CN212077524U - Easily-compacted in-place heat regeneration pavement structure with high-toughness ultrathin wearing layer - Google Patents
Easily-compacted in-place heat regeneration pavement structure with high-toughness ultrathin wearing layer Download PDFInfo
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- CN212077524U CN212077524U CN201922169817.2U CN201922169817U CN212077524U CN 212077524 U CN212077524 U CN 212077524U CN 201922169817 U CN201922169817 U CN 201922169817U CN 212077524 U CN212077524 U CN 212077524U
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Abstract
The utility model discloses an easy closely knit hot in-place recycling road surface structure with ultra-thin wearing layer of high tenacity, including the ultra-thin pitch wearing layer of high tenacity, SBS modified emulsified asphalt tie coat, mix hot in-place recycling asphalt pavement layer, original asphalt concrete pavement structure layer of amine surfactant agent that top-down set up. The utility model discloses through mix amine surfactant active in the process of remixing, can make hot in-place regeneration mixture more easily compact, and can reduce compaction temperature 20 ℃, and amino can improve the adhesion of pitch and aggregate simultaneously, can make freeze thawing splitting strength than improving to 90%, thereby improve the water stability of mixture; in addition, a high-toughness ultrathin asphalt wearing layer with density gradation of 8-15 mm is added on the surface of the hot-recycling asphalt pavement, so that the water permeability resistance, the driving comfort and the uniformity of gradation of the surface layer of the pavement are greatly improved, and the quality of the in-situ hot-recycling asphalt pavement is greatly improved.
Description
Technical Field
The utility model relates to a highway construction technical field especially relates to an easily closely knit hot in-place recycling road surface structure with ultra-thin wearing layer of high tenacity.
Background
With the continuous development of road construction and the increasing progress of vehicles, the task of road pavement maintenance is heavier and heavier. The hot in-place recycling treatment of the asphalt pavement is a recycling process which utilizes an asphalt pavement hot recycling machine set to heat and loosen the original pavement, adds a recycling agent and new aggregates, and then carries out remixing, drying, spreading, leveling and compacting. The advancement is that the original pavement material can be utilized by 100 percent. Therefore, in recent years, in-situ thermal regeneration has been used as a surface function recovery type curing technique.
In the current in-situ heat regeneration technology, the grading of the old asphalt mixture is unstable due to the factors such as mixture segregation and pavement diseases (ruts, pits and the like), so that the grading of the in-situ heat regeneration pavement is unstable, the high-temperature performance is insufficient when the pavement is too thin, the water seepage on the pavement is serious when the pavement is too thick, and the water stability is insufficient. In addition, it is difficult to ensure the degree of compaction because the temperature segregation caused by the difficulty in completely uniform heating of the apparatus makes the compaction difficult. Therefore, in-situ thermal regeneration has been difficult to widely spread on high-grade highways, particularly expressways, where the requirements for wearing course performance are high.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an easy closely knit hot in-place recycling road surface structure with high tenacity ultra-thin wearing layer, through mix the in-process at the compound and add bituminous amine surfactant, can make hot in-place recycling mixture change in the compaction, the water stability of mixture can be improved to the amino simultaneously, and owing to increased 8mm ~ 15 mm's high tenacity ultra-thin pitch wearing layer on the surface on hot recycling road surface, make the water-resistant permeability on road surface layer, the travelling comfort all has great improvement with the homogeneity of graduation, it is unstable to have solved hot in-place recycling road surface graduation among the prior art, high low temperature performance all has certain defect and the difficult problem such as compaction.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an easily-compacted in-situ thermally-regenerated pavement structure with a high-toughness ultrathin wearing layer comprises a high-toughness ultrathin asphalt wearing layer, an SBS (styrene butadiene styrene) modified emulsified asphalt bonding layer, an in-situ thermally-regenerated asphalt pavement layer doped with an amine surfactant and an original asphalt concrete pavement structure layer which are arranged from top to bottom.
Further, the high-toughness ultrathin asphalt wearing layer is an asphalt mixture prepared by utilizing high-viscosity or ultrahigh-viscosity modified asphalt, 0.3% of polyester fiber is doped, and the oil-stone ratio is 6.5% -8.0%. Therefore, the improvement effect of the water-resistant permeability, the driving comfort and the grading uniformity of the surface layer of the pavement is better, and the hot-in-place recycling pavement is easier to compact.
Further, the thickness of the high-toughness ultrathin asphalt wearing layer is 8-15 mm.
Further, the nominal diameter of the maximum particle size of the high-toughness ultrathin asphalt wearing layer is 8 mm.
Further, the spreading amount of the SBS modified emulsified asphalt bonding layer is 0.4L/m2～0.6L/m2. In the construction process, the SBS modified emulsified asphalt is heated by the in-situ heat regeneration vehicle set, and the synchronous paver completes paving of the SBS modified emulsified asphalt bonding layer.
Further, the in-situ heat regeneration asphalt pavement layer doped with the amine surfactant is an in-situ heat regeneration asphalt pavement which is formed by heating and loosening an in-situ heat regeneration vehicle set, adding the regenerant and new aggregate, then performing re-mixing, drying, paving, leveling and compacting, and doping the amine surfactant with the mass of 0.3-0.5% of that of the in-situ heat regeneration asphalt in the re-mixing process. Therefore, the dynamic stability reaches more than 3000 times/mm, the freeze-thaw splitting strength ratio reaches more than 85 percent, and the construction temperature is reduced by 20 ℃. At the same time, the hot in place recycling of the mix is easier to compact, and the amino group can also improve the water stability of the mix.
Further, the thickness of the in-situ heat regeneration asphalt pavement layer doped with the amine surfactant is 40-60 mm.
Further, the nominal diameter of the maximum particle size of the in-situ heat regeneration asphalt pavement layer doped with the amine surfactant is 13-16 mm.
Further, the original asphalt concrete pavement structure layer is an original pavement structure under the in-situ heat regeneration layer, and the thickness of the original asphalt concrete pavement structure layer is the thickness of the original pavement structure minus the thickness of the in-situ heat regeneration treatment.
Compared with the prior art, the utility model provides an easily closely knit hot in-place recycling road surface structure with ultra-thin wearing layer of high tenacity possesses following beneficial effect:
(1) the utility model discloses through mix amine surfactant active in the process of remixing, can make hot in-place regeneration mixture more easily compact, and can reduce compaction temperature 20 ℃, and amino can improve the adhesion of pitch and aggregate simultaneously, can make freeze-thaw splitting strength ratio (TSR) improve to 90%, thereby improve the water stability of mixture;
(2) the utility model discloses the surface on hot regeneration road surface has increased the ultra-thin pitch wearing and tearing layer of high tenacity of 8mm ~ 15mm close gradation for the water-resistant permeability on road surface layer, travelling comfort and the homogeneity of gradation all have great improvement, have improved the quality on hot regeneration asphalt pavement in situ greatly.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of the present invention.
Reference numerals: 1. a high-toughness ultrathin asphalt wearing layer; 2. SBS modified emulsified asphalt adhesive coat; 3. an in-situ thermally regenerated asphalt pavement layer doped with an amine surfactant; 4. the original asphalt concrete pavement structure layer.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the detailed embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Referring to fig. 1, the present invention provides an easy-to-compact in-place hot recycling pavement structure with a high-toughness ultrathin wearing layer, which comprises a high-toughness ultrathin asphalt wearing layer 1, an SBS modified emulsified asphalt bonding layer 2, an in-place hot recycling asphalt pavement layer 3 doped with amine surfactant, and an original asphalt concrete pavement structure layer 4, all of which are arranged from top to bottom.
Wherein, the high-toughness ultrathin asphalt wearing layer 1 is an asphalt mixture prepared by utilizing high-viscosity or ultrahigh-viscosity modified asphalt, 0.3 percent of polyester fiber is doped, and the oil-stone ratio is 6.5 to 8.0 percent; the nominal diameter of the maximum grain diameter of the high-toughness ultrathin asphalt wearing layer 1 is 8mm, and the thickness is 8 mm-15 mm. Therefore, the improvement effect of the water-resistant permeability, the driving comfort and the grading uniformity of the surface layer of the pavement is better, and the hot-in-place recycling pavement is easier to compact.
The spreading amount of the SBS modified emulsified asphalt bonding layer 2 is 0.4L/m2～0.6L/m2. In the construction process, the SBS modified emulsified asphalt is heated by the in-situ heat regeneration vehicle set, and the synchronous paver completes paving of the SBS modified emulsified asphalt bonding layer.
The in-place hot recycling asphalt pavement layer 3 doped with the amine surfactant is an in-place hot recycling asphalt pavement which is formed by heating and loosening by adopting an in-place hot recycling vehicle set, adding the regenerant and new aggregates, then performing remixing, drying, paving, leveling and compacting construction, and doping the amine surfactant accounting for 0.3-0.5 percent of the mass of the in-place hot recycling asphalt in the remixing process; the maximum particle size of the in-situ thermally regenerated asphalt pavement layer 3 doped with the amine surfactant has a nominal diameter of 13mm to 16mm and a thickness of 40mm to 60 mm. Therefore, the dynamic stability reaches more than 3000 times/mm, the freeze-thaw splitting strength ratio reaches more than 85 percent, and the construction temperature is reduced by 20 ℃. At the same time, the hot in place recycling of the mix is easier to compact, and the amino group can also improve the water stability of the mix. Specifically, the amine surfactant is a commercially available product, which contains an amino group.
The original asphalt concrete pavement structure layer 4 is an original pavement structure under the in-situ heat regeneration layer, and the thickness of the original asphalt concrete pavement structure layer is the thickness of the original pavement structure minus the thickness of the in-situ heat regeneration treatment.
Compared with the prior art, the utility model discloses a mix amine surfactant in the process of remixing, can make hot in-place regeneration mixture more easily compact, and can reduce compaction temperature 20 ℃, and amino can improve the adhesion of pitch and aggregate simultaneously, can make freeze-thaw splitting strength ratio (TSR) improve to 90% to improve the water stability of mixture; furthermore, the utility model discloses the surface on hot regeneration road surface has increased the ultra-thin pitch wearing and tearing layer of high tenacity of 8mm ~ 15mm close gradation for the water-resistant permeability on road surface top layer, travelling comfort and the homogeneity of gradation all have great improvement, have improved the quality on hot regeneration asphalt pavement in situ greatly.
The structure of the present invention will be described below with reference to specific embodiments.
Example one
Referring to fig. 1, the present embodiment provides an easily compacted in-situ thermally-recycled pavement structure with a high-toughness ultrathin wearing layer, which includes a high-toughness ultrathin asphalt wearing layer 1, an SBS-modified emulsified asphalt bonding layer 2, an in-situ thermally-recycled asphalt pavement layer 3 doped with an amine surfactant, and an original asphalt concrete pavement structure layer 4, which are disposed from top to bottom.
The original asphalt concrete pavement structure layer 4 is an original pavement structure under a hot in-place recycling layer, the thickness of the original asphalt concrete pavement structure layer is the thickness of the original pavement structure minus the thickness of the hot in-place recycling treatment, and the original pavement structure is cleaned before the hot in-place recycling treatment. Then, paving an in-place hot recycling asphalt pavement layer 3 doped with amine surfactant, wherein the in-place hot recycling asphalt pavement layer 3 doped with amine surfactant is an in-place hot recycling asphalt pavement which is formed by heating and loosening by adopting an in-place hot recycling vehicle set, adding a regenerant and new aggregate, then performing re-mixing, drying, paving, leveling and compacting, and doping the amine surfactant with the mass of 0.3% of the in-place hot recycling asphalt in the re-mixing process; the maximum particle size of the hot in place recycled asphalt pavement layer 3 incorporating amine surfactants had a nominal diameter of 13mm and a thickness of 40 mm. Then, an SBS modified emulsified asphalt bonding layer 2 is laid, and the spreading amount of the SBS modified emulsified asphalt bonding layer 2 is 0.4L/m2. In the construction process, the SBS modified emulsified asphalt is heated by the in-situ heat regeneration vehicle set, and the synchronous paver completes paving of the SBS modified emulsified asphalt bonding layer. And finally, paving a high-toughness ultrathin asphalt wearing layer 1, wherein the high-toughness ultrathin asphalt wearing layer 1 is an asphalt mixture prepared by using high-viscosity or ultrahigh-viscosity modified asphalt, 0.3% of polyester fiber is doped, the oilstone ratio is 6.5%, the nominal diameter of the maximum particle size of the high-toughness ultrathin asphalt wearing layer 1 is 8mm, and the thickness is 8 mm. Tests show that the dynamic stability reaches 3137 times/mm, the freeze-thaw splitting strength ratio reaches 85%, and the construction temperature is reduced by 16 ℃.
Example two
Referring to fig. 1, the second embodiment provides an easily compacted in-situ thermally-recycled pavement structure with a high-toughness ultrathin wearing layer, which comprises a high-toughness ultrathin asphalt wearing layer 1, an SBS-modified emulsified asphalt bonding layer 2, an in-situ thermally-recycled asphalt pavement layer 3 doped with an amine surfactant, and an original asphalt concrete pavement structure layer 4, which are arranged from top to bottom.
The original asphalt concrete pavement structure layer 4 is an original pavement structure under a hot in-place recycling layer, the thickness of the original asphalt concrete pavement structure layer is the thickness of the original pavement structure minus the thickness of the hot in-place recycling treatment, and the original pavement structure is cleaned before the hot in-place recycling treatment. Then, paving an in-place hot recycling asphalt pavement layer 3 doped with amine surfactant, wherein the in-place hot recycling asphalt pavement layer 3 doped with amine surfactant is an in-place hot recycling asphalt pavement which is formed by heating and loosening by adopting an in-place hot recycling vehicle set, adding a regenerant and new aggregate, then performing re-mixing, drying, paving, leveling and compacting, and doping the amine surfactant with the mass of 0.4% of the in-place hot recycling asphalt in the re-mixing process; the maximum particle size of the hot in place recycled asphalt pavement layer 3 incorporating amine surfactants has a nominal diameter of 15mm and a thickness of 50 mm. Then, an SBS modified emulsified asphalt bonding layer 2 is laid, and the spreading amount of the SBS modified emulsified asphalt bonding layer 2 is 0.5L/m2. In the construction process, the SBS modified emulsified asphalt is heated by the in-situ heat regeneration vehicle set, and the synchronous paver completes paving of the SBS modified emulsified asphalt bonding layer. And finally, paving a high-toughness ultrathin asphalt wearing layer 1, wherein the high-toughness ultrathin asphalt wearing layer 1 is an asphalt mixture prepared by using high-viscosity or ultrahigh-viscosity modified asphalt, 0.3% of polyester fiber is doped, the oilstone ratio is 7.3%, the nominal diameter of the maximum particle size of the high-toughness ultrathin asphalt wearing layer 1 is 8mm, and the thickness is 12 mm. Tests show that the dynamic stability reaches 3650 times/mm, the freeze-thaw splitting strength ratio reaches 90%, and the construction temperature is reduced by 20 ℃.
EXAMPLE III
Referring to fig. 1, the third embodiment provides an easily compacted in-situ thermally-recycled pavement structure with a high-toughness ultrathin wearing layer, which comprises a high-toughness ultrathin asphalt wearing layer 1, an SBS-modified emulsified asphalt bonding layer 2, an in-situ thermally-recycled asphalt pavement layer 3 doped with an amine surfactant, and an original asphalt concrete pavement structure layer 4, which are arranged from top to bottom.
The original asphalt concrete pavement structure layer 4 is an original pavement structure under a hot in-place recycling layer, the thickness of the original asphalt concrete pavement structure layer is the thickness of the original pavement structure minus the thickness of the hot in-place recycling treatment, and the original pavement structure is cleaned before the hot in-place recycling treatment. Then, paving an in-place hot recycling asphalt pavement layer 3 doped with amine surfactant, wherein the in-place hot recycling asphalt pavement layer 3 doped with amine surfactant is an in-place hot recycling asphalt pavement which is formed by heating and loosening by adopting an in-place hot recycling vehicle set, adding a regenerant and new aggregate, then performing re-mixing, drying, paving, leveling and compacting, and doping the amine surfactant with the mass of 0.5% of the in-place hot recycling asphalt in the re-mixing process; the maximum particle size of the hot in place recycled asphalt pavement layer 3 incorporating amine surfactants has a nominal diameter of 16mm and a thickness of 60 mm. Then, an SBS modified emulsified asphalt bonding layer 2 is laid, and the spreading amount of the SBS modified emulsified asphalt bonding layer 2 is 0.6L/m2. In the construction process, the SBS modified emulsified asphalt is heated by the in-situ heat regeneration vehicle set, and the synchronous paver completes paving of the SBS modified emulsified asphalt bonding layer. And finally, paving a high-toughness ultrathin asphalt wearing layer 1, wherein the high-toughness ultrathin asphalt wearing layer 1 is an asphalt mixture prepared by using high-viscosity or ultrahigh-viscosity modified asphalt, 0.3% of polyester fiber is doped, the oilstone ratio is 8.0%, the nominal diameter of the maximum particle size of the high-toughness ultrathin asphalt wearing layer 1 is 8mm, and the thickness is 15 mm. Tests show that the dynamic stability reaches 3466 times/mm, the freeze-thaw splitting strength ratio reaches 86%, and the construction temperature is reduced by 18 ℃.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. The easy-to-compact in-situ thermally-regenerated pavement structure with the high-toughness ultrathin wearing layer is characterized by comprising the high-toughness ultrathin asphalt wearing layer, an SBS (styrene butadiene styrene) modified emulsified asphalt bonding layer, an in-situ thermally-regenerated asphalt pavement layer doped with an amine surfactant and an original asphalt concrete pavement structure layer which are arranged from top to bottom.
2. The structure of claim 1, wherein the high toughness ultra-thin wearing layer of asphalt has a thickness of 8mm to 15 mm.
3. The structure of claim 1, wherein the high tenacity ultra-thin asphalt wearing layer has a nominal diameter of 8mm at its largest diameter.
4. The structure of claim 1, wherein the SBS modified emulsified asphalt binder layer has a distribution of 0.4L/m2～0.6L/m2。
5. The structure of claim 1, wherein the thickness of the thermally-regenerated asphalt pavement layer doped with amine surfactant is 40-60 mm.
6. The structure of claim 1, wherein the maximum particle size of the thermally-regenerated asphalt pavement layer is 13-16 mm in nominal diameter.
7. The easily compacted in situ thermally recycled pavement structure with a high toughness ultra-thin wearing layer as claimed in claim 1, wherein said original asphalt concrete pavement structure layer is the original pavement structure under the in situ thermal recycling layer, and the thickness of the original asphalt concrete pavement structure layer is the thickness of the original pavement structure minus the thickness of the in situ thermal recycling treatment.
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| CN201922169817.2U CN212077524U (en) | 2019-12-06 | 2019-12-06 | Easily-compacted in-place heat regeneration pavement structure with high-toughness ultrathin wearing layer |
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| CN201922169817.2U CN212077524U (en) | 2019-12-06 | 2019-12-06 | Easily-compacted in-place heat regeneration pavement structure with high-toughness ultrathin wearing layer |
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