CN220685659U - Full steel slag type pavement structure with steel slag wearing layer - Google Patents
Full steel slag type pavement structure with steel slag wearing layer Download PDFInfo
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- CN220685659U CN220685659U CN202322212322.XU CN202322212322U CN220685659U CN 220685659 U CN220685659 U CN 220685659U CN 202322212322 U CN202322212322 U CN 202322212322U CN 220685659 U CN220685659 U CN 220685659U
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- 239000002893 slag Substances 0.000 title claims abstract description 273
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 262
- 239000010959 steel Substances 0.000 title claims abstract description 262
- 239000010410 layer Substances 0.000 claims abstract description 177
- 239000010426 asphalt Substances 0.000 claims abstract description 107
- 239000002344 surface layer Substances 0.000 claims abstract description 53
- 239000000203 mixture Substances 0.000 claims description 61
- 239000011230 binding agent Substances 0.000 claims description 23
- 238000005299 abrasion Methods 0.000 claims description 17
- 239000012790 adhesive layer Substances 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000004593 Epoxy Substances 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 239000002356 single layer Substances 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 10
- 239000004575 stone Substances 0.000 description 12
- 239000000428 dust Substances 0.000 description 9
- 230000032683 aging Effects 0.000 description 8
- 239000004576 sand Substances 0.000 description 8
- 238000003801 milling Methods 0.000 description 7
- 235000019738 Limestone Nutrition 0.000 description 6
- 239000006028 limestone Substances 0.000 description 6
- 239000004568 cement Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 5
- 238000005336 cracking Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 239000012744 reinforcing agent Substances 0.000 description 4
- 201000010099 disease Diseases 0.000 description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000002910 solid waste Substances 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000013543 active substance Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 229920005610 lignin Polymers 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 229920006122 polyamide resin Polymers 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
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- Road Paving Structures (AREA)
Abstract
The utility model discloses a full steel slag pavement structure with a steel slag wearing layer, which comprises a steel slag wearing layer, a waterproof bonding layer, a steel slag asphalt surface layer, a first stable steel slag base layer and a second stable steel slag subbase layer which are sequentially arranged from top to bottom, wherein the thickness of the steel slag wearing layer is 10-25 mm. According to the all-steel slag pavement structure with the steel slag wearing layer, the steel slag wearing layer is adopted as the pavement surface layer, and only the steel slag wearing layer with the thickness of 10-25 mm is required to be milled and paved during pavement maintenance, so that the technical problem of high maintenance cost of the existing pavement surface is solved.
Description
Technical Field
The utility model relates to the technical field of pavement structures, in particular to an all-steel slag pavement structure with a steel slag abrasion layer.
Background
Along with the continuous development of road engineering technology in China, engineering technicians increasingly pay attention to resource conservation and green low carbon of road construction, and safety, durability, skid resistance and noise reduction characteristics in the road use stage. In recent years, under the background of continuously enhancing mineral resource management, the number of mine in the volume of China is greatly reduced, and the price of natural sand aggregates is continuously increased due to a major gap of the supply end face of the natural sand aggregates. Therefore, searching for a large amount of solid waste capable of being recycled as a natural sand and stone aggregate substitute has become an effective way for achieving the purposes of saving road resources and realizing green low carbon.
The steel slag is a byproduct in the steelmaking process, belongs to a large amount of solid wastes, has the characteristics of firmness, wear resistance, small needle-shaped content and the like, can replace basalt, limestone and other natural aggregates to be used in each structural layer of the pavement, and can give consideration to good mechanical properties and durability. With the regulation and control of active substances in the molten steel slag and the aging treatment of the solidified steel slag, the active substances in the steel slag are greatly reduced, the technical problem of poor stability of the steel slag is solved, and the engineering application of the steel slag is promoted. The steel slag can effectively relieve the shortage of high-quality natural aggregates in road engineering, can realize the large-scale and high-added-value recycling of large solid wastes, can save a large amount of land occupied by steel slag stacking, and has remarkable social and economic benefits.
In addition, under the background that the design concept of the long-life pavement structure is continuously developed and the road construction quality is continuously improved, the phenomena of structural diseases such as damage, cracking and the like of the asphalt pavement are less and less. In contrast, in the designed service life, most of pavement surfaces are not structurally damaged, but the road surface anti-skid performance cannot meet the requirements of safe running in rainy days. Therefore, the road surface anti-skid performance can be recovered by only periodically repairing the milling surface of the road surface, and the road surface structure without major repair is an effective way for ensuring the anti-skid, safe and durable road surface.
The ultra-thin wearing layer structure has the advantages that due to the uniform skeleton structure and the anti-skid structure, the occurrence rate of road traffic safety accidents is greatly reduced, meanwhile, the ultra-thin wearing layer structure has the noise reduction function, the influence of driving noise on drivers and surrounding residents is reduced, the thickness is only 10-25 millimeters (mm), road building materials can be saved, and meanwhile, the engineering cost is reduced. When the surface of the road surface has unstructured diseases such as loosening, cracking, rapid decay of anti-skid performance and the like, the road surface function can be recovered by only milling and re-paving the ultra-thin wearing layer. Compared with the traditional milling and re-paving technology (generally needing to mill and re-pave an upper surface layer of 40 mm), the method effectively reduces the cost of the over-high whole life cycle caused by frequent maintenance of the road surface, simultaneously avoids generating a large amount of milling materials, and reduces the resource waste. The steel slag is used for replacing natural aggregate in the ultrathin wearing layer, the rutting resistance of the ultrathin wearing layer can be further enhanced, and in addition, the reduction rate of the road surface skid resistance is lower due to the good wear resistance of the steel slag.
Disclosure of Invention
The utility model mainly aims to provide a full steel slag pavement structure with a steel slag wearing layer and aims to solve the technical problems that an existing pavement adopts an asphalt upper layer with a large thickness (more than 40 mm), the asphalt upper layer cannot meet the requirements of safe driving in rainy days in terms of skid resistance after long-time use, pavement maintenance is needed, and when the pavement is maintained, the asphalt upper layer with the large thickness is needed to be milled and paved, so that maintenance cost of the pavement is high.
In order to achieve the above purpose, the utility model provides an all-steel slag pavement structure with a steel slag abrasion layer, which comprises the steel slag abrasion layer, a waterproof adhesive layer, a steel slag asphalt surface layer, a first stable steel slag base layer and a second stable steel slag subbase layer which are sequentially arranged from top to bottom, wherein the layer thickness of the steel slag abrasion layer is 10 to 25 millimeters.
Further, the maximum nominal grain diameter of the steel slag selected by the steel slag abrasion layer is not more than 4.75 mm.
Further, the steel slag asphalt surface layer comprises a fine-grain steel slag asphalt mixture upper surface layer, a middle-grain steel slag asphalt mixture middle surface layer and a coarse-grain steel slag asphalt mixture lower surface layer, wherein the thickness of the fine-grain steel slag asphalt mixture upper surface layer is 30-50 mm, the thickness of the middle-grain steel slag asphalt mixture middle surface layer is 50-70 mm, and the thickness of the coarse-grain steel slag asphalt mixture lower surface layer is 70-90 mm.
Further, the maximum nominal grain size of the steel slag on the upper surface layer of the fine-grain type steel slag asphalt mixture, the maximum nominal grain size of the steel slag on the middle surface layer of the medium-grain type steel slag asphalt mixture and the maximum nominal grain size of the steel slag on the lower surface layer of the coarse-grain type steel slag asphalt mixture are gradually increased.
Further, the maximum nominal grain size of the steel slag on the upper layer of the fine grain type steel slag asphalt mixture is not more than 13.2 mm, the maximum nominal grain size of the steel slag on the middle layer of the fine grain type steel slag asphalt mixture is not more than 19 mm, and the maximum nominal grain size of the steel slag on the lower layer of the coarse grain type steel slag asphalt mixture is not more than 31.5 mm.
Further, the first stable steel slag base layer is at least one of an inorganic binder stable steel slag layer and an asphalt stable steel slag layer.
Further, the inorganic binder stable steel slag layer adopts a single-layer structure or a double-layer structure, and the thickness of the layer structure of the inorganic binder stable steel slag layer is 180-220 mm.
Further, the thickness of the asphalt stabilized slag layer is 80-140 mm.
Further, the second stable steel slag subbase layer adopts a low-dose inorganic binder to stabilize the steel slag layer, and the thickness is 180-220 mm.
Further, the waterproof adhesive layer is a non-adhesive wheel modified emulsified asphalt layer or a water-based epoxy asphalt layer.
The beneficial effects of the utility model are as follows:
the utility model provides a full steel slag pavement structure with a steel slag wearing layer, which comprises a steel slag wearing layer, a waterproof bonding layer, a steel slag asphalt surface layer, a first stable steel slag base layer and a second stable steel slag subbase layer which are sequentially arranged from top to bottom, wherein the thickness of the steel slag wearing layer is 10-25 mm; by adopting the steel slag wearing layer as the road surface layer, the steel slag wearing layer with the thickness of 10 to 25 millimeters is only needed to be milled and paved during maintenance of the road surface, so that the technical problem of high maintenance cost of the conventional road surface is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic illustration of an all-steel slag pavement structure with a steel slag wear layer in accordance with one embodiment of the present utility model;
fig. 2 is a schematic structural view of an all-steel slag pavement structure with a steel slag wear layer according to another embodiment of the present utility model.
Legend description:
100. an all steel slag pavement structure with a steel slag wearing layer; 10. a steel slag wearing layer; 20. a waterproof adhesive layer; 30. steel slag asphalt surface layer; 31. fine grain type steel slag asphalt mixture upper layer; 32. a middle-grain type steel slag asphalt mixture middle surface layer; 33. a coarse-grain steel slag asphalt mixture lower layer; 40. a first stable steel slag base layer; 41. asphalt stabilizes the steel slag layer; 42. the inorganic binder stabilizes the steel slag layer; 50. and a second stable steel slag subbase layer.
The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.
Referring to fig. 1 and 2, the present utility model provides an all-steel slag pavement structure 100 with a steel slag abrasion layer 10, which comprises the steel slag abrasion layer 10, a waterproof adhesive layer 20, a steel slag asphalt surface layer 30, a first stable steel slag base layer 40 and a second stable steel slag subbase layer 50 sequentially arranged from top to bottom, wherein the layer thickness of the steel slag abrasion layer 10 is 10 to 25 mm.
The utility model provides an all-steel slag pavement structure 100 with a steel slag wearing layer 10, which comprises the steel slag wearing layer 10, a waterproof bonding layer 20, a steel slag asphalt surface layer 30, a first stable steel slag base layer 40 and a second stable steel slag subbase layer 50 which are sequentially arranged from top to bottom, wherein the layer thickness of the steel slag wearing layer 10 is 10 to 25 mm; by adopting the steel slag wearing layer 10 as the road surface layer, the steel slag wearing layer 10 with the thickness of 10 to 25 millimeters is only needed to be milled and paved during maintenance of the road surface, and the technical problem of high maintenance cost of the conventional road surface is avoided.
Further, the maximum nominal grain size of the steel slag selected by the steel slag abrasion layer 10 is not more than 4.75 mm. It will be appreciated that the thickness of the steel slag wearing layer 10 is 10 to 25 mm, and the steel slag particle size is 2.36 to 4.75 mm. Specifically, the steel slag abrasion layer 10 comprises fine aggregate and coarse aggregate, wherein the coarse aggregate adopts steel slag with the specification of 2.36-4.75 mm, and the ageing time of the steel slag is more than 6 months; the fine aggregate adopts limestone machine-made sand or stone dust with the specification of 0-2.36 mm.
In the embodiment of the utility model, the steel slag abrasion layer 10 comprises 70-85 parts of steel slag with the specification of 2.36-4.75 mm, 10-15 parts of stone dust with the specification of 0-2.36 mm, 6-6.5 parts of SBS modified asphalt, 0.1-0.3 part of lignin fiber and 0.5-2 parts of reinforcing agent; the reinforcing agent is polyamide resin.
Further, the pendulum friction coefficient BPN of the steel slag wearing layer 10 20 More than or equal to 60, and the construction depth is more than or equal to 0.55 mm。
Further, the steel slag asphalt surface layer 30 comprises a fine-grain steel slag asphalt mixture upper surface layer 31, a middle-grain steel slag asphalt mixture middle surface layer 32 and a coarse-grain steel slag asphalt mixture lower surface layer 33, wherein the thickness of the fine-grain steel slag asphalt mixture upper surface layer 31 is 30-50 mm, the thickness of the middle-grain steel slag asphalt mixture middle surface layer 32 is 50-70 mm, and the thickness of the coarse-grain steel slag asphalt mixture lower surface layer 33 is 70-90 mm.
Further, the steel slag maximum nominal particle size of the fine-grain type steel slag asphalt mixture upper surface layer 31, the steel slag maximum nominal particle size of the medium-grain type steel slag asphalt mixture middle surface layer 32 and the steel slag maximum nominal particle size of the coarse-grain type steel slag asphalt mixture lower surface layer 33 are gradually increased.
Further, the maximum nominal steel slag particle size of the upper layer 31 of the fine-grain steel slag asphalt mixture is not more than 13.2 mm, the maximum nominal steel slag particle size of the middle layer 32 of the fine-grain steel slag asphalt mixture is not more than 19 mm, and the maximum nominal steel slag particle size of the lower layer 33 of the coarse-grain steel slag asphalt mixture is not more than 31.5 mm.
In one embodiment of the utility model, the thickness of the upper layer 31 of the fine-grain steel slag asphalt mixture is 30-50 mm, the maximum nominal grain diameter is a dense asphalt layer of 13.2 mm steel slag, wherein coarse aggregate adopts steel slag with three specifications of 2.36-4.75 mm, 4.75-9.5 mm and 9.5-13.2 mm, the steel slag aging time is more than 6 months, and fine aggregate adopts limestone machine-made sand or stone dust with specifications of 0-2.36 mm; the thickness of the surface layer 32 in the medium-grain steel slag asphalt mixture is 50-70 mm, and the maximum nominal grain diameter is the dense asphalt layer of 19 mm steel slag. Wherein the coarse aggregate adopts steel slag with four specifications of 2.36-4.75 mm, 4.75-9.5 mm, 9.5-16 mm and 16-19 mm, the steel slag ageing time is more than 6 months, and the fine aggregate adopts limestone machine-made sand or stone dust with the specification of 0-2.36 mm; the thickness of the lower layer 33 of the coarse-grain steel slag asphalt mixture is 70-90 mm, the maximum nominal grain diameter is a dense asphalt layer of steel slag with 31.5 mm, wherein the coarse aggregate adopts steel slag with four specifications of 2.36-4.75 mm, 4.75-9.5 mm, 9.5-16 mm and 16-31.5 mm, and the steel slag ageing time is more than 6 months; the fine aggregate adopts limestone machine-made sand or stone dust with the specification of 0-2.36 mm.
Further, the first stable steel slag base layer 40 is at least one of an inorganic binder stable steel slag layer 42 and an asphalt stable steel slag layer 41.
In the present utility model, it may be that the first stable steel slag base layer 40 is an inorganic binder stable steel slag layer 42; the first stable steel slag base layer 40 can also be an asphalt stable steel slag layer 41; it is also possible that the first stable steel slag based layer 40 includes an inorganic binder stable steel slag layer 42 and an asphalt stable steel slag layer 41, wherein the inorganic binder stable steel slag layer 42 is below the asphalt stable steel slag layer 41.
Further, the inorganic binder stabilized slag layer 42 adopts a single-layer structure or a double-layer structure, and the thickness of the layer structure of the inorganic binder stabilized slag layer 42 is 180-220 mm.
Further, the thickness of the asphalt stabilization slag layer 41 is 80 to 140 mm.
In one embodiment of the utility model, the inorganic binder stabilization steel slag layer 42 can be designed into a one-layer structure or a two-layer structure according to traffic load level, and the thickness of each layer is 180-220 mm, wherein the coarse aggregate adopts steel slag with three specifications of 4.75-9.5 mm, 9.5-16 mm and 16-26.5 mm, and the steel slag ageing time is more than 6 months; the fine aggregate adopts stone dust with the specification of 0-4.75 mm. The thickness of the asphalt stabilization steel slag layer 41 is 80-140 mm, wherein the coarse aggregate adopts steel slag with four specifications of 2.36-4.75 mm, 4.75-9.5 mm, 9.5-16 mm and 16-26.5 mm, and the aging time of the steel slag is more than 6 months; the fine aggregate adopts limestone machine-made sand or stone dust with the specification of 0-2.36 mm.
Further, the second stable steel slag subbase layer 50 adopts a low-dose inorganic binder to stabilize the steel slag layer, and the thickness is 180-220 mm. In one embodiment of the utility model, the coarse aggregate of the low-dose inorganic binder stabilized slag layer adopts three specifications of steel slag of 4.75-9.5 mm, 9.5-16 mm and 16-26.5 mm, and the aging time of the steel slag is more than 6 months; the fine aggregate adopts stone dust with the specification of 0-4.75 mm.
Further, slag wear layer 10 and fine grain steelA waterproof adhesive layer 20 is arranged between the upper layers 31 of the slag asphalt mixture. Optionally, the waterproof adhesive layer 20 is non-adhesive wheel modified emulsified asphalt or water-based epoxy asphalt, and more preferably, the sprinkling amount is 1.0-1.2L/m 2 。
Further, an adhesive layer is arranged between the fine-grain type steel slag asphalt mixture upper surface layer 31 and the middle-grain type steel slag asphalt mixture middle surface layer 32, and an adhesive layer is arranged between the middle-grain type steel slag asphalt mixture middle surface layer 32 and the coarse-grain type steel slag asphalt mixture lower surface layer 33; wherein the adhesive layer is a quick-cracking or medium-cracking emulsified asphalt layer or a modified emulsified asphalt layer.
Further, a permeable layer is arranged between the coarse-grain steel slag asphalt mixture lower surface layer 33 and the inorganic binder stabilized steel slag layer 42, and the permeable layer is a slow-cracking emulsified asphalt layer.
As can be appreciated, in the utility model, the steel slag wearing layer 10 is formed by adopting steel slag to lay, the steel slag wearing layer 10 has a uniform skeleton structure and an anti-slip structure, so that the driving safety in rainy days can be improved, the influence of driving noise on drivers and surrounding residents is reduced, and the coarse aggregates in the steel slag wearing layer 10 completely use steel slag to replace natural crushed stone aggregates, so that the ultrathin wearing layer is more wear-resistant, and the engineering construction cost is lower; the coarse aggregates of all structural layers of the pavement from bottom to top are all steel slag, so that the traditional natural aggregates are replaced, the steel slag is recycled in a large scale in the road engineering, a large amount of mine resources are saved, and meanwhile, the land resources occupied by stacking the steel slag are saved, so that the social environmental benefit is remarkable; when the road surface has loose, crack, rapid decay of anti-slip performance and other non-structural diseases, the road surface function can be recovered only by milling and re-paving the steel slag wearing layer 10, compared with the traditional milling and re-paving technology (generally needing to mill and re-paving an asphalt upper surface layer of 40 mm), the cost of the over-high life cycle caused by frequent maintenance of the road surface is effectively reduced, a large amount of milling materials are avoided, and the resource waste is reduced.
The present utility model provides two specific embodiments as follows:
example 1
Referring to fig. 1, an all steel slag pavement structure with a steel slag wearing layer, which is self-containedThe steel slag abrasion layer with the thickness of 15 mm, the fine-grain steel slag asphalt mixture upper layer with the thickness of 40 mm, the middle-grain steel slag asphalt mixture middle layer with the thickness of 60 mm, the coarse-grain steel slag asphalt mixture lower layer with the thickness of 80 mm, the cement stabilized steel slag base layer (inorganic binder stabilized steel slag base layer) with the thickness of 400 mm (inorganic binder stabilized steel slag upper base layer with the thickness of 200 mm and inorganic binder stabilized steel slag lower base layer with the thickness of 200 mm) are arranged from top to bottom; wherein the steel slag abrasion layer comprises 80 parts of steel slag with the specification of 2.36-4.75 mm, 14 parts of stone dust with the specification of 0-2.36 mm, 6.2 parts of SBS modified asphalt, 0.2 part of lignin fiber and 1 part of reinforcing agent, and the reinforcing agent is polyamide resin; wherein the scattering loss of the steel slag abrasion layer Kentaburg is less than or equal to 10%, the dynamic stability is more than or equal to 5000 times/millimeter, the freezing-thawing splitting residual strength ratio is more than or equal to 80%, and the pendulum friction coefficient BPN 20 Not less than 60, the construction depth not less than 0.55 mm, and the water seepage coefficient not more than 80mL/min; wherein the asphalt surface layer comprises 40 mm fine grain type steel slag asphalt mixture AC-13, 60 mm medium grain type steel slag asphalt mixture AC-20 and 80 mm coarse grain type steel slag asphalt mixture AC-25. The fine grain type steel slag asphalt mixture AC-13 and the middle grain type steel slag asphalt mixture AC-20 adopt SBS modified asphalt, and the coarse grain type steel slag asphalt mixture AC-25 adopts 70# road petroleum asphalt. The synthetic grading range of the mixture of each structural layer of the full steel slag type pavement meets the specification of table 1. The volume index of the steel slag asphalt mixture is shown in table 2.
TABLE 1
TABLE 2
Further, the cement doping amounts of the cement stable steel slag base layer and the low-dose cement stable steel slag underlayer are 5.0% and 4.2%, respectively, and the seven-day unconfined compressive strength representative values are 5.7MPa and 4.8MPa, respectively.
Further, the upper layers of the steel slag abrasion layer and the fine-grain steel slag asphalt mixture are provided with waterproof bonding layers, the waterproof bonding layers are non-wheel-sticking modified emulsified asphalt, and the sprinkling amount is 1.1L/m 2 。
Example 2
The difference from example 1 is that the cement stabilized slag base layer comprises an asphalt stabilized slag base layer upper base layer ATB-25 of 100 mm thickness and an inorganic binder stabilized slag base layer lower base layer of 200 mm thickness; wherein; the base layer on the asphalt stabilized steel slag base layer adopts 70# road petroleum asphalt, and the optimal oil-stone ratio is 3.8%. Please refer to table 3 for the mix grading ranges for the asphalt stabilized slag base.
TABLE 3 Table 3
The foregoing description is only of the preferred embodiments of the present utility model, and is not intended to limit the scope of the utility model, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (10)
1. A full steel slag type pavement structure with a steel slag wearing layer is characterized in that,
comprises a steel slag abrasion layer, a waterproof bonding layer, a steel slag asphalt surface layer, a first stable steel slag base layer and a second stable steel slag subbase layer which are sequentially arranged from top to bottom,
the thickness of the steel slag abrasion layer is 10 to 25 mm.
2. The all steel slag road surface structure having a steel slag wear layer of claim 1, wherein the steel slag wear layer has a steel slag maximum nominal particle size of no greater than 4.75 mm.
3. The all-steel slag pavement structure with a steel slag wearing layer according to claim 1, wherein,
the steel slag asphalt surface layer comprises a fine grain steel slag asphalt mixture upper surface layer, a middle grain steel slag asphalt mixture middle surface layer and a coarse grain steel slag asphalt mixture lower surface layer,
the thickness of the upper surface layer of the fine-grain steel slag asphalt mixture is 30-50 mm, the thickness of the middle surface layer of the medium-grain steel slag asphalt mixture is 50-70 mm, and the thickness of the lower surface layer of the coarse-grain steel slag asphalt mixture is 70-90 mm.
4. The all-steel slag pavement structure with a steel slag wearing course as set forth in claim 3, wherein,
the maximum nominal grain size of the steel slag on the upper surface layer of the fine grain type steel slag asphalt mixture, the maximum nominal grain size of the steel slag on the middle surface layer of the medium grain type steel slag asphalt mixture and the maximum nominal grain size of the steel slag on the lower surface layer of the coarse grain type steel slag asphalt mixture are gradually increased.
5. The all-steel slag pavement structure with a steel slag wearing course as set forth in claim 3, wherein,
the maximum nominal grain size of the steel slag on the upper surface layer of the fine-grain steel slag asphalt mixture is not more than 13.2 mm, the maximum nominal grain size of the steel slag on the middle surface layer of the fine-grain steel slag asphalt mixture is not more than 19 mm, and the maximum nominal grain size of the steel slag on the lower surface layer of the coarse-grain steel slag asphalt mixture is not more than 31.5 mm.
6. The all-steel slag pavement structure with a steel slag wearing layer according to claim 1, wherein,
the first stable steel slag base layer is at least one of an inorganic binder stable steel slag layer and an asphalt stable steel slag layer.
7. The all-steel slag pavement structure with a steel slag wearing course as set forth in claim 6, wherein,
the inorganic binder stable steel slag layer adopts a single-layer structure or a double-layer structure, and the thickness of the layer structure of the inorganic binder stable steel slag layer is 180-220 mm.
8. The all-steel slag road surface structure with a steel slag wear layer according to claim 6, wherein the asphalt stabilized steel slag layer has a thickness of 80-140 mm.
9. The all-steel slag pavement structure with a steel slag wearing layer according to claim 1, wherein,
the second stable steel slag subbase layer adopts a low-dose inorganic binder to stabilize a steel slag layer, and the thickness is 180-220 mm.
10. The all-steel slag pavement structure with a steel slag wearing layer according to claim 1, wherein,
the waterproof adhesive layer is a non-adhesive wheel modified emulsified asphalt layer or a water-based epoxy asphalt layer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202322212322.XU CN220685659U (en) | 2023-08-17 | 2023-08-17 | Full steel slag type pavement structure with steel slag wearing layer |
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| CN202322212322.XU CN220685659U (en) | 2023-08-17 | 2023-08-17 | Full steel slag type pavement structure with steel slag wearing layer |
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| CN202322212322.XU Active CN220685659U (en) | 2023-08-17 | 2023-08-17 | Full steel slag type pavement structure with steel slag wearing layer |
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| CN (1) | CN220685659U (en) |
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