CN106554170B - Modified asphalt gap-graded asphalt mixture - Google Patents
Modified asphalt gap-graded asphalt mixture Download PDFInfo
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- CN106554170B CN106554170B CN201510622373.7A CN201510622373A CN106554170B CN 106554170 B CN106554170 B CN 106554170B CN 201510622373 A CN201510622373 A CN 201510622373A CN 106554170 B CN106554170 B CN 106554170B
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- 239000010426 asphalt Substances 0.000 title claims abstract description 104
- 239000000203 mixture Substances 0.000 title claims abstract description 51
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 53
- 239000011707 mineral Substances 0.000 claims abstract description 53
- 239000000843 powder Substances 0.000 claims abstract description 10
- 238000012360 testing method Methods 0.000 claims description 111
- 239000000463 material Substances 0.000 claims description 72
- 238000002474 experimental method Methods 0.000 claims description 18
- 238000005056 compaction Methods 0.000 claims description 15
- 235000019738 Limestone Nutrition 0.000 claims description 12
- 239000006028 limestone Substances 0.000 claims description 12
- 238000009864 tensile test Methods 0.000 claims description 12
- 238000005452 bending Methods 0.000 claims description 6
- BDAGIHXWWSANSR-UHFFFAOYSA-M Formate Chemical compound [O-]C=O BDAGIHXWWSANSR-UHFFFAOYSA-M 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims description 4
- 239000004575 stone Substances 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 abstract description 5
- 230000000875 corresponding effect Effects 0.000 description 16
- 238000005259 measurement Methods 0.000 description 6
- 239000003208 petroleum Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000002929 anti-fatigue Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000002596 correlated effect Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000009661 fatigue test Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 238000012795 verification Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000004567 concrete Substances 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The modified asphalt graded asphalt mixture comprises mineral aggregate and modified asphalt, wherein the mineral aggregate consists of 93-96% of aggregate and 4-7% of mineral powder, the mineral aggregate accounts for 100 parts by mass in the asphalt mixture, and the modified asphalt accounts for 4.0-4.7 parts by mass; wherein, the aggregate is divided into three groups according to the particle size: a first group of aggregates: 10-15 mm; a second group of aggregates: 3-5 mm; aggregate of the third group: less than or equal to 3mm, the mass percentage of the first group of aggregates to the total mass of the mineral aggregate is 40-66%, the mass percentage of the second group of aggregates to the total mass of the mineral aggregate is 10-24%, the mass percentage of the third group of aggregates to the total mass of the mineral aggregate is 20-30%, and the mass percentages of the three groups of aggregates cannot simultaneously take the minimum value or the maximum value. The asphalt mixture of the invention has better high temperature performance, modulus performance, fatigue resistance performance and durability.
Description
Technical field
The present invention relates to road surfacing materials more particularly to a kind of low grade modified pitch gap gradation high-performance pitch to mix
Material.
Background technique
With China's rapid development of economy, the swift and violent growth of traffic volume of highway, the medium-and-large-sized goods stock of haulage vehicle
Specific gravity is continuously increased, and overload of vehicle phenomenon is very universal, and continuous high temperature weather takes place frequently in recent years in addition, so that track becomes current
One of most common disease of China Higher grade asphalt road surface has seriously affected the safety of road surface running vehicle, comfort and resistance to
Long property.It is in all parts of the country in Asphalt Mixture Design, Pavement Structure Combination design etc. in order to improve the anti-rut behavior of bituminous pavement
Aspect has done a large amount of trial and exploration, although achieving certain achievement, track disease is still remained.By low mark
The progress of number pitch, new material technology, asphalt mixture design theory and method of evaluating performance, some low grade novel asphalt mixtures
It is the effective technical way for promoting pavement durability, improving mixture modulus and high-temperature stability.
Low grade pitch is successfully applied since its needle penetration is lower, softening point is higher, has preferable high-temperature stability
In High Modulus Asphalt Mixture, and low grade pitch not only can be used alone, and can also be used in combination with modified pitch,
To improve the cost performance of bituminous pavement.Compared with traditional modified asphalt mixture, modified low grade asphalt is reaching
The modulus that SBS volume can be reduced under conditions of same high temperature performance, improve mixture is mixed using the modified low grade pitch of SBS
Material substitutes traditional modified asphalt mixture, can be used for the bituminous pavement of long-life economic benefit, and realization mentions high performance same
When reduce cost purpose.The production of low grade pitch simultaneously and large-scale promotion application will also bring huge for oil play
The market space.
Summary of the invention
The object of the present invention is to provide a kind of modified pitch gap gradation asphalts.
In order to achieve the above objectives, the present invention provides a kind of modified pitch gap gradation asphalt, including mineral aggregate and modification
Pitch, the mineral aggregate by 93~96% gather materials and 4~7% miberal powder forms, the modified pitch is the modified drip of No. 50 SBS
Blueness, the asphalt Mineral Material are 100 mass parts, and the modified pitch is 4.0~4.7 mass parts；Wherein, described to gather materials
Lithology be basalt or limestone, be divided into three groups: first groups according to partial size and gather materials: 10~15mm；Second group is gathered materials: 3~
5mm；Third group is gathered materials :≤3mm, and the mass percent that first group of aggregate quality accounts for mineral aggregate gross mass is 40%~66%,
The mass percent that second group of aggregate quality accounts for mineral aggregate gross mass is 10%~24%, and the third group aggregate quality accounts for mine
Expect gross mass mass percent be 20%~30%, and three groups of mass percents gathered materials cannot be minimized simultaneously or
Maximum value, three groups of quality sums gathered materials account for the 93~96% of mineral aggregate gross mass.
Wherein, described three groups percent of pass of the formate gradation composition between sieve pore 4mm~10mm that gather materials are no more than 15%.
Wherein, minimum asphalt content is determined by abundance coefficient K in the asphalt, K > 2.55.
Wherein, the compacted thickness of the asphalt is 7~16cm.
Wherein, the voidage VV ﹤ 6% of the gyratory compaction test specimen of the asphalt.
Wherein, track rate≤7.5% corresponding to the French wheel tracking test operation of the asphalt 30000 times.
Wherein, the dynamic stability of the Chinese wheel tracking test of the asphalt is greater than 3000 times/mm.
Wherein, composite modulus E of the asphalt under the conditions of 15 DEG C of test temperature, test frequency 10HZ >
9000MPa。
Wherein, the asphalt under the conditions of 10 DEG C of test temperature, test frequency 25Hz, 80 μ ε of strain level two
Point fatigue life number >=1,000,000 time.
Wherein, asphalt Ratio of split strength TSR > 80% in indirect tensile test on frozen-thaw.
Wherein, asphalt bending failure in low temperature the small beam experiment strains >=2500 μ ε.
The beneficial effects of the present invention are:
With preferable high temperatures, modulus properties, anti-fatigue performance and endurance quality；Used in road cutting optimal, can reduce
The strain that bituminous concrete generates under Vehicle Load, improves the ability of the antifatigue and Rut resistance on road surface；It is conducive to extend
Service life of road surface and maintenance cycle, increase economic efficiency.
Specific embodiment
The present invention will be further described combined with specific embodiments below.
A kind of modified pitch gap gradation asphalt, including mineral aggregate and modified pitch, the mineral aggregate is by 93~96%
The miberal powder composition to gather materials with 4~7%, the modified pitch is No. 50 SBS modified pitch, and the asphalt Mineral Material is
100 mass parts, the modified pitch are 4.0~4.7 mass parts；Wherein, the lithology gathered materials is basalt or limestone, is pressed
It is divided into three groups: first groups according to partial size to gather materials: 10~15mm；Second group is gathered materials: 3~5mm；Third group is gathered materials :≤3mm, and described
The mass percent that one group of aggregate quality accounts for mineral aggregate gross mass is 40%~66%, and second group of aggregate quality accounts for the total matter of mineral aggregate
The mass percent of amount be 10%~24%, the third group aggregate quality account for mineral aggregate gross mass mass percent be 20%~
30%, and three groups of mass percents gathered materials cannot be minimized simultaneously or maximum value, three groups of quality gathered materials it
With account for the 93~96% of mineral aggregate gross mass.
Wherein, described three groups percent of pass of the formate gradation composition between sieve pore 4mm~10mm that gather materials are no more than 15%.
Wherein, minimum asphalt content is determined by abundance coefficient K in the asphalt, K > 2.55.
Wherein, the compacted thickness of the asphalt is 7~16cm.
Wherein, the voidage VV ﹤ 6% of the gyratory compaction test specimen of the asphalt.
Wherein, track rate≤7.5% corresponding to the French wheel tracking test operation of the asphalt 30000 times.
Wherein, the dynamic stability of the Chinese wheel tracking test of the asphalt is greater than 3000 times/mm.
Wherein, composite modulus E of the asphalt under the conditions of 15 DEG C of test temperature, test frequency 10HZ >
9000MPa。
Wherein, the asphalt under the conditions of 10 DEG C of test temperature, test frequency 25Hz, 80 μ ε of strain level two
Point fatigue life number >=1,000,000 time.
Wherein, asphalt Ratio of split strength TSR > 80% in indirect tensile test on frozen-thaw.
Wherein, asphalt bending failure in low temperature the small beam experiment strains >=2500 μ ε.
The present invention using 50#SBS pitch as cementitious matter, on the one hand lean on the low needle penetration of low grade pitch, high softening-point,
High-temperature stability is improved, on the other hand improves the low temperature and fatigue behaviour of mixture by SBS modifier；It is simultaneously guarantee aggregate
Between rational deployment, overcome particle combine laxity, guarantee skeleton stability, be designed using gap grading, simultaneously
It is required that percent of pass of the formate gradation composition between sieve pore 4mm~10mm that gather materials is no more than 15%.Used in road cutting optimal, vehicle can be reduced
The strain that bituminous concrete generates under load action, improves the ability of the antifatigue and Rut resistance on road surface；And due to low grade
SBS modifier volume 25%~55% can drop in the advantage of pitch itself compared with general modified pitch, have preferable economic effect
Benefit.
Embodiment 1
The present embodiment asphalt mainly by the mineral aggregate of 100 mass parts, the low grade modified pitch of 4.3 mass parts,
For middle low grade modified pitch using No. 50 SBS modified pitch of middle petroleum, mineral aggregate includes limestone aggregates and limestone deposit
The quality of powder, limestone aggregates and miberal powder does not account for the 95% and 5% of mineral aggregate quality, and limestone aggregates press following three particle size range
It is divided into three groups: first groups: 10~15mm of partial size；Second group: 3~5mm of partial size；Third group: partial size≤3mm.Above-mentioned three groups of collection
The quality of material accounts for the percentage of mineral aggregate gross mass successively are as follows: 60.8%, 15.2%, 19%, the effective density ρ of total mineral aggregateG=
2.689g/cm3, gradation such as table 1.
1 gradation table of table (method mark)
According to the mineral aggregate ratio of the present embodiment, mineral effective density ρG, provide bitumen aggregate ratio TLextAnd gather materials in table 1 logical
It crosses rate and calculates abundance coefficient K, abundance coefficient K is calculate by the following formula:
In formula, TLext- bitumen aggregate ratio (pitch weight and mineral aggregate weight ratio), the present embodiment TLext=4.3%
100 Σ=0.25G+2.3S+12s+135f
G-partial size, which is greater than, accounts for total percentage to gather materials gathering materials for 6.3mm,
S-partial size gathering materials between 0.25mm to 6.3mm accounts for the percentage always to gather materials,
S-partial size gathering materials between 0.063mm to 0.25mm accounts for the percentage always to gather materials,
F-partial size, which is less than, accounts for total percentage to gather materials gathering materials for 0.063mm,
α-is intermediate parameters, the ρ of α=2.65/G。
(6.3mm's=59.8%, S=40.2% gathers materials G=100%-40.2% (6.3mm gather materials percent of pass) as known from Table 1
Percent of pass) -7.5% (0.063mm collection of -11% (0.25mm gather materials percent of pass)=29.2%, s=11% (0.25mm percent of pass)
Expect percent of pass)=3.5%, f=7.5%；Obtain the technical requirements that abundance coefficient K=2.68 meets K > 2.55.
Mixing plant will be put by the configured mineral aggregate of above-mentioned gradation, above-mentioned corresponding mass part is added in mix after 10~15 seconds
No. 50 SBS modified pitch of middle petroleum, be stirred for obtaining asphalt in 40~45 seconds.By obtained above-mentioned asphalt into
The test of the following correlated performances of row:
1) gyratory compaction test
Above-mentioned asphalt is made to the test specimen of Φ 150mm, and according in French relevant criterion to asphalt
The technical requirements of gyratory compaction test carry out gyratory compaction test, and test result summarizes such as table 2.
2 gyratory compaction test result of table
2) French wheel tracking test
According to BS EN 12697-22 (French wheel tracking test), long 500mm, width 180mm, height is made in asphalt
The rut test piece of 100mm, 60 DEG C of test temperature, when measuring load cycle-index 100,300,1000,3000,10000,30000,
The deformation values of 15 measurement points.According to the corresponding track rate of the different number of run of measurement result calculating:
The French wheel tracking test result of table 3
3) Chinese wheel tracking test
According to the requirement of pitch and Asphalt Mixture Experiment regulation (JTJ052-2000) T0719, at 60 ± 1 DEG C, 0.7 ±
Wheel tracking test is carried out under the conditions of 0.05MPa, test result is shown in Table 4, can be seen that the present embodiment from test result shown in the table
Mixture have good high temperature stability performance.
4 wheel tracking test dynamic stability of table
4) indirect tensile test on frozen-thaw
Real indirect tensile test on frozen-thaw is carried out according to the requirement of pitch and Asphalt Mixture Experiment regulation (JTJ052-2000), is hit
Real number 50 times, the results are shown in Table 5, and the present embodiment has good water stability ability as can be seen from the test results.
5 indirect tensile test on frozen-thaw result of table
5) girder bend test
According to the requirement of pitch and Asphalt Mixture Experiment regulation (JTJ052-2000) T0715 carried out 6 groups -10 DEG C it is low
Warm girder bend test, as a result average value is shown in Table 6,2935.1 μ ε of failure strain, higher than standard requirements >=2500 μ ε, show this
The mixture of embodiment has the ability for resisting low-temperature deformation well.
6 girder bend test result of table
6) modulus properties are tested
Modulus properties verifying is carried out using two o'clock bending complex modulus test, and 15 DEG C of test temperature, test frequency 10HZ.Examination
Test that the results are shown in Table 7.From the point of view of modulus detection data, the complex modulus of the mixture of the present embodiment meets, and is greater than 9000MPa
Technical requirements.
7 mixture modulus test result of table
7) experiment on fatigue properties
Fatigue behaviour is using French two o'clock repeated bend test (Europe superscript test method EN12697-24), test temperature 10
DEG C, test frequency 25Hz, 130 μ ε of strain level, test result such as the following table 8.From the point of view of fatigue data, the present embodiment is mixed
It closes material fatigue behaviour and meets corresponding technical requirements.
8 durability High Modulus Asphalt Mixture fatigue test results of table
The performance verification of the above mixture experiments have shown that: the building stones gradation of the present embodiment asphalt and corresponding pitch are used
Amount and the asphalt formed are able to satisfy the requirement of required volume index and every pavement performance index.
Embodiment 2
The present embodiment asphalt mainly by the mineral aggregate of 100 mass parts, the low grade modified pitch of 4.6 mass parts,
For middle low grade modified pitch using No. 50 SBS modified pitch of middle petroleum, mineral aggregate includes basalt aggregate and limestone deposit
The quality of powder, basalt aggregate and miberal powder does not account for the 93% and 7% of mineral aggregate quality, and basalt aggregate presses following three particle size range
It is divided into three groups: first groups: 10~15mm of partial size；Second group: 3~5mm of partial size；Third group: partial size≤3mm.Above-mentioned three groups of collection
The quality of material accounts for the percentage of mineral aggregate gross mass successively are as follows: 65%, 11%, 24%, the effective density ρ of total mineral aggregateG=2.714g/
cm3, gradation such as table 9.
9 gradation table of table (method mark)
According to the mineral aggregate ratio of the present embodiment, mineral effective density ρG, provide bitumen aggregate ratio TLextAnd gather materials in table 1
Percent of pass calculates abundance coefficient K, and abundance coefficient K is calculate by the following formula:
In formula, TLext- bitumen aggregate ratio (pitch weight and mineral aggregate weight ratio), the present embodiment TLext=4.6%
100 Σ=0.25G+2.3S+12s+135f
G-partial size, which is greater than, accounts for total percentage to gather materials gathering materials for 6.3mm,
S-partial size gathering materials between 0.25mm to 6.3mm accounts for the percentage always to gather materials,
S-partial size gathering materials between 0.063mm to 0.25mm accounts for the percentage always to gather materials,
F-partial size, which is less than, accounts for total percentage to gather materials gathering materials for 0.063mm,
α-is intermediate parameters, the ρ of α=2.65/G。
(6.3mm's=56.3%, S=43.7% gathers materials G=100%-43.7% (6.3mm gather materials percent of pass) as known from Table 9
Percent of pass) -8.1% (0.063mm collection of -13% (0.25mm gather materials percent of pass)=30.7%, s=13% (0.25mm percent of pass)
Expect percent of pass)=4.9%, f=8.1%；Obtain the technical requirements that abundance coefficient K=2.84 meets K > 2.55.
Mixing plant will be put by the configured mineral aggregate of above-mentioned gradation, above-mentioned corresponding mass part is added in mix after 10~15 seconds
No. 50 SBS modified pitch of middle petroleum, be stirred for obtaining asphalt in 40~45 seconds.By obtained above-mentioned asphalt into
The test of the following correlated performances of row:
1) gyratory compaction test
Above-mentioned asphalt is made to the test specimen of Φ 150mm, and according in French relevant criterion to asphalt
The technical requirements of gyratory compaction test carry out gyratory compaction test, and test result summarizes such as table 10.
10 gyratory compaction test result of table
2) French wheel tracking test
According to BS EN 12697-22 (French wheel tracking test), long 500mm, width 180mm, height is made in asphalt
The rut test piece of 100mm, 60 DEG C of test temperature, when measuring load cycle-index 100,300,1000,3000,10000,30000,
The deformation values of 15 measurement points.According to the corresponding track rate of the different number of run of measurement result calculating:
The French wheel tracking test result of table 11
3) Chinese wheel tracking test
According to the requirement of pitch and Asphalt Mixture Experiment regulation (JTJ052-2000) T0719, at 60 ± 1 DEG C, 0.7 ±
Wheel tracking test is carried out under the conditions of 0.05MPa, test result is shown in Table 12, can be seen that this implementation from test result shown in the table
The mixture of example has good high temperature stability performance.
12 wheel tracking test dynamic stability of table
4) indirect tensile test on frozen-thaw
Real indirect tensile test on frozen-thaw is carried out according to the requirement of pitch and Asphalt Mixture Experiment regulation (JTJ052-2000), is hit
Real number 50 times, the results are shown in Table 13, and the present embodiment has good water stability ability as can be seen from the test results.
13 indirect tensile test on frozen-thaw result of table
5) girder bend test
According to the requirement of pitch and Asphalt Mixture Experiment regulation (JTJ052-2000) T0715 carried out 6 groups -10 DEG C it is low
Warm girder bend test, as a result average value is shown in Table 14,2833.6 μ ε of failure strain, higher than standard requirements >=2500 μ ε, show
The mixture of the present embodiment has the ability for resisting low-temperature deformation well.
14 girder bend test result of table
6) modulus properties are tested
Modulus properties verifying is carried out using two o'clock bending complex modulus test, and 15 DEG C of test temperature, test frequency 10HZ.Examination
It is as shown in Table 15 to test result.From the point of view of modulus detection data, the complex modulus of the mixture of the present embodiment meets, and is greater than
The technical requirements of 9000MPa.
15 mixture modulus test result of table
7) experiment on fatigue properties
Fatigue behaviour is using French two o'clock repeated bend test (Europe superscript test method EN12697-24), test temperature 10
DEG C, test frequency 25Hz, 130 μ ε of strain level, test result such as the following table 16.
From the point of view of fatigue data, the fatigue properties of asphalt mixture of the present embodiment meets corresponding technical requirements.
16 mixture fatigue test results of table
The performance verification of the above mixture experiments have shown that: the building stones gradation of the present embodiment asphalt and corresponding pitch are used
Amount and the asphalt formed are able to satisfy the requirement of required volume index and every pavement performance index.
Embodiment 3
The present embodiment asphalt mainly by the mineral aggregate of 100 mass parts, the low grade modified pitch of 4.1 mass parts,
For middle low grade modified pitch using No. 50 SBS modified pitch of middle petroleum, mineral aggregate includes limestone aggregates and limestone deposit
The quality of powder, limestone aggregates and miberal powder does not account for the 96% and 4% of mineral aggregate quality, and limestone aggregates press following three particle size range
It is divided into three groups: first groups: 10~15mm of partial size；Second group: 3~5mm of partial size；Third group: partial size≤3mm.Above-mentioned three groups of collection
The quality of material accounts for the percentage of mineral aggregate gross mass successively are as follows: 48%, 23%, 29%, the effective density ρ of total mineral aggregateG=2.681g/
cm3, gradation such as table 17.
17 gradation table of table (method mark)
According to the mineral aggregate ratio of the present embodiment, mineral effective density ρG, provide bitumen aggregate ratio TLextAnd gather materials in table 1 logical
It crosses rate and calculates abundance coefficient K, abundance coefficient K is calculate by the following formula:
In formula, TLext- bitumen aggregate ratio (pitch weight and mineral aggregate weight ratio), the present embodiment TLext=4.3%
100 Σ=0.25G+2.3S+12s+135f
G-partial size, which is greater than, accounts for total percentage to gather materials gathering materials for 6.3mm,
S-partial size gathering materials between 0.25mm to 6.3mm accounts for the percentage always to gather materials,
S-partial size gathering materials between 0.063mm to 0.25mm accounts for the percentage always to gather materials,
F-partial size, which is less than, accounts for total percentage to gather materials gathering materials for 0.063mm,
α-is intermediate parameters, the ρ of α=2.65/G。
G=100%-38.3% (6.3mm gather materials percent of pass)=61.7%, S=38.3% (6.3mm collection as known from Table 17
Material percent of pass) -10.7% (0.25mm gather materials percent of pass)=27.6%, s=10.7% (0.25mm percent of pass) -6.9%
(0.063mm gather materials percent of pass)=3.8%, f=6.9%；Obtain the technical requirements that abundance coefficient K=2.58 meets K > 2.55.
Mixing plant will be put by the configured mineral aggregate of above-mentioned gradation, above-mentioned corresponding mass part is added in mix after 10~15 seconds
No. 50 SBS modified pitch of middle petroleum, be stirred for obtaining asphalt in 40~45 seconds.By obtained above-mentioned asphalt into
The test of the following correlated performances of row:
1) gyratory compaction test
Above-mentioned asphalt is made to the test specimen of Φ 150mm, and according in French relevant criterion to asphalt
The technical requirements of gyratory compaction test carry out gyratory compaction test, and test result summarizes such as table 18.
18 gyratory compaction test result of table
2) French wheel tracking test
According to BS EN 12697-22 (French wheel tracking test), long 500mm, width 180mm, height is made in asphalt
The rut test piece of 100mm, 60 DEG C of test temperature, when measuring load cycle-index 100,300,1000,3000,10000,30000,
The deformation values of 15 measurement points.According to the corresponding track rate of the different number of run of measurement result calculating:
The French wheel tracking test result of table 19
3) Chinese wheel tracking test
According to the requirement of pitch and Asphalt Mixture Experiment regulation (JTJ052-2000) T0719, at 60 ± 1 DEG C, 0.7 ±
Wheel tracking test is carried out under the conditions of 0.05MPa, test result is shown in Table 20, can be seen that this implementation from test result shown in the table
The mixture of example has good high temperature stability performance.
20 wheel tracking test dynamic stability of table
4) indirect tensile test on frozen-thaw
Real indirect tensile test on frozen-thaw is carried out according to the requirement of pitch and Asphalt Mixture Experiment regulation (JTJ052-2000), is hit
Real number 50 times, the results are shown in Table 21, and the present embodiment has good water stability ability as can be seen from the test results.
21 indirect tensile test on frozen-thaw result of table
5) girder bend test
According to the requirement of pitch and Asphalt Mixture Experiment regulation (JTJ052-2000) T0715 carried out 6 groups -10 DEG C it is low
Warm girder bend test, as a result average value is shown in Table 22,2734.0 μ ε of failure strain, higher than standard requirements >=2500 μ ε, show
The mixture of the present embodiment has the ability for resisting low-temperature deformation well.
22 girder bend test result of table
6) modulus properties are tested
Modulus properties verifying is carried out using two o'clock bending complex modulus test, and 15 DEG C of test temperature, test frequency 10HZ.Examination
It is as shown in table 23 to test result.From the point of view of modulus detection data, the complex modulus of the mixture of the present embodiment meets, and is greater than
The technical requirements of 9000MPa.
23 mixture modulus test result of table
7) experiment on fatigue properties
Fatigue behaviour is using French two o'clock repeated bend test (Europe superscript test method EN12697-24), test temperature 10
DEG C, test frequency 25Hz, 130 μ ε of strain level, test result such as the following table 24.From the point of view of fatigue data, the present embodiment
Fatigue properties of asphalt mixture meets corresponding technical requirements.
24 mixture fatigue test results of table
The performance verification of the above mixture experiments have shown that: the building stones gradation of the present embodiment asphalt and corresponding pitch are used
Amount and the asphalt formed are able to satisfy the requirement of required volume index and every pavement performance index.
Certainly, the present invention can also have other various embodiments, without deviating from the spirit and substance of the present invention, ripe
Various corresponding changes and modifications, but these corresponding changes and modifications can be made according to the present invention by knowing those skilled in the art
It all should belong to the protection scope of the claims in the present invention.
Claims (10)
1. a kind of modified pitch gap gradation asphalt, including mineral aggregate and modified pitch, which is characterized in that the mineral aggregate is by 93
~96% miberal powder composition to gather materials with 4~7%, the modified pitch is No. 50 SBS modified pitch, in the asphalt
Mineral aggregate is 100 mass parts, and the modified pitch is 4.0~4.7 mass parts；Wherein, the lithology gathered materials is basalt or stone
Limestone is divided into three groups: first groups according to partial size and gathers materials: 10~15mm；Second group is gathered materials: 3~5mm；Third group is gathered materials :≤3mm,
The mass percent that first group of aggregate quality accounts for mineral aggregate gross mass is 40%~66%, and second group of aggregate quality accounts for mine
The mass percent for expecting gross mass is 10%~24%, and the mass percent that the third group aggregate quality accounts for mineral aggregate gross mass is
20%~30%, and three groups of mass percents gathered materials cannot be minimized simultaneously or maximum value, described three groups are gathered materials
Quality sum accounts for the 93~96% of mineral aggregate gross mass；
Described three groups percent of pass of the formate gradation composition between sieve pore 4mm~10mm that gather materials are no more than 15%.
2. modified pitch gap gradation asphalt according to claim 1, which is characterized in that in the asphalt
Minimum asphalt content determined by abundance coefficient K, K > 2.55.
3. modified pitch gap gradation asphalt according to claim 1, which is characterized in that the asphalt
Compacted thickness is 7~16cm.
4. modified pitch gap gradation asphalt according to claim 1, which is characterized in that the asphalt
The voidage VV ﹤ 6% of gyratory compaction test specimen.
5. modified pitch gap gradation asphalt according to claim 1, which is characterized in that the asphalt
Track rate≤7.5% corresponding to French wheel tracking test operation 30000 times.
6. modified pitch gap gradation asphalt according to claim 1, which is characterized in that the asphalt
The dynamic stability of Chinese wheel tracking test is greater than 3000 times/mm.
7. modified pitch gap gradation asphalt according to claim 1, which is characterized in that the asphalt exists
15 DEG C of test temperature, composite modulus E > 9000MPa under the conditions of test frequency 10Hz.
8. modified pitch gap gradation asphalt according to claim 1, which is characterized in that the asphalt exists
10 DEG C of test temperature, test frequency 25Hz, two o'clock fatigue life number >=1,000,000 time under the conditions of 80 μ ε of strain level.
9. modified pitch gap gradation asphalt according to claim 1, which is characterized in that the asphalt exists
Ratio of split strength TSR > 80% in indirect tensile test on frozen-thaw.
10. modified pitch gap gradation asphalt according to claim 1, which is characterized in that the asphalt
Bending failure strains >=2500 μ ε in low temperature the small beam experiment.
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| CN109306192B (en) * | 2017-07-28 | 2021-04-30 | 中国石油天然气股份有限公司 | Hard asphalt cement and preparation method and application thereof |
| CN109231892A (en) * | 2018-10-09 | 2019-01-18 | 中国石油化工股份有限公司 | A kind of weather-proof particulate formula chromatic cementing agent mixture |
| CN109305776A (en) * | 2018-10-29 | 2019-02-05 | 长沙理工大学 | A kind of high performance asphalt and preparation method thereof |
| CN112573862A (en) * | 2020-12-14 | 2021-03-30 | 江苏一诺路桥工程检测有限公司 | Durable asphalt mixture based on high-modulus asphalt |
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| CN101967048A (en) * | 2010-05-20 | 2011-02-09 | 南京东交工程检测有限公司 | Rubber modified asphalt mixture and preparation and construction methods thereof |
| CN102351469A (en) * | 2011-07-20 | 2012-02-15 | 江苏省交通科学研究院股份有限公司 | Silicon natural mineral asphalt mixture with gap gradation and preparation method thereof |
| CN102503244A (en) * | 2011-10-17 | 2012-06-20 | 交通运输部公路科学研究所 | Composition of skeleton interlocking coarse grain-type high-modulus asphalt concrete and determination method thereof |
| CN103866667A (en) * | 2012-12-10 | 2014-06-18 | 中国石油天然气股份有限公司 | Semi-flexible heavy-load pavement paving structure |
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| CN101967048A (en) * | 2010-05-20 | 2011-02-09 | 南京东交工程检测有限公司 | Rubber modified asphalt mixture and preparation and construction methods thereof |
| CN102351469A (en) * | 2011-07-20 | 2012-02-15 | 江苏省交通科学研究院股份有限公司 | Silicon natural mineral asphalt mixture with gap gradation and preparation method thereof |
| CN102503244A (en) * | 2011-10-17 | 2012-06-20 | 交通运输部公路科学研究所 | Composition of skeleton interlocking coarse grain-type high-modulus asphalt concrete and determination method thereof |
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