CN108314357A - A kind of cocoanut fiber asphalt and preparation method thereof - Google Patents
A kind of cocoanut fiber asphalt and preparation method thereof Download PDFInfo
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- CN108314357A CN108314357A CN201810048423.9A CN201810048423A CN108314357A CN 108314357 A CN108314357 A CN 108314357A CN 201810048423 A CN201810048423 A CN 201810048423A CN 108314357 A CN108314357 A CN 108314357A
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- 235000013162 Cocos nucifera Nutrition 0.000 title claims abstract description 152
- 244000060011 Cocos nucifera Species 0.000 title claims abstract description 149
- 239000000835 fiber Substances 0.000 title claims abstract description 148
- 239000010426 asphalt Substances 0.000 title claims abstract description 121
- 238000002360 preparation method Methods 0.000 title claims abstract description 40
- 238000001035 drying Methods 0.000 claims abstract description 15
- 238000003756 stirring Methods 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 238000010008 shearing Methods 0.000 claims abstract description 3
- 239000000203 mixture Substances 0.000 claims description 43
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 42
- 239000004567 concrete Substances 0.000 claims description 10
- 239000004575 stone Substances 0.000 claims description 10
- 239000013521 mastic Substances 0.000 claims description 9
- 238000007654 immersion Methods 0.000 claims description 2
- 238000010348 incorporation Methods 0.000 claims description 2
- 239000002689 soil Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 16
- 231100000252 nontoxic Toxicity 0.000 abstract description 3
- 230000003000 nontoxic effect Effects 0.000 abstract description 3
- 238000002156 mixing Methods 0.000 description 22
- 239000000463 material Substances 0.000 description 16
- 239000000243 solution Substances 0.000 description 12
- 238000007580 dry-mixing Methods 0.000 description 11
- 239000000843 powder Substances 0.000 description 11
- 238000012360 testing method Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 4
- 241000737241 Cocos Species 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000000844 anti-bacterial effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 230000009916 joint effect Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000012783 reinforcing fiber Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- 241001484259 Lacuna Species 0.000 description 1
- VCUFZILGIRCDQQ-KRWDZBQOSA-N N-[[(5S)-2-oxo-3-(2-oxo-3H-1,3-benzoxazol-6-yl)-1,3-oxazolidin-5-yl]methyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C1O[C@H](CN1C1=CC2=C(NC(O2)=O)C=C1)CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F VCUFZILGIRCDQQ-KRWDZBQOSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- JLQUFIHWVLZVTJ-UHFFFAOYSA-N carbosulfan Chemical compound CCCCN(CCCC)SN(C)C(=O)OC1=CC=CC2=C1OC(C)(C)C2 JLQUFIHWVLZVTJ-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000010903 husk Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/18—Waste materials; Refuse organic
- C04B18/24—Vegetable refuse, e.g. rice husks, maize-ear refuse; Cellulosic materials, e.g. paper, cork
- C04B18/248—Vegetable refuse, e.g. rice husks, maize-ear refuse; Cellulosic materials, e.g. paper, cork from specific plants, e.g. hemp fibres
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Botany (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Road Paving Structures (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a kind of cocoanut fiber asphalt and preparation method thereof, which includes cocoanut fiber and asphalt, and preparation method includes following preparation process：Step 1, cocoanut fiber is placed in aqueous slkali and is impregnated, cleaned, drying to constant weight, and shearing obtains chopped cocoanut fiber, spare；Step 2, chopped cocoanut fiber is mixed in asphalt, mixes and stirs, obtains cocoanut fiber asphalt.The cocoanut fiber asphalt of gained of the invention has higher high-temperature stability, low-temperature cracking-resistance and anti-water damage property, with stronger pavement performance, preparation method is simple, raw material is cheap and easy to get, at low cost, it is environmental-friendly nontoxic, it is of great significance using quality and durability to improving asphalt highway.
Description
Technical field
The present invention relates to highway engineering asphalt pavement material technical fields, and in particular to a kind of cocoanut fiber asphalt
And preparation method thereof.
Background technology
With flourishing for highway communication cause, bituminous paving has become the primary structure of China Higher grade highway pavement
Form.Bituminous paving is exposed among natural environment, subject for a long time vehicular load repeated action and natural environment it is direct
It influences, causes the diseases such as high temperature track, cold cracking, Moisture Damage and fatigue to take place frequently, and failure mechanism complexity is various so that pitch
Pavement life shortens, and maintenance cost greatly increases.In consideration of it, how to effectively improve asphalt material property itself at
For one of the hot spot of lasting research, such as pitch is modified, optimizes mineral aggregate gradation composition, add enhancing in asphalt
Fiber etc..Wherein, when carrying out fibre modification to asphalt, fiber crisscross 3 D multi-directional distribution wherein can be played
Good thickening, reinforcement, bridge joint and blocking effect are effectively improved asphalt mastic and Asphalt Mixture Performance, promote pitch
Pavement usage quality, prolonging service life of pavement.Currently, the fiber asphalt for the advantages that having both function admirable and simple construction technology
Mixture is widely applied in highway engineering, is had a extensive future.
Coconut is important one of the economic fruit in South China Tropical area, abundance.Cocoanut fiber is using discarded
Coconut husk, a kind of nuisanceless, the environmentally protective pure natural fiber raw material obtained after impregnating, beaing, clean, dry is fine
The diameter of dimension is between 0.1~0.53mm, density 1.150g/cm3, tensile strength is 108~252MPa, Young's modulus is
2.5~6.0GPa, elongation at break are 15%~40%, the characteristics such as strong, moisture-proof, ventilative, antibacterial with toughness.Currently, coconut
Fiber is widely used in the production and processing of palm fibre pad and the filler etc. of cushion, mattress, sofa.Meanwhile as a kind of unique day
Right reinforcing fiber, when cocoanut fiber extrusion molten, have longer fiber alignment mobility, in enhancing composite material machinery
Energy aspect has huge potentiality.The advantages that more, cheap, comprehensive performance is superior based on its quantity, the research of the fiber and
Turned waste into wealth using being one kind, the major action benefited the nation and the people.Currently, there is not yet cocoanut fiber is applied to modified asphalt mixture
Preparation method report.
Invention content
For problems of the prior art, the purpose of the present invention is to provide a kind of cocoanut fiber asphalt and
Preparation method, the cocoanut fiber asphalt have higher high-temperature stability, low-temperature cracking-resistance and anti-water damage property,
With stronger pavement performance, preparation method is simple, and raw material is cheap and easy to get, at low cost, environmental-friendly nontoxic, to improving highway
Bituminous paving is of great significance using quality and durability.
In order to achieve the above object, the present invention is achieved by the following scheme.
(1) a kind of cocoanut fiber asphalt, including following raw material：Cocoanut fiber and asphalt.
Preferably, the length that the cocoanut fiber is is 3-6mm.
Preferably, the asphalt is bituminous concrete mixture (AC asphalts) or asphalt-mastic-broken stone
Mixture (SMA asphalts).
Preferably, the quality of the cocoanut fiber accounts for the 0.2%-0.3% of the bituminous concrete mixture quality, described
Bitumen aggregate ratio in bituminous concrete mixture is 4.5%-5.5%.
Preferably, the quality of the cocoanut fiber accounts for the stone mastic asphalt 0.3%-0.5%, the drip
Bitumen aggregate ratio in green mastic-broken stone mixture is 5.5%-6.5%.
(2) a kind of preparation method of cocoanut fiber asphalt, including following preparation process：
Step 1, cocoanut fiber is placed in aqueous slkali and is impregnated, cleaned, drying to constant weight, and shearing obtains chopped cocoanut fiber,
It is spare；
Step 2, it by the chopped cocoanut fiber incorporation asphalt, mixes and stirs, obtains cocoanut fiber asphalt.
Preferably, in step 1, the aqueous slkali is NaOH solution, a concentration of 1.0%-1.5% of the NaOH solution.
Preferably, in step 1, the time of the immersion is 1-2h.
Preferably, in step 1, the temperature of the drying is 100-110 DEG C.
Preferably, in step 2, the asphalt is that bituminous concrete mixture or asphalt-mastic-broken stone mix
Material.
Preferably, in step 2, when the asphalt is bituminous concrete mixture, the temperature mixed and stirred is
150-160 DEG C, the time mixed and stirred is 240-300s；It is described to mix when the asphalt is stone mastic asphalt
The temperature of sum is 170-180 DEG C, and the time mixed and stirred is 240-300s.
Preferably, in step 2, the concrete technology mixed and stirred is：First the chopped cocoanut fiber is mixed with the pitch
The dry mixing 80-100s that gathers materials in material is closed, the pitch wet-mixing 80-100s in asphalt is added later, it is mixed finally to mix pitch
The miberal powder closed in material mixes and stirs 80-100s.
Compared with prior art, beneficial effects of the present invention are：
The present invention changes asphalt by mixing cocoanut fiber after alkaline solution treatment into asphalt
Property, cocoanut fiber asphalt obtained has higher high-temperature stability, low-temperature cracking-resistance and water stability, has excellent
Pavement performance, preparation method is easy, and raw material is cheap and easy to get, at low cost, environmental-friendly nontoxic, be suitable for large-scale production and
Using.The cocoanut fiber asphalt of gained of the invention can be widely used in high-grade highway asphalt surface course, to improving
Asphalt highway is of great significance using quality and durability, and cocoanut fiber is made to be fully used, and opens coconut
The road new way of fiber.
The cocoanut fiber used in the cocoanut fiber asphalt of the present invention is a kind of nuisanceless, environmentally protective pure day
Right reinforcing fiber, has that toughness is strong, tensile strength is big, a variety of excellent performances such as corrosion-resistant and moisture-proof, antibacterial, and energy absorption
Ability is good, impact strength is high, without brittle fracture.Cocoanut fiber is made of the cell of different type, queueing discipline, and center has one
A prodigious lacuna, and cell is almost rounded；Fiber surface is rougher, has visual defects and irregular micropore, is conducive to
Improve the adhesiveness of fiber and pitch.Cocoanut fiber is not decomposed at 250 DEG C or less, and 200 DEG C or less are never degenerated, and therefore, can be used as
A kind of fiber stabilizer is spiked into reinforcing agent in asphalt, is distributed by crisscross 3 D multi-directional, is given full play to it
Good thickening, reinforcement, bridge joint and blocking effect, are effectively improved asphalt mastic and Asphalt Mixture Performance.
Specific implementation mode
Embodiment of the present invention is described in detail below in conjunction with embodiment, but those skilled in the art will
It will be appreciated that the following example is merely to illustrate the present invention, and it is not construed as limiting the scope of the invention.
Embodiment 1
A kind of preparation method of cocoanut fiber asphalt, including following preparation process：
Step 1, cocoanut fiber is placed in a concentration of 1%NaOH solution and impregnates 1h, by the coconut after basification with clearly
Water cleans, and drying to constant weight in 105 DEG C of baking oven, and cocoanut fiber is sheared to 3mm, obtains chopped cocoanut fiber, spare；
Step 2, chopped cocoanut fiber is mixed in AC asphalts, technique is specifically mixed and stirred in the uniform mixing at 155 DEG C
For：First by the dry mixing 90s that gathers materials in chopped cocoanut fiber and AC asphalts, the pitch in AC asphalts is added later
Wet-mixing 90s, the miberal powder finally mixed in AC asphalts mix and stir 90s, obtain cocoanut fiber asphalt；Wherein, be chopped coconut palm
The bitumen aggregate ratio that subbundle accounts for 0.2%, the AC asphalts of AC quality of asphalt mixtures is 4.8%.
Embodiment 2
A kind of preparation method of cocoanut fiber asphalt, including following preparation process：
Step 1, cocoanut fiber is placed in a concentration of 1.5%NaOH solution and impregnates 1.5h, by the coconut after basification
It is cleaned with clear water, drying to constant weight in 100 DEG C of baking oven, and cocoanut fiber is sheared to 5mm, obtains chopped cocoanut fiber, spare；
Step 2, chopped cocoanut fiber is mixed in AC asphalts, technique is specifically mixed and stirred in the uniform mixing at 160 DEG C
For：First by the dry mixing 80s that gathers materials in chopped cocoanut fiber and AC asphalts, the pitch in AC asphalts is added later
Wet-mixing 80s, the miberal powder finally mixed in AC asphalts mix and stir 80s, obtain cocoanut fiber asphalt；Wherein, be chopped coconut palm
The bitumen aggregate ratio that subbundle accounts for 0.25%, the AC asphalts of AC quality of asphalt mixtures is 5.0%.
Embodiment 3
A kind of preparation method of cocoanut fiber asphalt, including following preparation process：
Step 1, cocoanut fiber is placed in a concentration of 1.2%NaOH solution and impregnates 2.0h, by the coconut after basification
It is cleaned with clear water, drying to constant weight in 110 DEG C of baking oven, and cocoanut fiber is sheared to 6mm, obtains chopped cocoanut fiber, spare；
Step 2, chopped cocoanut fiber is mixed in AC asphalts, technique is specifically mixed and stirred in the uniform mixing at 150 DEG C
For：First by the dry mixing 100s that gathers materials in chopped cocoanut fiber and AC asphalts, the drip in AC asphalts is added later
Green wet-mixing 100s, the miberal powder finally mixed in AC asphalts mix and stir 100s, obtain cocoanut fiber asphalt；Wherein, short
The bitumen aggregate ratio for cutting 0.3%, the AC asphalts that cocoanut fiber accounts for AC quality of asphalt mixtures is 5.2%.
Embodiment 4
A kind of preparation method of cocoanut fiber asphalt, including following preparation process：
Step 1, cocoanut fiber is placed in a concentration of 1.0%NaOH solution and impregnates 1.0h, by the coconut after basification
It is cleaned with clear water, drying to constant weight in 105 DEG C of baking oven, and cocoanut fiber is sheared to 3mm, obtains chopped cocoanut fiber, spare；
Step 2, chopped cocoanut fiber is mixed in SMA asphalts, work is specifically mixed and stirred in the uniform mixing at 175 DEG C
Skill is：First by the dry mixing 90s that gathers materials in chopped cocoanut fiber and SMA asphalts, it is added in SMA asphalts later
Pitch wet-mixing 90s, the miberal powder finally mixed in SMA asphalts mix and stir 90s, obtain cocoanut fiber asphalt；Wherein, short
The bitumen aggregate ratio for cutting 0.4%, the SMA asphalts that cocoanut fiber accounts for SMA quality of asphalt mixtures is 6.0%.
Embodiment 5
A kind of preparation method of cocoanut fiber asphalt, including following preparation process：
Step 1, cocoanut fiber is placed in a concentration of 1.5%NaOH solution and impregnates 1.5h, by the coconut after basification
It is cleaned with clear water, drying to constant weight in 100 DEG C of baking oven, and cocoanut fiber is chopped to 5mm, obtains chopped cocoanut fiber, spare；
Step 2, chopped cocoanut fiber is mixed in SMA asphalts, work is specifically mixed and stirred in the uniform mixing at 178 DEG C
Skill is：First by the dry mixing 80s that gathers materials in chopped cocoanut fiber and SMA asphalts, it is added in SMA asphalts later
Pitch wet-mixing 80s, the miberal powder finally mixed in SMA asphalts mix and stir 80s, obtain cocoanut fiber asphalt；Wherein, short
The bitumen aggregate ratio for cutting 0.3%, the SMA asphalts that cocoanut fiber accounts for SMA quality of asphalt mixtures is 5.8%.
Embodiment 6
A kind of preparation method of cocoanut fiber asphalt, including following preparation process：
Step 1, cocoanut fiber is placed in a concentration of 1.25%NaOH solution and impregnates 2.0h, by the coconut after basification
It is cleaned with clear water, drying to constant weight in 110 DEG C of baking oven, and cocoanut fiber is sheared to 6mm, obtains chopped cocoanut fiber, spare；
Step 2, chopped cocoanut fiber is mixed in SMA asphalts, work is specifically mixed and stirred in the uniform mixing at 180 DEG C
Skill is：First by the dry mixing 100s that gathers materials in chopped cocoanut fiber and SMA asphalts, it is added in SMA asphalts later
Pitch wet-mixing 100s, finally mix SMA asphalts in miberal powder mix and stir 100s, obtain cocoanut fiber asphalt；Its
In, the bitumen aggregate ratio that chopped cocoanut fiber accounts for 0.5%, the SMA asphalts of SMA quality of asphalt mixtures is 6.2%.
Embodiment 7
A kind of preparation method of cocoanut fiber asphalt, including following preparation process：
Step 1, cocoanut fiber is placed in a concentration of 1.25%NaOH solution and impregnates 1h, the coconut after basification is used
Clear water cleans, and drying to constant weight in 105 DEG C of baking oven, and cocoanut fiber is sheared to 4.5mm, obtains chopped cocoanut fiber, spare；
Step 2, chopped cocoanut fiber is mixed in AC asphalts, technique is specifically mixed and stirred in the uniform mixing at 155 DEG C
For：First by the dry mixing 90s that gathers materials in chopped cocoanut fiber and AC asphalts, the pitch in AC asphalts is added later
Wet-mixing 80s, the miberal powder finally mixed in AC asphalts mix and stir 100s, obtain cocoanut fiber asphalt；Wherein, be chopped coconut palm
The bitumen aggregate ratio that subbundle accounts for 0.2%, the AC asphalts of AC quality of asphalt mixtures is 4.5%.
Embodiment 8
A kind of preparation method of cocoanut fiber asphalt, including following preparation process：
Step 1, cocoanut fiber is placed in a concentration of 1.5%NaOH solution and impregnates 1h, the coconut after basification is used
Clear water cleans, and drying to constant weight in 105 DEG C of baking oven, and cocoanut fiber is sheared to 4.5mm, obtains chopped cocoanut fiber, spare；
Step 2, chopped cocoanut fiber is mixed in AC asphalts, technique is specifically mixed and stirred in the uniform mixing at 150 DEG C
For：First by the dry mixing 100s that gathers materials in chopped cocoanut fiber and AC asphalts, the drip in AC asphalts is added later
Green wet-mixing 80s, the miberal powder finally mixed in AC asphalts mix and stir 90s, obtain cocoanut fiber asphalt；Wherein, it is chopped
The bitumen aggregate ratio that cocoanut fiber accounts for 0.2%, the AC asphalts of AC quality of asphalt mixtures is 5.5%.
Embodiment 9
A kind of preparation method of cocoanut fiber asphalt, including following preparation process：
Step 1, cocoanut fiber is placed in a concentration of 1.25%NaOH solution and impregnates 2.0h, by the coconut after basification
It is cleaned with clear water, drying to constant weight in 110 DEG C of baking oven, and cocoanut fiber is sheared to 6mm, obtains chopped cocoanut fiber, spare；
Step 2, chopped cocoanut fiber is mixed in SMA asphalts, work is specifically mixed and stirred in the uniform mixing at 175 DEG C
Skill is：First by the dry mixing 80s that gathers materials in chopped cocoanut fiber and SMA asphalts, it is added in SMA asphalts later
Pitch wet-mixing 100s, the miberal powder finally mixed in SMA asphalts mix and stir 90s, obtain cocoanut fiber asphalt；Wherein,
The bitumen aggregate ratio that chopped cocoanut fiber accounts for 0.5%, the SMA asphalts of SMA quality of asphalt mixtures is 6.5%.
Embodiment 10
A kind of preparation method of cocoanut fiber asphalt, including following preparation process：
Step 1, cocoanut fiber is placed in a concentration of 1.25%NaOH solution and impregnates 2.0h, by the coconut after basification
It is cleaned with clear water, drying to constant weight in 105 DEG C of baking oven, and cocoanut fiber is sheared to 6mm, obtains chopped cocoanut fiber, spare；
Step 2, chopped cocoanut fiber is mixed in SMA asphalts, work is specifically mixed and stirred in the uniform mixing at 170 DEG C
Skill is：First by the dry mixing 90s that gathers materials in chopped cocoanut fiber and SMA asphalts, it is added in SMA asphalts later
Pitch wet-mixing 80s, the miberal powder finally mixed in SMA asphalts mix and stir 100s, obtain cocoanut fiber asphalt；Wherein,
The bitumen aggregate ratio that chopped cocoanut fiber accounts for 0.5%, the SMA asphalts of SMA quality of asphalt mixtures is 5.5%.
Comparative example 1
The bitumen aggregate ratio of a kind of matrix pitch compound, matrix pitch compound is 4.7%.
In above example 1-10, SMA asphalts are SMA-13 asphalts, and AC asphalts are AC-13
Asphalt；1 mesostroma asphalt of comparative example is AC-13 asphalts；SMA-13 asphalts and AC-
The specific grading of 13 asphalts is as shown in table 1.
Table 1
By the matrix pitch compound of 1 gained of cocoanut fiber asphalt and comparative example obtained by embodiment 1-6
It is prepared into marshal piece, rut test piece and girder low-temperature bending test specimen respectively, and respectively to the high-temperature stability of test specimen, low temperature
Crack resistance is tested with water stability；The preparation of specific test specimen and its method for testing performance refer to E20-2011 JTG《Highway
Engineering pitch and Asphalt Mixture Experiment regulation》, testing result is as shown in table 2.
Table 2 is chopped cocoanut fiber modified asphalt mixture pavement performance test result
As shown in Table 2, the high-temperature stability, low-temperature cracking-resistance of the cocoanut fiber asphalt obtained by embodiment 1-6 and
Water stability meets respectively《Standard specification for construction and acceptance of highway asphalt pavement》Table 5.3.4-1 asphalt vehicles in JTG F40-2004
Rut tests the requirement of dynamic stability technology, the requirement of table 5.3.4-3 Asphalt Mixture at Low Temperature bend test failure strain technologies and table
5.3.4-2 stability of asphalt mixture inspection technology requires.
Dynamic stability, the flexural-tensile strain of girder maximum and the freeze thawing of cocoanut fiber asphalt obtained by embodiment 1-6 are split
Resistance to spalling shows this than dynamic stability, the flexural-tensile strain of girder maximum and the freeze-thaw split intensity obviously higher than comparative example 1
The cocoanut fiber asphalt of invention gained has higher high-temperature stability, low-temperature cracking-resistance and water stability, illustrates this
Invention cocoanut fiber asphalt has excellent pavement performance, also shows that the technology of the present invention has significant social economy
Benefit.
Although the present invention is described in detail with a general description of the specific embodiments in this specification,
But on the basis of the present invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.
Therefore, these modifications or improvements without departing from theon the basis of the spirit of the present invention, belong to claimed model
It encloses.
Claims (10)
1. a kind of cocoanut fiber asphalt, which is characterized in that including following raw material：Cocoanut fiber and asphalt.
2. cocoanut fiber asphalt according to claim 1, which is characterized in that the length of the cocoanut fiber is 3-
6mm。
3. cocoanut fiber asphalt according to claim 1, which is characterized in that the asphalt is mixed for pitch
Solidifying soil mixture or stone mastic asphalt.
4. cocoanut fiber asphalt according to claim 3, which is characterized in that the quality of the cocoanut fiber accounts for institute
The 0.2%-0.3% of the quality of bituminous concrete mixture is stated, the bitumen aggregate ratio in the bituminous concrete mixture is 4.5%-
5.5%.
5. cocoanut fiber asphalt according to claim 3, which is characterized in that the quality of the cocoanut fiber accounts for institute
State the 0.3%-0.5% of the quality of stone mastic asphalt, the bitumen aggregate ratio in the stone mastic asphalt
For 5.5%-6.5%.
6. a kind of preparation method of cocoanut fiber asphalt, which is characterized in that including following preparation process：
Step 1, cocoanut fiber is placed in aqueous slkali and is impregnated, cleaned, drying to constant weight, and shearing obtains chopped cocoanut fiber, standby
With；
Step 2, it by the chopped cocoanut fiber incorporation asphalt, mixes and stirs, obtains cocoanut fiber asphalt.
7. the preparation method of cocoanut fiber asphalt according to claim 6, which is characterized in that described in step 1
Aqueous slkali is NaOH solution, a concentration of 1.0%-1.5% of the NaOH solution.
8. the preparation method of cocoanut fiber asphalt according to claim 6, which is characterized in that described in step 1
The time of immersion is 1-2h；The temperature of the drying is 100-110 DEG C.
9. the preparation method of cocoanut fiber asphalt according to claim 6, which is characterized in that described in step 2
Asphalt is bituminous concrete mixture or stone mastic asphalt.
10. the preparation method of cocoanut fiber asphalt according to claim 9, which is characterized in that in step 2, institute
State asphalt be bituminous concrete mixture when, the temperature mixed and stirred be 150-160 DEG C, the time mixed and stirred be 240-
300s；When the asphalt is stone mastic asphalt, the temperature mixed and stirred is 170-180 DEG C, is mixed and stirred
Time is 240-300s.
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| CN115612306A (en) * | 2022-11-11 | 2023-01-17 | 长沙理工大学 | Composite modified asphalt and preparation method thereof |
| CN116120756A (en) * | 2023-02-18 | 2023-05-16 | 喜跃发国际环保新材料股份有限公司 | Special modified asphalt and preparation method thereof |
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| CN112921805A (en) * | 2021-03-26 | 2021-06-08 | 广州大学 | Assembled steel-coconut fiber magnesium phosphate cement bridge deck composite beam and construction method |
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