CN115594443A - Epoxy asphalt mixture and preparation method thereof - Google Patents
Epoxy asphalt mixture and preparation method thereof Download PDFInfo
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- CN115594443A CN115594443A CN202110781824.7A CN202110781824A CN115594443A CN 115594443 A CN115594443 A CN 115594443A CN 202110781824 A CN202110781824 A CN 202110781824A CN 115594443 A CN115594443 A CN 115594443A
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- 239000010426 asphalt Substances 0.000 title claims abstract description 138
- 239000000203 mixture Substances 0.000 title claims abstract description 109
- 239000004593 Epoxy Substances 0.000 title claims abstract description 95
- 238000002360 preparation method Methods 0.000 title claims abstract description 27
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 56
- 239000003822 epoxy resin Substances 0.000 claims abstract description 48
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 48
- 239000004575 stone Substances 0.000 claims abstract description 22
- 239000000843 powder Substances 0.000 claims description 59
- 238000003756 stirring Methods 0.000 claims description 40
- 229920001971 elastomer Polymers 0.000 claims description 39
- 239000005060 rubber Substances 0.000 claims description 39
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 31
- 239000011707 mineral Substances 0.000 claims description 31
- 239000003085 diluting agent Substances 0.000 claims description 21
- 238000002156 mixing Methods 0.000 claims description 16
- 239000002699 waste material Substances 0.000 claims description 14
- 229920005989 resin Polymers 0.000 claims description 12
- 239000011347 resin Substances 0.000 claims description 12
- 235000019738 Limestone Nutrition 0.000 claims description 11
- 239000006028 limestone Substances 0.000 claims description 11
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 8
- AOBIOSPNXBMOAT-UHFFFAOYSA-N 2-[2-(oxiran-2-ylmethoxy)ethoxymethyl]oxirane Chemical compound C1OC1COCCOCC1CO1 AOBIOSPNXBMOAT-UHFFFAOYSA-N 0.000 claims description 7
- UHESRSKEBRADOO-UHFFFAOYSA-N ethyl carbamate;prop-2-enoic acid Chemical compound OC(=O)C=C.CCOC(N)=O UHESRSKEBRADOO-UHFFFAOYSA-N 0.000 claims description 7
- 229920001451 polypropylene glycol Polymers 0.000 claims description 7
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 6
- 150000004982 aromatic amines Chemical class 0.000 claims description 6
- 229920000459 Nitrile rubber Polymers 0.000 claims description 5
- 239000010438 granite Substances 0.000 claims description 5
- SHKUUQIDMUMQQK-UHFFFAOYSA-N 2-[4-(oxiran-2-ylmethoxy)butoxymethyl]oxirane Chemical compound C1OC1COCCCCOCC1CO1 SHKUUQIDMUMQQK-UHFFFAOYSA-N 0.000 claims description 3
- WTYYGFLRBWMFRY-UHFFFAOYSA-N 2-[6-(oxiran-2-ylmethoxy)hexoxymethyl]oxirane Chemical compound C1OC1COCCCCCCOCC1CO1 WTYYGFLRBWMFRY-UHFFFAOYSA-N 0.000 claims description 3
- 239000004925 Acrylic resin Substances 0.000 claims description 3
- 239000004952 Polyamide Substances 0.000 claims description 3
- 239000004359 castor oil Substances 0.000 claims description 3
- 235000019438 castor oil Nutrition 0.000 claims description 3
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims description 3
- GYZLOYUZLJXAJU-UHFFFAOYSA-N diglycidyl ether Chemical compound C1OC1COCC1CO1 GYZLOYUZLJXAJU-UHFFFAOYSA-N 0.000 claims description 3
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 claims description 3
- 229920002647 polyamide Polymers 0.000 claims description 3
- 150000008064 anhydrides Chemical class 0.000 claims description 2
- LRKCARSPGSPXAO-UHFFFAOYSA-N propane-1,2,3-triol;propan-1-ol Chemical compound CCCO.OCC(O)CO LRKCARSPGSPXAO-UHFFFAOYSA-N 0.000 claims description 2
- PXKLMJQFEQBVLD-UHFFFAOYSA-N bisphenol F Chemical compound C1=CC(O)=CC=C1CC1=CC=C(O)C=C1 PXKLMJQFEQBVLD-UHFFFAOYSA-N 0.000 claims 2
- 239000000539 dimer Substances 0.000 claims 1
- 238000012360 testing method Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 6
- MWSKJDNQKGCKPA-UHFFFAOYSA-N 6-methyl-3a,4,5,7a-tetrahydro-2-benzofuran-1,3-dione Chemical compound C1CC(C)=CC2C(=O)OC(=O)C12 MWSKJDNQKGCKPA-UHFFFAOYSA-N 0.000 description 5
- 239000004841 bisphenol A epoxy resin Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 230000001588 bifunctional effect Effects 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000007580 dry-mixing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerol Natural products OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- -1 aliphatic acid anhydride Chemical class 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- HSDVRWZKEDRBAG-UHFFFAOYSA-N 2-[1-(oxiran-2-ylmethoxy)hexoxymethyl]oxirane Chemical compound C1OC1COC(CCCCC)OCC1CO1 HSDVRWZKEDRBAG-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 150000008065 acid anhydrides Chemical class 0.000 description 1
- 239000004844 aliphatic epoxy resin Substances 0.000 description 1
- 239000011384 asphalt concrete Substances 0.000 description 1
- NTXGQCSETZTARF-UHFFFAOYSA-N buta-1,3-diene;prop-2-enenitrile Chemical compound C=CC=C.C=CC#N NTXGQCSETZTARF-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 238000013101 initial test Methods 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 description 1
- 239000003981 vehicle Substances 0.000 description 1
- 239000010920 waste tyre Substances 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/18—Waste materials; Refuse organic
- C04B18/20—Waste materials; Refuse organic from macromolecular compounds
- C04B18/22—Rubber, e.g. ground waste tires
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/2652—Nitrogen containing polymers, e.g. polyacrylamides, polyacrylonitriles
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/2676—Polystyrenes
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/28—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/281—Polyepoxides
Abstract
The invention relates to an epoxy asphalt mixture, which consists of an asphalt component, an epoxy resin component, a curing agent component and a stone mixture, wherein the weight ratio of the components is as follows: 2-5 parts of asphalt component, (2) 1-3.5 parts of epoxy resin component, (3) 0.6-2.5 parts of curing agent component, and (4) 100 parts of stone mixture. The invention also relates to a preparation method of the epoxy asphalt mixture. The epoxy asphalt mixture provided by the invention can solve the problem of poor flexibility of the epoxy asphalt mixture, and has good dynamic stability and flexibility.
Description
Technical Field
The invention belongs to the technical field of pavement, and particularly relates to an epoxy asphalt mixture for pavement and a preparation method thereof.
Background
In the epoxy asphalt mixture, the cementing material is a composite material of asphalt, epoxy resin and an epoxy curing agent, and when the epoxy asphalt mixture is used on site, the composite material is respectively metered and uniformly mixed, and then the mixture and stone are put into a mixture mixing cylinder together to prepare the epoxy asphalt mixture. The strength of the epoxy asphalt mixture is very high, and under the condition that the general initial dynamic stability meets the specified value, the strength of the epoxy asphalt mixture can be continuously increased along with the increase of time, but the toughness of the epoxy asphalt mixture is poor, and even the use requirement is difficult to meet. Therefore, the epoxy asphalt mixture has disadvantages of poor durability and poor toughness.
In the current epoxy asphalt technology, the toughening of the epoxy asphalt is the focus of research. The method comprises the steps of firstly improving the toughness of the epoxy resin, such as adopting aliphatic epoxy resin, secondly adopting a tough epoxy curing agent, such as long-chain aliphatic acid anhydride, and thirdly modifying the whole epoxy asphalt, such as adopting SBS, styrene butadiene rubber, nitrile butadiene rubber, waste rubber powder, polybutadiene resin and other modified epoxy asphalt. In fact, the use of vulcanized powdered rubber modified asphalt or modified epoxy resin is a good method for improving toughness. The waste rubber vulcanized powder rubber modified asphalt is a method for applying the vulcanized powder rubber of crushed waste tires to pavement, and is mature at present. Fully vulcanized powdered styrene-butadiene rubber modified asphalt has also been tried by researchers. The vulcanized powdered rubber-modified epoxy resin can also provide the impact strength, heat resistance, etc. of the epoxy resin. Therefore, the vulcanized powder rubber, the asphalt and the epoxy resin have good compatibility, and are suitable for improving the toughness of the epoxy asphalt. CN 102516783A waste rubber powder is added into epoxy asphalt, the asphalt is modified, and then the asphalt is mixed with epoxy resin to prepare the epoxy asphalt. CN 104592775B activates the waste rubber powder and then adds the waste rubber powder into the epoxy asphalt, and also firstly modifies the asphalt and then mixes the asphalt with the epoxy resin to prepare the epoxy asphalt. However, the above preparation processes are complicated, the waste rubber powder needs to be added into the asphalt in advance for modification, and the waste rubber powder needs to be sheared and stirred for a long time, so that the production is difficult and the waste rubber powder is difficult to be uniformly mixed.
In the prior art, the waste rubber powder needs to be added into the asphalt in advance for modification, and needs to be sheared and stirred for a long time, so that the production process is complex; in addition, the waste rubber powder has a large mesh size (20 to 80 mesh size), and is difficult to disperse uniformly.
Disclosure of Invention
Based on the above, the invention aims to provide an epoxy asphalt mixture and a preparation method thereof, wherein the epoxy asphalt mixture can solve the problem of poor flexibility of the epoxy asphalt mixture and has better dynamic stability and flexibility; in addition, the epoxy resin component and the curing agent component in the preparation method do not need to be mixed in advance, and are directly mixed, so that the preparation method is simple and easy to operate.
Therefore, the invention provides an epoxy asphalt mixture which comprises an asphalt component, an epoxy resin component, a curing agent component and a stone mixture, wherein the mass ratio of the components is as follows:
the epoxy asphalt mixture of the invention is preferably prepared from the following components in percentage by mass:
(1) 70-90 parts of epoxy resin,
(2) 5 to 15 parts of active diluent, namely,
(3) 5-15 parts of modified resin.
The epoxy asphalt mixture of the present invention is preferably an epoxy diluent with two or more functional groups, and more preferably the epoxy diluent is one of 1,6 hexanediol diglycidyl ether, 1,4 butanediol diglycidyl ether, polypropylene glycol diglycidyl ether, glycerol propoxy triglycidyl ether, and castor oil glycidyl ether.
The epoxy asphalt mixture of the invention is preferably that the modified resin is one of monofunctional, bifunctional or polyfunctional urethane acrylate resin.
The epoxy asphalt mixture of the invention is preferably prepared from the following components in parts by mass:
(1) 50-90 parts of a curing agent,
(2) 10-50 parts of vulcanized powdered rubber.
The epoxy asphalt mixture of the invention is preferably prepared by using one or more of aliphatic amine curing agent, aromatic amine curing agent, polyamide curing agent and anhydride curing agent as the curing agent.
The epoxy asphalt mixture of the invention is preferably prepared by selecting at least one of vulcanized powdered styrene-butadiene rubber, vulcanized powdered nitrile rubber and waste rubber powder vulcanized powdered rubber, and further preferably 100-300 meshes of vulcanized powdered rubber, so that the rubber powder is more uniformly dispersed and is not easy to separate.
The epoxy asphalt mixture of the invention is preferably composed of No. 50 asphalt, no. 70 asphalt, no. 90 asphalt and one of SBS I modified asphalt with performance meeting JTG F40-2004 standard requirements, and more preferably No. 70 asphalt.
The epoxy asphalt mixture of the invention is preferably characterized in that the stone mixture consists of aggregate and mineral powder, the aggregate is one of basalt, limestone, granite or diabase, and the mineral powder is limestone mineral powder. The stone mixture can be a mixture composed of various compact states and various gradations and comprises AC, SMA, OGFC, EA and the like; further preferably, the aggregate and the mineral powder are classified into EA-10, AC-13, SMA-13, OGFC-10 or AC-20.
The epoxy asphalt mixture of the invention is preferably that the aggregate in the stone mixture accounts for 88 to 98 parts by mass, and the addition amount of the mineral powder is 2 to 12 parts by mass.
Therefore, the invention also provides a preparation method of the epoxy asphalt mixture, which comprises the following steps:
(1) Preparation of epoxy resin component: adding the active diluent into the epoxy resin, stirring for 0.5-1 h, adding the modified resin, and stirring for 0.5-1 h for later use, wherein the stirring speed is 300-500 r/min;
(2) Preparation of a curing agent component: adding vulcanized powdered rubber into a curing agent, stirring at the speed of 100-200 r/min for 1-2 h, and then stirring at the speed of 300-500 r/min for 0.5-1 h for later use;
(3) Preparing an epoxy asphalt mixture: the aggregate is dry-mixed for 3 to 20 seconds, added with the asphalt component and wet-mixed for 5 to 10 seconds at the temperature of between 120 and 170 ℃, then added with the epoxy resin component, the curing agent component and the mineral powder and wet-mixed for 20 to 50 seconds, and the epoxy asphalt mixture is obtained after even mixing.
The invention has the following effects:
(1) The epoxy asphalt mixture provided by the invention can solve the problem of poor flexibility of the epoxy asphalt mixture, and has good dynamic stability and flexibility.
(2) According to the epoxy asphalt mixture provided by the invention, vulcanized powder rubber in the curing agent can be melted into a fluid state under the action of high temperature, and forms a uniform whole with epoxy resin, asphalt and stone, so that the flexibility of the epoxy asphalt mixture is improved.
(3) According to the preparation method of the epoxy asphalt mixture, provided by the invention, during actual on-site production, the asphalt component and the aggregate are mixed, and then the epoxy resin component and the curing agent component are respectively put into the mixed materials, so that the epoxy asphalt mixture can be prepared, and the production process is simplified.
Detailed Description
The following examples illustrate the invention in detail: the present example is carried out on the premise of the technical scheme of the present invention, and detailed embodiments and processes are given, but the scope of the present invention is not limited to the following examples, and experimental methods without specific conditions noted in the following examples are generally performed under conventional conditions.
The epoxy asphalt mixture provided by the invention comprises an asphalt component, an epoxy resin component, a curing agent component and a stone mixture, wherein the mass ratio of the components is as follows:
in some embodiments, it is preferable that the epoxy resin component consists of an epoxy resin, a reactive diluent, and a toughening resin in the following composition ratio by mass:
(1) 70-90 parts of epoxy resin,
(2) 5 to 15 parts of active diluent, namely,
(3) 5-15 parts of modified resin.
In some embodiments, it is preferred that the reactive diluent is a difunctional or multifunctional epoxy diluent, and even more preferred that the epoxy diluent is one of 1,6 hexanediol diglycidyl ether, 1,4 butanediol diglycidyl ether, polypropylene glycol diglycidyl ether, glycerol propoxide triglycidyl ether, castor oil glycidyl ether.
In some embodiments, it is preferred that the modifying resin is one of a monofunctional, difunctional or multifunctional urethane acrylate resin.
In some embodiments, it is preferred that the curative component consists of curative and vulcanized powder rubber, the mass of which composition is as follows:
(1) 50-90 parts of a curing agent,
(2) 10-50 parts of vulcanized powdered rubber.
In some embodiments, it is preferable that the curing agent is one or more of aliphatic amine curing agent, aromatic amine curing agent, polyamide curing agent, and acid anhydride curing agent.
In some embodiments, it is preferable that the vulcanized powder rubber is at least one selected from the group consisting of vulcanized powder styrene-butadiene rubber, vulcanized powder nitrile rubber and waste rubber powder vulcanized powder rubber, and it is further preferable that the vulcanized powder rubber is 100 to 300 mesh.
In some embodiments, the asphalt component is preferably one of No. 50 asphalt, no. 70 asphalt, no. 90 asphalt, SBS type I modified asphalt with performance meeting JTG F40-2004 specification requirements, and more preferably No. 70 asphalt.
In some embodiments, it is preferred that the stone mixture is composed of an aggregate, which is one of basalt, limestone, granite, or diabase, and a mineral powder, which is limestone mineral powder. The stone mixture can be a mixture composed of various compact states and various gradations and comprises AC, SMA, OGFC, EA and the like; further preferably, the aggregate and the mineral powder are classified into EA-10, AC-13, SMA-13, OGFC-10 or AC-20.
In some embodiments, it is preferable that the aggregate is 88-98 parts by mass and the mineral powder is added in an amount of 2-12 parts by mass.
Therefore, the preparation method of the epoxy asphalt mixture provided by the invention comprises the following steps:
(1) Preparation of epoxy resin component: adding the active diluent into the epoxy resin, stirring for 0.5-1 h, adding the modified resin, and stirring for 0.5-1 h for later use, wherein the stirring speed is 300-500 r/min;
(2) Preparing a curing agent component: adding vulcanized powdered rubber into a curing agent, stirring at the speed of 100-200 r/min for 1-2 h, and then stirring at the speed of 300-500 r/min for 0.5-1 h for later use;
(3) Preparing an epoxy asphalt mixture: the aggregate is dry-mixed for 3 to 20 seconds, added with the asphalt component and wet-mixed for 5 to 10 seconds at the temperature of between 120 and 170 ℃, then added with the epoxy resin component, the curing agent component and the mineral powder and wet-mixed for 20 to 50 seconds, and the epoxy asphalt mixture is obtained after uniform mixing.
Example 1
(1) Preparation of epoxy resin component: adding 10 parts by mass of reactive diluent 1,6 of hexanediol diglycidyl ether into 80 parts by mass of bisphenol A epoxy resin E51, stirring for 0.5h, adding 10 parts by mass of bifunctional urethane acrylate, and stirring for 1h for later use, wherein the stirring speed is 300-500 r/min;
(2) Preparation of a curing agent component: adding 20 parts by mass of 100-mesh vulcanized powder butadiene-acrylonitrile rubber into 80 parts by mass of methyl tetrahydrophthalic anhydride curing agent, stirring for 1 hour at the speed of 100-200 r/min, and then stirring for 1 hour at the speed of 300-500 r/min for later use;
(3) Preparing an epoxy asphalt mixture: and (2) dry-mixing 92 parts of basalt aggregate for 3-20 s, adding 3.1 parts by mass of No. 90 matrix asphalt component heated to 150 ℃, wet-mixing at 160 ℃ for 5-10 s, respectively adding 1.8 parts by mass of epoxy resin component, 1.3 parts by mass of curing agent component and 8 parts by mass of mineral powder, wet-mixing for 20-50 s, and uniformly mixing to obtain the epoxy asphalt mixture. Wherein the stone mixture composed of aggregates and mineral powder is EA-10 gradation shown in Table 1.
TABLE 1EA-10 grading
Example 2
(1) Preparation of epoxy resin component: adding 10 parts by mass of reactive diluent polypropylene glycol diglycidyl ether into 85 parts by mass of bisphenol A epoxy resin E51, stirring for 0.5h, adding 5 parts by mass of hexafunctional group urethane acrylate, and stirring for 1h for later use, wherein the stirring speed is 300-500 r/min;
(2) Preparing a curing agent component: adding 10 parts by mass of 300-mesh vulcanized powdered styrene-butadiene rubber into 80 parts by mass of methyl tetrahydrophthalic anhydride curing agent, stirring at the speed of 100-200 r/min for 1h, and then adding 10 parts by mass of modified aromatic amine MH-313, and stirring at the speed of 300-500 r/min for 1h for later use;
(3) Preparing an epoxy asphalt mixture: 96 parts of limestone aggregate is dry-mixed for 3 to 20 seconds, 2.5 parts by mass of No. 70 matrix asphalt component heated to 150 ℃ is added and wet-mixed for 5 to 10 seconds at 165 ℃, 1.4 parts by mass of epoxy resin component, 1.1 parts by mass of curing agent component and 4 parts by mass of mineral powder are respectively added and wet-mixed for 20 to 50 seconds, and the epoxy asphalt mixture is obtained after even mixing. Wherein the stone mixture composed of aggregates and mineral powder is the AC-13 gradation shown in Table 2.
TABLE 2AC-13 grading
Example 3
(1) Preparation of epoxy resin component: adding 10 parts by mass of reactive diluent polypropylene glycol diglycidyl ether into 75 parts by mass of bisphenol A epoxy resin E51, stirring for 0.5h, adding 15 parts by mass of bifunctional urethane acrylate, and stirring for 1h for later use, wherein the stirring speed is 300-500 r/min;
(2) Preparation of a curing agent component: adding 40 parts by mass of 100-mesh waste rubber powder vulcanized powder rubber into 60 parts by mass of methyl tetrahydrophthalic anhydride curing agent, stirring at the speed of 100-200 r/min for 1h, and then stirring at the speed of 300-500 r/min for 1h for later use;
(3) Preparing an epoxy asphalt mixture: 93 parts of granite aggregate are dry-mixed for 3 to 20 seconds, 4 parts of SBS modified asphalt (I-D) component heated to 165 ℃ is added, wet-mixed for 5 to 10 seconds at 170 ℃, 1.3 parts of epoxy resin component, 0.7 part of curing agent component and 7 parts of limestone mineral powder are respectively added, wet-mixed for 20 to 50 seconds, and the epoxy asphalt mixture is obtained after uniform mixing. Wherein the stone mixture composed of the aggregate and the mineral powder is the SMA-13 gradation shown in Table 3.
TABLE 3SMA-13 grading
Example 4
(1) Preparation of epoxy resin component: adding 10 parts by mass of reactive diluent polypropylene glycol diglycidyl ether into 75 parts by mass of bisphenol A epoxy resin E51, stirring for 0.5h, adding 15 parts by mass of bifunctional urethane acrylate, and stirring for 1h for later use, wherein the stirring speed is 300-500 r/min;
(2) Preparation of a curing agent component: adding 10 parts by mass of 100-mesh vulcanized powdered styrene-butadiene rubber into 80 parts by mass of methyl tetrahydrophthalic anhydride curing agent, stirring for 1h at the speed of 100-200 r/min, and then adding 10 parts by mass of modified aromatic amine MH-313, and stirring for 1h at the speed of 300-500 r/min for later use;
(3) Preparing an epoxy asphalt mixture: and (2) dry-mixing 99 parts of basalt aggregate for 3-20 s, adding 2.25 parts by mass of SBS modified asphalt (I-D) component heated to 165 ℃ and wet-mixing at 170 ℃ for 5-10 s, respectively adding 1.35 parts by mass of epoxy resin component, 0.9 part by mass of curing agent component and 1 part by mass of limestone mineral powder, wet-mixing for 20-50 s, and uniformly mixing to obtain the epoxy asphalt mixture. Wherein the stone mixture composed of aggregates and mineral powder is OGFC-10 gradation shown in Table 4.
TABLE 4OGFC-10 grading
Example 5
(1) Preparation of epoxy resin component: adding 10 parts by mass of reactive diluent polypropylene glycol diglycidyl ether into 85 parts by mass of bisphenol A epoxy resin E51, stirring for 0.5h, adding 5 parts by mass of hexafunctional group polyurethane acrylate, and stirring for 1h for later use, wherein the stirring speed is 300-500 r/min;
(2) Preparation of a curing agent component: adding 10 parts by mass of 300-mesh vulcanized powdered styrene-butadiene rubber into 80 parts by mass of methyl tetrahydrophthalic anhydride curing agent, stirring at the speed of 100-200 r/min for 1h, and then adding 10 parts by mass of modified aromatic amine MH-313, and stirring at the speed of 300-500 r/min for 1h for later use;
(3) Preparing an epoxy asphalt mixture: 96 parts of limestone aggregate is dry-mixed for 3 to 20 seconds, 2.1 parts by mass of No. 70 matrix asphalt component heated to 150 ℃ is added and wet-mixed for 5 to 10 seconds at 165 ℃, 1.18 parts by mass of epoxy resin component, 0.92 part by mass of curing agent component and 4 parts by mass of mineral powder are respectively added and wet-mixed for 20 to 50 seconds, and the epoxy asphalt mixture is obtained after even mixing. Wherein the stone mixture composed of aggregates and mineral powder is the AC-20 gradation shown in Table 5.
TABLE 5AC-20 gradation
Comparative example 1
93 parts of granite aggregate is dry-mixed for 3 to 20 seconds, 6 parts by mass of SBS modified asphalt (I-D) component heated to 165 ℃ is added, wet-mixed for 5 to 10 seconds at 170 ℃, 7 parts by mass of limestone mineral powder is added, wet-mixed for 20 to 50 seconds, and the mixture is uniformly mixed to obtain the asphalt mixture. Wherein the stone mixture composed of the aggregate and the mineral powder is the SMA-13 gradation shown in Table 3.
Comparative example 2
And (2) dry-mixing 96 parts of basalt aggregate for 3-20 s, adding 4.2 parts by mass of No. 70 matrix asphalt component heated to 150 ℃, wet-mixing at 165 ℃ for 5-10 s, adding 4 parts by mass of mineral powder, wet-mixing for 20-50 s, and uniformly mixing to obtain the asphalt mixture. Wherein the stone mixture composed of aggregates and mineral powder is the AC-20 gradation shown in Table 5.
Test examples
In order to further compare the application effect of the embodiment of the invention, the dynamic stability and the ultimate failure strain of the epoxy asphalt mixture are tested. The test method refers to a test method in technical Specification for pavement and construction of Steel road decks (JTG/T3364-02-2019), and the test results are shown in Table 6.
Table 6 shows a comparison of the dynamic stability and ultimate failure strain of the asphalt mixtures prepared in examples 1 to 5 and comparative examples 1 to 2. The dynamic stability of the initial test piece is measured after epoxy asphalt concrete prepared by a wheel rolling forming machine is cured for 4 hours at 60 +/-1 ℃ after the epoxy asphalt mixture is mixed, and the dynamic stability, the ultimate failure strain and the freeze-thaw splitting strength ratio of the fully cured test piece are measured after the epoxy asphalt mixture is cured for 4 days at 60 +/-1 ℃. The test temperature of the dynamic stability is 70 ℃, the tire grounding pressure is 0.7MPa, the test temperature of the ultimate failure strain is-10 ℃, and the test speed is 50mm/min. The freeze-thaw split strength ratio was tested as T0715. Wherein the initial dynamic stability, the dynamic stability of the completely solidified test piece, the ultimate failure strain and the ratio of the freeze-thaw splitting strength in the comparative example 1 and the comparative example 2 are all the results of tests performed after the asphalt mixture is molded and cooled for 24 hours.
TABLE 6 comparison of the Properties of the epoxy asphalt mixtures
As is clear from table 1, the epoxy asphalt mixture of the present invention can provide excellent high-temperature (high dynamic stability) and low-temperature performance (high ultimate failure strain) and high initial dynamic stability, and can provide a running surface for vehicles for construction work 4 hours after the construction of the epoxy asphalt mixture. Compared with the common asphalt mixture, the dynamic stability of the epoxy asphalt mixture is greatly improved.
In summary, the effects of the invention are as follows:
(1) The epoxy asphalt mixture provided by the invention can solve the problem of poor flexibility of the epoxy asphalt mixture, and has good dynamic stability and flexibility.
(2) According to the epoxy asphalt mixture provided by the invention, vulcanized powder rubber in the curing agent can be melted into a fluid state under the action of high temperature, and forms a uniform whole with epoxy resin, asphalt and stone, so that the flexibility of the epoxy asphalt mixture is improved.
(3) According to the preparation method of the epoxy asphalt mixture, provided by the invention, during actual on-site production, the asphalt component and the aggregate are mixed, and then the epoxy resin component and the curing agent component are respectively put into the mixed materials, so that the epoxy asphalt mixture can be prepared, and the production process is simplified.
The present invention is capable of other embodiments, and various changes and modifications can be made by one skilled in the art without departing from the spirit and scope of the invention.
Claims (12)
1. The epoxy asphalt mixture is characterized by comprising an asphalt component, an epoxy resin component, a curing agent component and a stone mixture, wherein the mass ratio of the components is as follows:
2. the epoxy asphalt mixture according to claim 1, wherein the epoxy resin component comprises epoxy resin, reactive diluent and toughening resin in the following mass ratio:
(1) 70-90 parts of epoxy resin,
(2) 5-15 parts of an active diluent,
(3) 5-15 parts of modified resin.
3. The epoxy asphalt mixture according to claim 2, wherein the epoxy resin is a bisphenol a type epoxy resin, a bisphenol F type epoxy resin, or a dimer acid-modified epoxy resin.
4. The epoxy asphalt mixture as claimed in claim 2, wherein the reactive diluent is a difunctional or multifunctional epoxy diluent, preferably, the epoxy diluent is one of 1,6 hexanediol diglycidyl ether, 1,4 butanediol diglycidyl ether, polypropylene glycol diglycidyl ether, glycerol propoxide triglycidyl ether, castor oil glycidyl ether.
5. The epoxy asphalt mixture according to claim 2, wherein the modifying resin is one of a monofunctional, difunctional or polyfunctional urethane acrylate resin.
6. The epoxy asphalt mixture according to claim 1, wherein the curing agent component comprises a curing agent and vulcanized powder rubber, and the mass of the composition is as follows:
(1) 50-90 parts of a curing agent,
(2) 10-50 parts of vulcanized powdered rubber.
7. The epoxy asphalt mixture according to claim 6, wherein the curing agent is one or more of aliphatic amine curing agent, aromatic amine curing agent, polyamide curing agent and anhydride curing agent.
8. The epoxy asphalt mixture according to claim 6, wherein the vulcanized powdered rubber is at least one selected from the group consisting of vulcanized powdered styrene-butadiene rubber, vulcanized powdered nitrile rubber and waste rubber powder vulcanized powdered rubber, and preferably the vulcanized powdered rubber is 100-300 mesh.
9. The epoxy asphalt mixture according to claim 1, wherein the asphalt component is one of No. 50 asphalt, no. 70 asphalt, no. 90 asphalt, and SBSI modified asphalt with performance meeting JTG F40-2004 specification requirements, preferably No. 70 asphalt.
10. The epoxy asphalt mixture according to claim 1, wherein the stone mixture is composed of aggregate and mineral powder, the aggregate is one of basalt, limestone, granite or diabase, the mineral powder is limestone mineral powder; preferably, the grading type of the aggregate and the mineral powder is EA-10, AC-13, SMA-13, OGFC-10 or AC-20.
11. The epoxy asphalt mixture according to claim 1, wherein the aggregate content in the stone mixture is 88-98 parts, and the addition amount of the mineral powder is 2-12 parts by mass.
12. The preparation method of the epoxy asphalt mixture is characterized by comprising the following steps:
(1) Preparation of epoxy resin component: adding the active diluent into the epoxy resin, stirring for 0.5-1 h, adding the modified resin, and stirring for 0.5-1 h for later use, wherein the stirring speed is 300-500 r/min;
(2) Preparation of a curing agent component: adding vulcanized powdered rubber into a curing agent, stirring at the speed of 100-200 r/min for 1-2 h, and then stirring at the speed of 300-500 r/min for 0.5-1 h for later use;
(3) Preparing an epoxy asphalt mixture: the aggregate is dry-mixed for 3 to 20 seconds, added with the asphalt component and wet-mixed for 5 to 10 seconds at the temperature of between 120 and 170 ℃, then added with the epoxy resin component, the curing agent component and the mineral powder and wet-mixed for 20 to 50 seconds, and the epoxy asphalt mixture is obtained after even mixing.
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