CN105524475A - Flexible asphalt, preparation method therefor, road pavement material and road - Google Patents
Flexible asphalt, preparation method therefor, road pavement material and road Download PDFInfo
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- CN105524475A CN105524475A CN201410522291.0A CN201410522291A CN105524475A CN 105524475 A CN105524475 A CN 105524475A CN 201410522291 A CN201410522291 A CN 201410522291A CN 105524475 A CN105524475 A CN 105524475A
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Abstract
The invention discloses flexible asphalt, a preparation method therefor, a road pavement material and a road and relates to the technical field of road pavement materials. The flexible asphalt can have relatively high flexibility and stress relaxation in low-temperature and normal-temperature states, can have relatively good plastic deformation resistance in a high-temperature state and can be used for inhibiting the generation of reflection cracks in asphalt-plus-concrete pavement constructions. The flexible asphalt disclosed by the invention contains 4-9 parts (by mass) of matrix asphalt, 1-6 parts (by mass) of aromatic hydrocarbon oil, sulfur, of which the mass is 0.01-1% the total mass of the matrix asphalt and aromatic hydrocarbon oil, copper oxide, of which the mass is 0.01-1% the total mass of the matrix asphalt and aromatic hydrocarbon oil, an anti-stripping agent, of which the mass is 0.01-1.5% the total mass of the matrix asphalt and aromatic hydrocarbon oil, and a butadiene-styrene block copolymer, of which the mass is 4-12% the total mass of the matrix asphalt and aromatic hydrocarbon oil. The flexible asphalt disclosed by the invention is applicable to a reforming process for cement concrete pavements.
Description
Technical field
The present invention relates to road pavement field of material technology, particularly relate to a kind of flexible pitch and preparation method thereof, road pavement material and road.
Background technology
During China's town road is built, cement concrete pavement is owing to having good anti-load, shock resistance, and raw material resources enriches, relatively at present bituminous pavement, and cost comparatively economic dispatch feature is widely used in road engineering.
But along with the improvement of national economy, motor vehicle flow is increasing, the shortcoming of cement concrete pavement is also day by day obvious, as: road surface slippery situation, salt tolerant erosion with freeze thawing is poor, noise and jolting causes that comfort is low, inconvenient maintenance etc.Therefore, on concrete road surface, Laying Asphalt Surface Course (" in vain " that namely we often say adds " black " road surface) engineering is increasing, improves the resiliency of road, erosion resistance and freeze thawing to a certain extent.But, because motor vehicle flow is excessive, in this road surface, often can there is the diseases such as the reflection crack caused because of cement concrete expansion joint, cause pavement damage.
Summary of the invention
Main purpose of the present invention is, a kind of flexible pitch and preparation method thereof, road pavement material and road are provided, this flexible pitch can have higher flexibility and stress retentivity, can have good viscous deformation resistivity at high operating temperatures under low temperature and normal temperature state, further, the generation in this flexible pitch energy inhibitory reflex crack in asphalt plus concrete road engineering.
For achieving the above object, the present invention adopts following technical scheme:
On the one hand, the invention provides a kind of flexible pitch, comprising:
The matrix pitch of 4 ~ 9 mass parts, the aromatic hydrocarbon oil of 1 ~ 6 mass parts;
Account for the sulphur of 0.01 ~ 1% of described matrix pitch and described aromatic hydrocarbon oil quality sum;
Account for the cupric oxide of 0.01 ~ 1% of described matrix pitch and described aromatic hydrocarbon oil quality sum;
Account for the antistripping agent of 0.01 ~ 1.5% of described matrix pitch and described aromatic hydrocarbon oil quality sum;
Account for the butadiene-styrene block copolymer of 4 ~ 12% of described matrix pitch and described aromatic hydrocarbon oil quality sum.
Alternatively, described matrix pitch is 6 ~ 8 mass parts, and described aromatic hydrocarbon oil is 2 ~ 4 mass parts;
Described sulphur accounts for 0.1 ~ 0.2% of described matrix pitch and described aromatic hydrocarbon oil quality sum;
Described cupric oxide accounts for 0.1 ~ 0.2% of described matrix pitch and described aromatic hydrocarbon oil quality sum;
Described antistripping agent accounts for 0.3 ~ 0.6% of described matrix pitch and described aromatic hydrocarbon oil quality sum;
Described butadiene-styrene block copolymer accounts for 6 ~ 10% of described matrix pitch and described aromatic hydrocarbon oil quality sum.
Preferably, described matrix pitch is 7 mass parts, and described aromatic hydrocarbon oil is 3 mass parts;
Described sulphur accounts for 0.15% of described matrix pitch and described aromatic hydrocarbon oil quality sum;
Described cupric oxide accounts for 0.15% of described matrix pitch and described aromatic hydrocarbon oil quality sum;
Described antistripping agent accounts for 0.4% of described matrix pitch and described aromatic hydrocarbon oil quality sum;
Described butadiene-styrene block copolymer accounts for 7.5% of described matrix pitch and described aromatic hydrocarbon oil quality sum.
Particularly, described antistripping agent is tensio-active agent.
Correspondingly, embodiments provide a kind of preparation method of flexible pitch, comprising:
The matrix pitch of 4 ~ 9 mass parts is heated to 140 ~ 180 DEG C, then adds the aromatic hydrocarbon oil of 1 ~ 6 mass parts, mix;
Add again account for described matrix pitch and described aromatic hydrocarbon oil quality sum 0.01 ~ 1% sulphur, account for 0.01 ~ 1wt% of described matrix pitch and described aromatic hydrocarbon oil quality sum cupric oxide, account for described matrix pitch and described aromatic hydrocarbon oil quality sum 0.01 ~ 1.5% antistripping agent and account for described matrix pitch and described aromatic hydrocarbon oil quality sum 4 ~ 12% butadiene-styrene block copolymer, high speed shear is ground.
On the other hand, present invention also offers a kind of road pavement material, comprise the flexible pitch that above-mentioned arbitrary technical scheme provides, and described flexible pitch is as binding agent, mixes with graded broken stone, fine sand and breeze, define described road pavement material.
Correspondingly, present invention also offers a kind of road, comprising:
Roadbed; With
The road pavement material provided as above-mentioned arbitrary technical scheme as described in roadbed to be mated formation the flexible brea bed formed.
Particularly, described flexible brea bed comprises the flexible brea bed in middle level and the flexible brea bed of surface layer;
Mat formation successively on described roadbed and have the first emulsified bitumen layer, the flexible brea bed of described middle level flexible brea bed, the second emulsified bitumen layer and described surface layer.
Preferably, the thickness of the flexible brea bed in described middle level is 4 ~ 6cm; The thickness of the flexible brea bed of described surface layer is 3 ~ 5cm.
Flexible pitch that the embodiment of the present invention provides and preparation method thereof, road pavement material and road, wherein, matrix pitch and aromatic hydrocarbon oil have good consistency, and aromatic hydrocarbon oil has the features such as high temperature resistant, low volatilization, thus significantly improve weathering resistance, the oxidation-resistance of matrix pitch, and mixing and the dispersion of the additives such as sulphur in matrix pitch, cupric oxide, antistripping agent can also be helped; The interpolation of sulphur, improves the adhesivity of matrix pitch, plasticity-, thermostability, physical strength and winter hardiness effectively; The interpolation of cupric oxide, as organic reaction catalyzer, improves the storage time of product effectively; The interpolation of antistripping agent, during low temperature, improves the ability of the resistance to deformation of matrix pitch, improves the viscous deformation resistivity of matrix pitch during high temperature; Butadiene-styrene block copolymer can form space multistory network structure with matrix pitch, effectively improves the stability, ageing resistance etc. of the high temperature performance of matrix pitch and temperature-sensitive performance, tensile property, elasticity, compound.
Comprehensively above-mentioned, in the embodiment of the present invention, by adding aromatic hydrocarbon oil in matrix pitch, and the additive such as sulphur, cupric oxide, antistripping agent and SBS, further, each component and content thereof cooperatively interact, mutually work in coordination with, and make the flexible pitch prepared have following excellent advantages:
1) brittleness temperature is low, during low temperature, still can keep good elasticity;
2) good stress there is very high low-temperature ductility, even if also still can be kept to relax ability in low temperature region;
3) have higher penetration degree and penetrative index, when low temperature, resistivity during high-speed deformation is strong, namely has distortion tracing ability;
4) there is high softening-point, high viscosity, so there is good resistance to mobility, i.e. viscous deformation resistivity, under time in this flexible asphalt applications to asphalt plus concrete road engineering can be played high-temperature condition, suppress the effect of rut.
That is, the flexible pitch that the embodiment of the present invention provides can have higher flexibility and stress retentivity, can have good viscous deformation resistivity at high operating temperatures under low temperature and normal temperature state, therefore, this flexible pitch can the generation in inhibitory reflex crack in asphalt plus concrete road engineering.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The pliability test test result of a kind of road pavement material that Fig. 1 provides for the embodiment of the present invention;
The amount of bow test-results of a kind of road pavement material that Fig. 2 provides for the embodiment of the present invention;
The through test-results in crack of a kind of road pavement material that Fig. 3 provides for the embodiment of the present invention;
The construction process schema of a kind of road that Fig. 4 provides for the embodiment of the present invention;
Fig. 5 is the section structure schematic diagram of the road formed in Fig. 4;
Fig. 6 is the road that crack has appearred in prior art;
The road that Fig. 7 is formed for the road pavement material laying the embodiment of the present invention 6 on the road surface shown in Fig. 6.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiments provide a kind of flexible pitch, comprising: the matrix pitch of 4 ~ 9 mass parts, the aromatic hydrocarbon oil of 1 ~ 6 mass parts;
Account for the sulphur of 0.01 ~ 1% of matrix pitch and aromatic hydrocarbon oil quality sum;
Account for the cupric oxide of 0.01 ~ 1% of matrix pitch and aromatic hydrocarbon oil quality sum;
Account for the antistripping agent of 0.01 ~ 1.5% of matrix pitch and aromatic hydrocarbon oil quality sum;
Account for the butadiene-styrene block copolymer (SBS) of 4 ~ 12% of matrix pitch and aromatic hydrocarbon oil quality sum.
The flexible pitch that the embodiment of the present invention provides, wherein, matrix pitch and aromatic hydrocarbon oil have good consistency, and aromatic hydrocarbon oil has the features such as high temperature resistant, low volatilization, thus significantly improve weathering resistance, the oxidation-resistance of matrix pitch, and mixing and the dispersion of the additives such as sulphur in matrix pitch, cupric oxide, antistripping agent can also be helped; The interpolation of sulphur, improves the adhesivity of matrix pitch, plasticity-, thermostability, physical strength and winter hardiness effectively; The interpolation of cupric oxide, as organic reaction catalyzer, and improves the storage time of product effectively; The interpolation of antistripping agent, during low temperature, improves the ability of the resistance to deformation of matrix pitch, improves the viscous deformation resistivity of matrix pitch during high temperature; SBS can form space multistory network structure with matrix pitch, effectively improves the stability, ageing resistance etc. of the high temperature performance of matrix pitch and temperature-sensitive performance, tensile property, elasticity, compound.
That is, in the embodiment of the present invention, by adding aromatic hydrocarbon oil in matrix pitch, and the additive such as sulphur, cupric oxide, antistripping agent and SBS, further, each component and content thereof cooperatively interact, mutually work in coordination with, and make prepared flexible pitch can have higher flexibility and stress retentivity under low temperature and normal temperature state, can have good viscous deformation resistivity at high operating temperatures, therefore, this flexible pitch can the generation in inhibitory reflex crack in asphalt plus concrete road engineering.
Alternatively, in the flexible pitch that provides of the embodiment of the present invention, each component concentration can be further:
Matrix pitch is 5 ~ 9 mass parts, and aromatic hydrocarbon oil is 1 ~ 5 mass parts;
Sulphur accounts for 0.01 ~ 0.5% of matrix pitch and aromatic hydrocarbon oil quality sum;
Cupric oxide accounts for 0.01 ~ 0.5% of matrix pitch and aromatic hydrocarbon oil quality sum;
Antistripping agent accounts for 0.01 ~ 1.2% of matrix pitch and aromatic hydrocarbon oil quality sum;
SBS accounts for 5 ~ 11% of matrix pitch and aromatic hydrocarbon oil quality sum.
Preferably, in flexible pitch, each component concentration can be:
Matrix pitch is 5 ~ 8 mass parts, and aromatic hydrocarbon oil is 2 ~ 5 mass parts;
Sulphur accounts for 0.01 ~ 0.3% of matrix pitch and aromatic hydrocarbon oil quality sum;
Cupric oxide accounts for 0.01 ~ 0.3% of matrix pitch and aromatic hydrocarbon oil quality sum;
Antistripping agent accounts for 0.03 ~ 1% of matrix pitch and aromatic hydrocarbon oil quality sum;
SBS accounts for 5 ~ 10% of matrix pitch and aromatic hydrocarbon oil quality sum.
Further preferably, in flexible pitch, each component concentration can be:
Matrix pitch is 6 ~ 8 mass parts, and aromatic hydrocarbon oil is 2 ~ 4 mass parts;
Sulphur accounts for 0.1 ~ 0.2% of matrix pitch and aromatic hydrocarbon oil quality sum;
Cupric oxide accounts for 0.1 ~ 0.2% of matrix pitch and aromatic hydrocarbon oil quality sum;
Antistripping agent accounts for 0.3 ~ 0.6% of matrix pitch and aromatic hydrocarbon oil quality sum;
SBS accounts for 6 ~ 10% of matrix pitch and aromatic hydrocarbon oil quality sum.
Most preferably, in flexible pitch, each component concentration can be:
Matrix pitch is 7 mass parts, and aromatic hydrocarbon oil is 3 mass parts;
Sulphur accounts for 0.15% of matrix pitch and aromatic hydrocarbon oil quality sum;
Cupric oxide accounts for 0.15% of matrix pitch and aromatic hydrocarbon oil quality sum;
Antistripping agent accounts for 0.4% of matrix pitch and aromatic hydrocarbon oil quality sum;
SBS accounts for 7.5% of matrix pitch and aromatic hydrocarbon oil quality sum.
It should be noted that, the embodiment of the present invention mainly explores each component and content thereof in flexible pitch and, on the impact of flexible asphalt performance, finding, by continuing to optimize the content of each component, the performance of flexible pitch can be made constantly to improve.Therefore, each formula of the above-mentioned flexible pitch provided is optimized successively, and correspondingly flexible asphalt performance also improves successively.
In the embodiment of the present invention, use each composition all can be obtained by commercially available mode.Particularly, the matrix pitch used is for oil is through exploitation, refining processing and the pitch that obtains or be tar-bitumen, such as coal-tar pitch, and wood pitch etc., the present invention's contrast is not construed as limiting.
The relative density 0.9529 ~ 1.0188 of the aromatic hydrocarbon oil used, zero pour <5 DEG C, specific refractory power 1.5700 ~ 1.5800, viscosity (60 DEG C) 12--15 ° E, flash-point (opening cup) 170 ~ 200 DEG C, aniline point about 36 DEG C, aromatic hydrocarbon content 70% ~ 87%, saturated hydrocarbon content 20% ~ 35%, polarity thing content <25%, asphaltene hydrocarbon content <0.5%.
The antistripping agent used improves asphalt adhesion, weather resistance and thermostability, also improves the high-temperature stability of compound in addition, improves water stability and the weather resistance of compound; Particularly, this antistripping agent can be filamentary structure, such as natural fiber, man-made fiber etc., also can be tensio-active agent, such as nonionic surface active agent.
The SBS used can be hub-and-spoke configuration, and its average molecular mass can be 140,000 ~ 300,000, and relative density can be 0.92 ~ 0.95.
Correspondingly, present invention also offers a kind of preparation method of flexible pitch, specifically can comprise:
The matrix pitch of 4 ~ 9 mass parts is heated to 140 ~ 180 DEG C, then adds the aromatic hydrocarbon oil of 1 ~ 6 mass parts, mix;
Add again account for matrix pitch and aromatic hydrocarbon oil quality sum 0.01 ~ 1% sulphur, account for matrix pitch and aromatic hydrocarbon oil quality sum 0.01 ~ 1% cupric oxide, account for matrix pitch and aromatic hydrocarbon oil quality sum 0.01 ~ 1.5% antistripping agent and account for matrix pitch and aromatic hydrocarbon oil quality sum 4 ~ 12% butadiene-styrene block copolymer, high speed shear is ground, thus obtains flexible pitch.
The preparation method of the flexible pitch that the embodiment of the present invention provides, wherein, matrix pitch and aromatic hydrocarbon oil have good consistency, and aromatic hydrocarbon oil has the features such as high temperature resistant, low volatilization, thus significantly improve weathering resistance, the oxidation-resistance of matrix pitch, and mixing and the dispersion of the additives such as sulphur in matrix pitch, cupric oxide, antistripping agent can also be helped; The interpolation of sulphur, improves the adhesivity of matrix pitch, plasticity-, thermostability, physical strength and winter hardiness effectively; The interpolation of cupric oxide, the interpolation of cupric oxide, as organic reaction catalyzer, improves the storage time of product effectively; The interpolation of antistripping agent, during low temperature, improves the ability of the resistance to deformation of matrix pitch, improves the viscous deformation resistivity of matrix pitch during high temperature; SBS can form space multistory network structure with matrix pitch, effectively improves the stability, ageing resistance etc. of the high temperature performance of matrix pitch and temperature-sensitive performance, tensile property, elasticity, compound.
Comprehensively above-mentioned, in the embodiment of the present invention, by adding aromatic hydrocarbon oil in matrix pitch, and the additive such as sulphur, cupric oxide, antistripping agent and SBS, further, each component and content thereof cooperatively interact, mutually work in coordination with, and make the flexible pitch prepared have following excellent advantages:
1) brittleness temperature is low, during low temperature, still can keep good elasticity;
2) good stress there is very high low-temperature ductility, even if also still can be kept to relax ability in low temperature region;
3) have higher penetration degree and penetrative index, when low temperature, resistivity during high-speed deformation is strong, namely has distortion tracing ability;
4) there is high softening-point, high viscosity, so there is good resistance to mobility, i.e. viscous deformation resistivity, under time in this flexible asphalt applications to asphalt plus concrete road engineering can be played high-temperature condition, suppress the effect of rut.
That is, the flexible pitch that the embodiment of the present invention provides can have higher flexibility and stress retentivity, can have good viscous deformation resistivity at high operating temperatures under low temperature and normal temperature state, therefore, this flexible pitch can the generation in inhibitory reflex crack in asphalt plus concrete road engineering.
Particularly, in aforesaid method, be input in stirred pot after matrix pitch can being heated to 140 ~ 180 DEG C, adding aromatic hydrocarbon oil is again stirred to evenly, add sulphur, cupric oxide, antistripping agent, SBS afterwards, the grinding of mixing high speed shear, thus obtain flexible pitch.
Particularly, matrix pitch can be heated to 140 DEG C, 150 DEG C, 160 DEG C, 170 DEG C or 180 DEG C etc.
It should be noted that, the preparation method of the flexible pitch that the embodiment of the present invention provides can prepare the flexible pitch of above-mentioned any one, and therefore the method has identical or corresponding technical characteristic with flexible pitch, can reach identical technique effect, therefore, at this, it is no longer repeated in the present invention.
On the other hand, the embodiment of the present invention additionally provides a kind of road pavement material, wherein, this road pavement material comprises the flexible pitch of any one that the embodiment of the present invention provides, and this flexible pitch is as binding agent, mix with graded broken stone, fine sand and breeze, define described road pavement material.
The road pavement material that the embodiment of the present invention provides, take full advantage of higher flexibility that flexible pitch has under low temperature and normal temperature state and stress retentivity, the good viscous deformation resistivity that has at high operating temperatures characteristic, thus, this road pavement material can keep good stress to relax ability and elasticity in low temperature region, namely there is good distortion tracing ability, occur to suppress stress crack; Good viscous deformation resistivity can be had, to suppress the generation of rut problem in high temperature region.
Preferably, in road pavement material, the mass ratio of flexible pitch and aggregate can be 6:100; Wherein, aggregate can comprise graded broken stone, fine sand and breeze; Particularly, graded broken stone can comprise No. 6 rubbles, No. 7 rubbles and SC, and wherein, the mass percent of the mass percent of No. 6 rubbles can be the mass percent of 68%, No. 7 rubbles can be 5.5%, SC can be 12%; The mass percent of fine sand is 4.5%; The mass percent of breeze is 10%.
It should be noted that, in the embodiment of the present invention, the graded broken stone used, fine sand, breeze all directly can be obtained by commercially available mode.Particularly, the graded broken stone median size used can decide according to the maximum particle diameter size needed for Pavement Structure Design; Wherein, the standard series dimension crushed stone of SC for gathering materials in " standard specification for construction and acceptance of highway asphalt pavement " JTGF40-2004, it and No. 6 rubbles, No. 7 rubbles are all the general graded broken stone type selectings of bituminous mixing plant mix asphalt, belong to the rubble of different-grain diameter well-known to those skilled in the art, in a word, as long as SC, No. 6 rubbles and No. 7 rubbles can be prepared burden skilled artisan the graded broken stone commonly used, the present invention is not construed as limiting this.
The particle that the fine sand used is greater than 0.075mm for particle diameter exceedes full weight 85%, fineness modulus is the sand of 2.2 ~ 1.6.
The powder of the breeze used for obtaining after ore grinding.
The road pavement material that the embodiment of the present invention provides, when being applied to Concrete Overlays brea bed section, can the generation in inhibitory reflex crack; When being applied to cold zone road, effectively can delaying or suppressing pitch low-temperature cracks.
Correspondingly, the embodiment of the present invention additionally provides a kind of road, and employ above-mentioned any one road pavement material, this road comprises:
Roadbed; With
Any one road pavement material that the embodiment of the present invention provides mat formation on described roadbed formed flexible brea bed.
The road that the embodiment of the present invention provides, take full advantage of higher flexibility that flexible pitch has under low temperature and normal temperature state and stress retentivity, the good viscous deformation resistivity that has at high operating temperatures characteristic, thus, this flexible pitch, in Concrete Overlays brea bed engineering, restrained effectively the generation of reflection crack and rut and inhibits the generation of low-temperature cracks at cold zone.
Alternatively, the flexible brea bed in this road can comprise the flexible brea bed in middle level and the flexible brea bed of surface layer;
Particularly, mat formation successively on roadbed and have the first emulsified bitumen layer, the flexible brea bed of middle level flexible brea bed, the second emulsified bitumen layer and surface layer.
Wherein, the thickness of the flexible brea bed in middle level is 4 ~ 6cm, such as 4cm, 5cm or 6cm; The thickness of the flexible brea bed of surface layer is 3 ~ 5cm such as 3cm, 4cm or 5cm.Flexible asphalt thickness design, also need with reference to graded broken stone nominal maximum aggregate size---namely minimum thickness must be greater than 2.5 times of graded broken stone nominal particle diameter maximum value.
In prior art, in order to increase the shock-absorbing capacity on road surface, in way of concrete foundations during repaving asphalt coat, need first in way of concrete foundations overlay stress absorbing layer re-lay brea bed, or need to increase pavement thickness, or the method such as service stress grid, complex procedures, the duration and cost higher.
And the road that the embodiment of the present invention provides, the first emulsified bitumen layer, the flexible brea bed of middle level flexible brea bed, the second emulsified bitumen layer and surface layer directly can be overlayed in way of concrete foundations, because the flexible brea bed in middle level and the flexible brea bed of surface layer have had enough shock-absorbing capacities, thus do not need additionally to lay stress absorbing layer, do not need to increase pavement thickness or service stress grid yet, thus effectively save duration and construction cost, there is very high economic and social benefit.
To be described in further detail flexible pitch provided by the invention and preparation method thereof, road pavement material and road by specific embodiment below.
Flexible pitch
Comparative example 1
Be input in stirred pot after matrix pitch being heated to 160 DEG C, then add the SBS accounting for matrix pitch 7.5% and be stirred to evenly, the grinding of mixing high speed shear, thus obtain SBS modifying asphalt.
Embodiment 1
Be input in stirred pot after the matrix pitch of 7 mass parts is heated to 160 DEG C, then the aromatic hydrocarbon oil adding 3 mass parts is stirred to evenly, matrix pitch and aromatic hydrocarbon oil quality sum are designated as W; Then add the sulphur of W × 0.15%, the SBS of the cupric oxide of W × 0.15% and the antistripping agent of W × 0.4%, W × 7.5%, fully mixes, and high speed shear is ground, and obtains flexible pitch.
Embodiment 2
Be input in stirred pot after the matrix pitch of 4 mass parts is heated to 160 DEG C, then the aromatic hydrocarbon oil adding 6 mass parts is stirred to evenly, matrix pitch and aromatic hydrocarbon oil quality sum are designated as W; Then add the sulphur of W × 0.01%, the SBS of the cupric oxide of W × 1% and the antistripping agent of W × 0.01%, W × 4%, fully mixes, and high speed shear is ground, and obtains flexible pitch.
Embodiment 3
Be input in stirred pot after the matrix pitch of 9 mass parts is heated to 160 DEG C, then the aromatic hydrocarbon oil adding 1 mass parts is stirred to evenly, matrix pitch and aromatic hydrocarbon oil quality sum are designated as W; Then add the sulphur of W × 1%, the SBS of the cupric oxide of W × 0.01% and the antistripping agent of W × 1.5%, W × 12%, fully mixes, and high speed shear is ground, and obtains flexible pitch.
Embodiment 4
Be input in stirred pot after the matrix pitch of 6 mass parts is heated to 160 DEG C, then the aromatic hydrocarbon oil adding 4 mass parts is stirred to evenly, matrix pitch and aromatic hydrocarbon oil quality sum are designated as W; Then add the sulphur of W × 0.5%, the SBS of the cupric oxide of W × 0.5% and the antistripping agent of W × 0.8%, W × 10%, fully mixes, and high speed shear is ground, and obtains flexible pitch.
Embodiment 5
Be input in stirred pot after the matrix pitch of 8 mass parts is heated to 160 DEG C, then the aromatic hydrocarbon oil adding 2 mass parts is stirred to evenly, matrix pitch and aromatic hydrocarbon oil quality sum are designated as W; Then add the sulphur of W × 0.15%, the SBS of the cupric oxide of W × 0.15% and the antistripping agent of W × 0.4%, W × 10%, fully mixes, and high speed shear is ground, and obtains flexible pitch.
Performance test
Flexible pitch prepared by the SBS modifying asphalt prepared for plain asphalt, comparative example 1 and embodiment 1 ~ 5 carries out performance test, and, each test event all adopts method well-known to those skilled in the art to test, and therefore, the present invention is not described in detail each testing method.
Test result is in table 1:
Table 1
As shown in Table 1, plain asphalt 70#, 90# of using in the prior art that compares, and the SBS modifying asphalt of comparative example, flexible asphalt embrittle point prepared by the embodiment of the present invention 1 ~ 5 is lower, therefore, during low temperature, still can keep good elasticity; And there is very high low-temperature ductility, therefore, good stress still can be kept to relax ability in low temperature region.
Further, flexible pitch prepared by the embodiment of the present invention 1,2,4 and 5 has higher penetration degree and penetrative index, and when low temperature, resistivity during high-speed deformation is comparatively strong, namely has distortion tracing ability; Flexible pitch prepared by the embodiment of the present invention 1,3 and 5 has higher softening temperature, higher viscosity, and therefore this flexible pitch has good resistance to mobility, i.e. viscous deformation resistivity suppresses the effect of rut under playing high-temperature condition.
This shows, by adjusting the content of each component in flexible pitch, effectively can adjust the performance of flexible pitch.But in scope disclosed by the invention, prepared flexible pitch has following properties on the whole:
1) brittleness temperature is lower, therefore, during low temperature, still can keep good elasticity;
2) there is very high low-temperature ductility, therefore, good stress still can be kept in low temperature region to relax ability;
3) have higher penetration degree and penetrative index, when low temperature, resistivity during high-speed deformation is strong, namely has distortion tracing ability;
4) there is high softening-point, high viscosity, so there is good resistance to mobility, i.e. viscous deformation resistivity, under playing high-temperature condition, suppress the effect of rut.
Road pavement material
Choose flexible pitch prepared by plain asphalt 60/80, the SBS modifying asphalt of above-mentioned comparative example 1 and embodiment 1 respectively as binding agent, and make road pavement material with the aggregate such as graded broken stone, fine sand and breeze respectively, and carry out performance test.Wherein, in each comparative example and embodiment in road pavement material each component concentration in table 2:
Table 2
Performance test
Carry out performance test for above-mentioned different kinds of roads pavement material, wherein, each performance test project all adopts method well-known to those skilled in the art to test, and therefore, the present invention is not described in detail each testing method.
1, fundamental property test result, as shown in table 3:
Table 3
| Test event | Comparative example 2 | Comparative example 3 | Embodiment 6 |
| Stability (KN) | 9.23 | 11.08 | 11.15 |
| Voidage (%) | 2.6 | 2.3 | 2.2 |
| Dynamic stability (returning/mm) | 1200 | 3150 | 3,300 |
| Coefficient of permeability (cm/sec) | 1×10 -7Below | 1×10 -7Below | 1×10 -7Below |
2, fatigue resistance, durability performance test, wherein, use pliability test to test this performance, pliability test condition is as shown in table 4:
Table 4
| Sample size | 40×40×400(mm) |
| Test temperature | 5℃ |
| Control method | Controlling distortion 700 (μ) |
| Load enters Reeb shape | Sinusoidal wave |
| Cycle | 5(Hz) |
| Bearing method | 2 support 2 point loads |
As shown in Figure 1, as shown in Figure 1, the destruction revolution of the road pavement material of embodiment 6 is 13 times of comparative example 3 to the pliability test test result of different kinds of roads pavement material, is 85 times of comparative example 2.This shows, the flexible pitch that the embodiment of the present invention provides has good fatigue resistance and weather resistance.
3, amount of bow test
As shown in Figure 2, as shown in Figure 2: the deflection of the road pavement material of embodiment 6 is higher than the deflection of the road pavement material of comparative example 3, and this shows, the flexible pitch that the embodiment of the present invention provides has and is better out of shape tracing ability amount of bow test-results.
4, the through test in crack
The through test in crack have references to application vehicle tracking test instrument and carries out, and concrete test conditions is as shown in table 5:
Table 5
| Sample size | (wide) 80 × (length), 300 × (height) 20 (mm) |
| Test temperature | 25℃ |
| Number is returned in test wheel roll extrusion | 42 (times/min) |
| Test wheel loading | 110(kg) |
| Lower rubber pad hardness | 30 (JIS hardness) t=50 (mm) |
| Bearing method | 2 support 2 point loads |
As shown in Figure 3, cutting through time needed for the road pavement material of embodiment 6 is about 1.5 times of comparative example 3 to test-results, is about 2.5 times of comparative example 2.This shows, the flexible pitch that the embodiment of the present invention provides has good reflection crack inhibition.
Road
The road pavement materials application provided by above-described embodiment 6, in cement concrete improvement project, namely lays the road pavement material that above-described embodiment 6 provides, to improve pavement behavior on the cement concrete pavement in crack.
Construction process is as shown in Figure 4, shown in the road formed and Fig. 5, specific as follows:
S1, preparation work;
S2, plucking 1 ~ 2cm is carried out to cement concrete roadbed 11;
S3, roadbed 11 is repaired, the ditch well adjustment pitch cementation of fissures, with the gap place filled bitumen 12 at roadbed 11;
S4, on above-mentioned roadbed 11, carry out emulsified bitumen spreading again, to form the first emulsified bitumen layer 14;
S5, then expansion joint place lay geotextile 13;
S6, road pavement material embodiment 6 provided pave on the first emulsified bitumen layer 14, to form the flexible brea bed 15 in face in 4cm thickness;
S7, carry out emulsified bitumen distribution again, to form the second emulsified bitumen layer 16;
S8, road pavement material embodiment 6 provided pave on the second emulsified bitumen layer 16, with the flexible brea bed 17 of the surface layer forming 3cm thickness.
It should be noted that, use production and the job specifications requirement of the flexible asphalt concrete of the embodiment of the present invention, all by the corresponding code requirement of SBS modifying asphalt concrete, the design of its bitumen aggregate ratio is pressed asphalt concrete bitumen aggregate ratio design specifications and is performed.Effect comparison before and after construction as shown in Figure 6,7.Road shown in Fig. 7 has been completed 2 years, and road surface does not occur crack, in good condition.
In sum, show from test and practical construction experience, the flexible pitch that the embodiment of the present invention provides, in Concrete Overlays brea bed engineering, restrained effectively the generation of reflection crack, advises applying in this type of pavement engineering.Meanwhile, compared with laying absorption of stress layer process with prior art, the road that the embodiment of the present invention provides does not need to arrange stress absorbing layer, saves duration and cost, has good economic benefit and social benefit.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (9)
1. a flexible pitch, is characterized in that, comprising:
The matrix pitch of 4 ~ 9 mass parts, the aromatic hydrocarbon oil of 1 ~ 6 mass parts;
Account for the sulphur of 0.01 ~ 1% of described matrix pitch and described aromatic hydrocarbon oil quality sum;
Account for the cupric oxide of 0.01 ~ 1% of described matrix pitch and described aromatic hydrocarbon oil quality sum;
Account for the antistripping agent of 0.01 ~ 1.5% of described matrix pitch and described aromatic hydrocarbon oil quality sum;
Account for the butadiene-styrene block copolymer of 4 ~ 12% of described matrix pitch and described aromatic hydrocarbon oil quality sum.
2. flexible pitch according to claim 1, is characterized in that, described matrix pitch is 6 ~ 8 mass parts, and described aromatic hydrocarbon oil is 2 ~ 4 mass parts;
Described sulphur accounts for 0.1 ~ 0.2% of described matrix pitch and described aromatic hydrocarbon oil quality sum;
Described cupric oxide accounts for 0.1 ~ 0.2% of described matrix pitch and described aromatic hydrocarbon oil quality sum;
Described antistripping agent accounts for 0.3 ~ 0.6% of described matrix pitch and described aromatic hydrocarbon oil quality sum;
Described butadiene-styrene block copolymer accounts for 6 ~ 10% of described matrix pitch and described aromatic hydrocarbon oil quality sum.
3. flexible pitch according to claim 2, is characterized in that, described matrix pitch is 7 mass parts, and described aromatic hydrocarbon oil is 3 mass parts;
Described sulphur accounts for 0.15% of described matrix pitch and described aromatic hydrocarbon oil quality sum;
Described cupric oxide accounts for 0.15% of described matrix pitch and described aromatic hydrocarbon oil quality sum;
Described antistripping agent accounts for 0.4% of described matrix pitch and described aromatic hydrocarbon oil quality sum;
Described butadiene-styrene block copolymer accounts for 7.5% of described matrix pitch and described aromatic hydrocarbon oil quality sum.
4. the flexible pitch according to any one of claims 1 to 3, is characterized in that, described antistripping agent is tensio-active agent.
5. a preparation method for flexible pitch, is characterized in that, comprising:
The matrix pitch of 4 ~ 9 mass parts is heated to 140 ~ 180 DEG C, then adds the aromatic hydrocarbon oil of 1 ~ 6 mass parts, mix;
Add again account for described matrix pitch and described aromatic hydrocarbon oil quality sum 0.01 ~ 1% sulphur, account for 0.01 ~ 1wt% of described matrix pitch and described aromatic hydrocarbon oil quality sum cupric oxide, account for described matrix pitch and described aromatic hydrocarbon oil quality sum 0.01 ~ 1.5% antistripping agent and account for described matrix pitch and described aromatic hydrocarbon oil quality sum 4 ~ 12% butadiene-styrene block copolymer, high speed shear is ground.
6. a road pavement material, is characterized in that, comprises the flexible pitch described in any one of Claims 1 to 4, and described flexible pitch is as binding agent, mixes with graded broken stone, fine sand and breeze, defines described road pavement material.
7. a road, is characterized in that, comprising:
Roadbed; With
Road pavement material as claimed in claim 6 mat formation on described roadbed formed flexible brea bed.
8. road according to claim 7, is characterized in that,
Described flexible brea bed comprises the flexible brea bed in middle level and the flexible brea bed of surface layer;
Mat formation successively on described roadbed and have the first emulsified bitumen layer, the flexible brea bed of described middle level flexible brea bed, the second emulsified bitumen layer and described surface layer.
9. road according to claim 8, is characterized in that, the thickness of the flexible brea bed in described middle level is 4 ~ 6cm; The thickness of the flexible brea bed of described surface layer is 3 ~ 5cm.
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