CN106554170A - A kind of modified pitch gap gradation asphalt - Google Patents
A kind of modified pitch gap gradation asphalt Download PDFInfo
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- CN106554170A CN106554170A CN201510622373.7A CN201510622373A CN106554170A CN 106554170 A CN106554170 A CN 106554170A CN 201510622373 A CN201510622373 A CN 201510622373A CN 106554170 A CN106554170 A CN 106554170A
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Abstract
A kind of modified pitch gap gradation asphalt, including mineral aggregate and modified pitch, mineral aggregate by 93～96% gather materials and 4～7% breeze is constituted, asphalt Mineral Material is 100 mass parts, and modified pitch is 4.0～4.7 mass parts；Wherein, to gather materials and be divided into three groups according to particle diameter：First group is gathered materials：10～15mm；Second group is gathered materials：3～5mm；3rd group is gathered materials：≤ 3mm, it is 40%～66% that first group of aggregate quality accounts for the mass percent of mineral aggregate gross mass, it is 10%～24% that second group of aggregate quality accounts for the mass percent of mineral aggregate gross mass, it is 20%～30% that 3rd group of aggregate quality accounts for the mass percent of mineral aggregate gross mass, and three groups of mass percents gathered materials can not be while take minimum of a value or maximum.The asphalt of the present invention has preferable high temperatures, modulus properties, anti-fatigue performance and endurance quality.
Description
Technical field
The present invention relates to road surfacing material, more particularly to a kind of drip of low grade modified pitch gap gradation high-performance
Blue or green compound.
Background technology
With China's rapid development of economy, the swift and violent growth of traffic volume of highway, the medium-and-large-sized shipping of haulage vehicle
The proportion of vehicle 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 rut becomes one of modal disease of current China Higher level asphalt road surface, road has been had a strong impact on
Security, comfortableness and durability that face is driven a vehicle.In order to improve the anti-rut behavior of bituminous paving, the whole nation is each
Ground has done substantial amounts of trial and exploration at aspects such as Asphalt Mixture Design, Pavement Structure Combination designs, though
Certain achievement is so achieved, but rut disease is still present.By low grade pitch, new material technology,
The progress of asphalt mixture design theory and method of evaluating performance, some low grade novel asphalt compounds are to lift road
Face durability, the effective technical way for improving compound modulus and high-temperature stability.
Low grade pitch is as its needle penetration is relatively low, softening point is higher, with preferable high-temperature stability, quilt
Be successfully applied to High Modulus Asphalt Mixture, and low grade pitch not only can be used alone, can with change
Property pitch carries out compound use, improves the cost performance of bituminous paving.With traditional modified asphalt mixture phase
Than, modified low grade asphalt can reduce under conditions of same high temperature performance is reached SBS volumes,
The modulus of compound is improved, and traditional modified pitch is substituted using the modified low grade asphalts of SBS and is mixed
Material is closed, can be used for the bituminous paving of long-life economic benefit, while realizing improving performance, reduce cost
Purpose.The production of low grade pitch and large-scale promotion application also will bring huge city for oil play simultaneously
Field space.
The content of the invention
It is an object of the invention to provide a kind of modified pitch gap gradation asphalt.
To reach above-mentioned purpose, the present invention provides a kind of modified pitch gap gradation asphalt, including mineral aggregate
And modified pitch, the mineral aggregate by 93～96% gather materials and 4～7% breeze is constituted, the modified drip
Blue or green is No. 50 SBS modified pitch, and the asphalt Mineral Material is 100 mass parts, the modified drip
Blue or green is 4.0～4.7 mass parts；Wherein, the lithology gathered materials is basalt or limestone, according to particle diameter point
For three groups：First group is gathered materials：10～15mm；Second group is gathered materials：3～5mm；3rd group is gathered materials：≤
3mm, it is 40%～66%, described that first group of aggregate quality accounts for the mass percent of mineral aggregate gross mass
It is 10%～24% that two groups of aggregate qualities account for the mass percent of mineral aggregate gross mass, the 3rd group of aggregate quality
The mass percent for accounting for mineral aggregate gross mass is 20%～30%, and three groups of mass percents gathered materials can not
Take minimum of a value or maximum simultaneously, 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 aperture 4mm～10mm that gather materials are not more than
15%.
Wherein, in the asphalt, minimum asphalt content is determined by abundance coefficient K, K>2.55.
Wherein, the compacted depth of the asphalt is 7～16cm.
Wherein, the voidage VV ﹤ 6% of the gyratory compaction test specimen of the asphalt.
Wherein, the French wheel tracking test of the asphalt run rut rate corresponding to 30000 times≤
7.5%.
Wherein, the dynamic stability of the Chinese wheel tracking test of the asphalt is more than 3000 times/mm.
Wherein, the asphalt is in 15 DEG C of test temperature, compound under the conditions of test frequency 10HZ
Modulus E>9000MPa.
Wherein, the asphalt is in 10 DEG C of test temperature, test frequency 25Hz, 80 μ ε of strain level
Under the conditions of 2 points of fatigue life number of times >=1,000,000 time.
Wherein, asphalt Ratio of split strength TSR in indirect tensile test on frozen-thaw>80%.
Wherein, asphalt bending failure in low temperature the small beam experiment strains >=2500 μ ε.
The invention has the beneficial effects as follows：
With preferable high temperatures, modulus properties, anti-fatigue performance and endurance quality；Used in road cutting optimal,
The strain that bituminous concrete is produced under Vehicle Load can be reduced, the antifatigue and Rut resistance on road surface is improved
Ability；Be conducive to prolonging service life of pavement and maintenance cycle, increase economic efficiency.
Specific embodiment
With reference to specific embodiment, the present invention will be further described.
A kind of modified pitch gap gradation asphalt, including mineral aggregate and modified pitch, the mineral aggregate by 93～
The 96% breeze composition gathered materials with 4～7%, the modified pitch is No. 50 SBS modified pitch, described
Asphalt Mineral Material is 100 mass parts, and the modified pitch is 4.0～4.7 mass parts；Wherein, institute
It is basalt or limestone to state the lithology gathered materials, and is divided into three groups according to particle diameter：First group is gathered materials：10～15mm；
Second group is gathered materials：3～5mm；3rd group is gathered materials：≤ 3mm, it is total that first group of aggregate quality accounts for mineral aggregate
The mass percent of quality is 40%～66%, and second group of aggregate quality accounts for the quality hundred of mineral aggregate gross mass
Divide than being 10%～24%, the mass percent that the 3rd group of aggregate quality accounts for mineral aggregate gross mass is
20%～30%, and three groups of mass percents gathered materials can not be described while take minimum of a value or maximum
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 aperture 4mm～10mm that gather materials are not more than
15%.
Wherein, in the asphalt, minimum asphalt content is determined by abundance coefficient K, K>2.55.
Wherein, the compacted depth of the asphalt is 7～16cm.
Wherein, the voidage VV ﹤ 6% of the gyratory compaction test specimen of the asphalt.
Wherein, the French wheel tracking test of the asphalt run rut rate corresponding to 30000 times≤
7.5%.
Wherein, the dynamic stability of the Chinese wheel tracking test of the asphalt is more than 3000 times/mm.
Wherein, the asphalt is in 15 DEG C of test temperature, compound under the conditions of test frequency 10HZ
Modulus E>9000MPa.
Wherein, the asphalt is in 10 DEG C of test temperature, test frequency 25Hz, 80 μ ε of strain level
Under the conditions of 2 points of fatigue life number of times >=1,000,000 time.
Wherein, asphalt Ratio of split strength TSR in indirect tensile test on frozen-thaw>80%.
Wherein, asphalt bending failure in low temperature the small beam experiment strains >=2500 μ ε.
The present invention using 50#SBS pitches as cementitious matter, low needle penetration on the one hand by low grade pitch,
High softening-point, improve high-temperature stability, on the other hand by SBS modifier improve compound low temperature and
Fatigue behaviour；Simultaneously to ensure the rational deployment between aggregate, the laxity for overcoming particle to combine, it is ensured that bone
Frame stability, is designed using gap grading, while requiring to gather materials formate gradation composition in sieve aperture 4mm～10mm
Between percent of pass be not more than 15%.Used in road cutting optimal, pitch under Vehicle Load can be reduced and mixed
The strain of solidifying local products life, improves the ability of the antifatigue and Rut resistance on road surface；And due to low grade pitch itself
Advantage, SBS modifier volume 25%～55% can be dropped compared with general modified pitch, with preferable Jing
Ji benefit.
Embodiment 1
The present embodiment asphalt is mainly by the mineral aggregate of 100 mass parts, the low grade of 4.3 mass parts
Modified pitch, wherein low grade modified pitch use No. 50 SBS modified pitch of petrochina,
Mineral aggregate includes that the quality of limestone aggregates and limestone mineral powder, limestone aggregates and breeze does not account for mineral aggregate matter
The 95% and 5% of amount, limestone aggregates are divided into three groups by following three particle size range：First group：
10～15mm of particle diameter；Second group：3～5mm of particle diameter；3rd group：Particle diameter≤3mm.Above-mentioned three groups
The quality gathered materials accounts for the percentage of mineral aggregate gross mass and is followed successively by：60.8%th, 15.2%, 19%, total mineral aggregate
Effective density ρG=2.689g/cm3, its level is with such as table 1.
1 grade of table matches somebody with somebody table (method mark)
Mineral aggregate ratio, mineral effective density ρ according to the present embodimentG, provide bitumen aggregate ratio TLextAnd
The percent of pass gathered materials in table 1 calculates abundance coefficient K, and abundance coefficient K is calculated by 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-particle diameter more than gathering materials for 6.3mm accounting for total percentage for gathering materials,
S-particle diameter gathering materials between 0.25mm to 6.3mm accounts for the percentage for always gathering materials,
S-particle diameter gathering materials between 0.063mm to 0.25mm accounts for the percentage for always gathering materials,
F-particle diameter less than gathering materials for 0.063mm accounting for total percentage for gathering materials,
α-be intermediate parameters, α=2.65/ ρG。
G=100%-40.2% (6.3mm gather materials percent of pass)=59.8%, S=40.2% as known from Table 1
(6.3mm gather materials percent of pass) -11% (0.25mm gather materials percent of pass)=29.2%, s=11%
(0.25mm percent of pass) -7.5% (0.063mm gather materials percent of pass)=3.5%, f=7.5%；Obtain
Abundance coefficient K=2.68 meets K>2.55 technical requirements.
The mineral aggregate configured by above-mentioned level is put into into mixing plant, on mix was added after 10～15 seconds
No. 50 SBS modified pitch of petrochina of corresponding mass part are stated, is stirred for obtaining for 40～45 seconds pitch and is mixed
Close material.The above-mentioned asphalt for obtaining is carried out into the test of following correlated performances：
1) gyratory compaction test
Above-mentioned asphalt is made into the test specimen of Φ 150mm, and according in French relevant criterion to drip
The technical requirements of the gyratory compaction test of blue or green compound carry out gyratory compaction test, result of the test collect 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), asphalt make long 500mm,
The rut test piece of wide 180mm, high 100mm, 60 DEG C of test temperature determine load cycle-index 100,
When 300,1000,3000,10000,30000, the deformation values of 15 measurement points.According to measurement knot
Fruit calculates the corresponding rut rate of different number of run：
3 French wheel tracking test result of table
3) Chinese wheel tracking test
According to the requirement of pitch and Asphalt Mixture Experiment code (JTJ052-2000) T0719,60 ± 1
DEG C, wheel tracking test has been carried out under the conditions of 0.7 ± 0.05MPa, result of the test is shown in Table 4, from shown in the table
Result of the test can be seen that the compound of the present embodiment with good high temperature stability performance.
4 wheel tracking test dynamic stability of table
4) indirect tensile test on frozen-thaw
Requirement according to pitch and Asphalt Mixture Experiment code (JTJ052-2000) carries out real freeze thawing and splits
Test is split, striking times 50 times the results are shown in Table 5, as can be seen from the test results the tool of the present embodiment
There is good water stability ability.
5 indirect tensile test on frozen-thaw result of table
5) girder bend test
Requirement according to pitch and Asphalt Mixture Experiment code (JTJ052-2000) T0715 is carried out
6 groups of -10 DEG C of low-temperature bending tests, as a result mean value be shown in Table 6,2935.1 μ ε of failure strain, it is high
Require in standard >=2500 μ ε, show that the compound of the present embodiment becomes with well opposing low temperature
The ability of shape.
6 girder bend test result of table
6) modulus properties test
Modulus properties checking is carried out using 2 points of bending complex modulus tests, 15 DEG C of test temperature, test
Frequency 10HZ.Result of the test is as shown in table 7.From the point of view of modulus detection data, the present embodiment it is mixed
The complex modulus for closing material meets, more than the technical requirements of 9000MPa.
7 compound modulus test result of table
7) experiment on fatigue properties
Fatigue behaviour adopts French 2 points of repeated bend tests (Europe superscript test method EN12697-24),
10 DEG C of test temperature, test frequency 25Hz, 130 μ ε of strain level, result of the test such as table 8 below.From
From the point of view of fatigue data, the fatigue properties of asphalt mixture of the present embodiment meets corresponding technical requirements.
8 durability High Modulus Asphalt Mixture fatigue test results of table
The performance verification test of material mixed above shows：The building stones level of the present embodiment asphalt with and
The asphalt for corresponding to asphalt content and being formed can meet required volume index and every road property
The requirement of energy index.
Embodiment 2
The present embodiment asphalt is mainly by the mineral aggregate of 100 mass parts, the low grade of 4.6 mass parts
Modified pitch, wherein low grade modified pitch use No. 50 SBS modified pitch of petrochina,
Mineral aggregate includes that the quality of basalt aggregate and limestone mineral powder, basalt aggregate and breeze does not account for mineral aggregate matter
The 93% and 7% of amount, basalt aggregate is divided into three groups by following three particle size range：First group：
10～15mm of particle diameter；Second group：3～5mm of particle diameter；3rd group：Particle diameter≤3mm.Above-mentioned three groups
The quality gathered materials accounts for the percentage of mineral aggregate gross mass and is followed successively by：65%th, 11%, 24%, total mineral aggregate
Effective density ρG=2.714g/cm3, its level is with such as table 9.
9 grades of table matches somebody with somebody table (method mark)
Mineral aggregate ratio, mineral effective density ρ according to the present embodimentG, provide bitumen aggregate ratio TLextAnd
The percent of pass gathered materials in table 1 calculates abundance coefficient K, and abundance coefficient K is calculated by 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-particle diameter more than gathering materials for 6.3mm accounting for total percentage for gathering materials,
S-particle diameter gathering materials between 0.25mm to 6.3mm accounts for the percentage for always gathering materials,
S-particle diameter gathering materials between 0.063mm to 0.25mm accounts for the percentage for always gathering materials,
F-particle diameter less than gathering materials for 0.063mm accounting for total percentage for gathering materials,
α-be intermediate parameters, α=2.65/ ρG。
G=100%-43.7% (6.3mm gather materials percent of pass)=56.3%, S=43.7% as known from Table 9
(6.3mm gather materials percent of pass) -13% (0.25mm gather materials percent of pass)=30.7%, s=13% (0.25mm
Percent of pass) -8.1% (0.063mm gather materials percent of pass)=4.9%, f=8.1%；Obtain abundance coefficient
K=2.84 meets K>2.55 technical requirements.
The mineral aggregate configured by above-mentioned level is put into into mixing plant, on mix was added after 10～15 seconds
No. 50 SBS modified pitch of petrochina of corresponding mass part are stated, is stirred for obtaining for 40～45 seconds pitch and is mixed
Close material.The above-mentioned asphalt for obtaining is carried out into the test of following correlated performances：
1) gyratory compaction test
Above-mentioned asphalt is made into the test specimen of Φ 150mm, and according in French relevant criterion to drip
The technical requirements of the gyratory compaction test of blue or green compound carry out gyratory compaction test, result of the test collect 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), asphalt make long 500mm,
The rut test piece of wide 180mm, high 100mm, 60 DEG C of test temperature determine load cycle-index 100,
When 300,1000,3000,10000,30000, the deformation values of 15 measurement points.According to measurement knot
Fruit calculates the corresponding rut rate of different number of run：
11 French wheel tracking test result of table
3) Chinese wheel tracking test
According to the requirement of pitch and Asphalt Mixture Experiment code (JTJ052-2000) T0719,60 ± 1
DEG C, wheel tracking test has been carried out under the conditions of 0.7 ± 0.05MPa, result of the test is shown in Table 12, from shown in the table
Result of the test can be seen that the compound of the present embodiment with good high temperature stability performance.
12 wheel tracking test dynamic stability of table
4) indirect tensile test on frozen-thaw
Requirement according to pitch and Asphalt Mixture Experiment code (JTJ052-2000) carries out real freeze thawing and splits
Test is split, striking times 50 times the results are shown in Table 13, as can be seen from the test results the present embodiment
With good water stability ability.
13 indirect tensile test on frozen-thaw result of table
5) girder bend test
Requirement according to pitch and Asphalt Mixture Experiment code (JTJ052-2000) T0715 is carried out
6 groups of -10 DEG C of low-temperature bending tests, as a result mean value be shown in Table 14,2833.6 μ ε of failure strain, it is high
Require in standard >=2500 μ ε, show that the compound of the present embodiment becomes with well opposing low temperature
The ability of shape.
14 girder bend test result of table
6) modulus properties test
Modulus properties checking is carried out using 2 points of bending complex modulus tests, 15 DEG C of test temperature, test
Frequency 10HZ.Result of the test is as shown in Table 15.From the point of view of modulus detection data, the present embodiment it is mixed
The complex modulus for closing material meets, more than the technical requirements of 9000MPa.
15 compound modulus test result of table
7) experiment on fatigue properties
Fatigue behaviour adopts French 2 points of repeated bend tests (Europe superscript test method EN12697-24),
10 DEG C of test temperature, test frequency 25Hz, 130 μ ε of strain level, result of the test such as table 16 below.
From the point of view of fatigue data, the fatigue properties of asphalt mixture of the present embodiment meets corresponding technical requirements.
16 compound fatigue test results of table
The performance verification test of material mixed above shows：The building stones level of the present embodiment asphalt with and
The asphalt for corresponding to asphalt content and being formed can meet required volume index and every road property
The requirement of energy index.
Embodiment 3
The present embodiment asphalt is mainly by the mineral aggregate of 100 mass parts, the low grade of 4.1 mass parts
Modified pitch, wherein low grade modified pitch use No. 50 SBS modified pitch of petrochina,
Mineral aggregate includes that the quality of limestone aggregates and limestone mineral powder, limestone aggregates and breeze does not account for mineral aggregate matter
The 96% and 4% of amount, limestone aggregates are divided into three groups by following three particle size range：First group：
10～15mm of particle diameter；Second group：3～5mm of particle diameter；3rd group：Particle diameter≤3mm.Above-mentioned three groups
The quality gathered materials accounts for the percentage of mineral aggregate gross mass and is followed successively by：48%th, 23%, 29%, total mineral aggregate
Effective density ρG=2.681g/cm3, its level is with such as table 17.
17 grades of table matches somebody with somebody table (method mark)
Mineral aggregate ratio, mineral effective density ρ according to the present embodimentG, provide bitumen aggregate ratio TLextAnd
The percent of pass gathered materials in table 1 calculates abundance coefficient K, and abundance coefficient K is calculated by 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-particle diameter more than gathering materials for 6.3mm accounting for total percentage for gathering materials,
S-particle diameter gathering materials between 0.25mm to 6.3mm accounts for the percentage for always gathering materials,
S-particle diameter gathering materials between 0.063mm to 0.25mm accounts for the percentage for always gathering materials,
F-particle diameter less than gathering materials for 0.063mm accounting for total percentage for gathering materials,
α-be intermediate parameters, α=2.65/ ρG。
G=100%-38.3% (6.3mm gather materials percent of pass)=61.7%, S=38.3% as known from Table 17
(6.3mm gather materials 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
Abundance coefficient K=2.58 meets K>2.55 technical requirements.
The mineral aggregate configured by above-mentioned level is put into into mixing plant, on mix was added after 10～15 seconds
No. 50 SBS modified pitch of petrochina of corresponding mass part are stated, is stirred for obtaining for 40～45 seconds pitch and is mixed
Close material.The above-mentioned asphalt for obtaining is carried out into the test of following correlated performances：
1) gyratory compaction test
Above-mentioned asphalt is made into the test specimen of Φ 150mm, and according in French relevant criterion to drip
The technical requirements of the gyratory compaction test of blue or green compound carry out gyratory compaction test, result of the test collect 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), asphalt make long 500mm,
The rut test piece of wide 180mm, high 100mm, 60 DEG C of test temperature determine load cycle-index 100,
When 300,1000,3000,10000,30000, the deformation values of 15 measurement points.According to measurement knot
Fruit calculates the corresponding rut rate of different number of run：
19 French wheel tracking test result of table
3) Chinese wheel tracking test
According to the requirement of pitch and Asphalt Mixture Experiment code (JTJ052-2000) T0719,60 ± 1
DEG C, wheel tracking test has been carried out under the conditions of 0.7 ± 0.05MPa, result of the test is shown in Table 20, from shown in the table
Result of the test can be seen that the compound of the present embodiment with good high temperature stability performance.
20 wheel tracking test dynamic stability of table
4) indirect tensile test on frozen-thaw
Requirement according to pitch and Asphalt Mixture Experiment code (JTJ052-2000) carries out real freeze thawing and splits
Test is split, striking times 50 times the results are shown in Table 21, as can be seen from the test results the present embodiment
With good water stability ability.
21 indirect tensile test on frozen-thaw result of table
5) girder bend test
Requirement according to pitch and Asphalt Mixture Experiment code (JTJ052-2000) T0715 is carried out
6 groups of -10 DEG C of low-temperature bending tests, as a result mean value be shown in Table 22,2734.0 μ ε of failure strain, it is high
Require in standard >=2500 μ ε, show that the compound of the present embodiment becomes with well opposing low temperature
The ability of shape.
22 girder bend test result of table
6) modulus properties test
Modulus properties checking is carried out using 2 points of bending complex modulus tests, 15 DEG C of test temperature, test
Frequency 10HZ.Result of the test is as shown in table 23.From the point of view of modulus detection data, the present embodiment it is mixed
The complex modulus for closing material meets, more than the technical requirements of 9000MPa.
23 compound modulus test result of table
7) experiment on fatigue properties
Fatigue behaviour adopts French 2 points of repeated bend tests (Europe superscript test method EN12697-24),
10 DEG C of test temperature, test frequency 25Hz, 130 μ ε of strain level, result of the test such as table 24 below.
From the point of view of fatigue data, the fatigue properties of asphalt mixture of the present embodiment meets corresponding technical requirements.
24 compound fatigue test results of table
The performance verification test of material mixed above shows：The building stones level of the present embodiment asphalt with and
The asphalt for corresponding to asphalt content and being formed can meet required volume index and every road property
The requirement of energy index.
Certainly, the present invention can also have other various embodiments, without departing substantially from spirit of the invention and its essence
In the case of, those of ordinary skill in the art can make various corresponding changes and change according to the present invention
Shape, but these corresponding changes and deformation should all belong to the protection domain of the claims in the present invention.
Claims (11)
1. a kind of modified pitch gap gradation asphalt, including mineral aggregate and modified pitch, it is characterised in that
The mineral aggregate by 93～96% gather materials and 4～7% breeze is constituted, the modified pitch is No. 50 SBS
Modified pitch, the asphalt Mineral Material are 100 mass parts, and the modified pitch is 4.0～4.7
Mass parts；Wherein, the lithology gathered materials is basalt or limestone, is divided into three groups according to particle diameter：First
Group is gathered materials：10～15mm；Second group is gathered materials：3～5mm；3rd group is gathered materials：≤ 3mm, described
It is 40%～66% that one group of aggregate quality accounts for the mass percent of mineral aggregate gross mass, second group of aggregate quality
The mass percent for accounting for mineral aggregate gross mass is 10%～24%, and the 3rd group of aggregate quality accounts for mineral aggregate gross mass
Mass percent be 20%～30%, and three groups of mass percents gathered materials can not be while take minimum of a value
Or maximum, three groups of quality sums gathered materials account for the 93～96% of mineral aggregate gross mass.
2. modified pitch gap gradation asphalt according to claim 1, it is characterised in that institute
State the three groups of percent of pass of formate gradation composition between sieve aperture 4mm～10mm that gather materials and be not more than 15%.
3. modified pitch gap gradation asphalt according to claim 1, it is characterised in that institute
In stating asphalt, minimum asphalt content is determined by abundance coefficient K, K>2.55.
4. modified pitch gap gradation asphalt according to claim 1, it is characterised in that institute
The compacted depth for stating asphalt is 7～16cm.
5. modified pitch gap gradation asphalt according to claim 1, it is characterised in that institute
State the voidage VV ﹤ 6% of the gyratory compaction test specimen of asphalt.
6. modified pitch gap gradation asphalt according to claim 1, it is characterised in that institute
The French wheel tracking test for stating asphalt runs rut rate≤7.5% corresponding to 30000 times.
7. modified pitch gap gradation asphalt according to claim 1, it is characterised in that institute
The dynamic stability for stating the Chinese wheel tracking test of asphalt is more than 3000 times/mm.
8. modified pitch gap gradation asphalt according to claim 1, it is characterised in that institute
Asphalt is stated in 15 DEG C of test temperature, the composite modulus E under the conditions of test frequency 10HZ>
9000MPa。
9. modified pitch gap gradation asphalt according to claim 1, it is characterised in that institute
Asphalt is stated in 10 DEG C of test temperature, test frequency 25Hz, two under the conditions of 80 μ ε of strain level
Point fatigue life number of times >=1,000,000 time.
10. modified pitch gap gradation asphalt according to claim 1, it is characterised in that institute
State asphalt Ratio of split strength TSR in indirect tensile test on frozen-thaw>80%.
11. modified pitch gap gradation asphalts according to claim 1, it is characterised in that institute
State asphalt bending failure in low temperature the small beam experiment and strain >=2500 μ ε.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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