CN109306192B - Hard asphalt cement and preparation method and application thereof - Google Patents

Hard asphalt cement and preparation method and application thereof Download PDF

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CN109306192B
CN109306192B CN201710630471.4A CN201710630471A CN109306192B CN 109306192 B CN109306192 B CN 109306192B CN 201710630471 A CN201710630471 A CN 201710630471A CN 109306192 B CN109306192 B CN 109306192B
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asphalt
hard
mixture
aggregate
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CN109306192A (en
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彭煜
蔺习雄
熊良铨
刘雁
杨克红
张艳莉
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Petrochina Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
    • C04B26/02—Macromolecular compounds
    • C04B26/26—Bituminous materials, e.g. tar, pitch
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L91/00—Compositions of oils, fats or waxes; Compositions of derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L95/00—Compositions of bituminous materials, e.g. asphalt, 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend

Abstract

The invention provides a hard asphalt cement and a preparation method and application thereof. The hard asphalt cement comprises the following components in parts by weight: 25-60 parts of a first petroleum component, 15-50 parts of a second petroleum component, 15-35 parts of a third petroleum component and 0.05-0.1 part of a catalyst; wherein: the first petroleum component is deoiled asphalt, the second petroleum component is at least one of minus four-line distillate oil, vacuum residue oil and road asphalt, the third petroleum component is at least one of furfural extract oil and catalytic cracking slurry oil, and the catalyst is at least one of phosphoric acid and polyphosphoric acid; the wax content of the hard asphalt cement is less than or equal to 2.0 percent; the content of asphaltene is less than or equal to 15 percent. The hard asphalt cement can effectively solve the track diseases of the asphalt pavement caused by heavy traffic, high-temperature climate and the like, improves the low-temperature crack resistance and fatigue resistance of the asphalt mixture, and prolongs the service life of the pavement.

Description

Hard asphalt cement and preparation method and application thereof
Technical Field
The invention belongs to the technical field of road asphalt, and particularly relates to a hard asphalt cement and a preparation method and application thereof.
Background
Due to rapid development of economy and unbalanced distribution of energy, mineral production places and demand places, the transportation industry of China is rapidly developed; meanwhile, the phenomena of road traffic overload, heavy load and overload are increasingly common, and in addition, the occurrence frequency of the multi-polar continuous high-temperature climate is increased, so that the track diseases of the asphalt pavement are more serious, and the comfort and the safety of driving are directly influenced. Aiming at the problems, the anti-rutting performance of the asphalt pavement can be enhanced by adopting a series of measures such as a hard asphalt cementing material, improvement of aggregate quality, improvement of asphalt mixture gradation, optimization of pavement structural design and the like.
For example, chinese patent publication No. CN 103833267 a discloses an easy-to-construct thermal regeneration asphalt mixture, a preparation method and an application thereof, the mixture includes No. 50 road petroleum asphalt, new mineral aggregate and asphalt pavement recycling material, and the ratio of the mass portion of the petroleum asphalt formed by the No. 50 road petroleum asphalt and the old petroleum asphalt to the mass portion of the mineral aggregate formed by the new mineral aggregate and the old mineral aggregate is 100: (5.5-6.5); the new and old mineral aggregates account for 50-70% and 30-50% of the mineral aggregates respectively. The durable high-strength hot recycled asphalt mixture has high complex modulus and dynamic stability, and good high-temperature anti-rutting performance, but the low-temperature anti-cracking performance is low, so that the durable high-strength hot recycled asphalt mixture is difficult to popularize and apply in northern cold regions.
Chinese patent publication No. CN 105482475 a discloses a composite modified hard asphalt and a preparation method thereof, wherein the composite modified hard asphalt comprises the following components in parts by weight: matrix asphalt: 100 parts of a compatilizer: 3-8 parts of rubber powder: 10-20 parts of a polymer: 1-3 parts of an auxiliary agent: 0.1-0.4 parts of hard asphalt: 10-30 parts. The composite modified hard asphalt has the characteristics of good high-low temperature performance, storage stability, excellent ageing resistance, good construction workability and the like, but has high penetration degree and low dynamic viscosity, and when the composite modified hard asphalt is applied to a durable high-modulus asphalt mixture, the composite modulus cannot meet the corresponding requirements of technical specifications of a high-modulus asphalt mixture in France.
Chinese patent with publication number CN 101608026A discloses a hard asphalt modifier and a modified shallow modified asphalt using the same, which is obtained by subjecting 94-99.4% of petroleum residue, 0.1-1% of ferric trichloride or phosphorus pentoxide and 0.5-5% of petroleum naphthenic acid to asphalt oxidation reaction under certain conditions, and the raw materials contain high asphaltene, so that the low-temperature performance and fatigue performance of the hard asphalt cement obtained after the oxidation reaction are poor, and the requirements of technical specifications of high-modulus asphalt mixtures in France on the fatigue performance are difficult to meet.
In summary, the following disadvantages generally exist in the existing hard asphalt cement and asphalt mixture: 1) the common hard asphalt cement has large low-temperature brittleness and insufficient bending and tensile resistance, is easy to generate temperature shrinkage cracks when being applied to common asphalt mixtures, and is difficult to popularize and apply in northern cold and severe cold areas; 2) the common hard asphalt cement has less soft components, and the fatigue resistance when being applied to high-modulus asphalt mixture can be greatly reduced, so that the durability of the common hard asphalt cement is obviously reduced.
Therefore, how to improve the adaptability of the hard asphalt cement in northern cold regions and improve the fatigue resistance and durability of the hard asphalt cement while ensuring that the hard asphalt cement has excellent anti-rutting performance under high-temperature and heavy-load conditions is a technical problem which is difficult to solve for a long time by technical personnel in the field.
Disclosure of Invention
The invention provides a hard asphalt cement and a preparation method and application thereof, the hard asphalt cement overcomes the defects of large low-temperature brittleness, poor bending and pulling resistance, insufficient fatigue resistance and durability and the like of the existing hard asphalt, improves the low-temperature crack resistance and fatigue resistance of an asphalt mixture while solving the rutting diseases of an asphalt pavement caused by heavy traffic and high-temperature climate, and prolongs the service life of the pavement.
The invention provides a hard asphalt cement which comprises the following components in parts by weight:
25-60 parts of a first petroleum component, 15-50 parts of a second petroleum component, 15-35 parts of a third petroleum component and 0.05-0.1 part of a catalyst; wherein:
the first petroleum component is deoiled asphalt, the second petroleum component is at least one of minus four-line distillate oil, vacuum residue oil and road asphalt, the third petroleum component is at least one of furfural extract oil and catalytic cracking slurry oil, and the catalyst is at least one of phosphoric acid and polyphosphoric acid;
the wax content of the hard asphalt cement is less than or equal to 2.0 percent; the content of asphaltene is less than or equal to 15 percent.
Furthermore, the wax content of the hard asphalt cement is less than or equal to 1.8 percent, and the asphaltene content is less than or equal to 5 percent.
Furthermore, the content of the asphaltene in the hard asphalt cementing material is less than or equal to 2.0 percent. In the present invention, unless otherwise specified, the contents (%) of each substance are mass (wt%).
In the present invention, the deoiled asphalt is a raffinate obtained by extracting a heavy oil such as vacuum residue or the like as a raw material with a hydrocarbon such as propane or butane as a solvent. Specifically, the deoiled asphalt may be at least one of propane deoiled asphalt, butane deoiled asphalt, and propane and butane mixed solvent deoiled asphalt; wherein, the mass ratio of propane to butane in the mixed solvent of propane and butane can be 1: 1. particularly, the needle penetration of the deoiled asphalt at 25 ℃ is 5-45 dmm; the asphaltene content is less than or equal to 5.0 percent; furthermore, the content of asphaltene is less than or equal to 2.0 percent.
In the invention, the distillation range of the minus four-line distillate oil is 400-520 ℃; the vacuum residue is residue oil extracted from the bottom of a vacuum tower of an oil refinery, and specifically, the softening point of the vacuum residue oil is 25-40 ℃; the wax content is less than or equal to 2.0 percent; the road asphalt is road asphalt meeting the requirements of various grades in technical Specification for construction of road asphalt pavement (JTG F40-2004), such as No. 30 road asphalt, No. 50 road asphalt, No. 70 road asphalt, No. 90 road asphalt, No. 110 road asphalt, No. 130 road asphalt and the like.
In the invention, the furfural extract oil is a product extracted by taking furfural as a solvent, the catalytic cracking slurry oil is residual oil formed by a catalytic cracking process of an oil refinery, and specifically, the aromatic hydrocarbon content of the furfural extract oil and the catalytic cracking slurry oil is 50-80%; kinematic viscosity at 100 ℃ of 20mm2/s～70mm2/s。
Particularly, the first petroleum, the second petroleum component and the third petroleum component are mixed in a hot melting state to form a mixture, and the penetration degree at 25 ℃ of the mixture is 50-150 dmm; the wax content is less than or equal to 2.0 percent; the asphaltene content is less than or equal to 5.0 percent; further, the content of wax is less than or equal to 1.8 percent; the content of asphaltene is less than or equal to 2.0 percent.
In the present invention, P of the polyphosphoric acid2O5The content is more than or equal to 80 percent.
The penetration of the hard asphalt cement is 10-25 dmm at 25 ℃; the dynamic viscosity is more than or equal to 10000Pa.s at the temperature of 60 ℃; the high-temperature performance grade is PG 94-PG 100; the low-temperature performance grade is PG-22 to PG-28; the creep compliance of the 76 ℃ multi-stress creep test is less than or equal to 0.5, the change rate of the creep compliance is less than or equal to 75 percent, and further the creep compliance is less than or equal to 0.1 and the change rate of the creep compliance is less than or equal to 5 percent.
The invention also provides a preparation method of the hard asphalt cement, which comprises the following steps:
1) uniformly mixing 25-60 parts of a first petroleum component, 15-50 parts of a second petroleum component and 15-35 parts of a third petroleum component in a hot melting state to obtain a mixture;
2) and adding 0.05-0.1 part of catalyst into the mixture, slowly heating under the stirring condition, and introducing air for reaction to obtain the hard asphalt cement.
Further, step 2) comprises:
adding 0.05-0.1 part of catalyst into the mixture, slowly heating to 190-220 ℃ under the stirring condition, introducing air at the flow rate of 2.5-4.0L/min.kg, and reacting for 6-15 hours to obtain the hard asphalt cement.
The invention also provides an asphalt mixture, which comprises mineral aggregate and the hard asphalt cement, wherein: the mineral aggregate comprises 95-97 parts by weight of aggregate and 3-5 parts by weight of mineral powder, and the mass ratio of the mineral aggregate to the hard asphalt cement in the asphalt mixture is 100: (5.5-6.5).
In the invention, the aggregate is basalt, limestone or diabase aggregate (including coarse aggregate and fine aggregate); the mineral powder is limestone powder. Wherein, the physical and chemical properties of the coarse aggregate, the fine aggregate and the stone powder should meet the corresponding technical requirements of JTG F40-2004 technical Specification for construction of highway asphalt pavements.
Further, the gradation of the mineral aggregate is as follows: the sieve plate with the thickness of the sieve plate is characterized by comprising the following components, by weight, 100% of 16mm sieve holes, 90-100% of 13.2mm sieve holes, 55-75% of 9.5mm sieve holes, 45-55% of 4.75mm sieve holes, 28-36% of 2.36mm sieve holes, 18-28% of 1.18mm sieve holes, 12-20% of 0.6mm sieve holes, 9-15% of 0.3mm sieve holes, 8.0-10% of 0.15mm sieve holes and 6.0-7.5% of 0.075mm sieve holes.
The invention also provides a preparation method of the asphalt mixture, which comprises the following steps:
a) respectively preheating aggregate, mineral powder and hard asphalt cement;
b) and stirring and mixing the preheated aggregate and the hard asphalt cement, and stirring and mixing the preheated aggregate and the preheated mineral powder to prepare the asphalt mixture.
Further, step a) comprises:
respectively preheating the aggregate and the mineral powder to 185-195 ℃, preheating the hard asphalt cement to 175-185 ℃, and preserving heat for later use.
Further, step b) comprises:
and stirring and mixing the preheated aggregate and the hard asphalt cement for 50-70 seconds under the conditions that the rotation speed of the stirring blades is 72-78 r/min and the revolution speed is 42-48 r/min, and stirring and mixing the preheated aggregate and the hard asphalt cement for 110-130 seconds under the conditions that the rotation speed of the stirring blades is 72-78 r/min and the revolution speed is 42-48 r/min to prepare the asphalt mixture.
The asphalt mixture of the invention:
according to the EN 12697-31 rotary compaction test method, after the asphalt mixture is subjected to rotary compaction forming, the porosity VV of a test piece is 1.0-3.0%; wherein, the test conditions are as follows: the internal rotation angle is 0.82 degrees (the external rotation angle is 1 degree), the vertical pressure is 600KPa, and the rotating speed is 100 times under the condition of 30 r/min;
according to an EN 12697-26 complex modulus test method, the composite modulus of the asphalt mixture is more than or equal to 17000MP at the test temperature of 15 ℃; the composite modulus of the asphalt mixture is more than or equal to 15000MPa at the test temperature of 20 ℃;
according to the EN 12697-22 rutting test method, the rutting deformation rate of the asphalt mixture is less than or equal to 5.0% at the test temperature of 60 ℃;
according to the T0718 + 2011 rut test method, the dynamic stability of the asphalt mixture is more than or equal to 5500 times/mm;
according to the EN 12697-24 fatigue test method, the fatigue life of the French two-point trapezoidal beam fatigue test is more than or equal to 1300000 times under the conditions that the test temperature of the asphalt mixture is 10 ℃, the frequency is 25Hz and the microstrain is 130 mu epsilon;
according to the T0715-;
according to the freeze-thaw splitting test method of the T0729-2000-plus-material asphalt mixture, after the asphalt mixture is subjected to one freeze-thaw cycle, the freeze-thaw splitting strength ratio TSR of the freeze-thaw splitting test is more than or equal to 85%.
The implementation of the invention has at least the following advantages:
1. compared with the common hard asphalt cement, the hard asphalt cement has the dynamic viscosity of more than or equal to 10000Pa.s at 60 ℃, the high-temperature performance grade of PG 94-PG 100 and the low-temperature performance grade of PG-22-PG-28, and has more excellent high-temperature and low-temperature performances.
2. Compared with the common hard asphalt cement, when the hard asphalt cement is applied to a durable high-modulus asphalt mixture, the maximum failure strain of a low-temperature trabecula bending test of the asphalt mixture is more than or equal to 2800 mu epsilon, and the fatigue life of a French two-point trapezoidal beam fatigue test is more than or equal to 1300000 times, so that the hard asphalt cement has better low-temperature crack resistance and durability, and the service life of a pavement is prolonged.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The raw materials used in the examples were as follows:
each deoiled asphalt: the penetration degree of each deoiled asphalt at 25 ℃ is 5-45 dmm, and the content of asphaltene is less than or equal to 5.0 percent; from medium petroleum crataoyi petrochemical company, llc;
reducing four-line distillate oil: the distillation range is 400-520 ℃; from medium petroleum crataoyi petrochemical company, llc;
vacuum residuum: the softening point of the vacuum residue is 25-40 ℃, and the wax content is less than or equal to 2.0 percent; from medium petroleum crataoyi petrochemical company, llc;
asphalt for each road: meets the requirements of various grades in technical Specification for constructing asphalt road surfaces for highways (JTG F40-2004); from medium petroleum crataoyi petrochemical company, llc;
extracting oil from furfural: the aromatic hydrocarbon content of the furfural extract oil is 50-80%, and the kinematic viscosity at 100 ℃ is 20mm2/s～70mm2S; from medium petroleum crataoyi petrochemical company, llc;
catalytic cracking slurry oil: the aromatic content of the catalytic cracking slurry oil is 50-80%, and the kinematic viscosity at 100 ℃ is 20mm2/s～70mm2S; from medium petroleum crataoyi petrochemical company, llc;
polyphosphoric acid: it P is2O5The content is more than or equal to 80 percent.
Example 1
1. Hard asphalt cement and preparation thereof
The hard asphalt cement of the embodiment comprises the following components in parts by weight: 60 parts of propane deoiled asphalt, 24.95 parts of No. 90 road asphalt, 15 parts of furfural extract oil and 0.05 part of phosphoric acid.
The preparation method of the hard asphalt cement comprises the following steps:
adding 60 parts of propane deoiled asphalt, 24.95 parts of No. 90 road asphalt and 15 parts of furfural extract oil into a reaction kettle, and uniformly mixing under a hot melting state to obtain a mixture; the test shows that the penetration degree of the mixture at 25 ℃ is 50dmm, the wax content is 1.8 percent, and the asphaltene content is 0.4 percent.
And adding 0.05 part of phosphoric acid into the mixture, slowly heating to 200 ℃ under the stirring condition, introducing air with the flow of 2.5L/min.kg into the reaction kettle, and reacting for 15 hours to obtain the hard asphalt cement.
Through detection, the penetration of the hard asphalt cement at 25 ℃ is 10dmm, the viscosity at 60 ℃ is 16042Pa.s, the high-temperature performance grade is PG100, the low-temperature performance grade is PG-28, the wax content is 1.7%, the asphaltene content is 1.2%, the creep compliance of a multi-stress creep test at 76 ℃ and 3.2KPa is 0.044, and the creep compliance change rate of 0.1 KPa-3.2 KPa is 2.48%.
Wherein, the penetration at 25 ℃ is detected by a T0604-2011 method; detecting the viscosity at 60 ℃ by adopting a T0625-2011 method; detecting the high-temperature performance grade by adopting an AASHTO T315-10 method; detecting the low-temperature performance grade by adopting an AASHTOT313-10 method; detecting the wax content by a T0615-2011 method; detecting the content of asphaltene by adopting a NB/SH/T0509-2010 method; the AASHTO TP70-10 method is adopted to carry out the multi-stress creep test, and the test conditions are as follows: the test temperature is 76 ℃, and the acting stress is 0.1KPa and 3.2KPa respectively.
2. Asphalt mixture and preparation method thereof
The asphalt mixture of this embodiment includes mineral aggregate and the above-mentioned hard asphalt cement, wherein: the mineral aggregate consists of 97 parts of basalt aggregate and 3 parts of limestone mineral powder, and the mass ratio of the mineral aggregate to the hard asphalt cement in the asphalt mixture is 100: 5.8.
wherein, the mineral aggregate gradation corresponds to the mesh sizes of 16mm, 13.2mm, 9.5mm, 4.75mm, 2.36mm, 1.18mm, 0.6mm, 0.3mm, 0.15mm, 0.075mm, and the weight percentage passage rates are as follows in sequence: 100%, 95%, 65%, 50%, 32%, 25%, 16%, 12%, 9%, 6.5%; the physicochemical properties of the coarse aggregate, fine aggregate and stone dust are shown in table 1 below.
TABLE 1 physicochemical Properties of aggregate and mineral powders
Figure GDA0001432024930000071
The preparation method of the asphalt mixture comprises the following steps:
respectively preheating 97 parts of basalt aggregate and 3 parts of limestone powder to 195 ℃, and preheating 5.8 parts of hard asphalt cement to 185 ℃; and preserving the heat for later use.
Pouring the basalt aggregate with the temperature of 195 ℃ and the hard asphalt cement with the temperature of 185 ℃ into a mixing pot preheated to 185 ℃, starting the mixing pot, and stirring for 60s under the conditions that the rotation speed of the stirring blades is 72r/min and the revolution speed is 48 r/min; adding limestone powder of 195 ℃ into the mixing pot, and continuously mixing for 120s under the conditions that the rotation speed of the mixing blades is 72r/min and the revolution speed is 48r/min to obtain the asphalt mixture.
The performance of the asphalt mixture is detected by adopting the following method:
forming a test piece according to the EN 12697-31 rotary compaction test method, wherein the test conditions are as follows: the internal rotation angle is 0.82 degrees (the external rotation angle is 1 degree), the vertical pressure is 600KPa, the rotating speed is 30r/min, the rotating compaction times are 100 times, and the following French standard is adopted to calculate the void ratio VV;
Figure GDA0001432024930000081
wherein: h ismin: compacting the minimum height of the test piece, wherein the corresponding void ratio is 0 and the unit is mm;
hi: the height of the test piece in mm after rotating i times.
Carrying out a water immersion Marshall test according to a T0709-2011 test method, and detecting the water damage resistance of the asphalt mixture;
performing a freeze-thaw splitting test on the asphalt mixture according to a T0729-2000 test method, and detecting the freeze-thaw splitting strength ratio TSR after one freeze-thaw cycle;
detecting the rut deformation rate at 60 ℃ according to an EN 12697-22 rut test method;
detecting the dynamic stability according to a T0718 + 2011 rut test method;
detecting the maximum failure strain of a trabecular bending test to be more than or equal to 2800 mu epsilon according to a T0715-: the test temperature is-10 ℃, and the loading rate is 50 mm/min;
detecting the complex modulus at 15 ℃ (15 ℃ ITSM modulus) and the complex modulus at 20 ℃ (20 ℃ ITSM modulus) according to an EN 12697-26 complex modulus test method;
detecting the fatigue life of the French two-point trapezoidal beam fatigue test according to an EN 12697-24 fatigue test method, wherein the test conditions are as follows: the test temperature is 10 ℃, the frequency is 25Hz, and the microstrain is 130 mu epsilon;
the results are shown in Table 4.
Example 2
1. Hard asphalt cement and preparation thereof
The hard asphalt cement of the embodiment comprises the following components in parts by weight: 34.9 parts of butane deoiled asphalt, 50 parts of vacuum residuum, 15 parts of catalytic cracking slurry oil and 0.1 part of phosphoric acid.
The preparation method of the hard asphalt cement comprises the following steps:
adding 34.9 parts of butane deoiled asphalt, 50 parts of vacuum residue and 15 parts of catalytic cracking slurry oil into a reaction kettle, and uniformly mixing in a hot melting state to obtain a mixture; the test shows that the penetration degree of the mixture at 25 ℃ is 150dmm, the wax content is 1.8 percent, and the asphaltene content is 2.0 percent.
And adding 0.1 part of phosphoric acid into the mixture, slowly heating to 200 ℃ under the stirring condition, introducing air with the flow of 3.0L/min.kg into the reaction kettle, and reacting for 10 hours to obtain the hard asphalt cement.
The test of the method of example 1 shows that the penetration of the hard asphalt cement at 25 ℃ is 15dmm, the viscosity at 60 ℃ is 13542Pa.s, the high-temperature performance grade is PG94, the low-temperature performance grade is PG-28, the wax content is 1.6%, the asphaltene content is 1.9%, the creep compliance of the multi-stress creep test at 76 ℃ and 3.2KPa is 0.051, and the creep compliance change rate of 0.1 KPa-3.2 KPa is 2.317%.
2. Asphalt mixture and preparation method thereof
The asphalt mixture of the embodiment comprises the following components in parts by weight: 95 parts of limestone aggregate, 5 parts of limestone powder and 6.5 parts of the hard asphalt cement.
Wherein, the mineral aggregate gradation corresponds to the mesh sizes of 16mm, 13.2mm, 9.5mm, 4.75mm, 2.36mm, 1.18mm, 0.6mm, 0.3mm, 0.15mm, 0.075mm, and the weight percentage passage rates are as follows in sequence: 100%, 97%, 70%, 50%, 34%, 28%, 15%, 13%, 9.5%, 7.5%; the physicochemical properties of the coarse aggregate, fine aggregate and stone dust are shown in Table 2 below.
TABLE 2 physicochemical Properties of aggregate and mineral powders
Figure GDA0001432024930000091
The preparation method of the asphalt mixture comprises the following steps:
respectively preheating 95 parts of limestone aggregate and 5 parts of limestone powder to 185 ℃, and preheating 6.5 parts of hard asphalt cement to 175 ℃; and preserving the heat for later use.
Pouring the limestone aggregate with the temperature of 185 ℃ and the hard asphalt cement with the temperature of 175 ℃ into a stirring pot which is preheated to 175 ℃, starting the stirring pot, and stirring for 60s under the conditions that the rotation speed of a stirring blade is 78r/min and the revolution speed is 42 r/min; adding limestone powder with the temperature of 185 ℃ into the mixing pot, and continuously mixing for 120s under the conditions that the rotation speed of the mixing blades is 78r/min and the revolution speed is 42r/min to obtain the asphalt mixture.
The performance of the asphalt mixture was measured by the method of example 1, and the results are shown in table 4.
Example 3
1. Hard asphalt cement and preparation thereof
The hard asphalt cement of the embodiment comprises the following components in parts by weight: 25.0 parts of deoiled asphalt, 10.0 parts of No. 30 road asphalt, 29.95 parts of minus-four line distillate oil, 35.0 parts of catalytic cracking slurry oil and 0.05 part of phosphoric acid, wherein the mass ratio of propane to butane is 1: 1.
The preparation method of the hard asphalt cement comprises the following steps:
adding 25.0 parts of propane and butane mixed solvent deoiled asphalt, 10.0 parts of No. 30 road asphalt, 29.95 parts of minus four-line distillate oil and 35.0 parts of catalytic cracking slurry oil into a reaction kettle, and uniformly mixing under a hot melting state to obtain a mixture; through detection, the penetration degree of the mixture at 25 ℃ is 65dmm, the wax content is 1.7 percent, and the asphaltene content is 1.2 percent.
And adding 0.05 part of phosphoric acid into the mixture, slowly heating to 210 ℃ under the stirring condition, introducing 3.0L/min.kg of air into the reaction kettle, and reacting for 8 hours to obtain the hard asphalt cement.
The method of example 1 is adopted for detection, the penetration of the hard asphalt cement at 25 ℃ is 25dmm, the viscosity at 60 ℃ is 10000Pa.s, the high-temperature performance grade is PG94, the low-temperature performance grade is PG-22, the wax content is 1.7%, the asphaltene content is 1.8%, the creep compliance of a multi-stress creep test at 76 ℃ and 3.2KPa is 0.025, and the creep compliance change rate of 0.1 KPa-3.2 KPa is 1.864%.
2. Asphalt mixture and preparation method thereof
The asphalt mixture of the embodiment comprises the following components in parts by weight: 96 parts of limestone aggregate, 4 parts of limestone powder and 6.2 parts of the hard asphalt cement.
Wherein, the mineral aggregate gradation corresponds to the mesh sizes of 16mm, 13.2mm, 9.5mm, 4.75mm, 2.36mm, 1.18mm, 0.6mm, 0.3mm, 0.15mm, 0.075mm, and the weight percentage passage rates are as follows in sequence: 100%, 97%, 70%, 50%, 34%, 28%, 15%, 13%, 9.5%, 7.5%; the physicochemical properties of the coarse aggregate, fine aggregate and stone dust were the same as in example 2.
The preparation method of the asphalt mixture comprises the following steps:
respectively preheating 96 parts of limestone aggregate and 4 parts of limestone powder to 190 ℃, and preheating 6.2 parts of hard asphalt cement to 180 ℃; and preserving the heat for later use.
Pouring 190 ℃ limestone aggregate and 180 ℃ hard asphalt cement into a stirring pot preheated to 180 ℃, starting the stirring pot, and stirring for 60s under the conditions that the rotation speed of a stirring blade is 75r/min and the revolution speed is 45 r/min; and adding limestone powder of 190 ℃ into the mixing pot, and continuously mixing for 120s under the conditions that the rotation speed of the mixing blades is 75r/min and the revolution speed is 45r/min to obtain the asphalt mixture.
The performance of the asphalt mixture was measured by the method of example 1, and the results are shown in table 4.
Example 4
1. Hard asphalt cement and preparation thereof
The hard asphalt cement of the embodiment comprises the following components in parts by weight: 40.0 parts of propane deoiled asphalt, 20.0 parts of butane deoiled asphalt, 15.0 parts of minus four-line distillate oil, 24.95 parts of furfural extract oil and 0.05 part of polyphosphoric acid.
The preparation method of the hard asphalt cement comprises the following steps:
adding 40.0 parts of propane deoiled asphalt, 20.0 parts of butane deoiled asphalt, 15.0 parts of minus four-line distillate oil and 24.95 parts of furfural extract oil into a reaction kettle, and uniformly mixing under a hot melting state to obtain a mixture; the test shows that the penetration degree of the mixture at 25 ℃ is 105dmm, the wax content is 1.3 percent, and the asphaltene content is 1.2 percent.
And adding 0.05 part of polyphosphoric acid into the mixture, slowly heating to 190 ℃ under the stirring condition, introducing air with the flow of 4.0L/min.kg into the reaction kettle, and reacting for 12 hours to obtain the hard asphalt cement.
The method of example 1 is adopted for detection, the penetration of the hard asphalt cement at 25 ℃ is 20dmm, the viscosity at 60 ℃ is 22892Pa.s, the high-temperature performance grade is PG100, the low-temperature performance grade is PG-28, the wax content is 1.7%, the asphaltene content is 1.3%, the creep compliance of a multi-stress creep test at 76 ℃ and 3.2KPa is 0.034, and the creep compliance change rate of 0.1 KPa-3.2 KPa is 2.101%.
2. Asphalt mixture and preparation method thereof
The asphalt mixture of the embodiment comprises the following components in parts by weight: 97 parts of limestone aggregate, 3 parts of limestone powder and 5.5 parts of the hard asphalt cement.
Wherein, the mineral aggregate gradation corresponds to the mesh sizes of 16mm, 13.2mm, 9.5mm, 4.75mm, 2.36mm, 1.18mm, 0.6mm, 0.3mm, 0.15mm, 0.075mm, and the weight percentage passage rates are as follows in sequence: 100%, 97%, 70%, 50%, 34%, 28%, 15%, 13%, 9.5%, 6.0%; the physicochemical properties of the coarse aggregate, fine aggregate and stone dust were the same as in example 2.
The preparation method of the asphalt mixture comprises the following steps:
respectively preheating 97 parts of limestone aggregate and 3 parts of limestone powder to 190 ℃, and preheating 5.5 parts of hard asphalt cement to 180 ℃; and preserving the heat for later use.
Pouring 190 ℃ limestone aggregate and 180 ℃ hard asphalt cement into a stirring pot preheated to 180 ℃, starting the stirring pot, and stirring for 60s under the conditions that the rotation speed of a stirring blade is 75r/min and the revolution speed is 45 r/min; and adding limestone powder of 190 ℃ into the mixing pot, and continuously mixing for 120s under the conditions that the rotation speed of the mixing blades is 75r/min and the revolution speed is 45r/min to obtain the asphalt mixture.
The performance of the asphalt mixture was measured by the method of example 1, and the results are shown in table 4.
Example 5
1. Hard asphalt cement and preparation thereof
The hard asphalt cement of the embodiment comprises the following components in parts by weight: 49.95 parts of butane deoiled asphalt, 25.0 parts of minus four-line distillate oil, 25.0 parts of furfural extract oil and 0.05 part of polyphosphoric acid.
The preparation method of the hard asphalt cement comprises the following steps:
adding 49.95 parts of butane deoiled asphalt, 25.0 parts of minus four-line distillate oil and 25.0 parts of furfural extract oil into a reaction kettle, and uniformly mixing in a hot melting state to obtain a mixture; the detection shows that the penetration degree of the mixture at 25 ℃ is 96dmm, the wax content is 1.8 percent, and the asphaltene content is 0.9 percent.
And adding 0.05 part of polyphosphoric acid into the mixture, slowly heating to 220 ℃ under the stirring condition, introducing air with the flow of 3.0L/min.kg into the reaction kettle, and reacting for 6 hours to obtain the hard asphalt cement.
The test of the method of example 1 shows that the penetration of the hard asphalt cement at 25 ℃ is 22dmm, the viscosity at 60 ℃ is 14892Pa.s, the high-temperature performance grade is PG94, the low-temperature performance grade is PG-28, the wax content is 1.8%, the asphaltene content is 1.8%, the creep compliance of the multi-stress creep test at 76 ℃ and 3.2KPa is 0.024, and the creep compliance change rate of 0.1 KPa-3.2 KPa is 1.902%.
2. Asphalt mixture and preparation method thereof
The asphalt mixture of the embodiment comprises the following components in parts by weight: 96 parts of diabase aggregate, 4 parts of limestone powder and 5.8 parts of the hard asphalt cement.
Wherein, the mineral aggregate gradation corresponds to the mesh sizes of 16mm, 13.2mm, 9.5mm, 4.75mm, 2.36mm, 1.18mm, 0.6mm, 0.3mm, 0.15mm, 0.075mm, and the weight percentage passage rates are as follows in sequence: 100%, 95%, 70%, 50%, 33%, 26.5%, 13.5%, 12.5%, 9.0%, 7.0%; the physicochemical properties of the coarse aggregate, fine aggregate and stone dust are shown in Table 3 below.
TABLE 3 physicochemical Properties of aggregate and mineral powders
Figure GDA0001432024930000121
Figure GDA0001432024930000131
The preparation method of the asphalt mixture comprises the following steps:
respectively preheating 96 parts of diabase aggregate and 4 parts of limestone powder to 190 ℃, and preheating 5.8 parts of hard asphalt cement to 180 ℃; and preserving the heat for later use.
Pouring diabase aggregate at 190 ℃ and hard asphalt cement at 180 ℃ into a stirring pot preheated to 180 ℃, starting the stirring pot, and stirring for 60s under the conditions that the rotation speed of a stirring blade is 75r/min and the revolution speed is 45 r/min; and adding limestone powder of 190 ℃ into the mixing pot, and continuously mixing for 120s under the conditions that the rotation speed of the mixing blades is 75r/min and the revolution speed is 45r/min to obtain the asphalt mixture.
The performance of the asphalt mixture was measured by the method of example 1, and the results are shown in table 4.
Example 6
1. Hard asphalt cement and preparation thereof
The hard asphalt cement of the embodiment comprises the following components in parts by weight: 54.95 parts of propane deoiled asphalt, 25.0 parts of No. 110 road asphalt, 10.0 parts of furfural extract oil, 10.0 parts of catalytic cracking slurry oil and 0.05 part of phosphoric acid.
The preparation method of the hard asphalt cement comprises the following steps:
adding 54.95 parts of propane deoiled asphalt, 25.0 parts of No. 110 road asphalt, 10.0 parts of furfural extract oil and 10.0 parts of catalytic cracking slurry oil into a reaction kettle, and uniformly mixing in a hot melting state to obtain a mixture; the test shows that the penetration degree of the mixture at 25 ℃ is 134dmm, the wax content is 1.6 percent, and the asphaltene content is 1.6 percent.
And adding 0.05 part of phosphoric acid into the mixture, slowly heating to 200 ℃ under the stirring condition, introducing 3.0L/min.kg of air into the reaction kettle, and reacting for 10 hours to obtain the hard asphalt cement.
The test of the method of example 1 shows that the penetration of the hard asphalt cement at 25 ℃ is 19dmm, the viscosity at 60 ℃ is 15032Pa.s, the high-temperature performance grade is PG94, the low-temperature performance grade is PG-28, the wax content is 1.4%, the asphaltene content is 1.7%, the creep compliance of the multi-stress creep test at 76 ℃ and 3.2KPa is 0.027, and the creep compliance change rate of 0.1 KPa-3.2 KPa is 1.921%.
2. Asphalt mixture and preparation method thereof
The asphalt mixture of the embodiment comprises the following components in parts by weight: 96 parts of limestone aggregate, 4 parts of limestone powder and 6.4 parts of the hard asphalt cement.
Wherein, the mineral aggregate gradation corresponds to the mesh sizes of 16mm, 13.2mm, 9.5mm, 4.75mm, 2.36mm, 1.18mm, 0.6mm, 0.3mm, 0.15mm, 0.075mm, and the weight percentage passage rates are as follows in sequence: 100%, 95%, 70%, 50%, 33%, 26.5%, 13.5%, 12.5%, 9.0%, 7.0%; the physicochemical properties of the coarse aggregate, fine aggregate and stone dust were the same as in example 2.
The preparation method of the asphalt mixture comprises the following steps:
respectively preheating 96 parts of limestone aggregate and 4 parts of limestone powder to 190 ℃, and preheating 6.4 parts of hard asphalt cement to 180 ℃; and preserving the heat for later use.
Pouring 190 ℃ limestone aggregate and 180 ℃ hard asphalt cement into a stirring pot preheated to 180 ℃, starting the stirring pot, and stirring for 60s under the conditions that the rotation speed of a stirring blade is 75r/min and the revolution speed is 45 r/min; and adding limestone powder of 190 ℃ into the mixing pot, and continuously mixing for 120s under the conditions that the rotation speed of the mixing blades is 75r/min and the revolution speed is 45r/min to obtain the asphalt mixture.
The performance of the asphalt mixture was measured by the method of example 1, and the results are shown in table 4.
Example 7
1. Hard asphalt cement and preparation thereof
The hard asphalt cement of the embodiment comprises the following components in parts by weight: 59.95 parts of propane deoiled asphalt, 30.0 parts of No. 70 road asphalt, 5.0 parts of furfural extract oil, 5.0 parts of catalytic cracking slurry oil and 0.05 part of phosphoric acid.
The preparation method of the hard asphalt cement comprises the following steps:
adding 59.95 parts of propane deoiled asphalt, 30.0 parts of No. 70 road asphalt, 5.0 parts of furfural extract oil and 5.0 parts of catalytic cracking slurry oil into a reaction kettle, and uniformly mixing in a hot melting state to obtain a mixture; through detection, the penetration degree of the mixture at 25 ℃ is 86dmm, the wax content is 1.4 percent, and the asphaltene content is 1.6 percent.
And adding 0.05 part of phosphoric acid into the mixture, slowly heating to 200 ℃ under the stirring condition, introducing 3.0L/min.kg of air into the reaction kettle, and reacting for 8 hours to obtain the hard asphalt cement.
The method of example 1 is adopted for detection, the penetration of the hard asphalt cement at 25 ℃ is 20dmm, the viscosity at 60 ℃ is 16892Pa.s, the high-temperature performance grade is PG100, the low-temperature performance grade is PG-22, the wax content is 1.2%, the asphaltene content is 0.7%, the creep compliance of a multi-stress creep test at 76 ℃ and 3.2KPa is 0.024, and the creep compliance change rate of 0.1 KPa-3.2 KPa is 2.043%.
2. Asphalt mixture and preparation method thereof
The asphalt mixture of the embodiment comprises the following components in parts by weight: 96 parts of limestone aggregate, 4 parts of limestone powder and 6 parts of the hard asphalt cement.
Wherein, the mineral aggregate gradation corresponds to the mesh sizes of 16mm, 13.2mm, 9.5mm, 4.75mm, 2.36mm, 1.18mm, 0.6mm, 0.3mm, 0.15mm, 0.075mm, and the weight percentage passage rates are as follows in sequence: 100%, 95%, 70%, 50%, 33%, 26.5%, 13.5%, 12.5%, 9.0%, 7.0%; the physicochemical properties of the coarse aggregate, fine aggregate and stone dust were the same as in example 2.
The preparation method of the asphalt mixture comprises the following steps:
respectively preheating 96 parts of limestone aggregate and 4 parts of limestone powder to 190 ℃, and preheating 6.0 parts of hard asphalt cement to 180 ℃; and preserving the heat for later use.
Pouring 190 ℃ limestone aggregate and 180 ℃ hard asphalt cement into a stirring pot preheated to 180 ℃, starting the stirring pot, and stirring for 60s under the conditions that the rotation speed of a stirring blade is 75r/min and the revolution speed is 45 r/min; and adding limestone powder of 190 ℃ into the mixing pot, and continuously mixing for 120s under the conditions that the rotation speed of the mixing blades is 75r/min and the revolution speed is 45r/min to obtain the asphalt mixture.
The performance of the asphalt mixture was measured by the method of example 1, and the results are shown in table 4.
Example 8
1. Hard asphalt cement and preparation thereof
The hard asphalt cement of the embodiment comprises the following components in parts by weight: 59.95 parts of propane deoiled asphalt, 25.0 parts of No. 50 road asphalt, 7.5 parts of furfural extract oil, 7.5 parts of catalytic cracking slurry oil and 0.05 part of phosphoric acid.
The preparation method of the hard asphalt cement comprises the following steps:
adding 59.95 parts of propane deoiled asphalt, 25.0 parts of No. 50 road asphalt, 7.5 parts of furfural extract oil and 7.5 parts of catalytic cracking slurry oil into a reaction kettle, and uniformly mixing in a hot melting state to obtain a mixture; through detection, the penetration degree of the mixture at 25 ℃ is 55dmm, the wax content is 1.7 percent, and the asphaltene content is 1.6 percent.
And adding 0.05 part of phosphoric acid into the mixture, slowly heating to 200 ℃ under the stirring condition, introducing 3.0L/min.kg of air into the reaction kettle, and reacting for 8 hours to obtain the hard asphalt cement.
The method of example 1 is adopted for detection, the penetration of the hard asphalt cement at 25 ℃ is 12dmm, the viscosity at 60 ℃ is 16492Pa.s, the high-temperature performance grade is PG100, the low-temperature performance grade is PG-22, the wax content is 1.7%, the asphaltene content is 0.7%, the creep compliance of a multi-stress creep test at 76 ℃ and 3.2KPa is 0.036, and the creep compliance change rate of 0.1 KPa-3.2 KPa is 2.172%.
2. Asphalt mixture and preparation method thereof
The asphalt mixture of the embodiment comprises the following components in parts by weight: 96 parts of limestone aggregate, 4 parts of limestone powder and 5.6 parts of the hard asphalt cement.
Wherein, the mineral aggregate gradation corresponds to the mesh sizes of 16mm, 13.2mm, 9.5mm, 4.75mm, 2.36mm, 1.18mm, 0.6mm, 0.3mm, 0.15mm, 0.075mm, and the weight percentage passage rates are as follows in sequence: 100%, 95%, 70%, 50%, 33%, 26.5%, 13.5%, 12.5%, 9.0%, 7.0%; the physicochemical properties of the coarse aggregate, fine aggregate and stone dust were the same as in example 2.
The preparation method of the asphalt mixture comprises the following steps:
respectively preheating 96 parts of limestone aggregate and 4 parts of limestone powder to 190 ℃, and preheating 5.6 parts of hard asphalt cement to 180 ℃; and preserving the heat for later use.
Pouring 190 ℃ limestone aggregate and 180 ℃ hard asphalt cement into a stirring pot preheated to 180 ℃, starting the stirring pot, and stirring for 60s under the conditions that the rotation speed of a stirring blade is 75r/min and the revolution speed is 45 r/min; and adding limestone powder of 190 ℃ into the mixing pot, and continuously mixing for 120s under the conditions that the rotation speed of the mixing blades is 75r/min and the revolution speed is 45r/min to obtain the asphalt mixture.
The performance of the asphalt mixture was measured by the method of example 1, and the results are shown in table 4.
Example 9
1. Hard asphalt cement and preparation thereof
The hard asphalt cement of the embodiment comprises the following components in parts by weight: 29.95 parts of butane deoiled asphalt, 50.0 parts of No. 130 road asphalt, 5.0 parts of furfural extract oil, 15.0 parts of catalytic cracking slurry oil and 0.05 part of phosphoric acid.
The preparation method of the hard asphalt cement comprises the following steps:
adding 29.95 parts of butane deoiled asphalt, 50.0 parts of No. 130 road asphalt, 5.0 parts of furfural extract oil and 15.0 parts of catalytic cracking slurry oil into a reaction kettle, and uniformly mixing in a hot melting state to obtain a mixture; through detection, the penetration degree of the mixture at 25 ℃ is 136dmm, the wax content is 1.7 percent, and the asphaltene content is 0.6 percent.
And adding 0.05 part of phosphoric acid into the mixture, slowly heating to 200 ℃ under the stirring condition, introducing 3.0L/min.kg of air into the reaction kettle, and reacting for 8 hours to obtain the hard asphalt cement.
The method of example 1 is adopted for detection, the penetration of the hard asphalt cement at 25 ℃ is 16dmm, the viscosity at 60 ℃ is 12330Pa.s, the high-temperature performance grade is PG100, the low-temperature performance grade is PG-28, the wax content is 1.4%, the asphaltene content is 0.6%, the creep compliance of a multi-stress creep test at 76 ℃ and 3.2KPa is 0.023, and the creep compliance change rate of 0.1 KPa-3.2 KPa is 2.031%.
2. Asphalt mixture and preparation method thereof
The asphalt mixture of the embodiment comprises the following components in parts by weight: 96 parts of limestone aggregate, 4 parts of limestone powder and 5.8 parts of the hard asphalt cement.
Wherein, the mineral aggregate gradation corresponds to the mesh sizes of 16mm, 13.2mm, 9.5mm, 4.75mm, 2.36mm, 1.18mm, 0.6mm, 0.3mm, 0.15mm, 0.075mm, and the weight percentage passage rates are as follows in sequence: 100%, 95%, 70%, 50%, 33%, 26.5%, 13.5%, 12.5%, 9.0%, 7.0%; the physicochemical properties of the coarse aggregate, fine aggregate and stone dust were the same as in example 2.
The preparation method of the asphalt mixture comprises the following steps:
respectively preheating 96 parts of limestone aggregate and 4 parts of limestone powder to 190 ℃, and preheating 5.8 parts of hard asphalt cement to 180 ℃; and preserving the heat for later use.
Pouring 190 ℃ limestone aggregate and 180 ℃ hard asphalt cement into a stirring pot preheated to 180 ℃, starting the stirring pot, and stirring for 60s under the conditions that the rotation speed of a stirring blade is 75r/min and the revolution speed is 45 r/min; and adding limestone powder of 190 ℃ into the mixing pot, and continuously mixing for 120s under the conditions that the rotation speed of the mixing blades is 75r/min and the revolution speed is 45r/min to obtain the asphalt mixture.
The performance of the asphalt mixture was measured by the method of example 1, and the results are shown in table 4.
Comparative example 1
1. Hard asphalt cement and preparation thereof
The hard asphalt cement of the comparative example consists of the following components in parts by weight: 29.9 parts of propane-killed de-oiled asphalt, 50.0 parts of Korean SK 90 road asphalt, 5.0 parts of furfural extract oil of Clarityiene petrochemical company, 15.0 parts of catalytic cracking slurry oil of Clarityiene petrochemical company and 0.1 part of phosphoric acid.
The preparation method of the hard asphalt cement comprises the following steps:
adding 29.9 parts of esomepropane deoiled asphalt, 50.0 parts of Korean SK 90 road asphalt, 5.0 parts of furfural extract oil of Claritylium chemical company and 15.0 parts of catalytic cracking slurry oil of the Claritylium chemical company into a reaction kettle, and uniformly mixing in a hot melting state to obtain a mixture; the detection shows that the penetration degree of the mixture at 25 ℃ is 118dmm, the wax content is 1.9 percent, and the asphaltene content is 10.7 percent.
And adding 0.1 part of phosphoric acid into the mixture, slowly heating to 200 ℃ under the stirring condition, introducing air with the flow of 3.0L/min.kg into the reaction kettle, and reacting for 8 hours to obtain the hard asphalt cement.
The method of example 1 is adopted for detection, the penetration of the hard asphalt cement at 25 ℃ is 21dmm, the viscosity at 60 ℃ is 8728Pa.s, the high-temperature performance grade is PG94, the low-temperature performance grade is PG-10, the wax content is 1.8%, the asphaltene content is 29.4%, the creep compliance of a multi-stress creep test at 76 ℃ and 3.2KPa is 0.171, and the creep compliance change rate of 0.1 KPa-3.2 KPa is 7.268%.
2. Asphalt mixture and preparation method thereof
The asphalt mixture of the comparative example consists of the following components in parts by weight: 96 parts of limestone aggregate, 4 parts of limestone powder and 5.8 parts of the hard asphalt cement.
Wherein, the mineral aggregate gradation corresponds to the mesh sizes of 16mm, 13.2mm, 9.5mm, 4.75mm, 2.36mm, 1.18mm, 0.6mm, 0.3mm, 0.15mm, 0.075mm, and the weight percentage passage rates are as follows in sequence: 100%, 95%, 70%, 50%, 33%, 26.5%, 13.5%, 12.5%, 9.0%, 7.0%; the physicochemical properties of the coarse aggregate, fine aggregate and stone dust were the same as in example 1.
The preparation method of the asphalt mixture comprises the following steps:
respectively preheating 96 parts of limestone aggregate and 4 parts of limestone powder to 190 ℃, and preheating 5.8 parts of hard asphalt cement to 180 ℃; and preserving the heat for later use.
Pouring 190 ℃ limestone aggregate and 180 ℃ hard asphalt cement into a stirring pot preheated to 180 ℃, starting the stirring pot, and stirring for 60s under the conditions that the rotation speed of a stirring blade is 75r/min and the revolution speed is 45 r/min; and adding limestone powder of 190 ℃ into the mixing pot, and continuously mixing for 120s under the conditions that the rotation speed of the mixing blades is 75r/min and the revolution speed is 45r/min to obtain the asphalt mixture.
The performance of the asphalt mixture was measured by the method of example 1, and the results are shown in table 4.
Comparative example 2
1. Hard asphalt cement and preparation thereof
The hard asphalt cement of the comparative example consists of the following components in parts by weight: 34.9 parts of kramerin petrochemical propane deoiled asphalt, 45.0 parts of Esso No. 70 road asphalt, 15.0 parts of Jingmen furfural extract oil, 5.0 parts of Jingmen catalytic cracking slurry oil and 0.1 part of phosphoric acid.
The preparation method of the hard asphalt cement comprises the following steps:
adding 34.9 parts of Crayanide propane deoiled asphalt, 45.0 parts of Escholtz No. 70 road asphalt, 15.0 parts of Jingmen furfural extract oil and 5.0 parts of Crayanide company catalytic cracking slurry oil into a reaction kettle, and uniformly mixing in a hot melting state to obtain a mixture; through detection, the penetration degree of the mixture at 25 ℃ is 88dmm, the wax content is 3.0 percent, and the asphaltene content is 11.2 percent.
And adding 0.1 part of phosphoric acid into the mixture, slowly heating to 200 ℃ under the stirring condition, introducing air with the flow of 3.0L/min.kg into the reaction kettle, and reacting for 8 hours to obtain the hard asphalt cement.
The method of example 1 is adopted for detection, the penetration of the hard asphalt cement at 25 ℃ is 18dmm, the viscosity at 60 ℃ is 12560Pa.s, the high-temperature performance grade is PG100, the low-temperature performance grade is PG-10, the wax content is 2.5%, the asphaltene content is 20.3%, the creep compliance of a multi-stress creep test at 76 ℃ and 3.2KPa is 0.054, and the creep compliance change rate of 0.1 KPa-3.2 KPa is 7.686%.
2. Asphalt mixture and preparation method thereof
The asphalt mixture of the comparative example consists of the following components in parts by weight: 96 parts of limestone aggregate, 4 parts of limestone powder and 6.0 parts of the hard asphalt cement.
Wherein, the mineral aggregate gradation corresponds to the mesh sizes of 16mm, 13.2mm, 9.5mm, 4.75mm, 2.36mm, 1.18mm, 0.6mm, 0.3mm, 0.15mm, 0.075mm, and the weight percentage passage rates are as follows in sequence: 100%, 95%, 70%, 50%, 33%, 26.5%, 13.5%, 12.5%, 9.0%, 7.0%; the physicochemical properties of the coarse aggregate, fine aggregate and stone dust were the same as in example 1.
The preparation method of the asphalt mixture comprises the following steps:
respectively preheating 96 parts of limestone aggregate and 4 parts of limestone powder to 190 ℃, and preheating 6.0 parts of hard asphalt cement to 180 ℃; and preserving the heat for later use.
Pouring 190 ℃ limestone aggregate and 180 ℃ hard asphalt cement into a stirring pot preheated to 180 ℃, starting the stirring pot, and stirring for 60s under the conditions that the rotation speed of a stirring blade is 75r/min and the revolution speed is 45 r/min; and adding limestone powder of 190 ℃ into the mixing pot, and continuously mixing for 120s under the conditions that the rotation speed of the mixing blades is 75r/min and the revolution speed is 45r/min to obtain the asphalt mixture.
The performance of the asphalt mixture was measured by the method of example 1, and the results are shown in table 4.
TABLE 4 Performance test results for various asphalt mixtures
Figure GDA0001432024930000191
Figure GDA0001432024930000201
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (9)

1. The hard asphalt cement is characterized by comprising the following components in parts by weight:
25-60 parts of a first petroleum component, 15-50 parts of a second petroleum component, 15-35 parts of a third petroleum component and 0.05-0.1 part of a catalyst; wherein:
the first petroleum component is deoiled asphalt, the second petroleum component is at least one of minus four-line distillate oil, vacuum residue oil and road asphalt, the third petroleum component is at least one of furfural extract oil and catalytic cracking slurry oil, and the catalyst is at least one of phosphoric acid and polyphosphoric acid;
the wax content of the hard asphalt cement is less than or equal to 2.0 percent; the asphaltene content is less than or equal to 15 percent;
the hard asphalt cement is characterized in that the penetration at 25 ℃ is 10-25 dmm; the dynamic viscosity is more than or equal to 10000Pa.s at the temperature of 60 ℃; the high-temperature performance grade is PG 94-PG 100; the low-temperature performance grade is PG-22 to PG-28; the creep compliance of the 76 ℃ multi-stress creep test is less than or equal to 0.5, and the change rate of the creep compliance is less than or equal to 75%.
2. The hard asphalt binder according to claim 1, wherein the first petroleum component, the second petroleum component and the third petroleum component are mixed in a hot-melt state to form a mixture having a penetration of 50 to 150dmm at 25 ℃; the wax content is less than or equal to 2.0 percent; the content of asphaltene is less than or equal to 5.0 percent.
3. The method for preparing a hard asphalt binder according to any one of claims 1 to 2, comprising the steps of:
1) uniformly mixing 25-60 parts of a first petroleum component, 15-50 parts of a second petroleum component and 15-35 parts of a third petroleum component in a hot melting state to obtain a mixture;
2) and adding 0.05-0.1 part of catalyst into the mixture, slowly heating under the stirring condition, and introducing air for reaction to obtain the hard asphalt cement.
4. The method of claim 3, wherein step 2) comprises:
adding 0.05-0.1 part of catalyst into the mixture, slowly heating to 190-220 ℃ under the stirring condition, introducing air at the flow rate of 2.5-4.0L/min-kg, and reacting for 6-15 hours to obtain the hard asphalt cement.
5. An asphalt mixture comprising a mineral aggregate and the hard asphalt binder of any one of claims 1 to 2, wherein: the mineral aggregate comprises 95-97 parts by weight of aggregate and 3-5 parts by weight of mineral powder, and the mass ratio of the mineral aggregate to the hard asphalt cement in the asphalt mixture is 100: (5.5-6.5).
6. The asphalt mix according to claim 5, wherein said mineral aggregate is graded as: the sieve plate with the thickness of the sieve plate is characterized by comprising the following components, by weight, 100% of 16mm sieve holes, 90-100% of 13.2mm sieve holes, 55-75% of 9.5mm sieve holes, 45-55% of 4.75mm sieve holes, 28-36% of 2.36mm sieve holes, 18-28% of 1.18mm sieve holes, 12-20% of 0.6mm sieve holes, 9-15% of 0.3mm sieve holes, 8.0-10% of 0.15mm sieve holes and 6.0-7.5% of 0.075mm sieve holes.
7. The method for preparing an asphalt mixture according to claim 5 or 6, characterized by comprising the steps of:
a) respectively preheating aggregate, mineral powder and hard asphalt cement;
b) and stirring and mixing the preheated aggregate and the hard asphalt cement, and stirring and mixing the preheated aggregate and the preheated mineral powder to prepare the asphalt mixture.
8. The method of claim 7, wherein step a) comprises:
respectively preheating the aggregate and the mineral powder to 185-195 ℃, preheating the hard asphalt cement to 175-185 ℃, and preserving heat for later use.
9. The method of claim 7, wherein step b) comprises:
and stirring and mixing the preheated aggregate and the hard asphalt cement for 50-70 seconds under the conditions that the rotation speed of the stirring blades is 72-78 r/min and the revolution speed is 42-48 r/min, and stirring and mixing the preheated aggregate and the hard asphalt cement for 110-130 seconds under the conditions that the rotation speed of the stirring blades is 72-78 r/min and the revolution speed is 42-48 r/min to prepare the asphalt mixture.
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CN1570027A (en) * 2003-07-25 2005-01-26 中国石油天然气股份有限公司 Special matrix asphalt for modified asphalt and its preparation method
CN102816447A (en) * 2012-09-03 2012-12-12 唐晓旭 Production and application methods of ductility-enhancing modifier for road asphalt
CN104327520A (en) * 2014-10-16 2015-02-04 深圳海川新材料科技有限公司 Warm mix asphalt modifier and preparation method thereof, warm mixed asphalt and warm mix asphalt mixture
CN106554170A (en) * 2015-09-25 2017-04-05 中国石油天然气股份有限公司 A kind of modified pitch gap gradation asphalt

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04216867A (en) * 1990-02-21 1992-08-06 Inst Fr Petrole Bituminous substance composition comprising polyurethane foam and thermoplastic polymer residue accompanied with thermosetting resin and production thereof
CN1570027A (en) * 2003-07-25 2005-01-26 中国石油天然气股份有限公司 Special matrix asphalt for modified asphalt and its preparation method
CN102816447A (en) * 2012-09-03 2012-12-12 唐晓旭 Production and application methods of ductility-enhancing modifier for road asphalt
CN104327520A (en) * 2014-10-16 2015-02-04 深圳海川新材料科技有限公司 Warm mix asphalt modifier and preparation method thereof, warm mixed asphalt and warm mix asphalt mixture
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