CN111718155A - Asphalt mixture doped with basalt fibers and lignin fibers - Google Patents
Asphalt mixture doped with basalt fibers and lignin fibers Download PDFInfo
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- CN111718155A CN111718155A CN202010527495.9A CN202010527495A CN111718155A CN 111718155 A CN111718155 A CN 111718155A CN 202010527495 A CN202010527495 A CN 202010527495A CN 111718155 A CN111718155 A CN 111718155A
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- fibers
- asphalt mixture
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- asphalt
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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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
- C04B14/46—Rock wool ; Ceramic or silicate fibres
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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
- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B16/02—Cellulosic materials
-
- 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
-
- 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
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
Abstract
The invention discloses an asphalt mixture doped with basalt fibers and lignin fibers, which comprises the following components in percentage by mass: 5.55-5.64% of SBS modified asphalt, 0.285-0.366% of fiber and 93.99-94.16% of mineral aggregate. According to the invention, the basalt fiber and the lignin fiber are compounded according to a certain proportion, the advantages and the disadvantages of the two fibers are utilized to comprehensively improve various performances of the asphalt mixture, the service quality of the SMA asphalt pavement can be effectively improved, the service life of the road is prolonged, the water stability is improved, the comprehensive performance is better, and the economic benefit is better.
Description
Technical Field
The invention belongs to the technical field of road engineering materials, and relates to an asphalt mixture doped with basalt fibers and lignin fibers.
Background
With the rapid development of the road transportation industry in China, the phenomena of more heavy-duty vehicles with large traffic volume and even overload and overrun exist, and meanwhile, the SMA asphalt mixture is influenced by comprehensive factors such as service environment and the like, and provides a higher standard performance requirement for asphalt pavement materials.
The SMA asphalt mixture mainly uses coarse aggregate to make the high-temperature anti-rutting capability strong, the asphalt mastic binding power formed by a large amount of mineral powder, a large amount of asphalt and a small amount of fine aggregate is improved, so that the low-temperature anti-cracking and fatigue resistance of the mixture are improved, the porosity is small, water seepage is not easy, the water stability is good, and the fiber is used as a stabilizer to be doped into the SMA mixture, so that the method is an effective method for improving the comprehensive performance.
The lignin fiber can better adsorb asphalt, and more asphalt mastic is wrapped on the surface of the aggregate, so that the low-temperature performance of the asphalt mixture can be obviously improved. But the lignin fiber has the phenomenon of oil absorption of the hollow tube, and partial asphalt is absorbed into the fiber, so that the thickness of an asphalt oil film is not increased, the strength of a pavement is not improved, the consumption of the asphalt is increased, and the cost is improved; in addition, the lignin fiber has strong water absorption, so that the water stability of the mixture is poor and the durability of the mixture is influenced.
Disclosure of Invention
The invention aims to provide an asphalt mixture doped with basalt fibers and lignin fibers, wherein the water stability can be improved by doping the chopped basalt fibers and lignin fibers into the asphalt mixture in a moderate proportion, and the comprehensive performance of the asphalt mixture is greatly improved compared with that of the asphalt mixture doped with one fiber.
The purpose of the invention is realized by the following technical scheme:
the asphalt mixture doped with basalt fibers and lignin fibers comprises the following components in percentage by mass: 5.55 to 5.64 percent of SBS modified asphalt, 0.285 to 0.366 percent of fiber and 93.99 to 94.16 percent of mineral aggregate.
Further, the mineral aggregate comprises coarse and fine aggregates and mineral powder, wherein the mineral powder accounts for 7% of the total mass of the mineral aggregate, and the 1# material, the 2# material, the 3# material and the 4# material in the coarse and fine aggregates respectively account for 42%, 32%, 0% and 19% of the total mass of the mineral aggregate; the coarse and fine aggregate material is basalt, and the mineral powder is limestone ground with the granularity of less than 0.075 mm.
Further, the fibers comprise chopped basalt fibers and lignin fibers, the length of the chopped basalt fibers is 6mm, and the mass ratio of the basalt fibers to the lignin fibers is 1: 1.
Further, the asphalt mixture adopts SMA-13 discontinuous gradation.
Further, the overall grading ranges of the coarse and fine aggregates and the mineral powder are as follows:
the preparation method of the asphalt mixture doped with basalt fibers and lignin fibers comprises the following steps:
(1) firstly, heating a finished product of SBS modified asphalt in an oven at 165 +/-5 ℃ to a molten state, and preserving heat for later use;
(2) preheating coarse and fine aggregates in the mineral aggregate at 185 +/-5 ℃ for more than 5 hours;
(3) and (2) heating a mixing pot to 180 +/-5 ℃, adding the preheated coarse and fine aggregate into the mixing pot, doping the chopped basalt fiber and the lignin fiber, mixing for 90s, adding the SBS modified asphalt for heat preservation in the step (1), mixing for 90-95 s, doping the mineral powder, and mixing for 90-95 s to prepare the asphalt mixture.
Compared with the prior art, the invention has the following advantages:
(1) the asphalt mixture doped with basalt fibers and lignin fibers can improve the water stability of the asphalt mixture;
(2) the chopped basalt fibers and the lignin fibers are mixed in the asphalt mixture according to the mass ratio of 1:1, so that the advantages of the two fibers can be fully exerted, the comprehensive performance is better than that of the mixture obtained by mixing one fiber singly, and the economic benefit is better.
Detailed Description
The asphalt mixture doped with basalt fibers and lignin fibers according to the present invention will be further described with reference to the following specific examples.
The basalt fiber is a novel green material, the adsorbed asphalt is relatively less, the asphalt consumption is less, the improvement effect of the asphalt mixture is different, the high-temperature anti-rutting capability of the mixture can be obviously improved by doping the basalt fiber, and the anti-fatigue cracking capability of the asphalt mixture is greatly improved. According to the invention, the basalt fiber and the lignin fiber are compounded according to a certain proportion, and the advantages and the disadvantages of the two fibers are utilized to comprehensively improve various performances of the asphalt mixture, so that the service quality of the SMA asphalt pavement can be effectively improved, and the service life of the road is prolonged.
Example 1
Firstly, the SBS modified asphalt is heated to a molten state in an oven at 165 +/-5 ℃, and the temperature is kept for later use. Heating 11559.03g coarse and fine aggregates in advance for more than 5h at 185 +/-5 ℃, and heating the asphalt mixture mixing pot to 180 +/-5 ℃. Firstly heating 11559.03g of preheated coarse and fine aggregates (wherein the mass of the 1# material, the 2# material, the 3# material and the 4# material is 5220.21g, 3977.30g, 0.00g and 2361.52g respectively), mixing the heated 11559.03g of coarse and fine aggregates with 17.03g of chopped basalt fibers and 17.03g of lignin fibers in a mixing pot for 90s, then adding 733.31g of SBS modified asphalt for standby heat preservation in the step (1), mixing for 90-95 s, finally adding 870.04g of mineral powder, mixing for 90-95 s, and preparing the asphalt mixture doped with basalt fibers and lignin fibers.
Example 2
Firstly, the SBS modified asphalt is heated to a molten state in an oven at 165 +/-5 ℃, and the temperature is kept for later use. Heating 11538.74g coarse and fine aggregates in advance for more than 5h at 185 +/-5 ℃, and heating the asphalt mixture mixing pot to 180 +/-5 ℃. Firstly heating 11538.74g of preheated coarse and fine aggregates (wherein the mass of the 1# material, the 2# material, the 3# material and the 4# material is 5211.04g, 3970.32g, 0.00g and 2357.38g respectively), mixing the heated 11538.74g of coarse and fine aggregates with 24.15g of chopped basalt fibers and 24.15g of lignin fibers in a mixing pot for 90s, then adding 744.44g of SBS modified asphalt for standby heat preservation in the step (1), mixing for 90-95 s, finally adding 868.51g of mineral powder, mixing for 90-95 s, and preparing the asphalt mixture doped with basalt fibers and lignin fibers.
Example 3
Firstly, the SBS modified asphalt is heated to a molten state in an oven at 165 +/-5 ℃, and the temperature is kept for later use. Heating 11560.27g coarse and fine aggregates in advance for more than 5h at 185 +/-5 ℃, and heating the asphalt mixture mixing pot to 180 +/-5 ℃. Firstly heating 11560.27g of preheated coarse and fine aggregates (wherein the mass of the 1# material, the 2# material, the 3# material and the 4# material is 5219.41g, 3976.70g, 0.00g and 2361.16g respectively), mixing the heated 11560.27g of coarse and fine aggregates with 19.8g of chopped basalt fibers and 19.8g of lignin fibers in a mixing pot for 90s, then adding 732.07g of SBS modified asphalt for standby heat preservation in the step (1), mixing for 90-95 s, finally adding 869.90g of mineral powder, mixing for 90-95 s, and preparing the asphalt mixture doped with basalt fibers and lignin fibers.
Comparative example 1
Firstly, the SBS modified asphalt is heated to a molten state in an oven at 165 +/-5 ℃, and the temperature is kept for later use. Heating 11560.27g coarse and fine aggregates in advance for more than 5h at 185 +/-5 ℃, and heating the asphalt mixture mixing pot to 180 +/-5 ℃. Firstly heating 11560.27g of preheated coarse and fine aggregates (wherein the mass of the 1# material, the 2# material, the 3# material and the 4# material is 5219.41g, 3976.70g, 0.00g and 2361.16g respectively), mixing the heated 11560.27g of coarse and fine aggregates with 39.6g of chopped basalt fibers in a mixing pot for 90s (namely single-doped chopped basalt fibers), then adding 732.07g of SBS modified asphalt for standby heat preservation in the step (1), mixing for 90-95 s, finally mixing 869.90g of mineral powder and mixing for 90-95 s, and preparing into an asphalt mixture.
Comparative example 2
Firstly, the SBS modified asphalt is heated to a molten state in an oven at 165 +/-5 ℃, and the temperature is kept for later use. Heating 11560.27g coarse and fine aggregates in advance for more than 5h at 185 +/-5 ℃, and heating the asphalt mixture mixing pot to 180 +/-5 ℃. Firstly heating 11560.27g of preheated coarse and fine aggregates (wherein the mass of the 1# material, the 2# material, the 3# material and the 4# material is 5219.41g, 3976.70g, 0.00g and 2361.16g respectively), mixing the heated 11560.27g of coarse and fine aggregates with 39.6g of lignin fibers in a mixing pot for 90s (namely, singly-doped lignin fibers), adding 732.07g of SBS modified asphalt for standby heat preservation in the step (1), mixing for 90-95 s, finally mixing 869.90g of mineral powder for 90-95 s, and preparing the asphalt mixture.
TABLE 1 road Performance test results and Performance evaluation
As can be seen from Table 1, when the basalt fibers and the lignin fibers are blended in a mass ratio of 1:1 to modify the SMA asphalt mixture, the residual stability and the freeze-thaw splitting strength ratio of the modified SMA asphalt mixture are both higher than those of the asphalt mixture only blended with one fiber. The improvement is most obvious, and the water stability is better. The performance of the asphalt mixture is comprehensively evaluated by an efficacy coefficient method, when the chopped basalt fiber and the lignin fiber are mixed according to the mass ratio of 1:1, the road performance comprehensive value of the SMA-13 asphalt mixture is the largest, and the comprehensive road performance of the mixture is better than that of the mixture when one fiber is singly mixed. Therefore, in the aspect of performance benefit, the overall performance of the asphalt mixture which is mixed with the chopped basalt fibers and the lignin fibers in a mass ratio of 1:1 is better by combining with economic benefit analysis.
The present invention has been described above by way of example, but the present invention is not limited to the above-described specific embodiments, and any modification or variation made based on the present invention is within the scope of the present invention as claimed.
Claims (7)
1. The asphalt mixture doped with basalt fibers and lignin fibers is characterized by comprising the following components in percentage by mass: 5.55-5.64% of SBS modified asphalt, 0.285-0.366% of fiber and 93.99-94.16% of mineral aggregate.
2. The method of claim 1, wherein the mineral aggregate comprises coarse and fine aggregates and ore fines, wherein the ore fines account for 7% of the total mass of the mineral aggregate, and the 1# material, the 2# material, the 3# material, and the 4# material in the coarse and fine aggregates account for 42%, 32%, 0%, and 19%, respectively, of the total mass of the mineral aggregate.
3. The method of claim 1, wherein the coarse and fine aggregate material is basalt and the ore fines are limestone ground with a particle size of less than 0.075 mm.
4. The method of claim 1, wherein the fibers comprise chopped basalt fibers and lignin fibers, the chopped basalt fibers having a length of 6mm, and the basalt fibers and the lignin fibers being in a mass ratio of 1: 1.
5. The method of claim 1 wherein the asphalt mixture is a SMA-13 gap grade.
6. The method according to claim 1, characterized in that the overall gradation ranges of coarse and fine aggregates and ore fines are as follows:
。
7. A method for preparing an asphalt mixture according to any one of claims 1 to 6, comprising the steps of:
(1) firstly, heating SBS modified asphalt in a drying oven at 165 +/-5 ℃ to a molten state, and preserving heat for later use;
(2) preheating coarse and fine aggregates in the mineral aggregate at 185 +/-5 ℃ for more than 5 hours;
(3) and (2) heating the mixing pot to 180 +/-5 ℃, adding the preheated coarse and fine aggregate into the mixing pot, doping the fiber and mixing for 90s, then adding the SBS modified asphalt for heat preservation in the step (1) and mixing for 90-95 s, and finally doping the mineral powder and mixing for 90-95 s to prepare the asphalt mixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010527495.9A CN111718155A (en) | 2020-06-11 | 2020-06-11 | Asphalt mixture doped with basalt fibers and lignin fibers |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010527495.9A CN111718155A (en) | 2020-06-11 | 2020-06-11 | Asphalt mixture doped with basalt fibers and lignin fibers |
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| CN111718155A true CN111718155A (en) | 2020-09-29 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112430012A (en) * | 2020-12-10 | 2021-03-02 | 四川炬原玄武岩纤维科技有限公司 | Basalt composite fiber and asphalt mixture containing basalt composite fiber |
| CN112745062A (en) * | 2021-01-05 | 2021-05-04 | 中电建路桥集团有限公司 | Composite fiber modified asphalt mixture with excellent performance and preparation method thereof |
| CN113135693A (en) * | 2021-05-25 | 2021-07-20 | 扬州大学 | Method for interweaving basalt fibers in asphalt mixture |
| CN114763299A (en) * | 2021-01-12 | 2022-07-19 | 达州市华川机械工程技术有限公司 | Method for manufacturing asphalt concrete with composite basalt fibers for roads |
| CN115073063A (en) * | 2022-06-23 | 2022-09-20 | 中建七局交通建设有限公司 | Small-radius long-longitudinal-slope asphalt pavement material and construction process |
| CN115466078A (en) * | 2022-11-03 | 2022-12-13 | 东南大学 | Basalt fine aggregate-doped SMA asphalt mixture and preparation method thereof |
| CN116819054A (en) * | 2023-06-13 | 2023-09-29 | 扬州大学 | Method for determining complex blending proportion of asphalt mixture fibers |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112430012A (en) * | 2020-12-10 | 2021-03-02 | 四川炬原玄武岩纤维科技有限公司 | Basalt composite fiber and asphalt mixture containing basalt composite fiber |
| CN112745062A (en) * | 2021-01-05 | 2021-05-04 | 中电建路桥集团有限公司 | Composite fiber modified asphalt mixture with excellent performance and preparation method thereof |
| CN114763299A (en) * | 2021-01-12 | 2022-07-19 | 达州市华川机械工程技术有限公司 | Method for manufacturing asphalt concrete with composite basalt fibers for roads |
| CN113135693A (en) * | 2021-05-25 | 2021-07-20 | 扬州大学 | Method for interweaving basalt fibers in asphalt mixture |
| CN115073063A (en) * | 2022-06-23 | 2022-09-20 | 中建七局交通建设有限公司 | Small-radius long-longitudinal-slope asphalt pavement material and construction process |
| CN115466078A (en) * | 2022-11-03 | 2022-12-13 | 东南大学 | Basalt fine aggregate-doped SMA asphalt mixture and preparation method thereof |
| CN116819054A (en) * | 2023-06-13 | 2023-09-29 | 扬州大学 | Method for determining complex blending proportion of asphalt mixture fibers |
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