obtain an aggregate mixture;
(2) Adding asphalt into a reaction kettle, raising the temperature of the reaction kettle to 120 ℃, adding epoxy resin, zinc oxide and silane coupling agent into the reaction kettle after the temperature is stable, and uniformly stirring at a stirring speed of 90 rpm;
(3) After the temperature of the reaction kettle is increased to 140 ℃, adding curing agent and/or limestone powder into the reaction kettle, and uniformly stirring at a stirring speed of 120 rpm;
(4) Adding the aggregate mixture and the accelerator into a reaction kettle, stirring again for 2 hours at the stirring speed of 90rpm, and preserving heat and solidifying after stirring.
Example 3
The embodiment provides a preparation method of a high-temperature-resistant epoxy asphalt mixture for a steel bridge deck of a pedestrian overpass, which comprises the following raw materials in parts by weight: 7 parts of epoxy asphalt A part, 3.5 parts of epoxy asphalt B part, 59 parts of coarse aggregate (3.0 mm), 15.5 parts of fine aggregate (0.15 mm) and 1.5 parts of sodium stearate, wherein the epoxy asphalt A part comprises a silane coupling agent, zinc oxide, epoxy resin and an asphalt base in a mass ratio of 3:3:15:100, the epoxy asphalt B part comprises diethylenetriamine and limestone powder in a mass ratio of 1:1, and the fine aggregate comprises limestone machine-made sand, cellulose fiber and waste rubber in a mass ratio of 95:4:1.
The preparation method comprises the following steps:
(1) Weighing coarse aggregate and fine aggregate, pouring into a stirring pot, heating to 150 ℃, and stirring for 60min to obtain an aggregate mixture;
(2) Adding asphalt into a reaction kettle, raising the temperature of the reaction kettle to 110 ℃, adding epoxy resin, zinc oxide and silane coupling agent into the reaction kettle after the temperature is stable, and uniformly stirring at a stirring speed of 90 rpm;
(3) After the temperature of the reaction kettle is increased to 135 ℃, adding curing agent and/or limestone powder into the reaction kettle, and uniformly stirring at a stirring speed of 120 rpm;
(4) Adding the aggregate mixture and the accelerator into a reaction kettle, stirring again, uniformly stirring at a stirring speed of 90rpm for 3 hours, and preserving heat and solidifying after stirring.
Comparative example 1
The comparative example provides a preparation method of an epoxy asphalt mixture, which comprises the following raw materials in parts by weight: 5.3 parts of epoxy asphalt A part, 2.7 parts of epoxy asphalt B part, 62 parts of coarse aggregate and 26 parts of fine aggregate, wherein the epoxy asphalt A part comprises a silane coupling agent, zinc oxide, epoxy resin and asphalt base in a mass ratio of 2:5:15:100, the epoxy asphalt B part comprises N, N-dimethylaminopropylamine and limestone powder in a mass ratio of 2:1, and the fine aggregate comprises 90 mass ratio: 10 limestone machine-made sand and waste rubber.
The preparation method comprises the following steps:
(1) Weighing coarse aggregate and fine aggregate, pouring into a stirring pot, heating to 110 ℃, and stirring for 90min to obtain an aggregate mixture;
(2) Adding asphalt into a reaction kettle, raising the temperature of the reaction kettle to 110 ℃, adding epoxy resin, zinc oxide and silane coupling agent into the reaction kettle after the temperature is stable, and uniformly stirring at a stirring speed of 90 rpm;
(3) After the temperature of the reaction kettle is increased to 135 ℃, adding a curing agent and limestone powder into the reaction kettle, and uniformly stirring at a stirring speed of 100 rpm;
(4) Adding the aggregate mixture into a reaction kettle, stirring again for 2 hours at the stirring speed of 90rpm, and preserving heat and solidifying after stirring.
Comparative example 2
The comparative example provides a preparation method of an epoxy asphalt mixture, which comprises the following raw materials in parts by weight: 5.3 parts of epoxy asphalt A part, 2.7 parts of epoxy asphalt B part, 62 parts of coarse aggregate, 26 parts of fine aggregate and 3 parts of benzoyl peroxide, wherein the epoxy asphalt A part comprises a silane coupling agent, epoxy resin and an asphalt base in a mass ratio of 2:15:100, the epoxy asphalt B part comprises N, N-dimethylaminopropylamine and limestone powder in a mass ratio of 2:1, and the fine aggregate comprises limestone machine-made sand, cellulose fiber and waste rubber in a mass ratio of 90:2:8.
The preparation method comprises the following steps:
(1) Weighing coarse aggregate and fine aggregate, pouring into a stirring pot, heating to 110 ℃, and stirring for 90min to obtain an aggregate mixture;
(2) Adding asphalt into a reaction kettle, raising the temperature of the reaction kettle to 110 ℃, adding epoxy resin and silane coupling agent into the reaction kettle after the temperature is stable, and uniformly stirring at a stirring speed of 90 rpm;
(3) After the temperature of the reaction kettle is increased to 135 ℃, adding a curing agent and limestone powder into the reaction kettle, and uniformly stirring at a stirring speed of 100 rpm;
(4) Adding the aggregate mixture and the accelerator into a reaction kettle, stirring again for 2 hours at the stirring speed of 90rpm, and preserving heat and solidifying after stirring.
Comparative example 3
The comparative example provides a preparation method of an epoxy asphalt mixture, which comprises the following raw materials in parts by weight: 5.3 parts of epoxy asphalt A part, 2.7 parts of epoxy asphalt B part, 62 parts of coarse aggregate, 26 parts of fine aggregate and 3 parts of benzoyl peroxide, wherein the epoxy asphalt A part comprises zinc oxide, epoxy resin and asphalt base in a mass ratio of 5:15:100, the epoxy asphalt B part comprises N, N-dimethylaminopropylamine and limestone powder in a mass ratio of 2:1, and the fine aggregate comprises limestone machine-made sand, cellulose fiber and waste rubber in a mass ratio of 90:2:8.
The preparation method comprises the following steps:
(1) Weighing coarse aggregate and fine aggregate, pouring into a stirring pot, heating to 110 ℃, and stirring for 90min to obtain an aggregate mixture;
(2) Adding asphalt into a reaction kettle, raising the temperature of the reaction kettle to 110 ℃, adding epoxy resin and zinc oxide into the reaction kettle after the temperature is stable, and uniformly stirring at a stirring speed of 90 rpm;
(3) After the temperature of the reaction kettle is increased to 135 ℃, adding a curing agent and limestone powder into the reaction kettle, and uniformly stirring at a stirring speed of 100 rpm;
(4) Adding the aggregate mixture and the accelerator into a reaction kettle, stirring again for 2 hours at the stirring speed of 90rpm, and preserving heat and solidifying after stirring.
The asphalt mixtures prepared in examples 1 to 3 and comparative examples 1 to 3 were subjected to road performance test, and the test results are shown in Table 1.
TABLE 1 road performance data
As can be seen from Table 1, the high-temperature-resistant epoxy asphalt mixture of the steel bridge deck of the pedestrian overpass prepared by the invention can still maintain excellent fluidity, stability, high-temperature stability and low-temperature crack resistance in the aspect of road performance; can meet the load requirement of paving the common pavement steel bridge deck.
While specific embodiments of the invention have been described in detail, it should not be construed as limiting the scope of the patent. Various modifications and variations which may be made by those skilled in the art without the creative effort are within the scope of the patent described in the claims.
Claims (5)
1. The high-temperature-resistant epoxy asphalt mixture for the steel bridge deck of the passenger overpass is characterized by comprising the following raw materials in parts by weight: 4-8 parts of epoxy asphalt A part, 2-4 parts of epoxy asphalt B part, 45-69.7 parts of coarse aggregate, 7.4-15.7 parts of fine aggregate and 0.45-3 parts of accelerator, wherein the epoxy asphalt A part comprises a silane coupling agent, zinc oxide, epoxy resin and an asphalt base in a mass ratio of 2-5:3-5:10-15:100;
the epoxy asphalt B part is curing agent and limestone powder, wherein the mass ratio of the curing agent to the limestone powder is 1-2:1, and the curing agent comprises at least one of aliphatic amine curing agent, alicyclic amine curing agent, aromatic amine curing agent and polyamide curing agent;
the coarse aggregate comprises at least one of limestone macadam, basalt macadam and diabase macadam, and the particle size of the coarse aggregate is 2.36-4.75 mm;
the fine aggregate comprises limestone machine-made sand, fibers and waste rubber in a mass ratio of 90-95:2-4:1-8, wherein the particle size of the fine aggregate is 0.15-0.3 mm, and the fibers comprise cellulose fibers or polymer chemical fibers;
the promoter is one or more of tetrabenzyl thiuram disulfide, benzoyl peroxide, sodium stearate, triethanolamine laurate and sodium bicarbonate.
2. The high temperature resistant epoxy asphalt mixture for a steel deck of a pedestrian overpass of claim 1, wherein the epoxy resin is at least one of bisphenol a type epoxy resin, aliphatic glycidyl ether aqueous epoxy resin, bisphenol F type aqueous epoxy resin, and glycidylamine type aqueous epoxy resin.
3. The preparation method of the high-temperature-resistant epoxy asphalt mixture for the steel bridge deck of the pedestrian overpass as claimed in claim 1 or 2, which is characterized by comprising the following steps:
(1) Weighing coarse aggregate and fine aggregate, pouring the coarse aggregate and the fine aggregate into a stirring pot, heating and stirring to obtain an aggregate mixture;
(2) Adding asphalt into a reaction kettle, raising the temperature of the reaction kettle to 110-130 ℃, adding epoxy resin, zinc oxide and silane coupling agent into the reaction kettle after the temperature is stable, and uniformly stirring;
(3) After the temperature of the reaction kettle is increased to 135-145 ℃, adding the epoxy asphalt B part into the reaction kettle, and uniformly stirring;
(4) And adding the aggregate mixture and the accelerator into a reaction kettle, stirring again for 2-5 h, and preserving heat and solidifying after stirring.
4. The method for preparing the high-temperature-resistant epoxy asphalt mixture for the steel bridge deck of the pedestrian overpass of claim 3, wherein the heating temperature in the step (1) is 110-150 ℃ and the heating time is 60-90 min.
5. The method for preparing the high-temperature-resistant epoxy asphalt mixture for the steel bridge deck of the pedestrian overpass as claimed in claim 3, wherein the stirring speeds of the step (2), the step (3) and the step (4) are respectively 80-140 rpm, 90-120 rpm and 80-140 rpm.
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