Stability-enhanced asphalt composition and preparation method thereof

Abstract

The invention discloses a stability-enhanced asphalt composition and a preparation method thereof, and the stability-enhanced asphalt composition comprises 5-20 parts of liquid rubber, 3-15 parts of a cross-linking agent, 1-10 parts of an odor removing agent, 40-85 parts of an assembly, 0.25-0.5 part of wheat straw fiber and 0.5-1.5 parts of an emulsifier. The composite member contains first asphalt, second asphalt, SMA asphalt, a styrene-butadiene-styrene block copolymer, a styrene-isoprene-styrene block copolymer, an octadecyl methacrylate-butyl acrylate-acrylic acid terpolymer, polyethylene wax and a filler. By arranging the assembly, the stripping force, the cohesiveness and the stability of low-temperature flexibility of the asphalt composition can be effectively enhanced, and the asphalt composition with good durability and good stability is obtained; by arranging the odor removing agent, the porous dispersing agent and the cross-linking agent, the stability of the asphalt composition is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of asphalt, and specifically to an asphalt composition with enhanced stability and a manufacturing method thereof. Background Art

[0002] As is well known, asphalt is a black and brown complex mixture composed of hydrocarbon compounds with different molecular weights and their non-metallic derivatives, and is a kind of high-viscosity organic liquid. Asphalt is a waterproof, moisture-proof and anti-corrosion organic cementing material, mostly existing in the form of tar or pitch, with a black surface and soluble in carbon disulfide. It is mainly divided into three types: coal tar asphalt, petroleum asphalt and natural asphalt, and is mainly used in industries such as coatings, plastics, rubber, etc. and for paving roads, etc.

[0003] However, the existing asphalt compositions have poor stability, and it is impossible to obtain an asphalt composition with good durability and stability. At the same time, it is impossible to reduce the emission of harmful gases, which inevitably leads to damage to the high-temperature performance of asphalt and reduces the high-temperature performance of asphalt pavements. Therefore, we propose an asphalt composition with enhanced stability and a manufacturing method thereof to solve the above-mentioned problems. Summary of the Invention

[0004] The purpose of the present invention is to provide an asphalt composition with enhanced stability and a manufacturing method thereof to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] An asphalt composition with enhanced stability, comprising 5 parts - 20 parts of liquid rubber, 3 parts - 15 parts of cross-linking agent, 1 part - 10 parts of odorless agent, 40 parts - 85 parts of assembly, 0.25 parts - 0.5 parts of wheat straw fiber and 0.5 parts - 1.5 parts of emulsifier. The assembly contains first asphalt, second asphalt, SMA asphalt, styrene-butadiene-styrene block copolymer, styrene-isoprene-styrene block copolymer, octadecyl methacrylate-butyl acrylate-acrylic acid terpolymer, polyethylene wax and filler.

[0007] As a further scheme of the present invention: The liquid rubber is carboxylated liquid nitrile rubber.

[0008] As a further scheme of the present invention: The cross-linking agent is selected from one of sulfur, peroxide and epoxy vegetable oil.

[0009] As a further scheme of the present invention: The peroxide is selected from at least one of dicumyl peroxide, benzoyl peroxide, sodium peroxide and ethylene glycol diacrylate.

[0010] As a further solution of the present invention: The odor purifying agent is composed of zinc ricinoleate, a porous dispersant, and activated zinc powder.

[0011] As a further solution of the present invention: The porous dispersant is any one or a mixture of several in any proportion of alumina, ultrafine activated carbon, and 4A molecular sieve.

[0012] As a further solution of the present invention: The octadecyl methacrylate-butyl acrylate-acrylic acid terpolymer is a product prepared by a method including the following steps: Under a protective atmosphere and in the presence of an initiator, octadecyl methacrylate, butyl acrylate, and acrylic acid are brought into contact and mixed to obtain an octadecyl methacrylate-butyl acrylate-acrylic acid terpolymer; and / or, the conditions for the contact mixing include: the temperature is 70°C - 110°C, and the time is 4h - 6h.

[0013] As a further solution of the present invention: The manufacturing method of the emulsifier includes: reacting dichloropropanol still residue with an organic amine to form an intermediate reaction mixture; mixing the intermediate reaction mixture with calcium oxide.

[0014] As a further solution of the present invention: The dichloropropanol still residue is a waste generated in the production of dichloropropanol or epichlorohydrin from glycerol. The production of dichloropropanol or epichlorohydrin from glycerol includes the following steps: chlorinating glycerol as a raw material to generate a mixture containing dichloropropanol; rectifying and purifying the mixture containing dichloropropanol to generate separated dichloropropanol and dichloropropanol still residue; saponifying the separated dichloropropanol to generate epichlorohydrin.

[0015] A method for manufacturing an asphalt composition with enhanced stability includes the following steps:

[0016] Step 1: Mix and stir the porous dispersant and the activated zinc powder for 30 min - 60 min to obtain a first mixture;

[0017] Step 2: Conduct a first mixing reaction on the first asphalt, the second asphalt, and the SMA asphalt to obtain Material I; conduct a second mixing reaction on Material I with a styrene-butadiene-styrene block copolymer, a styrene-isoprene-styrene block copolymer, and an octadecyl methacrylate-butyl acrylate-acrylic acid terpolymer to obtain Material II; conduct a third mixing reaction on Material II with polyethylene wax to obtain Material III; conduct a fourth mixing reaction on Material III with a filler to obtain an assembly;

[0018] Step 3: Mix and stir the liquid rubber, the crosslinking agent, the odor purifying agent, the wheat straw fiber, and the emulsifier for 45 min - 50 min to obtain a second mixture;

[0019] Step 4: Mix and stir the first mixture, the assembly, and the second mixture for 60 min - 80 min to obtain the asphalt composition.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] For the asphalt composition with enhanced stability and its manufacturing method, by providing the assembly, the stability of the stripping force, adhesiveness, and low-temperature flexibility of the asphalt composition can be effectively enhanced, and an asphalt composition with good durability and stability can be obtained; meanwhile, an asphalt composition with more excellent waterproof performance can be obtained on the premise of low cost, thereby achieving the purpose of cost reduction and efficiency increase in the preparation process of the asphalt composition.

[0022] For the asphalt composition with enhanced stability and its manufacturing method, by providing the odor remover, zinc ricinoleate in the odor remover has an efficient deodorizing function and can effectively remove the odor components in the asphalt. Combining with the excellent dispersion performance of the porous dispersant, the deodorant can be more evenly distributed in the asphalt, improving the deodorizing efficiency; by providing the porous dispersant, the introduction of the porous dispersant not only enhances the dispersibility of the asphalt, but also may improve the physical and mechanical properties of the asphalt to a certain extent, such as enhancing anti-aging property and improving toughness, etc., improving the stability of the asphalt composition;

[0023] For the asphalt composition with enhanced stability and its manufacturing method, by providing the cross-linking agent, the cross-linking agent cross-links and cures to reconstruct the internal cross-linking network structure of the aged rubber asphalt, thereby effectively regenerating the performance of the aged rubber asphalt and further improving the stability of the asphalt composition. Description of the Drawings

[0024] Figure 1 It is a schematic flow chart of the manufacturing method of the asphalt composition with enhanced stability of the present invention. Detailed Embodiments

[0025] Example 1

[0026] In one embodiment, as Figure 1 shown, an asphalt composition with enhanced stability includes 5 parts of liquid rubber, 3 parts of cross-linking agent, 1 part of odor remover, 40 parts of assembly, 0.25 part of wheat straw fiber, and 0.5 part of emulsifier. The assembly contains first asphalt, second asphalt, SMA asphalt, styrene-butadiene-styrene block copolymer, styrene-isoprene-styrene block copolymer, octadecyl methacrylate-butyl acrylate-acrylic acid terpolymer, polyethylene wax, and filler;

[0027] The liquid rubber is carboxylated liquid nitrile rubber; the crosslinking agent is selected from one of sulfur, peroxide and epoxy vegetable oil; the peroxide is selected from at least one of dicumyl peroxide, benzoyl peroxide, sodium peroxide and ethylene glycol diacrylate; the odorless agent is composed of zinc ricinoleate, porous dispersant and activated zinc powder; the porous dispersant is any one or a mixture of any proportion of alumina, ultra-fine activated carbon and 4A molecular sieve;

[0028] The octadecyl methacrylate-butyl acrylate-acrylic acid terpolymer is a product prepared by a method including the following steps: under a protective atmosphere, in the presence of an initiator, octadecyl methacrylate, butyl acrylate and acrylic acid are brought into contact and mixed to obtain the octadecyl methacrylate-butyl acrylate-acrylic acid terpolymer; and / or, the conditions for the contact mixing include: the temperature is 70°C - 110°C, and the time is 4h - 6h;

[0029] The manufacturing method of the emulsifier includes: reacting dichloropropanol still residue with organic amine to form an intermediate reaction mixture; mixing the intermediate reaction mixture with calcium oxide; the dichloropropanol still residue is the waste generated in the production of dichloropropanol or epichlorohydrin from glycerol, and the production of dichloropropanol or epichlorohydrin from glycerol includes the following steps: chlorinating glycerol as a raw material to generate a mixture containing dichloropropanol; rectifying and purifying the mixture containing dichloropropanol to generate separated dichloropropanol and dichloropropanol still residue; saponifying the separated dichloropropanol to generate epichlorohydrin.

[0030] The dichloropropanol still residue and the organic amine are mixed at a temperature of 100°C - 150°C for 3 hours - 5 hours; for example, the temperature range can be 110°C - 150°C, or 120°C - 150°C, or 130°C - 150°C, or 140°C - 150°C, or can be within the numerical range obtained by any combination of the above two end values; the mixing time can be 3.5 hours - 4.5 hours, for example 3 hours - 4 hours, or 3.2 hours - 3.5 hours, or can be within the numerical range obtained by any combination of the above two end values;

[0031] Example 2

[0032] In one embodiment, as Figure 1 shown, a bitumen composition with enhanced stability includes 13 parts of liquid rubber, 9 parts of crosslinking agent, 5.5 parts of odorless agent, 63 parts of assembly, 0.35 parts of wheat straw fiber and 1 part of emulsifier. The assembly contains first bitumen, second bitumen, SMA bitumen, styrene-butadiene-styrene block copolymer, styrene-isoprene-styrene block copolymer, octadecyl methacrylate-butyl acrylate-acrylic acid terpolymer, polyethylene wax and filler;

[0033] The liquid rubber is carboxylated liquid nitrile rubber; the crosslinking agent is selected from one of sulfur, peroxide and epoxy vegetable oil; the peroxide is selected from at least one of dicumyl peroxide, benzoyl peroxide, sodium peroxide and ethylene glycol diacrylate; the odor remover is composed of zinc ricinoleate, porous dispersant and activated zinc powder; the porous dispersant is any one or a mixture of any proportions of alumina, ultrafine activated carbon and 4A molecular sieve;

[0034] The octadecyl methacrylate-butyl acrylate-acrylic acid terpolymer is a product prepared by a method including the following steps: under a protective atmosphere and in the presence of an initiator, octadecyl methacrylate, butyl acrylate and acrylic acid are brought into contact and mixed to obtain the octadecyl methacrylate-butyl acrylate-acrylic acid terpolymer; and / or, the conditions for the contact mixing include: the temperature is 70°C - 110°C and the time is 4h - 6h;

[0035] The manufacturing method of the emulsifier includes: reacting dichloropropanol still residue with an organic amine to form an intermediate reaction mixture; mixing the intermediate reaction mixture with calcium oxide; the dichloropropanol still residue is the waste generated in the production of dichloropropanol or epichlorohydrin from glycerol, and the production of dichloropropanol or epichlorohydrin from glycerol includes the following steps: chlorinating glycerol as a raw material to generate a mixture containing dichloropropanol; rectifying and purifying the mixture containing dichloropropanol to produce separated dichloropropanol and dichloropropanol still residue; saponifying the separated dichloropropanol to produce epichlorohydrin;

[0036] The dichloropropanol still residue and the organic amine are mixed at a temperature of 100°C - 150°C for 3 hours - 5 hours; for example, the temperature range can be 110°C - 150°C, or 120°C - 150°C, or 130°C - 150°C, or 140°C - 150°C, or can be within the numerical range obtained by any combination of the above two end values; the mixing time can be 3.5 hours - 4.5 hours, for example 3 hours - 4 hours, or 3.2 hours - 3.5 hours, or can be within the numerical range obtained by any combination of the above two end values.

[0037] Example 3

[0038] In one embodiment, as Figure 1 shown, a bituminous composition with enhanced stability includes 20 parts of liquid rubber, 15 parts of crosslinking agent, 10 parts of odor remover, 85 parts of assembly, 0.5 part of wheat straw fiber and 1.5 parts of emulsifier, and the assembly contains first asphalt, second asphalt, SMA asphalt, styrene-butadiene-styrene block copolymer, styrene-isoprene-styrene block copolymer, octadecyl methacrylate-butyl acrylate-acrylic acid terpolymer, polyethylene wax and filler;

[0039] The liquid rubber is carboxylated liquid nitrile rubber; the crosslinking agent is selected from one of sulfur, peroxide and epoxy vegetable oil; the peroxide is selected from at least one of dicumyl peroxide, benzoyl peroxide, sodium peroxide and ethylene glycol diacrylate; the odorless agent is composed of zinc ricinoleate, porous dispersant and activated zinc powder; the porous dispersant is any one or a mixture of any proportions of alumina, ultrafine activated carbon and 4A molecular sieve;

[0040] The octadecyl methacrylate-butyl acrylate-acrylic acid terpolymer is a product prepared by a method including the following steps: under a protective atmosphere and in the presence of an initiator, octadecyl methacrylate, butyl acrylate and acrylic acid are brought into contact and mixed to obtain the octadecyl methacrylate-butyl acrylate-acrylic acid terpolymer; and / or, the conditions for the contact mixing include: the temperature is 70°C - 110°C and the time is 4h - 6h;

[0041] The manufacturing method of the emulsifier includes: reacting dichloropropanol still residue with organic amine to form an intermediate reaction mixture; mixing the intermediate reaction mixture with calcium oxide; the dichloropropanol still residue is the waste generated in the production of dichloropropanol or epichlorohydrin from glycerol, and the production of dichloropropanol or epichlorohydrin from glycerol includes the following steps: chlorinating glycerol as a raw material to generate a mixture containing dichloropropanol; rectifying and purifying the mixture containing dichloropropanol to generate separated dichloropropanol and dichloropropanol still residue; saponifying the separated dichloropropanol to generate epichlorohydrin;

[0042] The dichloropropanol still residue and the organic amine are mixed at a temperature of 100°C - 150°C for 3 hours - 5 hours; for example, the temperature range can be 110°C - 150°C, or 120°C - 150°C, or 130°C - 150°C, or 140°C - 150°C, or can be within the numerical range obtained by any combination of the above two end values; the mixing time can be 3.5 hours - 4.5 hours, for example 3 hours - 4 hours, or 3.2 hours - 3.5 hours, or can be within the numerical range obtained by any combination of the above two end values.

[0043] Performance test

[0044] The asphalt compositions prepared in Examples 1 - 3 are made into splines, and a universal material testing machine is used to conduct mechanical property tests on multiple groups of splines, and DMA dynamic mechanical analysis is used to test the viscoelastic properties and compatibility of the splines.

[0045] The test results are shown in Table 1.

[0046] Table 1 shows the performance data of the asphalt compositions prepared in Examples 1 - 3

[0047] Example 1 Example 2 Example 3 Tensile strength / Mpa 4.56 3.98 5.84 Viscoelastic property / Mpa 2.15 3.21 3.56 Elongation at break % 178 163 215

[0048] As can be seen from the performance data in the above table, the asphalt composition prepared under the preparation conditions of Example 3 has the best performance.

[0049] A method for manufacturing an asphalt composition with enhanced stability, comprising the following steps:

[0050] Step 1: Mix and stir a porous dispersant and activated zinc powder for 30 min - 60 min to obtain a first mixture;

[0051] Step 2: Conduct a first mixing reaction on a first asphalt, a second asphalt, and SMA asphalt to obtain Material I; conduct a second mixing reaction on Material I with a styrene-butadiene-styrene block copolymer, a styrene-isoprene-styrene block copolymer, and an octadecyl methacrylate-butyl acrylate-acrylic acid terpolymer to obtain Material II; conduct a third mixing reaction on Material II with polyethylene wax to obtain Material III; conduct a fourth mixing reaction on Material III with a filler to obtain an assembly;

[0052] Step 3: Mix and stir a liquid rubber, a crosslinking agent, a deodorant, and wheat straw fiber for 45 min - 50 min to obtain a second mixture; subsequently, mix and stir the first mixture, the assembly, and the second mixture for 60 min - 80 min to obtain a third mixture;

[0053] Step 4: Mix and stir the third mixture with an emulsifier for 30 min - 40 min to obtain the asphalt composition.

[0054] In the present invention, by setting up the assembly, the peel strength, adhesiveness, and stability of low-temperature flexibility of the asphalt composition can be effectively enhanced, and an asphalt composition with good durability and stability can be obtained; at the same time, an asphalt composition with more excellent waterproof performance can be obtained on the premise of low cost, thereby achieving the purpose of reducing costs and increasing efficiency in the preparation process of the asphalt composition; by setting up the deodorant, zinc ricinoleate in the deodorant has an efficient deodorizing function and can effectively remove the odor components in the asphalt. Combining with the excellent dispersion performance of the porous dispersant, the deodorant can be more evenly distributed in the asphalt, improving the deodorization efficiency; by setting up the porous dispersant, the introduction of the porous dispersant not only enhances the dispersion of the asphalt, but also may improve the physical and mechanical properties of the asphalt to a certain extent, such as enhancing anti-aging properties and improving toughness, etc., improving the stability of the asphalt composition; by setting up the crosslinking agent, the crosslinking agent crosslinks and cures to reconstruct the internal crosslinking network structure of the aged rubber asphalt, thereby effectively regenerating the performance of the aged rubber asphalt and further improving the stability of the asphalt composition.

[0055] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes should be covered within the protection scope of the present invention.

Claims

1. An asphalt composition with enhanced stability, characterized in that, It includes 5 parts - 20 parts of liquid rubber, 3 parts - 15 parts of crosslinking agent, 1 part - 10 parts of odor remover, 40 parts - 85 parts of assembly, 0.25 parts - 0.5 parts of wheat straw fiber and 0.5 parts - 1.5 parts of emulsifier. The assembly contains first asphalt, second asphalt, SMA asphalt, styrene-butadiene-styrene block copolymer, styrene-isoprene-styrene block copolymer, octadecyl methacrylate-butyl acrylate-acrylic acid terpolymer, polyethylene wax and filler.

2. An asphalt composition for enhancing stability according to claim 1, wherein The liquid rubber is carboxylated liquid nitrile rubber.

3. An asphalt composition for enhancing stability according to claim 1, wherein The crosslinking agent is selected from one of sulfur, peroxide and epoxy vegetable oil.

4. An asphalt composition for enhancing stability according to claim 3, wherein, The peroxide is selected from at least one of dicumyl peroxide, benzoyl peroxide, sodium peroxide and ethylene glycol diacrylate.

5. An asphalt composition for enhancing stability according to claim 1, characterized in that, The odor remover is composed of zinc ricinoleate, porous dispersant and activated zinc powder.

6. An asphalt composition for enhancing stability according to claim 5, characterized in that, The porous dispersant is any one or a mixture of any proportions of alumina, ultra-fine activated carbon and 4A molecular sieve.

7. An asphalt composition for enhancing stability according to claim 1, characterized in that, The octadecyl methacrylate-butyl acrylate-acrylic acid terpolymer is a product prepared by a method including the following steps: under a protective atmosphere and in the presence of an initiator, octadecyl methacrylate, butyl acrylate and acrylic acid are brought into contact and mixed to obtain the octadecyl methacrylate-butyl acrylate-acrylic acid terpolymer; and / or, the conditions for the contact mixing include: the temperature is 70°C - 110°C and the time is 4h - 6h.

8. An asphalt composition for enhancing stability according to claim 1, characterized in that, The manufacturing method of the emulsifier includes: reacting dichloropropanol kettle residue with organic amine to form an intermediate reaction mixture; mixing the intermediate reaction mixture with calcium oxide.

9. An asphalt composition for enhancing stability according to claim 8, characterized in that, The dichloropropanol kettle residue is the waste generated in the production of dichloropropanol or epichlorohydrin from glycerol. The production of dichloropropanol or epichlorohydrin from glycerol includes the following steps: chlorinating glycerol as a raw material to generate a mixture containing dichloropropanol; rectifying and purifying the mixture containing dichloropropanol to generate separated dichloropropanol and dichloropropanol kettle residue; saponifying the separated dichloropropanol to generate epichlorohydrin.

10. A method for manufacturing an asphalt composition with enhanced stability, characterized in that, Applied to the asphalt composition according to any one of claims 1 - 9 above, the manufacturing method includes the following steps: Step 1: Mix and stir the porous dispersant and activated zinc powder for 30 min - 60 min to obtain a first mixture; Step 2: Conduct a first mixing reaction on the first asphalt, second asphalt and SMA asphalt to obtain material I; conduct a second mixing reaction on material I with styrene-butadiene-styrene block copolymer, styrene-isoprene-styrene block copolymer, octadecyl methacrylate-butyl acrylate-acrylic acid terpolymer to obtain material II; conduct a third mixing reaction on material II with polyethylene wax to obtain material III; conduct a fourth mixing reaction on material III with filler to obtain the assembly; Step 3: Mix and stir the liquid rubber, crosslinking agent, odor remover and wheat straw fiber for 45 min - 50 min to obtain a second mixture; then mix and stir the first mixture, the assembly and the second mixture for 60 min - 80 min to obtain a third mixture; Step 4: Mix and stir the third mixture and the emulsifier for 30 min - 40 min to obtain an asphalt composition.

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