CN214245179U - Composite pavement structure based on steel slag asphalt mixture - Google Patents
Composite pavement structure based on steel slag asphalt mixture Download PDFInfo
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- CN214245179U CN214245179U CN202022362496.0U CN202022362496U CN214245179U CN 214245179 U CN214245179 U CN 214245179U CN 202022362496 U CN202022362496 U CN 202022362496U CN 214245179 U CN214245179 U CN 214245179U
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Abstract
The utility model discloses a composite pavement structure based on steel slag and asphalt mixture, which comprises a surface layer, a middle layer, a lower surface layer, a base layer and a roadbed from top to bottom in sequence; the surface layer is a steel slag asphalt concrete layer, and a slurry seal layer is formed on the surface of the steel slag asphalt concrete layer; the middle layer comprises a first steel slag and asphalt mixture layer and a second steel slag and asphalt mixture layer which are arranged in a stacked mode, and the particle size of steel slag particles in the first steel slag and asphalt mixture layer is smaller than that of steel slag particles in the second steel slag and asphalt mixture layer; the lower surface layer is a layer of asphalt mastic and crushed stone mixed material layer, and an adhesive layer is formed between the asphalt mastic and the second steel slag asphalt mixed material layer; the base layer is a cement-stabilized rubble layer, and a third steel slag and asphalt mixed material layer is formed between the lower surface layer and the base layer. The utility model discloses a composite pavement structure can effectively improve the utilization of steel slag as a resource, is applied to highway construction with it, has economic benefits, social and environmental protection benefit concurrently.
Description
Technical Field
The utility model relates to a road engineering technical field, concretely relates to compound road surface structure based on slag bituminous mixture.
Background
In recent years, with the rapid development of the construction of roads and municipal roads in China, the demand of high-quality pavement materials is increasing day by day, the traditional cement concrete pavements and the cement concrete pavements paved on the cement concrete pavements are replaced by asphalt pavements due to the defects of the pavements, and the raw materials of the asphalt pavements in the construction process mainly comprise aggregates (limestone, basalt and the like) and cementing materials (cement, asphalt and the like), wherein the shortage phenomenon of high-quality sandstone aggregates is serious day by day, the price is high, so that the supply quantity of the sandstone aggregates is insufficient, the quality of the sandstone aggregates is reduced, and the search of high-quality substitute materials of natural aggregates or the recycling of old materials is inevitable.
The steel slag produced in the steel-making process has igneous rock characteristics, contains various oxides and mineral substances, has materialized components similar to silicate, presents granular substances with relatively stable performance, higher strength and uniform particles after being subjected to electrolytic hydration under certain environmental conditions (moisture, temperature and medium), has excellent physical and mechanical properties, has more characteristic advantages than natural rocks in the aspects of abrasion resistance, adhesion, grading shape, mechanical properties and the like, and is a very ideal substitute of natural aggregate. At present, the effective utilization rate of steel slag in China is far lower than that of developed countries, the construction of a resource-saving society is not facilitated, the country increases the investment on infrastructure, the highway engineering is developed rapidly, the engineering quantity is increased greatly, the problem of shortage of high-quality aggregates with good wear resistance and adsorbability of an asphalt surface layer of a high-grade highway restricts the continuous healthy development of the highway industry, the craving for new materials and new processes is increased day by day, if the waste steel slag is applied to the construction of the road engineering, the construction cost can be reduced, and the performances of skid resistance, rutting resistance, durability and the like of a road surface can be improved, so that the steel slag is used for replacing a natural mineral material to prepare asphalt concrete, the steel slag has obvious advantages for improving the driving safety of the road, and meanwhile, remarkable economic, resource and environmental protection benefits can be brought.
The application of the steel slag in the highway engineering relates to steel slag physicochemical properties and the adaptability evaluation thereof in the road engineering, steel slag mixture proportion design and the road performance evaluation thereof, a steel slag mixture construction process and the like, the common steel slag asphalt composite road surface in the prior art has the problems of unreasonable design, short service life, poor wear resistance, high running noise of an automobile on the road surface, more edges and corners of a finished product, poor asphalt wrapping adhesion and easy failure, and the road surface structure of the automobile needs to be improved.
SUMMERY OF THE UTILITY MODEL
The technical problem solved by the utility model is to provide a composite pavement structure based on steel slag asphalt mixture to solve the defects in the technical background.
The utility model provides a technical problem adopt following technical scheme to realize:
a composite pavement structure based on a steel slag asphalt mixture sequentially comprises a surface layer, an intermediate layer, a lower surface layer, a base layer and a roadbed from top to bottom; the surface layer is a steel slag asphalt concrete layer, and slurry sealing is carried out on the surface of the steel slag asphalt concrete layer through emulsified asphalt slurry; the middle layer comprises a first steel slag and asphalt mixture layer and a second steel slag and asphalt mixture layer, the first steel slag and asphalt mixture layer and the second steel slag and asphalt mixture layer are arranged in a vertically stacked mode and are formed independently, and the particle size of steel slag particles in the first steel slag and asphalt mixture layer is smaller than that of steel slag particles in the second steel slag and asphalt mixture layer; the lower surface layer is a mixed material layer of asphalt mastic and macadam, and an adhesive layer is formed between the middle layer and the lower surface layer; the base layer is a cement-stabilized rubble layer, and a third steel slag and asphalt mixed material layer is formed between the lower surface layer and the base layer.
As a further limitation, the roadbed is formed by stirring, compacting, laying and molding soil on site.
And a steel slag gravel layer with the thickness of 20-30 cm is filled between the roadbed and the base layer to serve as a cushion layer.
As a further limitation, the thickness of the surface layer is 3-4 cm.
As a further limitation, the particle size of the steel slag particles in the first steel slag asphalt mixture layer is 5-10 mm; the particle size of steel slag particles in the second steel slag and asphalt mixed material layer is 10-15 mm.
By way of further limitation, the thickness of the first steel slag and asphalt mixture layer is 6-10 cm, and the thickness of the second steel slag and asphalt mixture layer is 8-15 cm.
As a further limitation, an OGFC (one glass solution carbon) layer with the thickness of 3-5 cm can be formed between the second steel slag and asphalt mixture layer and the emulsified asphalt layer so as to improve the drainage performance of the asphalt pavement.
By way of further limitation, the cement used in the cement stabilized gravel layer of the base layer is portland cement or ordinary portland cement designated by reference numeral 32.5 or 42.5.
Has the advantages that: the composite pavement structure based on the steel slag and asphalt mixture uses the waste steel slag as a roadbed treatment material, can effectively improve the application proportion of the waste steel slag in asphalt pavement laying, reduces the application of traditional stone aggregate, can realize the recycling of waste materials, can effectively reduce the construction cost of asphalt pavement, and has very obvious economic benefit and environmental protection benefit;
this composite pavement makes the composite pavement after the shaping have intensity height, wear-resisting, fall make an uproar, the finished product is regular, the good advantage of pitch parcel adhesion through rationally setting up interlaminar structure, can effectively improve the bearing capacity of road bed simultaneously, is favorable to maintaining the long-term performance of road.
Drawings
Fig. 1 is a schematic structural diagram of a preferred embodiment of the present invention.
Wherein: 1. slurry sealing; 2. a surface layer; 3. a first steel slag and asphalt mixture layer; 4. a second steel slag and asphalt mixture layer; 5. an OGFC layer; 6. an adhesive layer; 7. a lower layer; 8. a third steel slag and asphalt mixed material layer; 9. a base layer; 10. a cushion layer; 11. and (7) roadbed.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand and understand, the present invention is further explained by combining with the specific drawings.
Referring to fig. 1, a preferred embodiment of a composite pavement structure based on a steel slag asphalt mixture, in this embodiment, the composite pavement structure based on a steel slag asphalt mixture comprises a roadbed 11 as a base layer, the roadbed 11 is formed by stirring, compacting and laying soil on site, a cushion layer 10 with a thickness of 25cm is formed on the roadbed 11, and the cushion layer 10 is a steel slag gravel layer. A base layer 9 is formed on the cushion layer 10, in the embodiment, the base layer 9 is a cement-stabilized gravel layer with the thickness of 50cm, and the cement which can be used in the base layer 9 is Portland cement or ordinary Portland cement with the reference number of 32.5 or 42.5; in this example, Portland cement, reference numeral 42.5, was used. The subgrade 11, the underlayment 10 and the base course 9 together serve as an underlying load bearing and support structure for the roadway.
A third steel slag and asphalt mixture layer 8 is formed on the base layer 9, the thickness of the third steel slag and asphalt mixture layer 8 is 9cm, the particle size of the adopted steel slag particles is 10-20 mm, the third steel slag and asphalt mixture layer 8 serves as a lower buffer structure layer, the elasticity and the ductility of the pavement structure can be kept in the middle layer space of the pavement structure, a lower layer 7 is formed on the third steel slag and asphalt mixture layer, an adhesive layer 6 and an OGFC layer 5 are sequentially formed on the lower layer 7, and in the embodiment, the adhesive layer 6 is an emulsified asphalt layer with the thickness of 3 cm; and the OGFC layer 5 has a thickness of 4 cm. The adhesive layer 6 can effectively prevent interlayer peeling; and the OGFC layer 5 can be used to improve the drainage performance of the asphalt pavement.
An intermediate layer and a surface layer 2 are formed on the OGFC layer 5, the intermediate layer comprises a first steel slag and asphalt mixture layer 3 with the thickness of 8cm and a second steel slag and asphalt mixture layer 4 with the thickness of 10cm, wherein the particle size of steel slag particles in the first steel slag and asphalt mixture layer 3 is 5-10 mm, and the particle size of steel slag particles in the second steel slag and asphalt mixture layer 4 is 10-15 mm; the middle layer composed of the first steel slag asphalt mixture layer 3 and the second steel slag asphalt mixture layer 4 is used as a main functional layer and can resist certain thermal expansion and cold contraction of the pavement and impact force and shearing force caused by the pavement after being pressed, so that the generation of pavement cracks is reduced, and the service life of the pavement is prolonged; and the combination of the first steel slag and asphalt mixture layer 3, the second steel slag and asphalt mixture layer 4 and the third steel slag and asphalt mixture layer 8 can also improve the bearing capacity of the roadbed.
In this embodiment, the surface layer 2 is a steel slag asphalt concrete layer with a thickness of 3cm, which has better buffering and impact resistance, and the middle layer is matched to effectively reduce the tire noise of the vehicle passing through, and the slurry seal layer 1 formed on the surface layer 2 and formed by emulsified asphalt slurry can be combined with the surface layer 2 to form a compact, firm and wear-resistant road surface seal layer, so that the service performance of the road surface is greatly improved, and the maintenance performance of the surface layer 2 is improved.
The foregoing is a more detailed description of the present invention that is presented in conjunction with specific embodiments, and it is not to be understood that the specific embodiments of the present invention are limited to these descriptions. To the utility model belongs to the technical field of ordinary technical personnel, under the prerequisite that does not deviate from the utility model discloses the design, can also make a plurality of simple deductions or replacement, these all should regard as belonging to the utility model discloses a protection scope.
Claims (5)
1. A composite pavement structure based on a steel slag asphalt mixture is characterized by sequentially comprising a surface layer, an intermediate layer, a lower surface layer, a base layer and a roadbed from top to bottom; the surface layer is a steel slag asphalt concrete layer, and an emulsified asphalt slurry seal layer is formed on the surface of the steel slag asphalt concrete layer; the middle layer comprises a first steel slag and asphalt mixture layer and a second steel slag and asphalt mixture layer, the first steel slag and asphalt mixture layer and the second steel slag and asphalt mixture layer are arranged in a vertically stacked mode and are formed independently, and the particle size of steel slag particles in the first steel slag and asphalt mixture layer is smaller than that of steel slag particles in the second steel slag and asphalt mixture layer; the lower surface layer is a mixed material layer of asphalt mastic and macadam, and an adhesive layer is formed between the middle layer and the lower surface layer; the base layer is a cement-stabilized rubble layer, and a third steel slag and asphalt mixed material layer is formed between the lower surface layer and the base layer.
2. The composite pavement structure based on the steel slag asphalt mixture as claimed in claim 1, wherein the roadbed is formed by stirring, compacting, laying and forming soil on site.
3. The composite pavement structure based on the steel slag asphalt mixture according to claim 1, wherein the thickness of the surface layer is 3-4 cm.
4. The composite pavement structure based on steel slag asphalt mixture according to claim 1, wherein the adhesive layer is an emulsified asphalt layer.
5. The composite pavement structure based on the steel slag asphalt mixture according to claim 1, wherein the thickness of the first steel slag asphalt mixture layer is 6-10 cm; the thickness of the second steel slag and asphalt mixed material layer is 8-15 cm.
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| CN202022362496.0U CN214245179U (en) | 2020-10-22 | 2020-10-22 | Composite pavement structure based on steel slag asphalt mixture |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113863082A (en) * | 2021-10-11 | 2021-12-31 | 上海市政工程设计研究总院（集团）有限公司 | BRT station heavy-load traffic road section paving structure and construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113863082A (en) * | 2021-10-11 | 2021-12-31 | 上海市政工程设计研究总院（集团）有限公司 | BRT station heavy-load traffic road section paving structure and construction method |
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