CN217266706U - Hot regeneration road surface structure of plantmix - Google Patents
Hot regeneration road surface structure of plantmix Download PDFInfo
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- CN217266706U CN217266706U CN202220708166.9U CN202220708166U CN217266706U CN 217266706 U CN217266706 U CN 217266706U CN 202220708166 U CN202220708166 U CN 202220708166U CN 217266706 U CN217266706 U CN 217266706U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The utility model provides a hot recycling pavement structure of a plant mixing plant, which comprises an asphalt surface layer, a base layer and a subbase layer from top to bottom in sequence; the asphalt surface layer sequentially comprises an upper plant-mixed hot recycled asphalt surface layer, a middle plant-mixed hot recycled asphalt surface layer and a lower plant-mixed hot recycled asphalt surface layer from top to bottom; the base layer is a regenerated cement stabilized macadam base layer; the subbase layer is a solidified soil subbase layer. The asphalt surface layer of the utility model uses the hot recycled mixture of the plant mixing of three layers to replace the traditional recycled mixture of 1-2 layers, adopts the recycled cement stabilized macadam base layer to replace the traditional cement stabilized macadam base layer, and uses the solidified soil layer to replace the traditional subbase layer water-stable or two-ash stabilized macadam structure; for the bituminous paving of traditional whole preparation that use newly to gather materials, the utility model discloses the quantity that can reduce new grit and gather materials is not less than 50%, has better environmental protection benefit.
Description
Technical Field
The utility model relates to a highway engineering material technical field particularly, relates to a hot regeneration road surface structure of plantmix.
Background
With the rapid development of social economy, the traffic volume is rapidly increased, the proportion of heavy load traffic volume is increased day by day, and the original road cannot meet the increasing traffic volume and load requirements. Therefore, a large amount of roads are upgraded and reconstructed, however, a large amount of old road materials are generated in the reconstruction process, and how to change the old road materials into valuables and reuse the changed materials becomes the key point of each reconstruction project.
The hot recycling of the plant mixing is to transport the old asphalt pavement back to the mixing plant after digging, then to be crushed in a centralized way, to design the mixture ratio according to the quality requirements of different levels of the pavement, to determine the adding proportion of the old asphalt mixture, and to mix the regenerant, the new asphalt material, the new aggregate and the like in the mixing plant again according to a certain proportion to form a new mixture, so as to obtain excellent recycled asphalt concrete, to be paved into a recycled asphalt pavement, and to recycle the milling material (RAP) of the old asphalt pavement.
When the existing plant-mixed hot recycling mixture is applied to a new project, the plant-mixed hot recycling mixture is mainly applied to a middle-lower surface layer, is rarely applied to an upper surface layer, and is mainly applied in a single-layer or double-layer mode, and the mixing amount of asphalt pavement milling materials in the hot recycling mixture is usually not more than 30%; in addition, the thickness of a base layer (including a subbase layer) of the asphalt pavement is usually 56-60 cm, a large amount of sandstone aggregates are consumed for constructing the base layer, the existing production downtime of a large amount of sandstone aggregates causes the shortage of the supply and demand of the sandstone aggregates on the market, and how to reduce the consumption of the sandstone aggregates by using a thermal regeneration mixture and optimizing the structure in the road construction process has important practical significance for promoting the early realization of the double-carbon target in China.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a hot regeneration road surface structure of plantmix to solve among the prior art big problem of the new grit consumption that gathers materials of road surface construction in-process.
In order to achieve the purpose, the following technical scheme is adopted:
the utility model provides a hot recycling pavement structure of plant mixing, which comprises an asphalt surface layer, a base layer and a subbase layer from top to bottom in sequence;
the asphalt surface layer sequentially comprises an upper plant-mixed hot recycled asphalt surface layer, a middle plant-mixed hot recycled asphalt surface layer and a lower plant-mixed hot recycled asphalt surface layer from top to bottom;
the base layer is a regenerated cement stabilized macadam base layer;
the subbase layer is a solidified soil subbase layer.
Further, the upper surface layer of the plant-mixed hot recycled asphalt is any one of SMA-13, SUP-13 or AC-13 asphalt mixture.
Furthermore, the middle surface layer of the plant-mixed hot recycled asphalt is SUP-20 or AC-20 asphalt mixture.
Further, the lower surface layer of the plant-mixed hot recycled asphalt is a SUP-25 or AC-25 asphalt mixture.
Further, the lower surface layer of the plant-mixed hot recycled asphalt is arranged on the upper surface of the recycled cement stabilized macadam base layer; the regenerated cement stabilized macadam base layer is arranged on the upper surface of the solidified soil subbase layer.
Further, the thickness of the upper surface layer of the hot plant mix recycled asphalt is 4-5 cm.
Further, the thickness of the middle surface layer of the hot mix plant recycled asphalt is 6-8 cm.
Further, the thickness of the lower layer of the plant-mixed hot recycled asphalt is 8-10 cm.
Furthermore, the thickness of the regenerated cement stabilized macadam foundation is 36-40 cm.
Furthermore, the thickness of the solidified soil subbase layer is 18-20 cm.
Further, non-wheel-sticking emulsified asphalt is sprayed between the upper surface layer of the plant-mixed hot recycled asphalt and the middle surface layer of the plant-mixed hot recycled asphalt, and between the middle surface layer of the plant-mixed hot recycled asphalt and the lower surface layer of the plant-mixed hot recycled asphalt, and a synchronous gravel sealing layer is arranged between the lower surface layer of the plant-mixed hot recycled asphalt and the recycled cement stabilized gravel base.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the utility model discloses a bituminous surface layer has used the hot regeneration mixture of plantmix of three-layer, and compared with the traditional regeneration mixture of using 1-2 layers, the utility model discloses to the quantity of RAP promote more than 30%, reduced bituminous mixture and used as new grit aggregate in;
(2) the subbase uses the solidified soil layer to replace the traditional subbase water-stable or two-ash stable gravel structure, the subbase can achieve the structural strength without using gravel aggregate, and the use amount of the subbase gravel aggregate is reduced by 100%;
(3) compared with the traditional cement stabilized macadam foundation prepared by using new aggregates, the adopted regenerated cement stabilized macadam foundation can reduce the consumption of new sandstone aggregates by not less than 40 percent;
(4) for the bituminous paving of traditional whole preparation that use newly to gather materials, the utility model discloses the quantity that can reduce new grit and gather materials is not less than 50%, has better environmental protection benefit.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of the hot recycling pavement structure of plant mixing of the present invention.
1-plant mixing hot recycled asphalt upper surface layer; 2-hot mix plant recycling asphalt middle surface layer; 3-hot mix plant recycling asphalt lower surface layer; 4-regenerating a cement stabilized macadam base; 5-solidifying the soil subbase layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.
As shown in figure 1, the hot recycling pavement structure of plant mixing provided by the utility model comprises an asphalt surface layer, a base layer and a subbase layer from top to bottom in sequence. The base layer is a regenerated cement stabilized macadam base layer 4; the subbase is a solidified soil subbase 5.
The asphalt surface layer can bear larger traffic load and reduce the influence caused by rainfall and air temperature change, and also has higher structural strength, water stability and temperature stability.
The base layer and the subbase layer mainly bear vertical force and horizontal force generated by vehicle load transmitted by the surface layer and diffuse to the roadbed below, are main bearing layers of the pavement structure, and have good strength and rigidity, stress diffusion performance and fatigue resistance performance.
Wherein the plant-mixed hot recycled asphalt upper surface layer 1 in the asphalt surface layer is one of SMA-13, SUP-13 or AC-13 in the mixture type and has the thickness of 4-5 cm.
The hot mix plant recycling asphalt middle surface layer 2 in the asphalt surface layer is one of SUP-20 or AC-20 in mixture type, and the thickness is 6-8 cm.
And the plant-mixed hot recycled asphalt lower surface layer 3 in the asphalt surface layer is one of SUP-25 or AC-25 in mixture type and is 8-10 cm in thickness.
In order to utilize RAP more, the utility model discloses an asphalt surface course is provided with 3 surface courses, according to the thickness (upper strata 4 ~ 5cm, well surface course 6 ~ 8cm, 8 ~ 10cm of lower surface course) of the horizon (upper strata) and each horizon of difference (middle, lower surface course), the maximum nominal particle diameter of the mixture of using is different, and thickness is 2.5 times of maximum nominal particle diameter usually, consequently goes up the mixture that middle, lower surface course used 3 kinds of maximum nominal particle diameters.
The utility model discloses a hot regeneration asphalt upper strata of plantmix 1 has wear-resisting, waterproof and good skid resistance in the 3 pitch surface course, and surface course 2, plantmix hot regeneration asphalt lower surface course 3 have better resistance to deformation and water stability ability in the plantmix hot regeneration asphalt.
The bituminous surface layer is compared in the regeneration mixture on traditional 1 ~ 2 layers of application, the utility model discloses quantity to the RAP has promoted more than 30%, has reduced the use that new grit gathers materials among the bituminous mixture.
The base course is a regenerated cement stabilized macadam base course 4, and the thickness is 36-40 cm.
The utility model discloses a rubble basic unit is stabilized to regeneration cement 4 compare traditional cement stabilization rubble basic unit that uses the preparation of newly gathering materials, can reduce new grit consumption of gathering materials and be not less than 40%.
The subbase layer is a solidified soil subbase layer 5, and the thickness of the subbase layer is 18-20 cm.
The utility model discloses a subbase uses the solidification soil layer to replace traditional subbase water steady or two grey stabilized macadam structures, and the subbase need not use the grit to gather materials and can reach structural strength, reduces the subbase grit quantity of gathering materials 100%.
Non-wheel-sticking emulsified asphalt is sprayed between the plant-mixed hot recycled asphalt upper surface layer 1 and the plant-mixed hot recycled asphalt middle surface layer 2, and between the plant-mixed hot recycled asphalt middle surface layer 2 and the plant-mixed hot recycled asphalt lower surface layer 3, and the spraying amount is 0.4-0.6 kg/m 2 。
The non-stick wheel emulsified asphalt is used as a sticky layer between the asphalt surface layers, so that the construction damage caused by sticking wheels of a skip car and a paver in the construction process is reduced, and the integrity of the pavement structure is improved.
A synchronous gravel seal is arranged between the plant-mixed hot recycled asphalt lower surface layer 3 and the recycled cement stabilized gravel base.
The primary function of synchronous rubble seal lies in preventing that moisture infiltration basic unit from leading to the water damage such as loose appearing in the basic unit the utility model discloses in, prevent that moisture from oozing under the pitch surface course among regeneration cement stabilized macadam basic unit 4 and the solidified soil subbase 5.
The present invention will be described in further detail with reference to examples.
Example 1
The embodiment provides a hot-mix plant recycling pavement structure which sequentially comprises an upper hot-mix plant recycling asphalt surface layer 1 with the thickness of 4cm, a middle hot-mix plant recycling asphalt surface layer 2 with the thickness of 6cm, a lower hot-mix plant recycling asphalt surface layer 3 with the thickness of 8cm, a recycled cement stabilized macadam base layer 4 with the thickness of 36cm and a solidified soil base layer 5 with the thickness of 20cm from top to bottom.
The mixture of the upper layer 1 of the plant-mixed hot recycled asphalt is AC-13, the mixture of the middle layer 2 of the plant-mixed hot recycled asphalt is AC-20, and the mixture of the lower layer 3 of the plant-mixed hot recycled asphalt is AC-25.
Non-stick wheel emulsification is sprayed between the plant-mixed hot recycled asphalt upper surface layer 1 and the plant-mixed hot recycled asphalt middle surface layer 2, and between the plant-mixed hot recycled asphalt middle surface layer 2 and the plant-mixed hot recycled asphalt lower surface layer 3The spreading amount of the asphalt is 0.4kg/m 2 And a synchronous gravel seal layer is arranged between the plant-mixed hot recycled asphalt lower surface layer 3 and the recycled cement stabilized gravel base layer 4.
The structural water seepage coefficient of the plant-mixed hot recycling pavement provided by the embodiment is less than or equal to 80ml/min, and the flatness is less than or equal to 2 mm.
Example 2
The embodiment provides a hot-mix plant recycling pavement structure which sequentially comprises an upper hot-mix plant recycling asphalt surface layer 1 with the thickness of 4cm, a middle hot-mix plant recycling asphalt surface layer 2 with the thickness of 6cm, a lower hot-mix plant recycling asphalt surface layer 3 with the thickness of 8cm, a recycled cement stabilized macadam base layer 4 with the thickness of 36cm and a solidified soil base layer 5 with the thickness of 20cm from top to bottom.
The mixture of the upper layer 1 of the plant-mixed hot recycled asphalt is SUP-13, the mixture of the middle layer 2 of the plant-mixed hot recycled asphalt is SUP-20, and the mixture of the lower layer 3 of the plant-mixed hot recycled asphalt is SUP-25.
Non-wheel-sticking emulsified asphalt is sprayed between the upper hot-mix plant recycled asphalt layer 1 and the middle hot-mix plant recycled asphalt layer 2, and between the middle hot-mix plant recycled asphalt layer 2 and the lower hot-mix plant recycled asphalt layer 3, and the spraying amount is 0.4kg/m 2 And a synchronous gravel seal layer is arranged between the plant-mixed hot recycled asphalt lower surface layer 3 and the recycled cement stabilized gravel base layer 4.
The plant-mixed hot recycling pavement structure provided by the embodiment has the water seepage coefficient of less than or equal to 80ml/min and the flatness of less than or equal to 2 mm.
Example 3
The embodiment provides a hot mix plant recycling pavement structure, which sequentially comprises an upper hot mix plant recycling asphalt surface layer 1 with the thickness of 5cm, a middle hot mix plant recycling asphalt surface layer 2 with the thickness of 8cm, a lower hot mix plant recycling asphalt surface layer 3 with the thickness of 10cm, a recycled cement stabilized macadam base layer 4 with the thickness of 40cm and a solidified soil base layer 5 with the thickness of 18cm from top to bottom.
The mixture of the upper layer 1 of the plant-mixed hot recycled asphalt is AC-13, the mixture of the middle layer 2 of the plant-mixed hot recycled asphalt is AC-20, and the mixture of the lower layer 3 of the plant-mixed hot recycled asphalt is AC-25.
The upper layer 1 of the plant-mixed hot recycled asphalt and the middle layer 2 of the plant-mixed hot recycled asphaltNon-wheel-sticking emulsified asphalt is sprayed between the middle surface layer 2 of the hot mix recycled asphalt and the lower surface layer 3 of the hot mix plant recycled asphalt, and the spraying amount is 0.4kg/m 2 And a synchronous gravel seal layer is arranged between the plant-mixed hot recycled asphalt lower surface layer 3 and the recycled cement stabilized gravel base layer 4.
The plant-mixed hot recycling pavement structure provided by the embodiment has the water seepage coefficient of less than or equal to 80ml/min and the flatness of less than or equal to 2 mm.
The properties of the wheel-tack free emulsified asphalt used in examples 1 to 3 are shown in the following table:
the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The plant-mixed hot recycling pavement structure is characterized by comprising an asphalt surface layer, a base layer and a subbase layer from top to bottom in sequence;
the asphalt surface layer sequentially comprises an upper plant-mixed hot recycled asphalt surface layer, a middle plant-mixed hot recycled asphalt surface layer and a lower plant-mixed hot recycled asphalt surface layer from top to bottom;
the base layer is a regenerated cement stabilized macadam base layer;
the subbase layer is a solidified soil subbase layer.
2. The hot plant recycling pavement structure of claim 1, wherein the upper layer of hot plant recycling asphalt is any one of SMA-13, SUP-13 or AC-13 asphalt mixture.
3. The hot plant recycling pavement structure of claim 1, wherein the mid-coat of hot plant recycling asphalt is SUP-20 or AC-20 asphalt mix.
4. The hot plant recycling pavement structure of claim 1, wherein the hot plant recycling asphalt lower layer is a SUP-25 or AC-25 asphalt mix.
5. The hot mix plant recycling pavement structure of claim 1, wherein the thickness of the upper layer of hot mix plant recycling asphalt is 4-5 cm.
6. The hot-mix plant recycling pavement structure according to claim 1, wherein the thickness of the middle surface layer of the hot-mix plant recycling asphalt is 6-8 cm.
7. The hot-mix plant recycling pavement structure according to claim 1, wherein the thickness of the lower layer of the hot-mix plant recycling asphalt is 8-10 cm.
8. The hot plantmix recycled pavement structure of claim 1, wherein the thickness of the recycled cement stabilized macadam base is 36-40 cm.
9. The hot-mix plant recycling pavement structure according to claim 1, wherein the solidified soil subbase layer has a thickness of 18-20 cm.
10. The hot-mix recycled pavement structure according to claim 1, wherein non-wheel-sticking emulsified asphalt is sprayed between the upper hot-mix recycled asphalt layer and the middle hot-mix recycled asphalt layer, and between the middle hot-mix recycled asphalt layer and the lower hot-mix recycled asphalt layer;
and a synchronous broken stone seal layer is arranged between the lower surface layer of the plant-mixed hot recycled asphalt and the recycled cement stabilized broken stone base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202220708166.9U CN217266706U (en) | 2022-03-29 | 2022-03-29 | Hot regeneration road surface structure of plantmix |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220708166.9U CN217266706U (en) | 2022-03-29 | 2022-03-29 | Hot regeneration road surface structure of plantmix |
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| CN217266706U true CN217266706U (en) | 2022-08-23 |
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| CN202220708166.9U Active CN217266706U (en) | 2022-03-29 | 2022-03-29 | Hot regeneration road surface structure of plantmix |
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