CN112961377A - Preparation method of road particle fiber - Google Patents
Preparation method of road particle fiber Download PDFInfo
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- CN112961377A CN112961377A CN202110218819.5A CN202110218819A CN112961377A CN 112961377 A CN112961377 A CN 112961377A CN 202110218819 A CN202110218819 A CN 202110218819A CN 112961377 A CN112961377 A CN 112961377A
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- asphalt
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/12—Powdering or granulating
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2397/00—Characterised by the use of lignin-containing materials
- C08J2397/02—Lignocellulosic material, e.g. wood, straw or bagasse
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2495/00—Bituminous materials, e.g. asphalt, tar or pitch
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The invention discloses a preparation method of road particle fibers, which comprises the following steps: firstly, crushing wood fibers to obtain crushed wood fibers; secondly, mixing the asphalt or the modified asphalt with the crushed wood fibers to obtain a fiber asphalt mixture; thirdly, stirring the fiber asphalt mixture; granulating to obtain a fiber asphalt precursor; and fifthly, drying the fiber pitch precursor to obtain the road particle fiber. According to the invention, the broken wood fibers are sprayed into the mixing bin in a cyclone mode through high-pressure air, the asphalt or modified asphalt forms fog-like liquid drop floating objects through the high-pressure air and the nozzle, the asphalt or modified asphalt is effectively wrapped on the surface layer of the broken wood fibers, and the coating film is formed on the surface of the broken wood fibers, so that the forming is easier in the granulating process, the problems of poor forming and poor granulating forming of the existing road particle fibers are effectively solved, and the problem of performance reduction in the transportation and use processes is solved.
Description
Technical Field
The invention belongs to the technical field of road construction, and particularly relates to a preparation method of road particle fibers.
Background
In domestic road construction, in order to cope with increasingly heavy road loads, a number of novel pavement structures are gradually introduced and designed. In the implementation, a part of special materials are added in the original preparation of the asphalt mixture and are used for improving the durability and comfort of roads, most of additives are convenient to accurately put, transport and store and are better and uniformly mixed with the mixture, and the additives are usually prepared into granular state in advance.
With the popularization and application of novel pavement structures, although some granular fibers appear in the market, the granular fiber additives produced by adopting rigid extrusion forming equipment often lose a certain amount of failures (namely the loss of the granular form) to form another form in the transportation process due to jolt, extrusion and storage, namely a mixture of flocculent fibers and granular fibers, which is called as semi-granular fibers. The problems of uneven putting, easy damping, conveying adhesion and the like of the semi-granular fibers can occur in actual application, the fibers can not be well utilized as a stabilizer in the normal use of the asphalt mixture, and the fibers are uniformly mixed with stone materials and other materials and are reduced when entering a mixing pot of an asphalt mixing plant.
At present, the domestic fiber granulation is generally carried out by hard extrusion molding. The hard extrusion easily causes that the particle fiber is too hard and is not easy to disperse in the using process, only the hardness is reduced in order to ensure the dispersity in the using process, the particle fiber cannot be molded after the hardness is reduced, and the particle shape is easily lost in the transportation process.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a method for preparing road particulate fiber, aiming at the defects of the prior art. The method comprises the steps of spraying broken wood fibers into a mixing bin in a cyclone mode through high-pressure air, forming fog-shaped liquid drop floating objects by asphalt or modified asphalt through the high-pressure air and a nozzle, enabling the fog-shaped liquid drop floating objects formed by the broken wood fibers and the asphalt or the modified asphalt to form vortex in a closed cavity, effectively wrapping the asphalt or the modified asphalt on the surface layer of the broken wood fibers, and forming a coating on the surface of the broken wood fibers, so that the broken wood fibers are easier to form in a granulating process, effectively solving the problems of poor forming and poor granulating forming of the existing road particle fibers, and solving the problem of performance reduction in the transportation and use processes.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: a preparation method of road particle fiber is characterized by comprising the following steps:
crushing wood fibers to obtain crushed wood fibers;
step two, mixing the asphalt or the modified asphalt with the crushed wood fiber obtained in the step one to obtain a fiber asphalt mixture; the mixing process comprises the following steps: spraying the crushed wood fibers into a mixing bin in a cyclone mode through high-pressure air, and spraying asphalt or modified asphalt into the mixing bin in an atomization mode through the high-pressure air and a nozzle;
step three, stirring the fiber asphalt mixture obtained in the step two;
step four, granulating the fiber asphalt mixture stirred in the step three to obtain a fiber asphalt precursor;
and step five, drying the fiber asphalt precursor obtained in the step four to obtain the road particle fiber.
The invention sprays broken wood fiber into the mixing chamber by high pressure air in cyclone mode in mixing process, forms mist liquid drop floater by asphalt or modified asphalt by high pressure air and nozzle, uses aerodynamic principle to make mist liquid drop floater formed by broken wood fiber and asphalt or modified asphalt form vortex in the closed mixing chamber cavity, to mix mist liquid drop and broken wood fiber, to obtain fiber asphalt mixture, stirs the fiber asphalt mixture to strengthen the mixing uniformity of broken wood fiber and asphalt or modified asphalt, the invention reduces the water ratio of road particle fiber by drying, to make the water ratio of road particle fiber meet the product requirement, especially when using emulsified asphalt, because adding large amount of water to prepare in the preparation process of emulsified asphalt, by drying, to ensure the water ratio of road particle fiber to meet the product requirement, the granular wood fiber wrapped with asphalt or modified asphalt is prepared.
The preparation method of the road particle fiber is characterized in that the length of the broken wood fiber in the step one is not more than 6 mm. The invention controls the particle size of the road particle fiber by controlling the length of the wood fiber, is beneficial to the dispersion of the road particle fiber in the later use process, and ensures that the prepared road particle fiber meets the use requirement.
The preparation method of the road particle fiber is characterized in that the asphalt in the step two is No. 70 heavy traffic road asphalt or No. 90 heavy traffic road asphalt, and the modified asphalt is SBS modified asphalt, SBR modified asphalt or emulsified asphalt; the emulsified asphalt is prepared from No. 70 heavy traffic road asphalt or No. 90 heavy traffic road asphalt and a median crack type cationic asphalt emulsifier according to the mass ratio of 1 (0.005-0.007). When the asphalt and various modified asphalts are used, the used adhesive needs to be heated before mixing, so that the mixing is convenient, when the emulsified asphalt is used, the emulsified asphalt does not need to be heated before mixing, more energy does not need to be wasted for continuous heat preservation, and resources are saved.
The preparation method of the road granular fibers is characterized in that in the second step, the mass ratio of the asphalt or the modified asphalt to the crushed wood fibers is (3-20): (80-97), and the pressure of the high-pressure air is 7-9 MPa. The invention ensures that the prepared road particle fiber meets the use requirement and ensures the use performance of the obtained road particle fiber by controlling the mass ratio of the asphalt or the modified asphalt to the crushed wood fiber.
The preparation method of the road granular fiber is characterized in that the granulation in the step four is carried out by adopting a granulator, and the fiber asphalt precursor is in a cylindrical structure with the length not more than 16mm and the diameter of 3.9-4.1 mm or 6.4-6.6 mm. The road particle fiber is granulated by using the granulator, and the size of the granulated road particle fiber is controlled, so that the road particle fiber is favorably dispersed in the later use process, and the prepared road particle fiber meets the use requirement.
The preparation method of the road granular fiber is characterized in that the drying in the fifth step is carried out by adopting a continuous overheating type drying oven, the drying temperature is 120-160 ℃, and the moisture content of the road granular fiber is less than 5%. The invention ensures that the moisture content of the obtained road granular fiber meets the use requirement by controlling the drying temperature.
Compared with the prior art, the invention has the following advantages:
1. the method mixes the broken wood fiber and the asphalt or the modified asphalt, effectively wraps the asphalt or the modified asphalt on the surface layer of the broken wood fiber, and forms a coating on the surface of the broken wood fiber, so that the forming is easier in the granulating process, the road particle fiber is prepared, the problems of poor forming and granulating forming in the prior art and the problem of performance reduction in the transportation and use processes are effectively solved, and the method is more convenient for transportation, metering and putting in the practical application process and has a certain protection effect on the fiber under the high-temperature working condition of the use.
2. According to the invention, the broken wood fibers are sprayed into the mixing bin in a cyclone mode through high-pressure air, and the asphalt or modified asphalt forms mist-shaped liquid drop floaters through the high-pressure air and the nozzle, so that the mist-shaped liquid drop floaters formed by the broken wood fibers and the asphalt or modified asphalt form a vortex in the closed mixing bin cavity, the mixing of the mist-shaped liquid drops and the broken wood fibers is achieved, the problem of agglomeration in the full mixing process of the asphalt and the fibers is effectively solved, the mixing efficiency is higher and more uniform, and the fiber asphalt mixture which is fully and uniformly mixed is obtained.
3. When the asphalt and various modified asphalts are used, the used adhesive needs to be heated before mixing, so that the mixing is convenient, when the emulsified asphalt is used, the emulsified asphalt does not need to be heated before mixing, more energy does not need to be wasted for continuous heat preservation, resources are saved, and the asphalt can be selected according to actual production needs.
4. According to the invention, through drying treatment, moisture introduced in the preparation process is removed, and the moisture content of the obtained road granular fiber is ensured to meet the use requirement.
5. The invention uses asphalt or modified asphalt as the adhesive of the road granular fiber for granulation, meets the requirement of JT/T533-2020 standard on the content of the granulating agent, and the prepared road granular fiber meets the requirement of JT/T533-2020 standard on granular wood fiber.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
FIG. 1 is a flow chart of the preparation of road particulate fiber according to the present invention.
Detailed Description
The present invention is described in detail in examples 1 to 7.
Example 1
The embodiment comprises the following steps:
crushing wood fibers to obtain crushed wood fibers; the length of the broken wood fiber is 1 mm-6 mm.
Step two, mixing the asphalt with the crushed wood fibers obtained in the step one to obtain a fiber asphalt mixture; the mixing process comprises the following steps: spraying the crushed wood fibers into a mixing bin in a cyclone mode through high-pressure air, and spraying asphalt or modified asphalt into the mixing bin in an atomization mode through the high-pressure air and a nozzle; the asphalt is No. 70 heavy traffic road asphalt; the mass ratio of the asphalt to the broken wood fibers is 10: 90, the pressure of the high-pressure air is 9 MPa;
step three, stirring the fiber asphalt mixture obtained in the step two;
step four, granulating the fiber asphalt mixture stirred in the step three to obtain a fiber asphalt precursor; the granulation is carried out by adopting a granulator, and the fiber asphalt precursor is in a cylindrical structure with the length of 1-16 mm and the diameter of 3.9-4.1 mm;
step five, drying the fiber asphalt precursor obtained in the step four to obtain road particle fibers; the drying is carried out by adopting a continuous overheating type oven, and the drying temperature is 120 ℃.
Through detection, the moisture content of the road particle fiber prepared by the embodiment is 2%, the residue of the dried asphalt of the road particle fiber accounts for 15% of the mass of the road particle fiber, and the prepared road particle fiber meets the requirement of JT/T533-2020 standard.
Example 2
The embodiment comprises the following steps:
crushing wood fibers to obtain crushed wood fibers; the length of the broken wood fiber is 1 mm-6 mm.
Step two, mixing the asphalt with the crushed wood fibers obtained in the step one to obtain a fiber asphalt mixture; the mixing process comprises the following steps: spraying the crushed wood fibers into a mixing bin in a cyclone mode through high-pressure air, and spraying asphalt or modified asphalt into the mixing bin in an atomization mode through the high-pressure air and a nozzle; the asphalt is No. 90 heavy traffic road asphalt; the mass ratio of the asphalt to the broken wood fibers is 12: 88, the pressure of the high-pressure air is 9 MPa;
step three, stirring the fiber asphalt mixture obtained in the step two;
step four, granulating the fiber asphalt mixture stirred in the step three to obtain a fiber asphalt precursor; the granulation is carried out by adopting a granulator, and the fiber asphalt precursor is in a cylindrical structure with the length of 1-16 mm and the diameter of 6.4-6.6 mm;
step five, drying the fiber asphalt precursor obtained in the step four to obtain road particle fibers; the drying is carried out by adopting a continuous overheating type oven, and the drying temperature is 120 ℃.
Through detection, the moisture content of the road particle fiber prepared by the embodiment is 2%, the residue of the dried asphalt of the road particle fiber accounts for 15% of the mass of the road particle fiber, and the prepared road particle fiber meets the requirement of JT/T533-2020 standard.
Example 3
The embodiment comprises the following steps:
crushing wood fibers to obtain crushed wood fibers; the length of the broken wood fiber is 1 mm-6 mm.
Step two, mixing the modified asphalt with the crushed wood fibers obtained in the step one to obtain a fiber asphalt mixture; the mixing process comprises the following steps: spraying the crushed wood fibers into a mixing bin in a cyclone mode through high-pressure air, and spraying the modified asphalt into the mixing bin in an atomization mode through the high-pressure air and a nozzle; the modified asphalt is emulsified asphalt; the emulsified asphalt is prepared from No. 70 heavy traffic road asphalt and a median crack type cationic asphalt emulsifier in a mass ratio of 1: 0.006; the mass ratio of the asphalt or modified asphalt to the broken wood fibers is 20: 80, the pressure of the high-pressure air is 7 MPa;
step three, stirring the fiber asphalt mixture obtained in the step two;
step four, granulating the fiber asphalt mixture stirred in the step three to obtain a fiber asphalt precursor; the granulation is carried out by adopting a granulator, and the fiber asphalt precursor is in a cylindrical structure with the length of 1-16 mm and the diameter of 3.9-4.1 mm;
step five, drying the fiber asphalt precursor obtained in the step four to obtain road particle fibers; the drying is carried out by adopting a continuous overheating type oven, and the drying temperature is 160 ℃.
Through detection, the moisture content of the road particle fiber prepared by the embodiment is 4%, the residue of the dried asphalt of the road particle fiber accounts for 15% of the mass of the road particle fiber, and the prepared road particle fiber meets the requirement of JT/T533-2020 standard.
Example 4
The embodiment comprises the following steps:
crushing wood fibers to obtain crushed wood fibers; the length of the broken wood fiber is 1 mm-6 mm.
Step two, mixing the modified asphalt with the crushed wood fibers obtained in the step one to obtain a fiber asphalt mixture; the mixing process comprises the following steps: spraying the crushed wood fibers into a mixing bin in a cyclone mode through high-pressure air, and spraying the modified asphalt into the mixing bin in an atomization mode through the high-pressure air and a nozzle; the modified asphalt is emulsified asphalt; the emulsified asphalt is prepared from No. 90 heavy traffic road asphalt and a medium-split cationic asphalt emulsifier in a mass ratio of 1: 0.005; the mass ratio of the asphalt or modified asphalt to the broken wood fibers is 18: 82, the pressure of the high-pressure air is 7 MPa;
step three, stirring the fiber asphalt mixture obtained in the step two;
step four, granulating the fiber asphalt mixture stirred in the step three to obtain a fiber asphalt precursor; the granulation is carried out by adopting a granulator, and the fiber asphalt precursor is in a cylindrical structure with the length of 1-16 mm and the diameter of 6.4-6.6 mm;
step five, drying the fiber asphalt precursor obtained in the step four to obtain road particle fibers; the drying is carried out by adopting a continuous overheating type oven, and the drying temperature is 160 ℃.
Through detection, the moisture content of the road particle fiber prepared by the embodiment is 4%, the residue of the dried asphalt of the road particle fiber accounts for 15% of the mass of the road particle fiber, and the prepared road particle fiber meets the requirement of JT/T533-2020 standard.
Example 5
The embodiment comprises the following steps:
crushing wood fibers to obtain crushed wood fibers; the length of the broken wood fiber is 1 mm-6 mm.
Step two, mixing the modified asphalt with the crushed wood fibers obtained in the step one to obtain a fiber asphalt mixture; the mixing process comprises the following steps: spraying the crushed wood fibers into a mixing bin in a cyclone mode through high-pressure air, and spraying the modified asphalt into the mixing bin in an atomization mode through the high-pressure air and a nozzle; the modified asphalt is emulsified asphalt; the emulsified asphalt is prepared from No. 70 heavy traffic road asphalt and a median crack type cationic asphalt emulsifier in a mass ratio of 1: 0.007; the mass ratio of the asphalt or modified asphalt to the broken wood fibers is 16: 84, the pressure of the high-pressure air is 7 MPa;
step three, stirring the fiber asphalt mixture obtained in the step two;
step four, granulating the fiber asphalt mixture stirred in the step three to obtain a fiber asphalt precursor; the granulation is carried out by adopting a granulator, and the fiber asphalt precursor is in a cylindrical structure with the length of 1-16 mm and the diameter of 3.9-4.1 mm;
step five, drying the fiber asphalt precursor obtained in the step four to obtain road particle fibers; the drying is carried out by adopting a continuous overheating type oven, and the drying temperature is 160 ℃.
Through detection, the moisture content of the road particle fiber prepared by the embodiment is 4%, the residue of the dried asphalt of the road particle fiber accounts for 15% of the mass of the road particle fiber, and the prepared road particle fiber meets the requirement of JT/T533-2020 standard.
Example 6
The embodiment comprises the following steps:
crushing wood fibers to obtain crushed wood fibers; the length of the broken wood fiber is 1 mm-6 mm.
Step two, mixing the modified asphalt with the crushed wood fibers obtained in the step one to obtain a fiber asphalt mixture; the mixing process comprises the following steps: spraying the crushed wood fibers into a mixing bin in a cyclone mode through high-pressure air, and spraying the modified asphalt into the mixing bin in an atomization mode through the high-pressure air and a nozzle; the modified asphalt is SBS modified asphalt; the mass ratio of the modified asphalt to the broken wood fiber is 3: 97, the pressure of the high-pressure air is 8 MPa;
step three, stirring the fiber asphalt mixture obtained in the step two;
step four, granulating the fiber asphalt mixture stirred in the step three to obtain a fiber asphalt precursor; the granulation is carried out by adopting a granulator, and the fiber asphalt precursor is in a cylindrical structure with the length of 1-16 mm and the diameter of 6.4-6.6 mm;
step five, drying the fiber asphalt precursor obtained in the step four to obtain road particle fibers; the drying is carried out by adopting a continuous overheating type oven, and the drying temperature is 140 ℃.
Through detection, the moisture content of the road particle fiber prepared by the embodiment is 3%, the residue of the dried asphalt of the road particle fiber accounts for 15% of the mass of the road particle fiber, and the prepared road particle fiber meets the requirement of JT/T533-2020 standard.
Example 7
The embodiment comprises the following steps:
crushing wood fibers to obtain crushed wood fibers; the length of the broken wood fiber is 1 mm-6 mm.
Step two, mixing the modified asphalt with the crushed wood fibers obtained in the step one to obtain a fiber asphalt mixture; the mixing process comprises the following steps: spraying the crushed wood fibers into a mixing bin in a cyclone mode through high-pressure air, and spraying the modified asphalt into the mixing bin in an atomization mode through the high-pressure air and a nozzle; the modified asphalt is SBR modified asphalt; the mass ratio of the modified asphalt to the broken wood fiber is 5: 95, the pressure of the high-pressure air is 8 MPa;
step three, stirring the fiber asphalt mixture obtained in the step two;
step four, granulating the fiber asphalt mixture stirred in the step three to obtain a fiber asphalt precursor; the granulation is carried out by adopting a granulator, and the fiber asphalt precursor is in a cylindrical structure with the length of 1-16 mm and the diameter of 6.4-6.6 mm;
step five, drying the fiber asphalt precursor obtained in the step four to obtain road particle fibers; the drying is carried out by adopting a continuous overheating type oven, and the drying temperature is 140 ℃.
Through detection, the moisture content of the road particle fiber prepared by the embodiment is 3%, the residue of the dried asphalt of the road particle fiber accounts for 15% of the mass of the road particle fiber, and the prepared road particle fiber meets the requirement of JT/T533-2020 standard.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Any simple modification, change and equivalent changes of the above embodiments according to the technical essence of the invention are still within the protection scope of the technical solution of the invention.
Claims (6)
1. A preparation method of road particle fiber is characterized by comprising the following steps:
crushing wood fibers to obtain crushed wood fibers;
step two, mixing the asphalt or the modified asphalt with the crushed wood fiber obtained in the step one to obtain a fiber asphalt mixture; the mixing process comprises the following steps: spraying the crushed wood fibers into a mixing bin in a cyclone mode through high-pressure air, and spraying asphalt or modified asphalt into the mixing bin in an atomization mode through the high-pressure air and a nozzle;
step three, stirring the fiber asphalt mixture obtained in the step two;
step four, granulating the fiber asphalt mixture stirred in the step three to obtain a fiber asphalt precursor;
and step five, drying the fiber asphalt precursor obtained in the step four to obtain the road particle fiber.
2. The method as claimed in claim 1, wherein the length of the crushed wood fiber is not more than 6mm in the first step.
3. The method for preparing road granular fiber according to claim 1, wherein the asphalt in step two is No. 70 heavy traffic road asphalt or No. 90 heavy traffic road asphalt, and the modified asphalt is SBS modified asphalt, SBR modified asphalt or emulsified asphalt; the emulsified asphalt is prepared from No. 70 heavy traffic road asphalt or No. 90 heavy traffic road asphalt and a median crack type cationic asphalt emulsifier according to the mass ratio of 1 (0.005-0.007).
4. The preparation method of the road granular fiber as claimed in claim 1, wherein the mass ratio of the asphalt or modified asphalt to the broken wood fiber in the second step is (3-20): (80-97), and the pressure of the high-pressure air is 7-9 MPa.
5. The method for preparing road granular fibers according to claim 1, wherein the granulating in the fourth step is performed by using a granulator, and the fiber pitch precursor is in a cylindrical structure with the length of not more than 16mm and the diameter of 3.9-4.1 mm or 6.4-6.6 mm.
6. The method for preparing the road granular fiber according to claim 1, wherein the drying in the fifth step is performed by using a continuous overheating type oven, the drying temperature is 120-160 ℃, and the water content of the road granular fiber is less than 5%.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB515146A (en) * | 1938-04-26 | 1939-11-28 | Frederick William Valle Jones | Improvements in or relating to bituminous compositions and more particularly such as are adapted for use in the construction of roads, footways and the like |
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2021
- 2021-02-26 CN CN202110218819.5A patent/CN112961377B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB515146A (en) * | 1938-04-26 | 1939-11-28 | Frederick William Valle Jones | Improvements in or relating to bituminous compositions and more particularly such as are adapted for use in the construction of roads, footways and the like |
| CN1405372A (en) * | 2002-08-20 | 2003-03-26 | 东北大学 | Method for preparing lignocellulose for road |
| CN109705600A (en) * | 2018-12-28 | 2019-05-03 | 广州鸿绵合成材料有限公司 | A kind of high-performance ligno cellulose fiber and preparation method |
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| 中国科学技术学会主编: "《颗粒学学科发展报告2009-2010》", 30 April 2010, 北京：中国科学技术出版社 * |
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| 陈晓龙: "颗粒状路用木质纤维的制备", 《矿冶》 * |
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