CN110643187B - Modified fly ash reinforced road asphalt and preparation method thereof - Google Patents
Modified fly ash reinforced road asphalt and preparation method thereof Download PDFInfo
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- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
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Abstract
The invention discloses a modified fly ash reinforced road asphalt and a preparation method thereof, the modified fly ash reinforced road asphalt takes modified fly ash as a modifier, inorganic fiber is obtained by special treatment of the fly ash and is added into matrix asphalt, the performances of wear resistance, rolling resistance, cohesive force and the like of the asphalt can be improved, the fly ash is low in price, and the production cost is reduced while the recycling of solid wastes is realized.
Description
Technical Field
The invention relates to the technical field of engineering materials, in particular to modified fly ash reinforced road asphalt and a preparation method thereof.
Background
Asphalt occupies an important position in highway construction, and most of high-grade pavements in the world adopt asphalt to pave pavements. With the rapid development of the transportation industry, the conditions of heavy load and overload of a traffic road are more common, so that the problems of short service life, prolonged maintenance period and the like of the asphalt pavement are caused. The asphalt has high viscosity, certain fluidity and high temperature sensitivity, and the asphalt with high temperature resistance becomes brittle and hard to crack at low temperature, and the asphalt with high low temperature crack resistance is easy to flow and deform at high temperature to leave ruts on the road surface.
In order to solve the above problems, the current methods used in common use include: the asphalt modifier is used for chemically modifying asphalt and improving the performance of asphalt mixture by adding a modifier, wherein the modifier generally comprises SBS modifier, fiber modifier and the like. When the SBS modifier is added, the performance of the asphalt is improved by adding the SBS modifier into the asphalt, so that the performance of an asphalt road is improved, but the problems that the dispersibility of SBS in the asphalt is poor and the compatibility with an asphalt matrix is poor can occur in the SBS modified asphalt process; the fibers added with the fiber modifier include synthetic fibers, mineral inorganic fibers, plant lignin fibers and the like, and the addition of mineral fibers is the best reinforcing material, but the brittleness is high, the surface polar groups are few, the compatibility with the asphalt organic material is poor, and the mixing type is not good.
Chinese patent CN109971195A discloses a modified asphalt and a preparation method thereof, which comprises the following components in parts by mass: 90-94 parts of matrix asphalt; 43031-5 parts of SBS; SBSLG 5011-2 parts; 1-2 parts of a compatilizer; 0.5-1 part of a ductility enhancer; 0.1-0.3 part of stabilizer. However, the modified asphalt prepared by the patent has poor compatibility of SBS13031 and SBSLG501 with the base asphalt.
Chinese patent CN108117306A discloses a fiber-reinforced asphalt mixture and a preparation method thereof, wherein the raw materials of the asphalt mixture comprise the following components: 2.9 to 5.7 percent of asphalt, 85.2 to 90.7 percent of aggregate, 2.2 to 5.3 percent of mineral powder, 1.5 to 3.8 percent of binder and 1.5 to 2.5 percent of fiber compound, wherein the fiber compound comprises fiber and polymer coating the fiber. The asphalt mixture prepared by the method has short service life, and the fiber composite with a special structure is adopted to modify the asphalt and maintain the integrity of the fibers.
Disclosure of Invention
Aiming at the problems, the invention provides modified fly ash reinforced road asphalt and a preparation method thereof.
The technical scheme adopted by the invention for solving the problems is as follows: a preparation method of modified fly ash reinforced road asphalt comprises the following steps:
step S10, ball-milling and sieving the fly ash, screening particles with the particle size of 400-900 meshes, and placing the particles into a hydrochloric acid solution for treatment for 15-40 minutes to obtain pretreated fly ash;
step S20, mixing and granulating the pretreated fly ash obtained in the step S10 with a silane coupling agent, attapulgite clay, polyvinyl alcohol and dodecyl dimethyl betaine, putting the mixture into a heating furnace, heating the mixture until the particles are molten, and melting and spraying the mixture into filaments by a porous spinneret under pressure to obtain modified fly ash;
step S30, mixing the modified fly ash obtained in the step S20 and carbon fibers in a weight ratio of 10: 1-3.5, placing the mixture into a softening dispersion solution, treating the mixture for 30-60 minutes, and separating and drying the mixture to obtain a reinforcing agent;
step S40, heating 100 parts by weight of matrix asphalt to 165-175 ℃, adding 8-15 parts by weight of the reinforcing agent obtained in the step S30, processing the mixture in a high-speed shearing machine for 8-15 minutes, cooling the mixture to 110-120 ℃, adding 3.6-6.8 parts by weight of butadiene rubber, and continuously stirring the mixture for 8-16 minutes to obtain modified fly ash reinforced road asphalt; the rotating speed of the high-speed shearing machine is 400-700 r/min.
The hydrochloric acid treated fly ash can improve the porosity of the fly ash, has certain adsorption force on asphalt and improves the stability of the fly ash in matrix asphalt; the attapulgite clay can improve the viscosity of the fly ash and the stability of molding granulation; the granulated fly ash can be subjected to pressurized melt spinning to obtain superfine inorganic fibers, the internal structure of the inorganic fibers is loose, tiny capillaries are easily formed, the adsorption force on asphalt is strong, the superfine inorganic fibers are good asphalt stabilizers, the high temperature resistance of the asphalt can be greatly improved, and the weather resistance is improved; in the step S30, the modified fly ash and the carbon fiber are mixed according to a certain proportion and then used as reinforcing agents to improve the high-temperature anti-rutting and low-temperature anti-cracking performance of the matrix asphalt, and the modified fly ash and the carbon fiber are put into a softening dispersion solution to improve the wettability of the fiber surface and the dispersibility and flexibility of the fiber, so that the fiber is more uniformly dispersed in the matrix asphalt, and the functions of reinforcing and toughening are achieved; proper amount of butadiene rubber is added into the matrix asphalt, so that the cold resistance and the aging resistance of the matrix asphalt can be improved, and the service life of the asphalt is prolonged.
Further, in step S10, the concentration of the hydrochloric acid solution is 3.5 wt% to 8 wt%.
Further, in step S20, the fly ash, the silane coupling agent, the attapulgite clay, the polyvinyl alcohol, and the dodecyl dimethyl betaine are, in order by weight, 100 parts, 6 to 15 parts, 1.5 to 6.5 parts, and 3.2 to 7.5 parts.
Further, in step S30, the softened dispersion solution includes, in parts by weight: 100 parts of water, 5-16 parts of vinyl acetate-ethylene copolymer emulsion, 6-14 parts of polyethylene glycol and 3.2-6.5 parts of hydroxyethyl cellulose. The vinyl acetate-ethylene copolymer emulsion has good water resistance, acid and alkali resistance and weather resistance, the price is cheaper than that of similar products, and the fibers are treated and added into the asphalt, so that the anti-cracking and water resistance of the asphalt can be improved.
Further, the vinyl acetate-ethylene copolymer emulsion has a viscosity of 800 mPas to 1000 mPas.
Further, the softening dispersion solution comprises the following components in parts by weight: 100 parts of water, 10.5 parts of vinyl acetate-ethylene copolymer emulsion, 10 parts of polyethylene glycol and 4.8 parts of hydroxyethyl cellulose.
Further, in step S30, the butadiene rubber is one or a mixture of two selected from the group consisting of cis-butadiene rubber 9000 and cis-butadiene rubber 9073.
Further, the butadiene rubber is 9000 and 9073 which are mixed in a weight ratio of 10: 6-15.
Further, in step S40, the base asphalt is selected from one or a mixture of at least two of coal tar asphalt, natural asphalt, biomass tar asphalt, and petroleum asphalt.
The invention also aims to provide modified fly ash reinforced road asphalt prepared by the preparation method.
The invention has the advantages that:
(1) the modified fly ash reinforced road asphalt provided by the invention takes the modified fly ash as a modifier, the inorganic fiber is obtained by special treatment of the fly ash and is added into the matrix asphalt, so that the performances of wear resistance, rolling resistance, cohesive force and the like of the asphalt can be improved, the fly ash is low in price, and the production cost is reduced while the solid waste is recycled;
(2) the modified fly ash reinforced road asphalt prepared by the invention can improve the wettability of the fiber surface and the dispersibility and the flexibility of the fiber by performing softening modification treatment on the modified fly ash and the carbon fiber, so that the fiber is more uniformly dispersed in the matrix asphalt, and the modified fly ash reinforced road asphalt plays roles in reinforcing and toughening;
(3) the modified fly ash reinforced road asphalt prepared by the invention has excellent high-temperature stability, low-temperature crack resistance and fatigue durability, high toughness, high heavy load resistance and high overload capacity, and the preparation method is easy to operate and has remarkable social and economic benefits and popularization and application values.
Detailed Description
The following detailed description of embodiments of the invention, but the invention can be practiced in many different ways, as defined and covered by the claims.
Example 1
A modified fly ash reinforced road asphalt is prepared by the following steps:
step S10, performing ball milling and sieving on the fly ash, screening particles with the particle size of 400-900 meshes, and placing the particles into a hydrochloric acid solution with the concentration of 3.5 wt% for treatment for 20 minutes to obtain pretreated fly ash;
step S20, mixing and granulating the pretreated fly ash obtained in the step S10 with a silane coupling agent, attapulgite clay, polyvinyl alcohol and dodecyl dimethyl betaine, wherein the fly ash, the silane coupling agent, the attapulgite clay, the polyvinyl alcohol and the dodecyl dimethyl betaine are 100 parts, 12 parts, 6.5 parts and 3.2 parts in sequence according to the parts by weight, then placing the mixture into a heating furnace, heating the mixture until the particles are molten, and melting and spraying the mixture into filaments by a porous spinneret under pressure to obtain modified fly ash;
step S30, mixing the modified fly ash obtained in the step S20 and carbon fibers in a weight ratio of 10:1.5, and putting the mixture into a softening dispersion solution, wherein the softening dispersion solution comprises the following components in parts by weight: 100 parts of water, 12 parts of vinyl acetate-ethylene copolymer emulsion, 14 parts of polyethylene glycol and 3.2 parts of hydroxyethyl cellulose, treating for 60 minutes, separating and drying to obtain a reinforcing agent; wherein the viscosity of the vinyl acetate-ethylene copolymer emulsion is 800 mPa.s-1000 Pa.s;
step S40, heating 100 parts by weight of matrix asphalt to 168 ℃, adding 13 parts by weight of the reinforcing agent obtained in the step S30, processing the mixture in a high-speed shearing machine for 8 minutes, cooling the mixture to 120 ℃, adding 4 parts by weight of butadiene rubber, and continuously stirring the mixture for 14 minutes to obtain modified fly ash reinforced road asphalt; wherein the butadiene rubber is 9000 butadiene rubber and 9073 butadiene rubber which are mixed according to the weight ratio of 10:6, the rotating speed of the high-speed shearing machine is 500 r/min, and the matrix asphalt is selected from coal tar asphalt.
Example 2
A modified fly ash reinforced road asphalt is prepared by the following steps:
step S10, ball-milling and sieving the fly ash, screening particles with the particle size of 400 meshes-900 meshes, and placing the particles into a hydrochloric acid solution with the concentration of 5 wt% for treatment for 15 minutes to obtain pretreated fly ash;
step S20, mixing and granulating the pretreated fly ash obtained in the step S10 with a silane coupling agent, attapulgite clay, polyvinyl alcohol and dodecyl dimethyl betaine, wherein the fly ash, the silane coupling agent, the attapulgite clay, the polyvinyl alcohol and the dodecyl dimethyl betaine are 100 parts, 15 parts, 5.5 parts and 7.5 parts in sequence according to the parts by weight, then placing the mixture into a heating furnace, heating the mixture until the particles are molten, and melting and spraying the mixture into filaments by a porous spinneret under pressure to obtain modified fly ash;
step S30, mixing the modified fly ash obtained in the step S20 and carbon fibers in a weight ratio of 10: 1-3.0, and putting the mixture into a softening dispersion solution, wherein the softening dispersion solution comprises the following components in parts by weight: 100 parts of water, 7 parts of vinyl acetate-ethylene copolymer emulsion, 6 parts of polyethylene glycol and 6.0 parts of hydroxyethyl cellulose, treating for 30 minutes, separating and drying to obtain a reinforcing agent; wherein the viscosity of the vinyl acetate-ethylene copolymer emulsion is 800 mPa.s-1000 Pa.s;
step S40, heating 100 parts by weight of matrix asphalt to 175 ℃, adding 10 parts by weight of the reinforcing agent obtained in the step S30, processing the mixture in a high-speed shearing machine for 12 minutes, cooling the mixture to 112 ℃, adding 6.8 parts by weight of butadiene rubber, and continuously stirring the mixture for 8 minutes to obtain modified fly ash reinforced road asphalt; wherein the butadiene rubber is 9000 butadiene rubber and 9073 butadiene rubber which are mixed according to the weight ratio of 10:13, the rotating speed of the high-speed shearing machine is 700 revolutions per minute, and the matrix asphalt is biomass tar asphalt.
Example 3
A modified fly ash reinforced road asphalt is prepared by the following steps:
step S10, performing ball milling and sieving on the fly ash, screening particles with the particle size of 400-900 meshes, and placing the particles into a hydrochloric acid solution with the concentration of 8 wt% for treatment for 35 minutes to obtain pretreated fly ash;
step S20, mixing and granulating the pretreated fly ash obtained in the step S10 with a silane coupling agent, attapulgite clay, polyvinyl alcohol and dodecyl dimethyl betaine, wherein the fly ash, the silane coupling agent, the attapulgite clay, the polyvinyl alcohol and the dodecyl dimethyl betaine are 100 parts, 8 parts, 1.5 parts and 4.5 parts in sequence according to the parts by weight, then placing the mixture into a heating furnace, heating the mixture until the particles are molten, and melting and spraying the mixture into filaments by a porous spinneret under pressure to obtain modified fly ash;
step S30, mixing the modified fly ash obtained in the step S20 and carbon fibers in a weight ratio of 10:1, and putting the mixture into a softening dispersion solution, wherein the softening dispersion solution comprises the following components in parts by weight: 100 parts of water, 16 parts of vinyl acetate-ethylene copolymer emulsion, 12 parts of polyethylene glycol and 4.0 parts of hydroxyethyl cellulose, treating for 50 minutes, separating and drying to obtain a reinforcing agent; wherein the viscosity of the vinyl acetate-ethylene copolymer emulsion is 800 mPa.s-1000 Pa.s;
step S40, heating 100 parts by weight of matrix asphalt to 165 ℃, adding 15 parts by weight of the reinforcing agent obtained in the step S30, processing the mixture in a high-speed shearing machine for 10 minutes, cooling the mixture to 118 ℃, adding 3.6 parts by weight of butadiene rubber, and continuously stirring the mixture for 16 minutes to obtain modified fly ash reinforced road asphalt; wherein, the cis-butadiene rubber is 9000 cis-butadiene rubber, the cis-butadiene rubber 9073 is mixed according to the weight ratio of 10:8, the rotating speed of the high-speed shearing machine is 600 revolutions per minute, and the matrix asphalt is mixture of biomass tar asphalt and petroleum asphalt according to the weight ratio of 1:2.
Example 4
A modified fly ash reinforced road asphalt is prepared by the following steps:
step S10, performing ball milling and sieving on the fly ash, screening particles with the particle size of 400-900 meshes, and placing the particles into a hydrochloric acid solution with the concentration of 7 wt% for treatment for 40 minutes to obtain pretreated fly ash;
step S20, mixing and granulating the pretreated fly ash obtained in the step S10 with a silane coupling agent, attapulgite clay, polyvinyl alcohol and dodecyl dimethyl betaine, wherein the fly ash, the silane coupling agent, the attapulgite clay, the polyvinyl alcohol and the dodecyl dimethyl betaine are 100 parts, 6 parts, 2.5 parts and 6 parts in sequence according to the parts by weight, then placing the mixture into a heating furnace, heating the mixture until the particles are molten, and melting and spraying the mixture into filaments by a porous spinneret under pressure to obtain modified fly ash;
step S30, mixing the modified fly ash obtained in the step S20 and carbon fibers in a weight ratio of 10:3.5, and putting the mixture into a softening dispersion solution, wherein the softening dispersion solution comprises the following components in parts by weight: 100 parts of water, 5 parts of vinyl acetate-ethylene copolymer emulsion, 8 parts of polyethylene glycol and 6.5 parts of hydroxyethyl cellulose, treating for 40 minutes, separating and drying to obtain a reinforcing agent; wherein the viscosity of the vinyl acetate-ethylene copolymer emulsion is 800 mPa.s-1000 Pa.s;
step S40, heating 100 parts by weight of matrix asphalt to 172 ℃, adding 8 parts by weight of the reinforcing agent obtained in the step S30, processing the mixture in a high-speed shearing machine for 15 minutes, cooling the mixture to 110 ℃, adding 6 parts by weight of butadiene rubber, and continuously stirring the mixture for 10 minutes to obtain modified fly ash reinforced road asphalt; wherein the butadiene rubber is 9000 butadiene rubber, the butadiene rubber 9073 is mixed in a weight ratio of 10:15, the rotating speed of the high-speed shearing machine is 400 r/min, and the matrix asphalt is coal tar asphalt and natural asphalt in a weight ratio of 1: 1.
Example 5
A modified fly ash reinforced road asphalt is prepared by the following steps:
step S10, performing ball milling and sieving on the fly ash, screening particles with the particle size of 400-900 meshes, and placing the particles into a hydrochloric acid solution with the concentration of 6 wt% for treatment for 25 minutes to obtain pretreated fly ash;
step S20, mixing and granulating the pretreated fly ash obtained in the step S10 with a silane coupling agent, attapulgite clay, polyvinyl alcohol and dodecyl dimethyl betaine, wherein the fly ash, the silane coupling agent, the attapulgite clay, the polyvinyl alcohol and the dodecyl dimethyl betaine are 100 parts, 10.5 parts, 4.0 parts and 5.3 parts in sequence according to the parts by weight, then placing the mixture into a heating furnace, heating the mixture until the particles are molten, and melting and spraying the mixture into filaments by a porous spinneret under pressure to obtain modified fly ash;
step S30, mixing the modified fly ash obtained in the step S20 and carbon fibers in a weight ratio of 10:2.2, and putting the mixture into a softening dispersion solution, wherein the softening dispersion solution comprises the following components in parts by weight: 100 parts of water, 10.5 parts of vinyl acetate-ethylene copolymer emulsion, 10 parts of polyethylene glycol and 4.8 parts of hydroxyethyl cellulose, treating for 45 minutes, separating and drying to obtain a reinforcing agent; wherein the viscosity of the vinyl acetate-ethylene copolymer emulsion is 800 mPa.s-1000 Pa.s;
step S40, heating 100 parts by weight of matrix asphalt to 170 ℃, adding 11 parts by weight of the reinforcing agent obtained in the step S30, processing the mixture in a high-speed shearing machine for 12 minutes, cooling the mixture to 115 ℃, adding 5.2 parts by weight of butadiene rubber, and continuously stirring the mixture for 12 minutes to obtain modified fly ash reinforced road asphalt; wherein the butadiene rubber is 9000 butadiene rubber, the butadiene rubber 9073 is mixed according to the weight ratio of 10:10.5, the rotating speed of the high-speed shearing machine is 550 revolutions per minute, and the matrix asphalt is coal tar asphalt and the biomass tar asphalt are mixed according to the weight ratio of 1: 2.5.
Comparative example
A modified fly ash reinforced road asphalt is prepared by the following steps:
step S10, performing ball milling and sieving on the fly ash, screening particles with the particle size of 400-900 meshes, and placing the particles into a hydrochloric acid solution with the concentration of 6 wt% for treatment for 25 minutes to obtain pretreated fly ash;
step S20, mixing and granulating the pretreated fly ash obtained in the step S10 with a silane coupling agent, attapulgite clay, polyvinyl alcohol and dodecyl dimethyl betaine, wherein the fly ash, the silane coupling agent, the attapulgite clay, the polyvinyl alcohol and the dodecyl dimethyl betaine are 100 parts, 10.5 parts, 4.0 parts and 5.3 parts in sequence according to the parts by weight, then placing the mixture into a heating furnace, heating the mixture until the particles are molten, and melting and spraying the mixture into filaments by a porous spinneret under pressure to obtain modified fly ash;
step S30, mixing the modified fly ash obtained in the step S20 and carbon fibers in a weight ratio of 10:2.2 to obtain a reinforcing agent;
step S40, heating 100 parts by weight of matrix asphalt to 170 ℃, adding 11 parts by weight of the reinforcing agent obtained in the step S30, and treating in a high-speed shearing machine for 12 minutes to obtain modified fly ash reinforced road asphalt; wherein the rotating speed of the high-speed shearing machine is 550 revolutions per minute, and the matrix asphalt is coal tar asphalt and biomass tar asphalt which are mixed according to the weight ratio of 1: 2.5.
Examples of the experiments
To further illustrate the technological advancement of the present invention, experiments are now taken to further illustrate it.
The modified fly ash reinforced road asphalt prepared by the invention is subjected to performance test, and the result is shown in table 1.
TABLE 1 modified fly ash reinforced road asphalt Performance test
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The preparation method of the modified fly ash reinforced road asphalt is characterized by comprising the following steps:
step S10, ball-milling and sieving the fly ash, screening particles with the particle size of 400-900 meshes, and placing the particles into a hydrochloric acid solution for treatment for 15-40 minutes to obtain pretreated fly ash;
step S20, mixing and granulating the pretreated fly ash obtained in the step S10 with a silane coupling agent, attapulgite clay, polyvinyl alcohol and dodecyl dimethyl betaine, putting the mixture into a heating furnace, heating the mixture until the particles are molten, and melting and spraying the mixture into filaments by a porous spinneret under pressure to obtain modified fly ash;
step S30, mixing the modified fly ash obtained in the step S20 and carbon fibers in a weight ratio of 10: 1-3.5, placing the mixture into a softening dispersion solution, treating the mixture for 30-60 minutes, and separating and drying the mixture to obtain a reinforcing agent;
step S40, heating 100 parts by weight of matrix asphalt to 165-175 ℃, adding 8-15 parts by weight of the reinforcing agent obtained in the step S30, processing the mixture in a high-speed shearing machine for 8-15 minutes, cooling the mixture to 110-120 ℃, adding 3.6-6.8 parts by weight of butadiene rubber, and continuously stirring the mixture for 8-16 minutes to obtain modified fly ash reinforced road asphalt;
in step S30, the softening dispersion solution includes, in parts by weight: 100 parts of water, 5-16 parts of vinyl acetate-ethylene copolymer emulsion, 6-14 parts of polyethylene glycol and 3.2-6.5 parts of hydroxyethyl cellulose.
2. The method of claim 1, wherein the hydrochloric acid solution has a concentration of 3.5 wt% to 8 wt% in step S10.
3. The method for preparing the modified fly ash reinforced road asphalt as claimed in claim 1, wherein in step S20, the fly ash, the silane coupling agent, the attapulgite clay, the polyvinyl alcohol and the dodecyl dimethyl betaine are sequentially 100 parts, 6-15 parts, 1.5-6.5 parts and 3.2-7.5 parts by weight.
4. The method for preparing the modified fly ash reinforced road asphalt as claimed in claim 1, wherein the viscosity of the vinyl acetate-ethylene copolymer emulsion is 800 mPa-s to 1000 Pa-s.
5. The method for preparing the modified fly ash reinforced road asphalt as claimed in claim 1, wherein the softening dispersion solution comprises the following components in parts by weight: 100 parts of water, 10.5 parts of vinyl acetate-ethylene copolymer emulsion, 10 parts of polyethylene glycol and 4.8 parts of hydroxyethyl cellulose.
6. The method for preparing the modified fly ash reinforced road asphalt as claimed in claim 1, wherein in the step S40, the butadiene rubber is one or a mixture of two of cis-butadiene rubber 9000 and cis-butadiene rubber 9073.
7. The preparation method of the modified fly ash reinforced road asphalt as claimed in claim 6, wherein the butadiene rubber is a mixture of 9000 butadiene rubber and 9073 butadiene rubber in a weight ratio of 10: 6-15.
8. The method of claim 1, wherein in step S40, the base asphalt is selected from one or a mixture of at least two of coal tar asphalt, natural asphalt, biomass tar asphalt, and petroleum asphalt.
9. A modified fly ash reinforced road asphalt, which is characterized by being prepared according to the preparation method of any one of claims 1 to 8.
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| JP3155638B2 (en) * | 1992-12-15 | 2001-04-16 | 株式会社三創 | Fly ash fiber |
| CN101250032B (en) * | 2008-03-24 | 2012-11-07 | 上海华明高技术（集团）有限公司 | Technology for coal ash fibre surface treatment and use of asphalt reinforcing modification thereof |
| CN102515554B (en) * | 2011-11-15 | 2014-01-22 | 丁向群 | Inorganic fiber prepared by utilizing industrial tailings and preparation method thereof |
| CN102876057B (en) * | 2012-07-09 | 2015-02-18 | 江苏富祥新材料科技有限公司 | Modified asphalt |
| CN105801006B (en) * | 2016-03-07 | 2017-12-05 | 郑卫忠 | Asphalt for heavy traffic road and preparation method thereof |
| CN109735120A (en) * | 2018-11-15 | 2019-05-10 | 南京交通职业技术学院 | A kind of modification biological asphalt material and preparation method thereof and purposes |
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