CN111689719A - Basalt fiber reinforced asphalt concrete and preparation method thereof - Google Patents
Basalt fiber reinforced asphalt concrete and preparation method thereof Download PDFInfo
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- CN111689719A CN111689719A CN202010563111.9A CN202010563111A CN111689719A CN 111689719 A CN111689719 A CN 111689719A CN 202010563111 A CN202010563111 A CN 202010563111A CN 111689719 A CN111689719 A CN 111689719A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/26—Bituminous materials, e.g. tar, pitch
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1055—Coating or impregnating with inorganic materials
- C04B20/1066—Oxides, Hydroxides
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2038—Resistance against physical degradation
- C04B2111/2061—Materials containing photocatalysts, e.g. TiO2, for avoiding staining by air pollutants or the like
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- Inorganic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Road Paving Structures (AREA)
Abstract
The invention provides basalt fiber reinforced asphalt concrete and a preparation method thereof, wherein the basalt fiber reinforced asphalt concrete comprises the following components in percentage by mass: 13-25% of matrix asphalt, 53-65% of coarse aggregate, 11-20% of fine aggregate, 1-2% of silica fume, 2-5% of mineral powder and 6-13% of modified basalt fiber, wherein the modified basalt fiber is nano titanium dioxide coated basalt fiber, the modified basalt fiber is used as a reinforcing agent of asphalt concrete, and the prepared asphalt concrete for an asphalt pavement has excellent mechanical property and ultraviolet aging resistance, and can help to absorb and degrade automobile exhaust.
Description
Technical Field
The invention relates to the technical field of concrete, in particular to basalt fiber reinforced asphalt concrete and a preparation method thereof.
Background
Asphalt concrete can be classified into two categories, petroleum asphalt and coal asphalt, according to the binder used. The asphalt pavement paved by the two kinds of asphalt concrete has the advantages of good mechanical strength, abrasion resistance, comfortable driving, small vibration, low noise, simple and convenient construction and the like. With the large scale spread of highway engineering construction, asphalt concrete is widely adopted with its many advantages. However, in the using process of a road, a series of reactions such as oxidation and polymerization can occur to the traditional asphalt concrete material under the action of load and natural environment, which leads to asphalt peeling, fission, rutting, aging, road performance degradation and the like of the road surface, wherein the influence of ultraviolet radiation on the asphalt aging is often ignored, the ultraviolet aging seriously affects the service life of the asphalt concrete, and especially in some provinces with strong sunlight radiation in China, the ultraviolet aging seriously affects the service life of the asphalt road surface. Meanwhile, the number of automobiles is continuously increased, and the pollution of automobile exhaust to the environment becomes an important social problem and needs to be vigorously treated.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide basalt fiber reinforced asphalt concrete and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
the basalt fiber reinforced asphalt concrete comprises the following components in percentage by mass:
13-25% of matrix asphalt
53-65% of coarse aggregate
11-20% of fine aggregate
1 to 2 percent of silica fume
2 to 5 percent of mineral powder
6-13% of modified basalt fibers;
the modified basalt fiber is a basalt fiber coated with nano titanium dioxide. The basalt fiber has the characteristics of excellent mechanical property, stable chemical property, strong asphalt holding capacity and moisture and fire resistance, and the comprehensive performance of asphalt concrete can be improved by doping the basalt fiber into an asphalt mixture; the nano titanium dioxide has excellent ultraviolet absorption capacity, and the basalt fiber coated by the nano titanium dioxide is doped into the asphalt concrete, so that the ultraviolet aging resistance of the asphalt concrete can be effectively improved; in addition, the nano titanium dioxide activates the titanium dioxide under the action of ultraviolet rays to generate free radicals with high catalytic activity, can generate strong photooxidation and reduction capacity, and can catalyze and photolyze various organic matters and partial inorganic matters attached to the surface of an object, so that the nano titanium dioxide can play a role in purifying air, is introduced into asphalt concrete to be used for asphalt pavements, and can help effectively degrade nitrogen oxides in automobile exhaust.
Preferably, the basalt fiber reinforced asphalt concrete is prepared by using basalt, potassium feldspar or granite as the coarse aggregate.
Preferably, the fine aggregate of the basalt fiber reinforced asphalt concrete is river sand or ceramic sand.
Preferably, the mineral powder is lime powder or bentonite.
Preferably, the base asphalt is petroleum asphalt, tar asphalt, natural asphalt or rubber asphalt.
Preferably, the nano titanium dioxide coated basalt fiber is prepared by the following steps:
adding basalt fibers into a phosphoric acid solution with the mass concentration of 30-45%, adding a titanium source, heating to 50-70 ℃ for reaction, and dispersing the titanium source on the surface of the basalt fibers and pre-fixing; stopping the reaction after 1-2 h, filtering, washing with clear water and drying; adding the reacted, cleaned and dried basalt fibers into dilute nitric acid with the mass concentration of 8-15%, and heating to 60-70 ℃ for reaction; stopping the reaction after 0.5-1 h, filtering, washing with clear water, and drying to obtain the basalt fiber coated with the nano titanium dioxide.
Preferably, the mass ratio range of the titanium source, the basalt fibers, the phosphoric acid solution and the dilute nitric acid solution is 1: (1-1.5): (20-25): (20-25).
Further preferably, the titanium source is tetrabutyl titanate, isopropyl titanate or n-butyl titanate.
In addition, the invention provides a preparation method of the basalt fiber reinforced asphalt concrete, which comprises the following steps:
sequentially adding the coarse aggregate, the fine aggregate, the silica fume and the mineral powder into the matrix asphalt, and stirring at 170-180 ℃ and 4000-5500 r/min for 15-20 min to obtain a mixture; adding the modified basalt fibers into the mixture, and stirring at the temperature of 150-160 ℃ and at 3000-4000 r/min for 40-55 min to obtain the basalt fiber reinforced asphalt concrete.
The invention has the beneficial effects that:
(1) the basalt fiber coated with the nano titanium dioxide is prepared by introducing the titanium source, and the excellent ultraviolet absorption capacity of the nano titanium dioxide is utilized to dope the basalt fiber coated with the nano titanium dioxide into the asphalt concrete, so that the ultraviolet aging resistance of the asphalt concrete can be effectively improved;
(2) according to the invention, the modified basalt fiber is doped into the asphalt concrete, so that the prepared basalt fiber reinforced asphalt concrete has excellent mechanical and physical properties and longer service life;
(3) the invention utilizes the photocatalysis performance of the nano titanium dioxide, introduces the nano titanium dioxide into the asphalt concrete for asphalt pavement, can help effectively degrade harmful gases such as nitric oxide, CO and the like in automobile exhaust, and helps purify air.
Detailed Description
The present invention will be further described with reference to specific embodiments; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.
Example 1:
the basalt fiber reinforced asphalt concrete comprises the following components in percentage by mass:
13 percent of petroleum asphalt
60 percent of potassium feldspar
11 percent of pottery sand
1 percent of silica fume
2 percent of bentonite
13% of modified basalt fiber.
The basalt fiber reinforced asphalt concrete is prepared by the following method:
firstly, preparing modified basalt fibers, wherein the preparation method comprises the following steps:
adding basalt fiber into a phosphoric acid solution with the mass concentration of 30%, then adding tetrabutyl titanate, heating to 70 ℃ for reaction, and dispersing the tetrabutyl titanate on the surface of the basalt fiber and pre-fixing; stopping the reaction after 1.5h, filtering, washing with clear water and drying; adding the basalt fiber after reaction, cleaning and drying into dilute nitric acid with the mass concentration of 8%, and heating to 70 ℃ for reaction; stopping reaction after 1h, filtering, washing with clear water, and drying to obtain the basalt fiber coated with nano titanium dioxide, namely the modified basalt fiber. Wherein the mass ratio of the added tetrabutyl titanate, the basalt fiber, the phosphoric acid solution and the dilute nitric acid solution is 1: 1: 25: 25.
after the modified basalt fiber is prepared, sequentially adding potassium feldspar, ceramic sand, silica fume and bentonite into petroleum asphalt according to the mass percentage, and stirring for 18min at the temperature of 170 ℃ and at the speed of 5500r/min to obtain a mixture; adding the modified basalt fiber into the mixture, and stirring at 150 ℃ and 4000r/min for 40min to obtain the basalt fiber reinforced asphalt concrete.
Example 2:
the basalt fiber reinforced asphalt concrete comprises the following components in percentage by mass:
14 percent of tar pitch
Granite 65%
12 percent of pottery sand
1 percent of silica fume
2 percent of bentonite
6% of modified basalt fiber;
the basalt fiber reinforced asphalt concrete is prepared by the following method:
firstly, preparing modified basalt fibers, wherein the preparation method comprises the following steps:
adding basalt fiber into a phosphoric acid solution with the mass concentration of 35%, adding isopropyl titanate, heating to 65 ℃ for reaction, and dispersing the isopropyl titanate on the surface of the basalt fiber and pre-fixing; stopping the reaction after 75min, filtering, washing with clear water and drying; adding the basalt fiber after reaction, cleaning and drying into dilute nitric acid with the mass concentration of 10%, and heating to 65 ℃ for reaction; stopping reaction after 40min, filtering, washing with clear water, and drying to obtain the basalt fiber coated with nano titanium dioxide, namely the modified basalt fiber. Wherein the mass ratio of the added isopropyl titanate, the basalt fiber, the phosphoric acid solution and the dilute nitric acid solution is 1: 1.2: 22: 23.
after the modified basalt fiber is prepared, granite, ceramic sand, silica fume and bentonite are sequentially added into tar pitch according to the mass percentage, and the mixture is obtained after stirring for 20min at the temperature of 170 ℃ and at the speed of 5000 r/min; adding the modified basalt fiber into the mixture, and stirring at 160 ℃ and 3000r/min for 55min to obtain the basalt fiber reinforced asphalt concrete.
Example 3:
the basalt fiber reinforced asphalt concrete comprises the following components in percentage by mass:
25 percent of rubber asphalt
Basalt 53%
11.5 percent of pottery sand
1.5 percent of silica fume
2 percent of bentonite
7% of modified basalt fiber;
the basalt fiber reinforced asphalt concrete is prepared by the following method:
firstly, preparing modified basalt fibers, wherein the preparation method comprises the following steps:
adding basalt fiber into a phosphoric acid solution with the mass concentration of 40%, adding n-butyl titanate, heating to 60 ℃ for reaction, and dispersing and pre-fixing the n-butyl titanate on the surface of the basalt fiber; stopping the reaction after 1h, filtering, washing with clear water and drying; adding the basalt fiber after reaction, cleaning and drying into dilute nitric acid with the mass concentration of 12%, and heating to 65 ℃ for reaction; stopping the reaction after 45min, filtering, washing with clear water, and drying to obtain the basalt fiber coated with the nano titanium dioxide, namely the modified basalt fiber. Wherein the mass ratio of the added n-butyl titanate, the basalt fiber, the phosphoric acid solution and the dilute nitric acid solution is 1: 1.3: 21: 22.
after the modified basalt fiber is prepared, sequentially adding basalt, ceramic sand, silica fume and bentonite into rubber asphalt according to the mass percentage, and stirring at 175 ℃ and 4500r/min for 15min to obtain a mixture; adding the modified basalt fiber into the mixture, and stirring at 155 ℃ and 3500r/min for 50min to obtain the basalt fiber reinforced asphalt concrete.
Example 4:
the basalt fiber reinforced asphalt concrete comprises the following components in percentage by mass:
petroleum asphalt 14%
54 percent of basalt
20 percent of river sand
2 percent of silica fume
Lime powder 3%
7% of modified basalt fiber;
the basalt fiber reinforced asphalt concrete is prepared by the following method:
firstly, preparing modified basalt fibers, wherein the preparation method comprises the following steps:
adding basalt fiber into a phosphoric acid solution with the mass concentration of 45%, adding n-butyl titanate, heating to 50 ℃ for reaction, and dispersing and pre-fixing the n-butyl titanate on the surface of the basalt fiber; stopping the reaction after 2 hours, filtering, washing with clear water and drying; adding the basalt fiber after reaction, cleaning and drying into dilute nitric acid with the mass concentration of 15%, and heating to 60 ℃ for reaction; stopping reaction after 30min, filtering, washing with clear water, and drying to obtain the basalt fiber coated with nano titanium dioxide, namely the modified basalt fiber. Wherein the mass ratio of the added n-butyl titanate, the basalt fiber, the phosphoric acid solution and the dilute nitric acid solution is 1: 1: 20: 20.
after the modified basalt fiber is prepared, sequentially adding basalt, river sand, silica fume and lime powder into petroleum asphalt according to the mass percentage, and stirring at 175 ℃ and 4500r/min for 15min to obtain a mixture; adding the modified basalt fiber into the mixture, and stirring at 155 ℃ and 3500r/min for 50min to obtain the basalt fiber reinforced asphalt concrete.
Example 5:
the basalt fiber reinforced asphalt concrete comprises the following components in percentage by mass:
15 percent of petroleum asphalt
56 percent of basalt
15 percent of river sand
1 percent of silica fume
5 percent of lime powder
8% of modified basalt fiber;
the basalt fiber reinforced asphalt concrete is prepared by the following method:
firstly, preparing modified basalt fibers, wherein the preparation method comprises the following steps:
adding basalt fiber into a phosphoric acid solution with the mass concentration of 32%, adding n-butyl titanate, heating to 65 ℃ for reaction, and dispersing the n-butyl titanate on the surface of the basalt fiber and pre-fixing; stopping reaction after 80min, filtering, washing with clear water, and drying; adding the basalt fiber after reaction, cleaning and drying into dilute nitric acid with the mass concentration of 12%, and heating to 65 ℃ for reaction; stopping reaction after 1h, filtering, washing with clear water, and drying to obtain the basalt fiber coated with nano titanium dioxide, namely the modified basalt fiber. Wherein the mass ratio of the added n-butyl titanate, the basalt fiber, the phosphoric acid solution and the dilute nitric acid solution is 1: 1: 25: 25.
after the modified basalt fiber is prepared, sequentially adding basalt, river sand, silica fume and lime powder into petroleum asphalt according to the mass percentage, and stirring at 180 ℃ and 4000r/min for 20min to obtain a mixture; adding the modified basalt fiber into the mixture, and stirring at 160 ℃ and 4000r/min for 45min to obtain the basalt fiber reinforced asphalt concrete.
Comparative example 1
The basalt fiber reinforced asphalt concrete comprises the following components in percentage by mass:
15 percent of petroleum asphalt
56 percent of basalt
15 percent of river sand
1 percent of silica fume
5 percent of lime powder
Basalt fiber 8%
Sequentially adding the basalt, the river sand, the silica fume and the lime powder into the petroleum asphalt according to the mass percentage, and stirring for 20min at 180 ℃ and 4000r/min to obtain a mixture; adding basalt fibers into the mixture, and stirring at 160 ℃ and 4000r/min for 45min to obtain the basalt fiber reinforced asphalt concrete.
Comparative example 2
The lignin fiber reinforced asphalt concrete comprises the following components in percentage by mass:
petroleum asphalt 14%
54 percent of basalt
20 percent of river sand
2 percent of silica fume
Lime powder 3%
7% of lignin wu-shi fiber;
sequentially adding basalt, river sand, silica fume and lime powder into petroleum asphalt according to the mass percentage, and stirring for 15min at 175 ℃ and 4500r/min to obtain a mixture; adding the lignin fiber into the mixture, and stirring at 155 ℃ and 3500r/min for 50min to obtain the lignin fiber reinforced asphalt concrete.
Testing the basic performance of the asphalt concrete material according to a method in JTGE20-2011 test regulations on road engineering asphalt and asphalt mixtures; standard Marshall test pieces are prepared according to JTGF40-2004 technical Specification for construction of asphalt road surface for road, and the basic performances of the asphalt concrete prepared in the above examples 1-5 and comparative examples 1-2 before and after Ultraviolet (UV) aging test are tested, wherein the UV light source adopts a uniform strip light source, and the UV light intensity is 200W/m2The light irradiation time was 48 hours, and the test results are shown in Table 1.
TABLE 1
Marshall stability, rut dynamic stability, soaking residual stability, and fatigue life are used to characterize the service life of an asphalt pavement. According to the data in table 1, it can be seen that the asphalt concrete reinforced by basalt fiber coated with nano titanium dioxide prepared in examples 1 to 5 of the present invention has higher marshall stability, rutting dynamic stability, soaking residual stability and fatigue life, while the asphalt concrete reinforced by ordinary basalt fiber in comparative example 1 and the asphalt concrete reinforced by lignocellulose in comparative example 2 have slightly lower service lives. After the UV aging test, the service life of the asphalt concrete reinforced with the basalt fiber coated with nano titanium dioxide prepared in examples 1 to 5 of the present invention was slightly reduced, while the service life of the asphalt concrete prepared in comparative examples 1 and 2 was greatly reduced after the UV aging test. The basalt fiber reinforced asphalt concrete prepared by the embodiment of the invention has excellent mechanical and physical properties, and has long service life and good ultraviolet aging resistance.
Further, the air purification tests were conducted on the asphalt concretes obtained in the above examples 1 to 5 and comparative examples 1 to 2. The formed track plates with the size of 20 × 20 × 3cm were prepared from the asphalt concretes prepared in the above examples 1-5 and comparative examples 1-2, respectively, the 7 groups of track plates were placed in a closed tail gas analyzer, the automobile tail gas was introduced, after 1 hour, the change of the gas content in the equipment was tested by a tail gas analyzer, and the air-purifying effect of the asphalt concrete was analyzed, with the test results shown in table 2.
TABLE 2
According to the data in Table 2, it can be seen that the asphalt concrete reinforced by the basalt fiber coated with the nano titanium dioxide prepared in the embodiments 1 to 5 has a certain automobile exhaust absorption and degradation capability, and can effectively absorb NO in the automobile exhaustxHC, CO and CO2Iso gas of NOxThe purification efficiency is most obvious, and the basalt fiber reinforced asphalt concrete prepared by the embodiment of the invention can effectively purify air. Whereas the asphalt concrete prepared in comparative examples 1-2 had almost no air-cleaning ability.
The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.
Claims (9)
1. The basalt fiber reinforced asphalt concrete is characterized by comprising the following components in percentage by mass:
13-25% of matrix asphalt
53-65% of coarse aggregate
11-20% of fine aggregate
1 to 2 percent of silica fume
2 to 5 percent of mineral powder
6-13% of modified basalt fibers;
the modified basalt fiber is a basalt fiber coated with nano titanium dioxide.
2. The basalt fiber-reinforced asphalt concrete according to claim 1, wherein the coarse aggregate is at least one of basalt, potash feldspar, or granite.
3. The basalt fiber-reinforced asphalt concrete according to claim 1, wherein the fine aggregate is at least one of river sand or ceramic sand.
4. The basalt fiber-reinforced asphalt concrete according to claim 1, wherein the mineral powder is at least one of lime powder or bentonite.
5. The basalt fiber-reinforced asphalt concrete according to claim 1, wherein the matrix asphalt is one of petroleum asphalt, tar asphalt, natural asphalt, or rubber asphalt.
6. The basalt fiber-reinforced asphalt concrete according to claim 1, wherein the nano titanium dioxide coated basalt fiber is prepared by the following steps:
adding basalt fibers into a phosphoric acid solution with the mass concentration of 30-45%, adding a titanium source, heating to 50-70 ℃ for reaction, and dispersing the titanium source on the surface of the basalt fibers and pre-fixing;
stopping the reaction after 1-2 h, filtering, washing with clear water and drying; adding the reacted, cleaned and dried basalt fibers into dilute nitric acid with the mass concentration of 8-15%, and heating to 60-70 ℃ for reaction; stopping the reaction after 0.5-1 h, filtering, washing with clear water, and drying to obtain the basalt fiber coated with the nano titanium dioxide.
7. The basalt fiber-reinforced asphalt concrete according to claim 5, wherein the mass ratio of the titanium source, the basalt fiber, the phosphoric acid solution and the dilute nitric acid solution is in a range of 1: (1-1.5): (20-25): (20-25).
8. The basalt fiber-reinforced asphalt concrete according to claim 6, wherein the titanium source is tetrabutyl titanate, isopropyl titanate, or n-butyl titanate.
9. The production method of basalt fiber-reinforced asphalt concrete according to any one of claims 1 to 8, characterized by comprising the steps of:
sequentially adding the coarse aggregate, the fine aggregate, the silica fume and the mineral powder into the matrix asphalt, and stirring at 170-180 ℃ and 4000-5500 r/min for 15-20 min to obtain a mixture; adding the modified basalt fibers into the mixture, and stirring at the temperature of 150-160 ℃ and at 3000-4000 r/min for 40-55 min to obtain the basalt fiber reinforced asphalt concrete.
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| CN114262176A (en) * | 2022-01-04 | 2022-04-01 | 乌鲁木齐汇聚路面工程有限公司 | Asphalt concrete for improving environmental protection performance and preparation method thereof |
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