Asphalt modifier, environment-friendly plastomer modified asphalt and preparation method thereof
By processing sugarcane bagasse fibers to enhance their bonding strength with asphalt, an environmentally friendly plastomer-modified asphalt is prepared, which solves the problem of uneven dispersion of sugarcane fibers in asphalt and improves the stability and performance of asphalt pavement.
Patent Information
- Application Number
- CN202510777041.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-11
- Publication Date
- 2025-09-12
AI Technical Summary
Sugarcane fibers tend to tangle into clumps and disperse unevenly when sheared with asphalt, resulting in local fiber enrichment and local fiber depletion in the asphalt mixture, and unstable performance of the resulting pavement.
The modifier is prepared using sugarcane fiber. The interfacial bonding between sugarcane fiber and asphalt is enhanced by treating sugarcane bagasse. The sugarcane bagasse fiber is treated with benzoyl peroxide and maleic anhydride to form benzoyloxy free radicals and maleic anhydride grafting to enhance the bonding between sugarcane fiber and non-polar asphalt, thereby preparing environmentally friendly plastic modified asphalt.
It improves the structural stability and road performance of asphalt mixture, reduces the amount of asphalt used, enhances Marshall stability and splitting strength, and forms a more stable road surface.
Smart Images
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Abstract
Description
Technical Field
[0001] The present invention relates to the field of road technical materials, and in particular to an asphalt modifier, an environmentally friendly plastomer-modified asphalt and a preparation method thereof. Background Art
[0002] China is a major sugarcane-growing country, and the Guangxi Zhuang Autonomous Region is a major sugarcane-growing and sugarcane-sugar-making province. The amount of sugarcane bagasse produced is huge. Sugarcane bagasse is an important environmentally friendly plastic and has multiple potential economic values after reasonable utilization.
[0003] However, the sugarcane bagasse after sugar pressing is in strip form and needs to undergo a series of treatments to form smaller sugarcane fibers. Ordinary matrix asphalt is modified with sugarcane fibers to increase the viscosity of the modified asphalt, improve its anti-rutting performance and low-temperature crack resistance, and reduce permanent deformation. However, sugarcane fibers are easily entangled and unevenly dispersed when sheared with asphalt, resulting in local fiber enrichment and local barrenness in the asphalt mixture, and the performance of the resulting road surface is unstable.
[0004] To solve the above technical problems, the present invention first prepares a modifier with sugarcane fiber, and then uses the modifier to modify asphalt, so as to achieve the purpose of absorbing a large amount of sugarcane bagasse and reducing the amount of asphalt while improving the stability of asphalt road performance. Summary of the Invention
[0005] The purpose of the present invention is to provide an asphalt modifier, an environmentally friendly plastomer-modified asphalt and a preparation method thereof, aiming to solve the problem that sugarcane fibers are easily entangled into clumps and unevenly dispersed when sheared with asphalt, resulting in local fiber enrichment and local fiber poverty in the asphalt mixture, and unstable road performance.
[0006] An asphalt modifier for preparing environmentally friendly plastomer-modified asphalt, characterized by comprising:
[0007] 25-30 parts of polyhydroxyalkanoate, 5-10 parts of bagasse fiber, 1-4 parts of trimethylaminoethylpiperazine, 1-3 parts of 5-hydroxymethylfurfural, 1-3 parts of p-toluenesulfonic acid, 0.3-0.8 parts of aluminum hydroxide, 0.1-0.5 parts of dispersant, 0.5-1.0 parts of anti-aging agent, 0.8-1.0 parts of environmentally friendly plasticizer, and 0.2-0.5 parts of antioxidant.
[0008] Preferably, in the above technical solution, the bagasse fiber is processed as follows:
[0009] S11, preparing bagasse fiber by chopping, cleaning, boiling, washing, and drying sugarcane bagasse;
[0010] S12, dispersing the treated sugarcane bagasse in a solvent, adding maleic anhydride and benzoyl peroxide, heating to 80-100° C. under nitrogen protection, reacting for 4-6 hours, washing away the maleic anhydride with acetone, and obtaining bagasse fiber.
[0011] Preferably, in the above technical solution, the steps of step S11 are specifically as follows: chopping the sugarcane bagasse to facilitate the separation of fibers in the sugarcane bagasse during the boiling process, washing and removing some impurities in the sugarcane bagasse, placing the washed sugarcane in a boiling pot, adding an appropriate amount of alkali solution and an oxidant, maintaining boiling for 2-3 hours, taking out, washing and drying, and obtaining the treated sugarcane bagasse.
[0012] Preferably, in the above technical solution, the alkali solution is one of sodium hydroxide and potassium hydroxide.
[0013] Preferably, in the above technical solution, the oxidant is hydrogen peroxide and ferric oxide.
[0014] Preferably, in the above technical solution, the solvent is one of xylene and ethylbenzene.
[0015] According to the above technical scheme, by treating sugarcane bagasse and further treating the sugarcane bagasse with benzoyl peroxide and maleic anhydride, benzoyl peroxide is used to generate benzoyloxy free radicals, and the benzoyloxy free radicals promote the formation of cellulose macromolecular free radicals in sugarcane bagasse cellulose. The cellulose macromolecular free radicals are grafted with maleic anhydride to increase the groups in the sugarcane bagasse, enhance the interfacial bonding strength between sugarcane fiber and non-polar asphalt, strengthen the bonding, enhance the Marshall stability, reduce the pore generation between sugarcane fiber and asphalt, and reduce the porosity and permeability coefficient.
[0016] A method for preparing environmentally friendly plastomer-modified asphalt, the method comprising:
[0017] S10, preparing an asphalt modifier according to the above preparation method, wherein the raw materials of the asphalt modifier are 25-30 parts of polyhydroxyalkanoate, 5-10 parts of bagasse fiber, 1-4 parts of trimethylaminoethylpiperazine, 1-3 parts of 5-hydroxymethylfurfural, 1-3 parts of p-toluenesulfonic acid, 0.3-0.8 parts of aluminum hydroxide, 0.1-0.5 parts of dispersant, 0.5-1.0 parts of anti-aging agent, 0.8-1.0 parts of environmentally friendly plasticizer, and 0.2-0.5 parts of antioxidant;
[0018] S20, placing petroleum heavy traffic asphalt 70# in an oven and heating it to 160-170° C. to melt, mixing the melted petroleum heavy traffic asphalt 70# and the asphalt modifier, and shearing them with a shearing machine for 40-50 minutes to obtain an environmentally friendly plastomer modified asphalt.
[0019] Preferably, in the above technical solution, the preparation method of the bagasse fiber is as follows:
[0020] S11, chopping the bagasse to facilitate the separation of fibers in the bagasse during boiling, washing the bagasse to remove some impurities, placing the washed sugarcane in a boiling pot, adding appropriate amounts of alkali solution and oxidant, and boiling for 2-3 hours, removing the bagasse, washing, and drying to obtain treated bagasse;
[0021] S12, dispersing the treated sugarcane bagasse in a solvent, adding maleic anhydride and benzoyl peroxide, heating to 80-100° C. under nitrogen protection, reacting for 4-6 hours, washing away the maleic anhydride with acetone, and obtaining bagasse fiber.
[0022] Preferably, in the above technical solution, the rotation speed of the shearing machine is set to 4-10kr / min.
[0023] An application of the above-mentioned environmentally friendly plastomer-modified asphalt: The environmentally friendly plastomer-modified asphalt is used in asphalt pavement construction, and the asphalt pavement construction includes:
[0024] S100, carry out roadbed cleaning and roadbed excavation;
[0025] S200, heating the environmentally friendly plastomer-modified asphalt, coarse aggregate, fine aggregate, and mineral filler to 160° C., and then mixing the preheated 45-55% environmentally friendly plastomer-modified asphalt, 25-30% coarse aggregate, 10-15% fine aggregate, and 10-15% mineral filler in an asphalt mixer to obtain an asphalt mixture;
[0026] S300, spreading the mixture on the roadbed, and rolling the spread asphalt mixture multiple times with a road roller to form a smooth road surface.
[0027] Compared with the prior art, the present invention has the following beneficial effects:
[0028] (1) using alkali solution and oxidant to treat sugarcane bagasse to obtain treated sugarcane bagasse, and further treating the treated sugarcane bagasse with maleic anhydride and benzoyl peroxide, maleic anhydride and the treated sugarcane bagasse under the action of benzoyl peroxide to form bagasse fiber containing carboxyl groups, introducing non-polar chain segments, improving the dispersibility of bagasse fiber, reducing the entanglement of bagasse fiber into agglomerates when preparing the modifier, and then adding the modifier particles to the matrix asphalt to modify it, thereby avoiding the uneven distribution of fibers in the asphalt mixture, thereby improving the structural stability and road performance of the environmentally friendly plastic modified asphalt;
[0029] (2) An environmentally friendly plastomer was prepared mainly with polyhydroxyalkanoate and bagasse fiber to modify petroleum heavy traffic asphalt 70#, thereby reducing the amount of asphalt used in asphalt pavement construction by 30%-40%. 5-Hydroxymethylfurfural catalyzed the aldehyde reaction of polyhydroxyalkanoate and 5-Hydroxymethylfurfural to form a three-dimensional cross-linked structure. Trimethylaminoethylpiperazine further stabilized the three-dimensional cross-linked structure, thereby enhancing the Marshall stability and splitting strength of the asphalt pavement prepared from the modified asphalt. DETAILED DESCRIPTION
[0030] The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort shall fall within the scope of protection of the present invention.
[0031] Bagasse: from Nanning Dongjiang Sugar Co., Ltd.
[0032] Example 1
[0033] An asphalt modifier for preparing environmentally friendly plastomer-modified asphalt, the components of the asphalt modifier are as follows:
[0034] 28 parts of polyhydroxyalkanoate, 8 parts of bagasse fiber, 3 parts of trimethylaminoethylpiperazine, 2 parts of 5-hydroxymethylfurfural, 1 part of p-toluenesulfonic acid, 0.5 parts of aluminum hydroxide, 0.3 parts of dispersant, 0.5 parts of anti-aging agent, 0.8 parts of environmentally friendly plasticizer, and 0.3 parts of antioxidant; wherein the sugarcane fiber is processed as follows:
[0035] The sugarcane bagasse is chopped to facilitate the separation of fibers in the sugarcane bagasse during the boiling process, and some impurities in the sugarcane bagasse are removed by washing. The washed sugarcane is placed in a boiling pot, and appropriate amounts of sodium hydroxide, hydrogen peroxide and ferric oxide are added. The mixture is boiled for 2.5 hours, taken out, washed and dried to obtain the treated sugarcane bagasse. 50 kg of the treated sugarcane bagasse is dispersed in a solvent (xylene), 5 kg of maleic anhydride and 0.15 kg of benzoyl peroxide are added, and the mixture is heated to 85° C. under nitrogen protection and reacted for 5 hours.
[0036] A method for preparing an asphalt modifier for preparing environmentally friendly plastomer-modified asphalt:
[0037] S1, sugarcane fiber preparation:
[0038] S11, bagasse is chopped, cleaned, boiled, rinsed, and dried to prepare bagasse fiber, and the specific steps are as follows:
[0039] The sugarcane bagasse is chopped to facilitate the separation of fibers in the bagasse during the boiling process, and some impurities in the bagasse are removed by washing. The washed sugarcane is placed in a boiling pot, and appropriate amounts of sodium hydroxide, hydrogen peroxide and ferric oxide are added. The mixture is kept boiling for 2.5 hours, and the bagasse is taken out, washed and dried to obtain the treated bagasse.
[0040] S12, dispersing 50 kg of treated bagasse in a solvent (xylene), adding 5 kg of maleic anhydride and 0.15 kg of benzoyl peroxide, heating to 85° C. under nitrogen protection, and reacting for 5 hours to obtain bagasse fiber;
[0041] S2, taking polyhydroxyalkanoate, the sugarcane fiber, and aluminum hydroxide, and kneading them for 4 minutes until they are preliminarily uniformly mixed to obtain a primary mixture;
[0042] S3, add trimethylaminoethylpiperazine, 5-hydroxymethylfurfural, and p-toluenesulfonic acid to the primary mixture in sequence, mix for 7 minutes, then add dispersant, anti-aging agent, plasticizer, and antioxidant, mix for 4 minutes until the material becomes a homogeneous viscoelastic mass, discharge the material, cool it, and cut it into small particles, where the small particles are asphalt modifiers.
[0043] A method for preparing environmentally friendly plastomer-modified asphalt, the method comprising:
[0044] S10, preparing an asphalt modifier according to the above method, wherein the raw materials of the asphalt modifier are 28 parts of polyhydroxyalkanoate, 8 parts of bagasse fiber, 3 parts of trimethylaminoethylpiperazine, 2 parts of 5-hydroxymethylfurfural, 1 part of p-toluenesulfonic acid, 0.5 parts of aluminum hydroxide, 0.3 parts of dispersant, 0.8 parts of anti-aging agent, 0.8 parts of environmentally friendly plasticizer, and 0.3 parts of antioxidant;
[0045] S20, placing petroleum heavy traffic asphalt 70# in an oven and heating it to 160°C to melt it, adding the asphalt modifier to the melted petroleum heavy traffic asphalt 70# and shearing it with a shearing machine (the speed is set to 6 kr / min) for 50 minutes to obtain an environmentally friendly plastic modified asphalt.
[0046] An environmentally friendly plastomer-modified asphalt is used for asphalt pavement construction, the asphalt pavement construction comprising:
[0047] S100, carry out roadbed cleaning and roadbed excavation;
[0048] S200, taking environmentally friendly plastomer-modified asphalt, coarse aggregate, fine aggregate, and mineral filler and heating them to 160° C., and then using an asphalt mixer to mix 40% of the preheated environmentally friendly plastomer-modified asphalt, 40% of the coarse aggregate, 15% of the fine aggregate, and 5% of the mineral filler to obtain an asphalt mixture;
[0049] S300, spreading the mixture on the roadbed, and rolling the spread asphalt mixture multiple times with a road roller to form a smooth road surface.
[0050] Example 2
[0051] An asphalt modifier for preparing environmentally friendly plastomer-modified asphalt, the components of the asphalt modifier are as follows:
[0052] 30 parts of polyhydroxy fatty acid, 10 parts of bagasse fiber, 4 parts of trimethylaminoethylpiperazine, 2 parts of 5-hydroxymethylfurfural, 1.5 parts of p-toluenesulfonic acid, 0.8 parts of aluminum hydroxide, 0.5 parts of dispersant, 0.8 parts of anti-aging agent, 1 part of environmentally friendly plasticizer, and 0.5 parts of antioxidant; wherein the sugarcane fiber is processed as follows:
[0053] The sugarcane bagasse is chopped to facilitate the separation of fibers in the bagasse during the boiling process, and some impurities in the bagasse are removed by washing. The washed sugarcane is placed in a boiling pot, and appropriate amounts of potassium hydroxide, hydrogen peroxide and ferric oxide are added. The mixture is boiled for 2-3 hours, taken out, washed and dried to obtain the treated bagasse. 50 kg of the treated bagasse is dispersed in a solvent (xylene), 6 kg of maleic anhydride and 0.2 kg of benzoyl peroxide are added, and the mixture is heated to 100° C. under nitrogen protection and reacted for 5 hours.
[0054] A method for preparing an asphalt modifier for preparing environmentally friendly plastomer-modified asphalt:
[0055] S1, sugarcane fiber preparation:
[0056] S11, bagasse is chopped, cleaned, boiled, rinsed, and dried to prepare bagasse fiber, and the specific steps are as follows:
[0057] The sugarcane bagasse is chopped to facilitate the separation of fibers in the bagasse during the boiling process, and some impurities in the bagasse are removed by washing. The washed sugarcane is placed in a boiling pot, and appropriate amounts of potassium hydroxide, hydrogen peroxide and ferric oxide are added. The mixture is kept boiling for 2-3 hours, and the bagasse is taken out, washed and dried to obtain the processed bagasse.
[0058] S12, dispersing 50 kg of treated bagasse in a solvent (xylene), adding 6 kg of maleic anhydride and 0.2 kg of benzoyl peroxide, heating to 100° C. under nitrogen protection, and reacting for 5 hours to obtain bagasse fiber;
[0059] S2, taking polyhydroxyalkanoate, the sugarcane fiber, and aluminum hydroxide, and kneading them for 5 minutes until they are preliminarily uniformly mixed to obtain a primary mixture;
[0060] S3, add trimethylaminoethylpiperazine, 5-hydroxymethylfurfural, and p-toluenesulfonic acid to the primary mixture in sequence, and mix for 7 minutes. Then add a dispersant, an anti-aging agent, a plasticizer, and an antioxidant, and mix for 5 minutes until the material becomes a homogeneous viscoelastic mass. Discharge the material, cool it, and cut it into small particles. The small particles are asphalt modifiers.
[0061] A method for preparing environmentally friendly plastomer-modified asphalt, the method comprising:
[0062] S10, preparing an asphalt modifier according to the above method, wherein the raw materials of the asphalt modifier are 30 parts of polyhydroxy fatty acid, 10 parts of bagasse fiber, 4 parts of trimethylaminoethylpiperazine, 2 parts of 5-hydroxymethylfurfural, 1.5 parts of p-toluenesulfonic acid, 0.8 parts of aluminum hydroxide, 0.5 parts of dispersant, 0.8 parts of anti-aging agent, 1 part of environmentally friendly plasticizer, and 0.5 parts of antioxidant;
[0063] S20, placing petroleum heavy traffic asphalt 70# in an oven and heating it to 165°C to melt it, adding the asphalt modifier to the melted petroleum heavy traffic asphalt 70# and shearing it with a shearing machine (the speed is set to 8kr / min) for 50 minutes to obtain an environmentally friendly plastic modified asphalt.
[0064] An environmentally friendly plastomer-modified asphalt is used for asphalt pavement construction, the asphalt pavement construction comprising:
[0065] S100, carry out roadbed cleaning and roadbed excavation;
[0066] S200, heating the environmentally friendly plastomer-modified asphalt, coarse aggregate, fine aggregate, and mineral filler to 165° C., and then mixing the preheated 45% environmentally friendly plastomer-modified asphalt, 30% coarse aggregate, 15% fine aggregate, and 10% mineral filler in an asphalt mixer to obtain an asphalt mixture;
[0067] S300, spreading the mixture on the roadbed, and rolling the spread asphalt mixture multiple times with a road roller to form a smooth road surface.
[0068] Example 3
[0069] An asphalt modifier for preparing environmentally friendly plastomer-modified asphalt, the components of the asphalt modifier are as follows:
[0070] 25 parts of polyhydroxyalkanoate, 5 parts of bagasse fiber, 2 parts of trimethylaminoethylpiperazine, 1 part of 5-hydroxymethylfurfural, 1 part of p-toluenesulfonic acid, 0.3 parts of aluminum hydroxide, 0.1 parts of dispersant, 0.5 parts of anti-aging agent, 0.8 parts of environmentally friendly plasticizer, and 0.2 parts of antioxidant; wherein the sugarcane fiber is processed as follows:
[0071] The sugarcane bagasse is chopped to facilitate the separation of fibers in the bagasse during the boiling process, and some impurities in the bagasse are removed by washing. The washed sugarcane is placed in a boiling pot, and appropriate amounts of sodium hydroxide, hydrogen peroxide and ferric oxide are added. The mixture is boiled for 3 hours, taken out, washed and dried to obtain the treated bagasse. 50 kg of the treated bagasse is dispersed in a solvent (ethylene xylene), 5 kg of maleic anhydride and 0.15 kg of benzoyl peroxide are added, and the mixture is heated to 80° C. under nitrogen protection and reacted for 4 hours.
[0072] A method for preparing an asphalt modifier for preparing environmentally friendly plastomer-modified asphalt:
[0073] S1, sugarcane fiber preparation:
[0074] S11, bagasse is chopped, cleaned, boiled, rinsed, and dried to prepare bagasse fiber, and the specific steps are as follows:
[0075] The sugarcane bagasse is chopped to facilitate the separation of fibers in the bagasse during the boiling process, and some impurities in the bagasse are removed by washing. The washed sugarcane is placed in a boiling pot, and appropriate amounts of sodium hydroxide, hydrogen peroxide and ferric oxide are added. The mixture is kept boiling for 3 hours, and the bagasse is taken out, washed and dried to obtain the processed bagasse.
[0076] S12, dispersing 50 kg of treated bagasse in a solvent (ethylbenzene), adding 5 kg of maleic anhydride and 0.15 kg of benzoyl peroxide, heating to 80° C. under nitrogen protection, and reacting for 4 hours to obtain bagasse fiber;
[0077] S2, taking polyhydroxyalkanoate, the sugarcane fiber, and aluminum hydroxide, and kneading them for 3 minutes until they are preliminarily uniformly mixed to obtain a primary mixture;
[0078] S3, add trimethylaminoethylpiperazine, 5-hydroxymethylfurfural, and p-toluenesulfonic acid to the primary mixture in sequence, mix for 5 minutes, then add dispersant, anti-aging agent, plasticizer, and antioxidant, mix for 3 minutes until the material becomes a homogeneous viscoelastic mass, discharge the material, cool it, and cut it into small particles, where the small particles are asphalt modifiers.
[0079] A method for preparing environmentally friendly plastomer-modified asphalt, the method comprising:
[0080] S10, taking an asphalt modifier and heating it to 80° C. in an oven to melt it, wherein the raw materials of the asphalt modifier are 25 parts of polyhydroxyalkanoate, 5 parts of bagasse fiber, 2 parts of trimethylaminoethylpiperazine, 1 part of 5-hydroxymethylfurfural, 1 part of p-toluenesulfonic acid, 0.3 parts of aluminum hydroxide, 0.1 parts of dispersant, 0.5 parts of anti-aging agent, 0.8 parts of environmentally friendly plasticizer, and 0.2 parts of antioxidant;
[0081] S20, placing petroleum heavy traffic asphalt 70# in an oven and heating it to 160°C to melt it, adding the asphalt modifier to the melted petroleum heavy traffic asphalt 70# and shearing it with a shearing machine (the speed is set to 4kr / min) for 50 minutes to obtain an environmentally friendly plastic modified asphalt.
[0082] An environmentally friendly plastomer-modified asphalt is used for asphalt pavement construction, the asphalt pavement construction comprising:
[0083] S100, carry out roadbed cleaning and roadbed excavation;
[0084] S200, taking environmentally friendly plastomer-modified asphalt, coarse aggregate, fine aggregate, and mineral filler and heating them to 160° C., and then using an asphalt mixer to mix 40% of the preheated environmentally friendly plastomer-modified asphalt, 40% of the coarse aggregate, 15% of the fine aggregate, and 5% of the mineral filler to obtain an asphalt mixture;
[0085] S300, spreading the mixture on the roadbed, and rolling the spread asphalt mixture multiple times with a road roller to form a smooth road surface.
[0086] Example 4
[0087] An asphalt modifier for preparing environmentally friendly plastomer-modified asphalt, the components of the asphalt modifier are as follows:
[0088] 30 parts of polyhydroxy fatty acid, 10 parts of bagasse fiber, 4 parts of trimethylaminoethylpiperazine, 2 parts of 5-hydroxymethylfurfural, 1.5 parts of p-toluenesulfonic acid, 0.8 parts of aluminum hydroxide, 0.5 parts of dispersant, 0.8 parts of anti-aging agent, 1 part of environmentally friendly plasticizer, and 0.5 parts of antioxidant; wherein the sugarcane fiber is processed as follows:
[0089] The sugarcane bagasse is chopped to facilitate the separation of fibers in the sugarcane bagasse during the boiling process, and some impurities in the sugarcane bagasse are removed by washing. The washed sugarcane is placed in a boiling pot, and appropriate amounts of potassium hydroxide, hydrogen peroxide and ferric oxide are added. The mixture is boiled for 2 hours, taken out, washed and dried to obtain the treated sugarcane bagasse. 50 kg of the treated sugarcane bagasse is dispersed in a solvent (xylene), 6 kg of maleic anhydride and 0.2 kg of benzoyl peroxide are added, and the mixture is heated to 100° C. under nitrogen protection and reacted for 5 hours.
[0090] A method for preparing an asphalt modifier for preparing environmentally friendly plastomer-modified asphalt:
[0091] S1, sugarcane fiber preparation:
[0092] S11, bagasse is chopped, cleaned, boiled, rinsed, and dried to prepare bagasse fiber, and the specific steps are as follows:
[0093] The sugarcane bagasse is chopped to facilitate the separation of fibers in the bagasse during the boiling process, and some impurities in the bagasse are removed by washing. The washed sugarcane is placed in a boiling pot, and appropriate amounts of potassium hydroxide, hydrogen peroxide and ferric oxide are added. The mixture is kept boiling for 2-3 hours, and the bagasse is taken out, washed and dried to obtain the processed bagasse.
[0094] S12, dispersing 50 kg of treated bagasse in a solvent (xylene), adding 6 kg of maleic anhydride and 0.2 kg of benzoyl peroxide, heating to 100° C. under nitrogen protection, and reacting for 5 hours to obtain bagasse fiber;
[0095] S2, taking the polyhydroxyalkanoate, the sugarcane fiber, and aluminum hydroxide, and kneading them for 3-5 minutes until they are preliminarily mixed and uniformly obtained;
[0096] S3, add trimethylaminoethylpiperazine, 5-hydroxymethylfurfural, and p-toluenesulfonic acid to the primary mixture in sequence, and mix for 5-8 minutes, then add dispersant, anti-aging agent, plasticizer, and antioxidant, and mix for 3-5 minutes until the material becomes a homogeneous viscoelastic mass, discharge the material, cool it, and cut it into small particles, where the small particles are asphalt modifiers.
[0097] A method for preparing environmentally friendly plastomer-modified asphalt, the method comprising:
[0098] S10, preparing an asphalt modifier according to the above method, wherein the raw materials of the asphalt modifier are 30 parts of polyhydroxy fatty acid, 10 parts of bagasse fiber, 4 parts of trimethylaminoethylpiperazine, 2 parts of 5-hydroxymethylfurfural, 1.5 parts of p-toluenesulfonic acid, 0.8 parts of aluminum hydroxide, 0.5 parts of dispersant, 0.8 parts of anti-aging agent, 1 part of environmentally friendly plasticizer, and 0.5 parts of antioxidant;
[0099] S20, placing petroleum heavy traffic asphalt 70# in an oven and heating it to 165°C to melt it, adding the asphalt modifier to the melted petroleum heavy traffic asphalt 70# and shearing it with a shearing machine (the speed is set to 6 kr / min) for 50 minutes to obtain an environmentally friendly plastic modified asphalt.
[0100] An environmentally friendly plastomer-modified asphalt is used for asphalt pavement construction, the asphalt pavement construction comprising:
[0101] S100, carry out roadbed cleaning and roadbed excavation;
[0102] S200, heating the environmentally friendly plastomer-modified asphalt, coarse aggregate, fine aggregate, and mineral filler to 165° C., and then mixing the preheated 45% environmentally friendly plastomer-modified asphalt, 30% coarse aggregate, 15% fine aggregate, and 10% mineral filler in an asphalt mixer to obtain an asphalt mixture;
[0103] S300, spreading the mixture on the roadbed, and rolling the spread asphalt mixture multiple times with a road roller to form a smooth road surface.
[0104] Comparative Example 1
[0105] A method for preparing environmentally friendly plastomer-modified asphalt, the method comprising:
[0106] S10, chopping the bagasse to facilitate the separation of fibers from the bagasse during boiling, washing the bagasse to remove some impurities, placing the washed sugarcane in a boiling pot, adding appropriate amounts of sodium hydroxide, hydrogen peroxide, and ferric oxide, maintaining boiling for 2.5 hours, removing the bagasse, washing, and drying to obtain bagasse fiber;
[0107] S20, placing petroleum heavy traffic asphalt 70# in an oven and heating it to 165°C to melt it, adding bagasse fiber to the melted petroleum heavy traffic asphalt 70# and shearing it with a shearing machine (the speed is set to 6kr / min) for 50 minutes to obtain environmentally friendly plastic modified asphalt.
[0108] Comparative Example 2
[0109] An asphalt modifier for preparing environmentally friendly plastomer-modified asphalt, the components of the asphalt modifier are as follows:
[0110] 28 parts of polyhydroxyalkanoate, 8 parts of bagasse fiber, 2 parts of 5-hydroxymethylfurfural, 1 part of p-toluenesulfonic acid, 0.5 parts of aluminum hydroxide, 0.3 parts of dispersant, 0.5 parts of anti-aging agent, 0.8 parts of environmentally friendly plasticizer, and 0.3 parts of antioxidant; wherein the sugarcane fiber is processed as follows:
[0111] The sugarcane bagasse is chopped to facilitate the separation of fibers in the sugarcane bagasse during the boiling process, and some impurities in the sugarcane bagasse are removed by washing. The washed sugarcane is placed in a boiling pot, and appropriate amounts of sodium hydroxide, hydrogen peroxide and ferric oxide are added. The mixture is boiled for 2.5 hours, taken out, washed and dried to obtain the treated sugarcane bagasse. 50 kg of the treated sugarcane bagasse is dispersed in a solvent (xylene), 5 kg of maleic anhydride and 0.15 kg of benzoyl peroxide are added, and the mixture is heated to 85° C. under nitrogen protection and reacted for 5 hours.
[0112] A method for preparing an asphalt modifier for preparing environmentally friendly plastomer-modified asphalt:
[0113] S1, sugarcane fiber preparation:
[0114] S11, bagasse is chopped, cleaned, boiled, rinsed, and dried to prepare bagasse fiber, and the specific steps are as follows:
[0115] The sugarcane bagasse is chopped to facilitate the separation of fibers in the bagasse during the boiling process, and some impurities in the bagasse are removed by washing. The washed sugarcane is placed in a boiling pot, and appropriate amounts of sodium hydroxide, hydrogen peroxide and ferric oxide are added. The mixture is kept boiling for 2.5 hours, and the bagasse is taken out, washed and dried to obtain the treated bagasse.
[0116] S12, dispersing 50 kg of treated bagasse in a solvent (xylene), adding 5 kg of maleic anhydride and 0.15 kg of benzoyl peroxide, heating to 85° C. under nitrogen protection, and reacting for 5 hours to obtain bagasse fiber;
[0117] S2, taking polyhydroxyalkanoate, the sugarcane fiber, and aluminum hydroxide, and kneading them for 4 minutes until they are preliminarily uniformly mixed to obtain a primary mixture;
[0118] S3, add 5-hydroxymethylfurfural and p-toluenesulfonic acid to the primary mixture in sequence, mix for 7 minutes, then add dispersant, anti-aging agent, plasticizer, and antioxidant, mix for 4 minutes until the material becomes a homogeneous viscoelastic mass, discharge the material, cool it, and cut it into small particles. The small particles are asphalt modifiers.
[0119] A method for preparing environmentally friendly plastomer-modified asphalt, the method comprising:
[0120] S10, preparing an asphalt modifier according to the above method, wherein the raw materials of the asphalt modifier are 28 parts of polyhydroxyalkanoate, 8 parts of bagasse fiber, 2 parts of 5-hydroxymethylfurfural, 1 part of p-toluenesulfonic acid, 0.5 parts of aluminum hydroxide, 0.3 parts of dispersant, 0.5 parts of anti-aging agent, 0.8 parts of environmentally friendly plasticizer, and 0.3 parts of antioxidant;
[0121] S20, placing petroleum heavy traffic asphalt 70# in an oven and heating it to 160°C to melt it, adding the asphalt modifier to the melted petroleum heavy traffic asphalt 70# and shearing it with a shearing machine (the speed is set to 6 kr / min) for 50 minutes to obtain an environmentally friendly plastic modified asphalt.
[0122] Comparative Example 3
[0123] An asphalt modifier for preparing environmentally friendly plastomer-modified asphalt, the components of the asphalt modifier are as follows:
[0124] 28 parts of polyether block amide, 8 parts of bagasse fiber, 1 part of p-toluenesulfonic acid, 0.5 parts of aluminum hydroxide, 0.3 parts of dispersant, 0.5 parts of anti-aging agent, 0.8 parts of environmentally friendly plasticizer, and 0.3 parts of antioxidant; wherein the sugarcane fiber is processed as follows:
[0125] The sugarcane bagasse is chopped to facilitate the separation of fibers in the bagasse during the boiling process, and some impurities in the bagasse are removed by washing. The washed sugarcane is placed in a boiling pot and added with appropriate amounts of sodium hydroxide, hydrogen peroxide and ferric oxide. The mixture is kept boiling for 2.5 hours, taken out, washed and dried to obtain the processed bagasse.
[0126] A method for preparing an asphalt modifier for preparing environmentally friendly plastomer-modified asphalt:
[0127] S1, Preparation of Sugarcane Fiber: Chop sugarcane bagasse to facilitate separation of fibers from the bagasse during boiling, wash and remove impurities from the bagasse, place the washed sugarcane in a boiling pot, add appropriate amounts of sodium hydroxide, hydrogen peroxide, and ferric oxide, maintain boiling for 2.5 hours, remove, wash, and dry to obtain sugarcane fiber;
[0128] S2, taking the polyether block amide, the sugarcane fiber, and aluminum hydroxide, and kneading them for 4 minutes until they are initially uniformly mixed to obtain a primary mixture;
[0129] S3, add p-toluenesulfonic acid to the primary mixture in sequence, mix for 7 minutes, then add dispersant, anti-aging agent, plasticizer, and antioxidant, mix for 4 minutes until the material becomes a homogeneous viscoelastic mass, discharge the material, cool it, and cut it into small particles. The small particles are asphalt modifiers.
[0130] A method for preparing environmentally friendly plastomer-modified asphalt, the method comprising:
[0131] S10, preparing an asphalt modifier according to the above method, wherein the raw materials of the asphalt modifier are 28 parts of polyether block amide, 8 parts of bagasse fiber, 1 part of p-toluenesulfonic acid, 0.5 parts of aluminum hydroxide, 0.3 parts of dispersant, 0.5 parts of anti-aging agent, 0.8 parts of environmentally friendly plasticizer, and 0.3 parts of antioxidant;
[0132] S20, placing petroleum heavy traffic asphalt 70# in an oven and heating it to 160°C to melt it, adding the asphalt modifier to the melted petroleum heavy traffic asphalt 70# and shearing it with a shearing machine (the speed is set to 6 kr / min) for 50 minutes to obtain an environmentally friendly plastic modified asphalt.
[0133] Comparative Example 4
[0134] An asphalt modifier for preparing environmentally friendly plastomer-modified asphalt, the components of the asphalt modifier are as follows:
[0135] 28 parts of polyhydroxyalkanoate, 8 parts of bagasse fiber, 3 parts of methyltrimethoxysilane, 2 parts of hexacaric acid, 1 part of p-toluenesulfonic acid, 0.5 parts of aluminum hydroxide, 0.3 parts of dispersant, 0.5 parts of anti-aging agent, 0.8 parts of environmentally friendly plasticizer, and 0.3 parts of antioxidant; wherein the sugarcane fiber is processed as follows:
[0136] The sugarcane bagasse is chopped to facilitate the separation of fibers in the sugarcane bagasse during the boiling process, and some impurities in the sugarcane bagasse are removed by washing. The washed sugarcane is placed in a boiling pot, and appropriate amounts of sodium hydroxide, hydrogen peroxide and ferric oxide are added. The mixture is boiled for 2.5 hours, taken out, washed and dried to obtain the treated sugarcane bagasse. 50 kg of the treated sugarcane bagasse is dispersed in a solvent (xylene), 5 kg of maleic anhydride and 0.15 kg of benzoyl peroxide are added, and the mixture is heated to 85° C. under nitrogen protection and reacted for 5 hours.
[0137] A method for preparing an asphalt modifier for preparing environmentally friendly plastomer-modified asphalt:
[0138] S1, sugarcane fiber preparation:
[0139] S11, bagasse is chopped, cleaned, boiled, rinsed, and dried to prepare bagasse fiber, and the specific steps are as follows:
[0140] The sugarcane bagasse is chopped to facilitate the separation of fibers in the bagasse during the boiling process, and some impurities in the bagasse are removed by washing. The washed sugarcane is placed in a boiling pot, and appropriate amounts of sodium hydroxide, hydrogen peroxide and ferric oxide are added. The mixture is kept boiling for 2.5 hours, and the bagasse is taken out, washed and dried to obtain the treated bagasse.
[0141] S12, dispersing 50 kg of treated bagasse in a solvent (xylene), adding 5 kg of maleic anhydride and 0.15 kg of benzoyl peroxide, heating to 85° C. under nitrogen protection, and reacting for 5 hours to obtain bagasse fiber;
[0142] S2, taking polyhydroxyalkanoate, the sugarcane fiber, and aluminum hydroxide, and kneading them for 4 minutes until they are preliminarily uniformly mixed to obtain a primary mixture;
[0143] S3, add methyltrimethoxysilane, hexacarbic acid, and p-toluenesulfonic acid to the primary mixture in sequence, mix for 7 minutes, then add dispersant, anti-aging agent, plasticizer, and antioxidant, mix for 4 minutes until the material becomes a homogeneous viscoelastic mass, discharge the material, cool it, and cut it into small particles. The small particles are asphalt modifiers.
[0144] A method for preparing environmentally friendly plastomer-modified asphalt, the method comprising:
[0145] S10, preparing an asphalt modifier according to the above method, wherein the raw materials of the asphalt modifier are 28 parts of polyhydroxyalkanoate, 8 parts of bagasse fiber, 3 parts of methyltrimethoxysilane, 2 parts of hexacaric acid, 1 part of p-toluenesulfonic acid, 0.5 parts of aluminum hydroxide, 0.3 parts of dispersant, 0.5 parts of anti-aging agent, 0.8 parts of environmentally friendly plasticizer, and 0.3 parts of antioxidant;
[0146] S20, placing petroleum heavy traffic asphalt 70# in an oven and heating it to 160°C to melt it, adding the asphalt modifier to the melted petroleum heavy traffic asphalt 70# and shearing it with a shearing machine (the speed is set to 6 kr / min) for 50 minutes to obtain an environmentally friendly plastic modified asphalt.
[0147] Samples were prepared with reference to the corresponding standards, and the performance tests were carried out on the modified asphalt concretes in Example 1 and Comparative Examples 1 to 3: the 0.5h immersion Marshall stability and 48h immersion Marshall stability of different samples were tested with reference to JTGE20-2011 "Test Procedures for Asphalt and Asphalt Mixtures in Highway Engineering", and the Marshall stability test was carried out in accordance with T0709-2011.
[0148] Table 1
[0149]
[0150] The freeze-thaw splitting test is conducted in accordance with T0729-2000, and the strength after freeze-thaw cycles is recorded. The porosity and water permeability coefficient are determined as follows: after the sample has passed time t, the head scale difference between time t1 and time t2 on the combined falling head permeameter can be used to evaluate the anti-seepage performance of the asphalt mixture. The permeability coefficient is calculated as follows:
[0151]
[0152] K—permeability coefficient (cm / s);
[0153] h1—hydraulic head of the permeameter at time t1 (cm);
[0154] h2—hydraulic head of the permeameter at time t2 (cm);
[0155] Δt—the time difference between time t1 and time t2 (s);
[0156] α—Internal cross-sectional area of water inlet pipe (cm 2 );
[0157] A—cross-sectional area of specimen (cm 2 );
[0158] H—sample height, using standard Marshall specimen 6.35cm.
[0159] The test was repeated three times for each specimen. If the difference between the results calculated using the above permeability coefficient was less than 10%, the average value was taken as the permeability coefficient of the specimen, as shown in Table 2.
[0160] Table 2
[0161]
[0162] The present invention can be implemented in various ways and is not limited to the embodiments described above. A person skilled in the art will appreciate that the present invention can be implemented in other specific ways without changing the technical concept or essential features of the present invention. Therefore, it should be understood that the embodiments described above are illustrative and not intended to limit the present invention.
Claims
1. An asphalt modifier for preparing environmentally friendly plastomer-modified asphalt, characterized in that: include: 25-30 parts of polyhydroxyalkanoate, 5-10 parts of bagasse fiber, 1-4 parts of trimethylaminoethylpiperazine, 1-3 parts of 5-hydroxymethylfurfural, 1-3 parts of p-toluenesulfonic acid, 0.3-0.8 parts of aluminum hydroxide, 0.1-0.5 parts of dispersant, 0.5-1.0 parts of anti-aging agent, 0.8-1.0 parts of environmentally friendly plasticizer, and 0.2-0.5 parts of antioxidant.
2. The asphalt modifier for preparing environmentally friendly plastomer-modified asphalt according to claim 1, characterized in that: The bagasse fiber is processed as follows: S11, preparing bagasse fiber by chopping, cleaning, boiling, washing, and drying sugarcane bagasse; S12, dispersing the treated sugarcane bagasse in a solvent, adding maleic anhydride and benzoyl peroxide, heating to 80-100° C. under nitrogen protection, reacting for 4-6 hours, washing away the maleic anhydride with acetone, and obtaining bagasse fiber.
3. The asphalt modifier for preparing environmentally friendly plastomer-modified asphalt according to claim 2, characterized in that: The steps of step S11 are specifically as follows: chopping the sugarcane bagasse to facilitate the separation of fibers in the sugarcane bagasse during the boiling process, washing and removing some impurities in the sugarcane bagasse, placing the washed sugarcane in a boiling pot, adding appropriate amounts of alkali solution and oxidant, maintaining boiling for 2-3 hours, taking out, washing and drying, and obtaining treated sugarcane bagasse.
4. The asphalt modifier for preparing environmentally friendly plastomer-modified asphalt according to claim 3, characterized in that: The alkali solution is one of sodium hydroxide and potassium hydroxide.
5. The asphalt modifier for preparing environmentally friendly plastomer-modified asphalt according to claim 3, characterized in that: The oxidants are hydrogen peroxide and ferric oxide.
6. The asphalt modifier for preparing environmentally friendly plastomer-modified asphalt according to claim 2, characterized in that: In step S12, the solvent is one of xylene and ethylbenzene.
7. A method for preparing an environmentally friendly plastomer-modified asphalt, characterized in that: The preparation method comprises: S10, preparing an asphalt modifier according to the preparation method of claims 1-6, wherein the raw materials of the asphalt modifier are 25-30 parts of polyhydroxyalkanoate, 5-10 parts of bagasse fiber, 1-4 parts of trimethylaminoethylpiperazine, 1-3 parts of 5-hydroxymethylfurfural, 1-3 parts of p-toluenesulfonic acid, 0.3-0.8 parts of aluminum hydroxide, 0.1-0.5 parts of dispersant, 0.5-1.0 parts of anti-aging agent, 0.8-1.0 parts of environmentally friendly plasticizer, and 0.2-0.5 parts of antioxidant; S20, placing petroleum heavy traffic asphalt 70# in an oven and heating it to 160-170° C. to melt, mixing the melted petroleum heavy traffic asphalt 70# and the asphalt modifier, and shearing them with a shearing machine for 40-50 minutes to obtain an environmentally friendly plastomer modified asphalt.
8. The method for preparing the environmentally friendly plastomer-modified asphalt according to claim 7, characterized in that: The preparation method of the bagasse fiber is as follows: S11, chopping the bagasse to facilitate the separation of fibers in the bagasse during boiling, washing the bagasse to remove some impurities, placing the washed sugarcane in a boiling pot, adding appropriate amounts of alkali solution and oxidant, and boiling for 2-3 hours, removing the bagasse, washing, and drying to obtain treated bagasse; S12, dispersing the treated sugarcane bagasse in a solvent, adding maleic anhydride and benzoyl peroxide, heating to 80-100° C. under nitrogen protection, reacting for 4-6 hours, washing away the maleic anhydride with acetone, and obtaining bagasse fiber.
9. The method for preparing the environmentally friendly plastomer-modified asphalt according to claim 7, characterized in that: The rotation speed of the shearing machine is set to 4-10kr / min.
10. An application of the environmentally friendly plastomer-modified asphalt according to claims 7-9, characterized in that: The environmentally friendly plastomer-modified asphalt is used for asphalt pavement construction, and the asphalt pavement construction includes: S100, carry out roadbed cleaning and roadbed excavation; S200, heating the environmentally friendly plastomer-modified asphalt, coarse aggregate, fine aggregate, and mineral filler to 160° C., and then mixing the preheated 45-55% environmentally friendly plastomer-modified asphalt, 25-30% coarse aggregate, 10-15% fine aggregate, and 10-15% mineral filler in an asphalt mixer to obtain an asphalt mixture; S300, spreading the mixture on the roadbed, and rolling the spread asphalt mixture multiple times with a road roller to form a smooth road surface.