CN117447161B - Pavement material containing composite modified asphalt and preparation method and application thereof - Google Patents
Pavement material containing composite modified asphalt and preparation method and application thereof Download PDFInfo
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- CN117447161B CN117447161B CN202311463482.XA CN202311463482A CN117447161B CN 117447161 B CN117447161 B CN 117447161B CN 202311463482 A CN202311463482 A CN 202311463482A CN 117447161 B CN117447161 B CN 117447161B
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- modified asphalt
- asphalt
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- dicyclopentadiene
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- 239000010426 asphalt Substances 0.000 title claims abstract description 183
- 239000000463 material Substances 0.000 title claims abstract description 79
- 239000002131 composite material Substances 0.000 title claims abstract description 54
- 238000002360 preparation method Methods 0.000 title claims abstract description 31
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 44
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 44
- 239000011593 sulfur Substances 0.000 claims abstract description 44
- HECLRDQVFMWTQS-RGOKHQFPSA-N 1755-01-7 Chemical compound C1[C@H]2[C@@H]3CC=C[C@@H]3[C@@H]1C=C2 HECLRDQVFMWTQS-RGOKHQFPSA-N 0.000 claims abstract description 43
- 229920005989 resin Polymers 0.000 claims abstract description 42
- 239000011347 resin Substances 0.000 claims abstract description 42
- 150000003505 terpenes Chemical class 0.000 claims abstract description 39
- 235000007586 terpenes Nutrition 0.000 claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000011230 binding agent Substances 0.000 claims abstract description 12
- 239000004568 cement Substances 0.000 claims abstract description 11
- 239000012615 aggregate Substances 0.000 claims description 34
- 238000002156 mixing Methods 0.000 claims description 26
- 239000011152 fibreglass Substances 0.000 claims description 25
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 21
- 239000002893 slag Substances 0.000 claims description 20
- 238000003756 stirring Methods 0.000 claims description 19
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 16
- 239000011159 matrix material Substances 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 11
- 239000006004 Quartz sand Substances 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000008247 solid mixture Substances 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 238000005303 weighing Methods 0.000 claims description 10
- 239000002699 waste material Substances 0.000 claims description 9
- 229910052763 palladium Inorganic materials 0.000 claims description 8
- 239000003054 catalyst Substances 0.000 claims description 6
- LDUKQFUHJZHLRC-UHFFFAOYSA-N cydecanol Chemical compound C12C=CCC2C2CC(O)C1C2 LDUKQFUHJZHLRC-UHFFFAOYSA-N 0.000 claims description 6
- 238000001354 calcination Methods 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 5
- YJVFFLUZDVXJQI-UHFFFAOYSA-L palladium(ii) acetate Chemical compound [Pd+2].CC([O-])=O.CC([O-])=O YJVFFLUZDVXJQI-UHFFFAOYSA-L 0.000 claims description 4
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 238000011161 development Methods 0.000 claims description 3
- PIBWKRNGBLPSSY-UHFFFAOYSA-L palladium(II) chloride Chemical compound Cl[Pd]Cl PIBWKRNGBLPSSY-UHFFFAOYSA-L 0.000 claims description 3
- 229920001568 phenolic resin Polymers 0.000 claims description 3
- 239000005011 phenolic resin Substances 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 229920001225 polyester resin Polymers 0.000 claims description 2
- 239000004645 polyester resin Substances 0.000 claims description 2
- USFPINLPPFWTJW-UHFFFAOYSA-N tetraphenylphosphonium Chemical compound C1=CC=CC=C1[P+](C=1C=CC=CC=1)(C=1C=CC=CC=1)C1=CC=CC=C1 USFPINLPPFWTJW-UHFFFAOYSA-N 0.000 claims description 2
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims 3
- 238000004519 manufacturing process Methods 0.000 claims 2
- 238000000034 method Methods 0.000 claims 1
- 239000011384 asphalt concrete Substances 0.000 abstract description 23
- 238000003860 storage Methods 0.000 abstract description 14
- 238000010276 construction Methods 0.000 abstract description 9
- 238000005204 segregation Methods 0.000 abstract description 8
- 238000005336 cracking Methods 0.000 abstract description 2
- FACXGONDLDSNOE-UHFFFAOYSA-N buta-1,3-diene;styrene Chemical compound C=CC=C.C=CC1=CC=CC=C1.C=CC1=CC=CC=C1 FACXGONDLDSNOE-UHFFFAOYSA-N 0.000 description 36
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 description 36
- 230000000052 comparative effect Effects 0.000 description 14
- 229920001195 polyisoprene Polymers 0.000 description 6
- 238000012360 testing method Methods 0.000 description 5
- 229920001971 elastomer Polymers 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000003469 silicate cement Substances 0.000 description 3
- 230000001476 alcoholic effect Effects 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000010907 mechanical stirring Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000013001 point bending Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000010998 test method Methods 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Road Paving Structures (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to the field of pavement materials, and particularly discloses a pavement material containing composite modified asphalt, and a preparation method and application thereof. The asphalt concrete comprises the following components in parts by weight: 30-40 parts of sulfur/SBS/terpene resin modified asphalt, 30-40 parts of dicyclopentadiene modified asphalt, 20-30 parts of coarse aggregate, 15-25 parts of fine aggregate, 5-10 parts of binder, 5-10 parts of cement and 10-20 parts of water. The asphalt concrete provided by the invention has excellent storage stability, anti-cracking performance and excellent mechanical property, and effectively solves the technical problems of low dynamic stability and short service life of asphalt concrete pavement caused by poor storage stability, easy segregation and difficult construction of modified asphalt in the prior art.
Description
Technical Field
The invention relates to the field of pavement materials, and particularly discloses a pavement material containing composite modified asphalt, and a preparation method and application thereof.
Background
The asphalt concrete pavement has the advantages of good mechanical property and road performance, flat and seamless pavement, fine vibration reduction, comfortable driving, high traffic safety and the like, and is one of the main materials of the modern road pavement structure. In recent years, as road load levels increase, there is a higher demand for asphalt concrete pavement performance.
In order to improve the comprehensive performance of asphalt concrete pavement, students at home and abroad have made a great deal of researches on asphalt modification, wherein SBS (styrene-butadiene-styrene) modified asphalt and waste rubber modified asphalt are the most common. The waste rubber modified asphalt relieves the recovery pressure of waste rubber to a certain extent, the performances of the modified asphalt material in the aspects of high-temperature stability, low-temperature toughness, fatigue resistance, aging resistance and the like are effectively improved, the durability and the service life of an asphalt concrete pavement are improved, but the waste rubber modified asphalt generally has the problems of high viscosity, poor construction workability, poor compatibility and insufficient storage stability. The SBS modified asphalt has excellent high-low temperature performance, but has poor storage stability and is easy to cause segregation problem, so that the dynamic stability of the asphalt concrete pavement is low, the service life of the asphalt concrete pavement is shortened, and even potential safety hazards of roads are caused. Therefore, the development of asphalt roll concrete with high stability and capable of improving the comprehensive performance of pavement materials has important significance for the field of pavement materials of highways.
Disclosure of Invention
Aiming at the problems of low dynamic stability and short service life of asphalt concrete pavement caused by the poor storage stability and easy segregation and difficult construction of the modified asphalt in the prior art. The invention provides a pavement material containing composite modified asphalt, and a preparation method and application thereof. The asphalt concrete material provided by the invention comprises two modified asphalt, namely sulfur/SBS/terpene resin modified asphalt and dicyclopentadiene modified asphalt, so that the defects of poor compatibility, poor construction workability and the like of common modified asphalt materials are overcome, and the problems of poor storage stability, easy segregation and difficult construction of the common modified asphalt are solved. The asphalt concrete material prepared by combining the two modified asphalt with the material components such as coarse aggregate, fine aggregate, binder, cement, water and the like has the advantages of excellent comprehensive mechanical properties and long service life.
In order to achieve the above purpose, the present invention provides the following technical solutions.
The invention provides a pavement material containing composite modified asphalt, which comprises the following components in parts by mass: 30-40 parts of sulfur/SBS/terpene resin modified asphalt, 30-40 parts of dicyclopentadiene modified asphalt, 20-30 parts of coarse aggregate, 15-25 parts of fine aggregate, 5-10 parts of binder, 5-10 parts of cement and 10-20 parts of water.
Compared with the prior art, the invention provides a pavement material containing composite modified asphalt, and the asphalt concrete comprises two modified asphalt materials of sulfur/SBS/terpene resin modified asphalt and dicyclopentadiene modified asphalt. Wherein, the sulfur/SBS/terpene resin modified asphalt has excellent high-temperature rutting resistance, cracking resistance and storage stability. The addition of sulfur can enhance the polarity of asphalt molecules, so that the free movement of asphalt molecules is limited, the viscosity of asphalt is increased, and the high-temperature performance is improved. The addition of the terpene resin and the sulfur and SBS generate a crosslinking reaction, so that the compatibility of the modified asphalt is improved, the purpose of improving the comprehensive performance of the pavement material is achieved, and meanwhile, the storage stability of the modified asphalt can be improved due to the synergistic effect of the three components, and the segregation phenomenon of the composite modified asphalt is avoided.
Dicyclopentadiene has excellent toughness and rigidity dual mechanical properties, can improve the toughness of modified asphalt, and can prevent irreversible damage to pavement materials caused by repeated actions of pavement rutting, thereby improving the low-temperature extensibility and dynamic stability of the pavement materials. In addition, the invention adopts two modified asphalt compounds to form a certain cross-linked network structure, and combines other components, thereby not only enhancing the compatibility of each component and the storage stability of the pavement material, but also improving the overall performance of the pavement material and prolonging the service life of the pavement material. The invention effectively solves the technical problems of low dynamic stability and short service life of the asphalt concrete pavement caused by the poor storage stability and easy segregation and difficult construction of the modified asphalt in the prior art, and provides more possibility for road construction.
Preferably, the preparation method of the sulfur/SBS/terpene resin modified asphalt comprises the following steps:
s1, heating matrix asphalt to 150-250 ℃, and preserving heat for 2-4 hours to obtain molten asphalt;
s2, uniformly mixing SBS and molten asphalt, mechanically stirring at a rotating speed of 4500-5500 rpm, adding sulfur and terpene resin at 180-200 ℃, uniformly mixing, and developing to obtain the sulfur/SBS/terpene resin modified asphalt.
Further preferably, in S2, the mass ratio of SBS to molten asphalt is 0.3-0.4:1.
Further preferably, in S2, the mechanical stirring time is 1h to 2h.
Further preferably, in S2, the mass ratio of the sulfur, SBS and terpene resin is 0.5-1:10:0.1.
Further preferably, in S2, the specific operation of the development is: and mechanically stirring the mixed asphalt system at a rotating speed of 4000rpm-500rpm for 30min-60min, and standing for 0.5h-2h after stirring is completed.
Preferably, the preparation method of the dicyclopentadiene modified asphalt comprises the following steps: mixing the dicyclopentadiene alcohol solution with matrix asphalt uniformly, adding palladium catalyst, and curing for 4-8 h at 70-90 ℃ to obtain the dicyclopentadiene modified asphalt.
Further preferably, the mass ratio of the dicyclopentadiene alcohol solution to the matrix asphalt is 1-5:100-150, wherein the concentration of dicyclopentadiene in the dicyclopentadiene alcohol solution is 0.1mol/L-0.5mol/L.
Further preferably, the alcoholic solution of dicyclopentadiene is an alcoholic solution of dicyclopentadiene or a methanolic solution of dicyclopentadiene.
Further preferably, the palladium catalyst is any one of palladium acetate, palladium chloride or tetraphenylphosphine palladium.
Further preferably, the mass ratio of the palladium catalyst to the matrix asphalt is 0.1-0.3:50-100.
Preferably, the coarse aggregate is carbonized glass fiber reinforced plastic and quartz sand with the mass ratio of 1-2:5-10.
Preferably, the fine aggregate is steel slag and slag micropowder with the mass ratio of 1:1-2.
Preferably, the binder is any one or more of silicone resin, phenolic resin or polyester resin.
Preferably, the cement is Portland cement.
Further preferably, the preparation method of the carbonized glass fiber reinforced plastic comprises the steps of crushing waste glass fiber reinforced plastic, calcining at 400-600 ℃ for 3-8 hours, and grinding to obtain the carbonized glass fiber reinforced plastic.
Further preferably, the grain size of the carbonized glass fiber reinforced plastic and the quartz sand is 0.2cm to 0.6cm.
Further preferably, the grain size of the steel slag and slag micropowder is 0.5mm-1mm.
The second aspect of the invention provides a preparation method of the asphalt concrete with high stability, which comprises the following steps:
step one, weighing sulfur/SBS/terpene resin modified asphalt and dicyclopentadiene modified asphalt according to a designed proportion to obtain a composite modified asphalt material;
weighing coarse aggregate, fine aggregate, binder, cement and water according to a designed proportion, and uniformly mixing to obtain a semi-solid mixture;
and thirdly, heating the composite modified asphalt material to 60-90 ℃, adding the semi-solid mixture into the composite modified asphalt material for 3-4 times, and uniformly mixing to obtain the pavement material containing the composite modified asphalt.
The invention provides a pavement material containing the composite modified asphalt or application of the pavement material containing the composite modified asphalt prepared by the preparation method of the pavement material containing the composite modified asphalt in highway pavement.
In summary, the invention provides a pavement material containing composite modified asphalt, which is prepared by taking sulfur/SBS/terpene resin modified asphalt and dicyclopentadiene modified asphalt as main materials and combining coarse aggregate, fine aggregate, a binder, cement, water and other auxiliary materials. The pavement material obtained by the invention has excellent storage stability and high dynamic stability, and long service life, and the test proves that the dynamic stability of the pavement material can reach 7246 times/mm, and the fatigue life can reach 14518 times. The invention effectively solves the technical problems of low dynamic stability and short service life of the asphalt concrete pavement caused by the poor storage stability and easy segregation and difficult construction of the modified asphalt in the prior art, and provides more possibility for road construction.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The embodiment provides sulfur/SBS/terpene resin modified asphalt, and the specific preparation method comprises the following steps:
s1, heating 1000g of matrix asphalt to 200 ℃, and preserving heat for 3 hours to obtain molten asphalt;
s2, uniformly mixing 50g of SBS with the molten asphalt, mechanically stirring at a rotation speed of 5500rpm, adding 3g of sulfur and 5g of terpene resin at 180 ℃, uniformly mixing, mechanically stirring at a rotation speed of 4000rpm for 60min, and standing for 1.5h after stirring to obtain the sulfur/SBS/terpene resin modified asphalt.
Example 2
The embodiment provides sulfur/SBS/terpene resin modified asphalt, and the specific preparation method comprises the following steps:
s1, heating 1000g of matrix asphalt to 150 ℃, and preserving heat for 4 hours to obtain molten asphalt;
s2, uniformly mixing 25g of SBS with the molten asphalt, mechanically stirring at a rotating speed of 4500rpm, adding 2.5g of sulfur and 5g of terpene resin at 200 ℃, uniformly mixing, mechanically stirring at a rotating speed of 5000rpm for 40min, and standing for 0.5h after stirring is completed, thus obtaining the sulfur/SBS/terpene resin modified asphalt.
Example 3
The embodiment provides dicyclopentadiene modified asphalt, and the specific preparation method comprises the following steps:
s1, dissolving 1.5g of dicyclopentadiene in 100mL of ethanol solution to obtain the ethanol solution of dicyclopentadiene;
s2, uniformly mixing the 30mL of ethanol solution of dicyclopentadiene with 1000g of matrix asphalt, adding 1g of palladium chloride, and curing for 8 hours at 70 ℃ to obtain the dicyclopentadiene modified asphalt.
Example 4
The embodiment provides dicyclopentadiene modified asphalt, and the specific preparation method comprises the following steps:
s1, dissolving 5.3g of dicyclopentadiene in 100mL of ethanol solution to obtain the ethanol solution of dicyclopentadiene;
s2, uniformly mixing the 20mL of ethanol solution of dicyclopentadiene with 1000g of matrix asphalt, adding 3g of palladium acetate, and curing for 4.5 hours at 90 ℃ to obtain the dicyclopentadiene modified asphalt.
Example 5
The embodiment provides a pavement material containing composite modified asphalt, which adopts sulfur/SBS/terpene resin modified asphalt obtained in the embodiment 1 and dicyclopentadiene modified asphalt obtained in the embodiment 3, and specifically comprises the following contents:
the pavement material containing the composite modified asphalt comprises the following components in parts by weight: 35 parts of sulfur/SBS/terpene resin modified asphalt, 35 parts of dicyclopentadiene modified asphalt, 25 parts of coarse aggregate, 20 parts of fine aggregate, 8 parts of phenolic resin, 8 parts of silicate cement and 15 parts of water;
wherein the coarse aggregate is carbonized glass fiber reinforced plastic and quartz sand with the mass ratio of 1.5:8, the grain sizes of the carbonized glass fiber reinforced plastic and the quartz sand are 0.2cm-0.6cm, and the preparation method of the carbonized glass fiber reinforced plastic comprises the following steps: crushing the waste glass fiber reinforced plastic, calcining at 500 ℃ for 5 hours, and grinding to obtain the glass fiber reinforced plastic;
the fine aggregate is steel slag and slag micropowder with the mass ratio of 1:1, and the grain size of the steel slag and slag micropowder is 0.5mm-1mm;
the preparation method of the pavement material containing the composite modified asphalt comprises the following steps:
step one, weighing sulfur/SBS/terpene resin modified asphalt and dicyclopentadiene modified asphalt according to a designed proportion to obtain a composite modified asphalt material;
weighing coarse aggregate, fine aggregate, binder, cement and water according to a designed proportion, and uniformly mixing to obtain a semi-solid mixture;
and thirdly, heating the composite modified asphalt material to 90 ℃, adding the semi-solid mixture into the composite modified asphalt material for 4 times, and uniformly mixing to obtain the pavement material containing the composite modified asphalt.
Example 6
The embodiment provides a pavement material containing composite modified asphalt, which adopts sulfur/SBS/terpene resin modified asphalt obtained in the embodiment 2 and dicyclopentadiene modified asphalt obtained in the embodiment 4, and specifically comprises the following contents:
the pavement material containing the composite modified asphalt comprises the following components in parts by weight: 40 parts of sulfur/SBS/terpene resin modified asphalt, 30 parts of dicyclopentadiene modified asphalt, 30 parts of coarse aggregate, 25 parts of fine aggregate, 5 parts of organic silicon resin, 10 parts of silicate cement and 20 parts of water;
wherein the coarse aggregate is carbonized glass fiber reinforced plastic and quartz sand with the mass ratio of 2:9, the grain diameters of the carbonized glass fiber reinforced plastic and the quartz sand are 0.2cm-0.6cm, and the preparation method of the carbonized glass fiber reinforced plastic comprises the following steps: crushing the waste glass fiber reinforced plastic, calcining at 550 ℃ for 4 hours, and grinding to obtain the glass fiber reinforced plastic;
the fine aggregate is steel slag and slag micropowder with the mass ratio of 1:2; the grain sizes of the steel slag and the slag micropowder are 0.5mm-1mm;
the preparation method of the pavement material containing the composite modified asphalt comprises the following steps:
step one, weighing sulfur/SBS/terpene resin modified asphalt and dicyclopentadiene modified asphalt according to a designed proportion to obtain a composite modified asphalt material;
weighing coarse aggregate, fine aggregate, binder, cement and water according to a designed proportion, and uniformly mixing to obtain a semi-solid mixture;
and thirdly, heating the composite modified asphalt material to 75 ℃, adding the semi-solid mixture into the composite modified asphalt material for 4 times, and uniformly mixing to obtain the pavement material containing the composite modified asphalt.
Example 7
The present example provides a pavement material containing composite modified asphalt, which adopts the sulfur/SBS/terpene resin modified asphalt obtained in example 1 and dicyclopentadiene modified asphalt obtained in example 4, and specifically comprises the following contents:
the pavement material containing the composite modified asphalt comprises the following components in parts by weight: 38 parts of sulfur/SBS/terpene resin modified asphalt, 32 parts of dicyclopentadiene modified asphalt, 26 parts of coarse aggregate, 23 parts of fine aggregate, 5 parts of organic silicon resin, 8 parts of silicate cement and 20 parts of water;
wherein the coarse aggregate is carbonized glass fiber reinforced plastic and quartz sand with the mass ratio of 1.5:10, the grain sizes of the carbonized glass fiber reinforced plastic and the quartz sand are 0.2cm-0.6cm, and the preparation method of the carbonized glass fiber reinforced plastic comprises the following steps: crushing the waste glass fiber reinforced plastic, calcining at 600 ℃ for 3 hours, and grinding to obtain the glass fiber reinforced plastic;
the fine aggregate is steel slag and slag micropowder with the mass ratio of 1:1.5; the grain sizes of the steel slag and the slag micropowder are 0.5mm-1mm;
the preparation method of the pavement material containing the composite modified asphalt comprises the following steps:
step one, weighing sulfur/SBS/terpene resin modified asphalt and dicyclopentadiene modified asphalt according to a designed proportion to obtain a composite modified asphalt material;
weighing coarse aggregate, fine aggregate, binder, cement and water according to a designed proportion, and uniformly mixing to obtain a semi-solid mixture;
and thirdly, heating the composite modified asphalt material to 95 ℃, adding the semi-solid mixture into the composite modified asphalt material for 4 times, and uniformly mixing to obtain the pavement material containing the composite modified asphalt.
Comparative example 1
This comparative example provides an asphalt concrete, which differs from example 5 in that: the asphalt is sulfur/SBS modified asphalt and dicyclopentadiene modified asphalt, and other components and preparation methods are unchanged and are not described in detail herein.
The preparation method of the sulfur/SBS modified asphalt comprises the following steps:
s1, heating 1000g of matrix asphalt to 200 ℃, and preserving heat for 3 hours to obtain molten asphalt;
s2, uniformly mixing 50g of SBS with the molten asphalt, mechanically stirring at a rotation speed of 5000rpm, adding 4g of sulfur at 190 ℃, uniformly mixing, mechanically stirring at a rotation speed of 4500rpm for 40min, and standing for 1.5h after stirring is completed to obtain the sulfur/SBS modified asphalt.
Comparative example 2
This comparative example provides an asphalt concrete, which differs from example 5 in that: the asphalt is sulfur/terpene resin modified asphalt and dicyclopentadiene modified asphalt, and other components and preparation methods are unchanged and are not described in detail herein.
The preparation method of the sulfur/terpene resin modified asphalt comprises the following steps:
s1, heating 1000g of matrix asphalt to 200 ℃, and preserving heat for 3 hours to obtain molten asphalt;
s2, mechanically stirring the molten asphalt at a rotation speed of 5000rpm, adding 4g of sulfur and 5g of terpene resin at 190 ℃, uniformly mixing, mechanically stirring at a rotation speed of 4500rpm for 40min, and standing for 1.5h after stirring is completed to obtain the sulfur/terpene resin modified asphalt.
Comparative example 3
This comparative example provides an asphalt concrete, which differs from example 5 in that: the asphalt is sulfur/SBS/terpene resin modified asphalt, and other components and preparation methods are unchanged and are not described in detail herein.
Comparative example 4
This comparative example provides an asphalt concrete, which differs from example 5 in that: the asphalt is dicyclopentadiene modified asphalt, and other components and preparation methods are unchanged and are not described in detail herein.
Comparative example 5
This comparative example provides an asphalt concrete, which differs from example 5 in that: the asphalt is sulfur/SBS/terpene resin modified asphalt and polyisoprene modified asphalt, and other components and preparation methods are unchanged and are not repeated here.
The preparation method of the polyisoprene modified asphalt comprises the following steps:
s1, dissolving 5.3g of polyisoprene into 100mL of ethanol solution to obtain the ethanol solution of polyisoprene;
s2, uniformly mixing the 20mL of ethanol solution of polyisoprene with 1000g of matrix asphalt, adding 5g of palladium acetate, and curing for 6 hours at 80 ℃ to obtain the polyisoprene modified asphalt.
In order to further embody the technical effects of the present invention, the pavement materials obtained in examples 5 to 7 and comparative examples 1 to 5 were tested as follows according to the test procedure for asphalt and asphalt mixtures for highway engineering (JTG E20-2011):
(1) The penetration, ductility, softening point and polymer modification segregation tests of the composite modified asphalt for the pavement materials obtained in examples 5 to 7 and comparative examples 1 to 5 are shown in Table 1.
(2) The rutting test (dynamic stability) and four-point bending fatigue life test of the pavement materials obtained in examples 5 to 7 and comparative examples 1 to 5 are shown in Table 2.
Table 1 results of Performance test of composite modified asphalt for pavement materials
Table 2 results of performance testing of various pavement materials
As can be seen from tables 1 and 2, the pavement materials provided in examples 5 to 7 of the present invention have excellent rut resistance and fatigue life, have a dynamic stability of up to 7246 times/mm and a fatigue life of up to 14518 times, and are stable in storage performance, free from skinning and precipitation, and are significantly superior to the pavement materials provided in comparative examples. The pavement material containing the composite modified asphalt provided by the invention also proves that the problems of low dynamic stability and short service life of the asphalt concrete pavement caused by the fact that the modified asphalt used in the asphalt concrete in the prior art is poor in storage stability and difficult to isolate and construct are solved.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, or alternatives falling within the spirit and principles of the invention.
Claims (8)
1. A pavement material containing composite modified asphalt is characterized in that: comprises the following components in parts by weight: 30-40 parts of sulfur/SBS/terpene resin modified asphalt, 30-40 parts of dicyclopentadiene modified asphalt, 20-30 parts of coarse aggregate, 15-25 parts of fine aggregate, 5-10 parts of binder, 5-10 parts of cement and 10-20 parts of water; the preparation method of the sulfur/SBS/terpene resin modified asphalt comprises the following steps:
s1, heating matrix asphalt to 150-250 ℃, and preserving heat for 2-4 hours to obtain molten asphalt;
s2, uniformly mixing SBS and the molten asphalt, mechanically stirring at a rotating speed of 4500rpm-5500rpm, adding sulfur and terpene resin at 180-200 ℃, uniformly mixing to obtain a mixed asphalt system, and developing to obtain the sulfur/SBS/terpene resin modified asphalt;
in S2, the specific operation of the development is: mechanically stirring the mixed asphalt system at a rotating speed of 4000rpm-5000rpm for 30min-60min, and standing for 0.5h-2h after stirring is completed;
the preparation method of the dicyclopentadiene modified asphalt comprises the following steps: mixing the dicyclopentadiene alcohol solution with matrix asphalt uniformly, adding palladium catalyst, and curing for 4-8 h at 70-90 ℃ to obtain the dicyclopentadiene modified asphalt.
2. The pavement material comprising composite modified asphalt according to claim 1, wherein: in S2, the mass ratio of the SBS to the molten asphalt is 1-2:20-40; and/or
S2, mechanically stirring for 1-2 hours; and/or
In S2, the mass ratio of the sulfur to the SBS to the terpene resin is 0.5-1:10:1.
3. The pavement material comprising composite modified asphalt according to claim 1, wherein: the mass ratio of the dicyclopentadiene alcohol solution to the matrix asphalt is 1-5:100-150, wherein the concentration of dicyclopentadiene in the dicyclopentadiene alcohol solution is 0.1-0.5 mol/L; and/or
The alcohol solution of dicyclopentadiene is ethanol solution of dicyclopentadiene or methanol solution of dicyclopentadiene; and/or
The palladium catalyst is any one of palladium acetate, palladium chloride or tetraphenylphosphine palladium; and/or
The mass ratio of the palladium catalyst to the matrix asphalt is 0.1-0.3:50-100.
4. The pavement material comprising composite modified asphalt according to claim 1, wherein: the coarse aggregate is carbonized glass fiber reinforced plastic and quartz sand with the mass ratio of 1-2:5-10; and/or
The fine aggregate is steel slag and slag micropowder with the mass ratio of 1:1-2; and/or
The binder is any one or more of organic silicon resin, phenolic resin or polyester resin.
5. The pavement material comprising composite modified asphalt according to claim 4, wherein: the preparation method of the carbonized glass fiber reinforced plastic comprises the steps of crushing waste glass fiber reinforced plastic, calcining at 400-600 ℃ for 3-8 hours, and grinding to obtain the carbonized glass fiber reinforced plastic.
6. The pavement material comprising composite modified asphalt according to claim 4, wherein: the grain diameters of the carbonized glass fiber reinforced plastic and the quartz sand are 0.2cm-0.6cm; and/or
The grain size of the steel slag and slag micropowder is 0.5mm-1mm.
7. A method for producing a pavement material containing a composite modified asphalt as defined in any one of claims 1 to 6, characterized in that: the method comprises the following steps:
step one, weighing sulfur/SBS/terpene resin modified asphalt and dicyclopentadiene modified asphalt according to a designed proportion to obtain a composite modified asphalt material;
weighing coarse aggregate, fine aggregate, binder, cement and water according to a designed proportion, and uniformly mixing to obtain a semi-solid mixture;
and thirdly, heating the composite modified asphalt material to 60-100 ℃, adding the semi-solid mixture into the composite modified asphalt material for 3-4 times, and uniformly mixing to obtain the pavement material containing the composite modified asphalt.
8. Use of the composite modified asphalt-containing pavement material according to any one of claims 1 to 6 or the composite modified asphalt-containing pavement material produced by the production method of the composite modified asphalt-containing pavement material according to claim 7 in a road pavement.
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| JP2005041210A (en) * | 2003-07-04 | 2005-02-17 | Nitto Denko Corp | Reinforcement steel for steel plate |
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