CN217419177U - All-steel-slag rigid pavement structure - Google Patents
All-steel-slag rigid pavement structure Download PDFInfo
- Publication number
- CN217419177U CN217419177U CN202220918152.XU CN202220918152U CN217419177U CN 217419177 U CN217419177 U CN 217419177U CN 202220918152 U CN202220918152 U CN 202220918152U CN 217419177 U CN217419177 U CN 217419177U
- Authority
- CN
- China
- Prior art keywords
- steel slag
- slag
- layer
- stabilized
- cement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Road Paving Structures (AREA)
Abstract
The utility model discloses a full steel slag rigidity road surface structure, this road surface structure from top to bottom stack gradually and set up surface course and basic unit, the gathering materials that the basic unit adopted are the slag, the basic unit stabilizes slag or organic binder stabilization slag or aggregate slag for slag concrete or inorganic binder, the surface course is slag cement concrete slab layer, slag cement concrete slab layer adopts the slag to form for slag cement concrete or the slag reinforcement cement concrete pavement that gathers materials, or adopts the installation of prefabricated slag concrete slab to form. The all-steel slag rigid pavement structure has the following advantages: (1) the industrial waste steel slag generated by steel making is recycled for pavement paving, so that the environmental pollution and land occupation caused by steel slag disposal are relieved. (2) The steel slag has the advantages of high strength, high hardness and high wear resistance, and can raise the durability of road and the running safety of vehicle. (3) Reduces the exploitation of natural primary stone materials and has good ecological, social and economic benefits.
Description
Technical Field
The utility model relates to a road surface structure, concretely relates to all-steel slag rigidity road surface structure.
Background
The rigid pavement generally refers to a cement concrete pavement, has the characteristics of high strength, good stability, low maintenance cost, low transportation cost and good fire resistance, and is one of the most widely applied pavement structures in China. In recent years, with the rapid development of the transportation industry, the construction level and technology of road engineering in China are continuously improved, and the quality benefit, resource accumulation and environmental protection of engineering construction are more and more emphasized. Meanwhile, the aggregate is used as a main raw material for road surface construction, and the demand and the production amount of the aggregate are still high and are gradually deficient. Under the background, the waste materials are used for replacing the primary sandstone resources and are used as aggregates for paving the rigid pavement, so that the problems of excessive exploitation of the stones (such as basalt) and environmental pollution caused by the waste materials are favorably solved, and the development requirement of the 'strong traffic country' is met.
The byproduct steel slag generated in the steel making process is used as a high-quality environment-friendly road aggregate, the generation rate of the aggregate is 8-15% of the yield of the crude steel, but the aggregate is not efficiently utilized in China at present. According to statistics, the steel slag which is not effectively utilized in China currently exceeds 30 hundred million tons, the slag discharge amount is increased by nearly 2 hundred million tons every year, the environment is seriously polluted, and a large amount of land is occupied by discarding waste slag. If the steel slag is used for replacing all aggregates adopted in the traditional cement concrete pavement, the aim of large-dosage, large-scale and high-valued utilization is realized, the utilization efficiency of the steel slag can be greatly improved, the recycling of solid waste resources is promoted, the pollution and the occupied area caused by steel slag stacking are reduced, the economic and social ecological benefits are extremely high, and the call of carbon peak reaching and carbon neutralization is responded.
In addition, the steel slag has rough and porous surface morphology and has the characteristics of high strength, high hardness and high wear resistance in mechanics, and the cast concrete slab has the characteristics of high strength, high hardness, high freeze-thaw resistance, high impermeability and high wear resistance, so that the durability of the pavement and the safety of vehicle driving can be obviously improved. Therefore, the utility model provides an all-steel slag rigid pavement structure has also guaranteed good road surface performance when having satisfied "intensive circulation of resource, environmental protection", "the action of carbon falls in the circular economy helping hand".
Chinese patent publication No. CN205874884U, published 2017, 1 month and 11 days, discloses a steel slag permeable pavement structure, which is arranged on a roadbed and sequentially comprises, from top to bottom: the siphon-type building floor comprises a surface layer formed by mixing and curing steel slag with the granularity of 0.1-2mm through an adhesive, a base layer formed by mixing and curing aggregate with the granularity of 2-15mm through the adhesive, a cushion layer formed by mixing and curing aggregate with the granularity of 2-30mm through the adhesive, and a siphon connecting layer formed by mixing and tamping the steel slag with the granularity of 2-15mm and plain soil. The structure focuses on enhancing the water permeability of the pavement, the stripping resistance, the ageing resistance, the cracking resistance and the impact resistance of the adopted adhesive condensate are far lower than those of cement concrete, the surface layer strength of the structure is far lower than that of a cement concrete surface layer, and the requirements of large traffic volume and heavy-load vehicle driving are difficult to meet. And the steel slag aggregate is only used in the surface layer and the siphon connecting layer, so that the recycling efficiency of the waste steel slag is limited, the natural aggregate still has great demand, and the aim of 'large-dosage, large-scale and high-value utilization of a large amount of solid wastes' is not achieved.
Chinese patent publication No. CN213836134U, published 2021, 7/30, discloses a composite solid-waste full-thickness roadbed pavement structure, which comprises an upper surface layer, a middle surface layer, a lower surface layer, a base layer, a sub-base layer, a cushion layer and a roadbed from top to bottom in sequence, wherein the upper surface layer, the middle surface layer and the lower surface layer are steel slag recycled asphalt mixture layers, and the base layer and the sub-base layer are steel slag cement stabilized gravel layers, the cushion layer is a steel slag-mixed gravel layer, and the roadbed is a steel slag roadbed. The structure belongs to a flexible pavement structure, the durability and the flame retardance of the structure are inferior to those of a rigid pavement structure, and the temperature sensitivity is high, so that the structure is not suitable for being applied to areas with large temperature difference, tunnels and other environments with high fire resistance requirements, and the requirements of large traffic volume and heavy-load vehicle driving are difficult to meet. The upper surface layer, the middle surface layer, the lower surface layer, the base layer, the subbase layer and the cushion layer of the structure are partially made of steel slag as aggregate, and the aim that all aggregate is made of steel slag is not achieved. The adopted recycled asphalt mixture has higher requirements on production and processing equipment and more complex construction process.
Chinese patent publication No. CN209397458U, published 2019, 9, 17, discloses a composite permeable pavement structure combining a flexible permeable surface layer and a rigid permeable base layer, comprising a permeable asphalt concrete surface layer, an emulsified asphalt or hot asphalt bonding layer, a steel slag permeable concrete base layer, graded broken stones, single-particle-size steel slag or graded steel slag subbase layer, which are sequentially arranged from top to bottom. This road surface structure is the same actively adoption and is wasted solid regeneration and gather materials, is used for cement concrete basic unit or aggregate subbottom with the slag, but it does not belong to full slag road surface structure, and its technical target is quick discharge surface ponding, with the utility model discloses a there is the difference in full slag road surface structure. In addition, the application condition and the structural characteristic of the asphalt concrete surface course that it adopted also with the utility model provides a cement concrete rigidity surface course has great difference.
Chinese patent publication No. CN213142683U, published 2021, 5.7.5.7 discloses a composite pavement structure of a flexible flame-retardant permeable surface layer and a rigid flame-retardant permeable base layer, which sequentially comprises, from top to bottom, a flexible flame-retardant permeable surface layer, an adhesive layer, a rigid flame-retardant permeable base layer, a sub-base layer and a roadbed. The rigid flame-retardant permeable base layer is made of flame-retardant permeable cement concrete, and the subbase layer is made of graded steel slag layer or graded crushed stone layer or graded gravel layer or graded sand gravel layer. The technical problem that this road surface structure will be solved emphatically the fire behaviour and the water permeability of road surface structure, and the utility model provides a technical effect that full steel slag rigidity road surface structure finally reaches is for gathering materials the complete replacement of adopting with ordinary rigidity road surface structure for the slag gathers materials, improves road surface structure's road performance and durability simultaneously with this, therefore both have great difference.
SUMMERY OF THE UTILITY MODEL
Based on the problem among the above-mentioned prior art, the utility model provides a full steel slag rigidity road surface structure, aim at promote rigidity road surface structural performance to the reduction promotes the cyclic utilization of slag resource to the exploitation and the use of natural grit resource, thereby realizes road engineering's green intensification development.
In order to realize the purpose, the utility model discloses a realize through following technical scheme: the utility model provides an all-steel slag rigid pavement structure, pavement structure arranges on the road bed, from top to bottom stacks gradually and sets up surface course and basic unit, the aggregate that the basic unit adopted is the slag, the basic unit is slag concrete or inorganic binder stabilization slag or organic binder stabilization slag or aggregate slag, the surface course is slag cement concrete slab layer, slag cement concrete slab layer adopts slag cement concrete or slag arrangement of reinforcement cement concrete that the slag is aggregate to pave and forms, or adopts prefabricated slag concrete slab to install and form, and thickness is 10 ~ 30cm, and compressive strength is more than or equal to 40MPa, and bending tensile strength is more than or equal to 5.0 MPa.
The utility model discloses a further improvement, slag concrete or inorganic binder stabilized steel slag or aggregate slag thickness are 10 ~ 40cm, when slag concrete is slag cement concrete, compressive strength is greater than or equal to 30MPa, and bending tensile strength is greater than or equal to 4.0MPa, when inorganic binder stabilized steel slag is cement stabilized steel slag, unconfined compressive strength is greater than or equal to 4.0MPa, when inorganic binder stabilized steel slag is cement fly ash stabilized steel slag, unconfined compressive strength is greater than or equal to 3.0MPa, when aggregate slag is lime fly ash stabilized steel slag basic unit, unconfined compressive strength is greater than or equal to 1.0 MPa.
The utility model discloses a further improvement, the steel slag basic unit thickness is stabilized to the organic binder is 3 ~ 10cm, comprises at least one of steel slag asphalt concrete, the rubble is stabilized to the steel slag pitch.
The utility model discloses a further improvement, set up the subbase under the basic unit, the subbase is the stable slag of inorganic binder or aggregate steel slag, the stable slag of inorganic binder or aggregate steel slag subbase layer thickness are 10 ~ 40cm, and when adopting cement to stabilize the slag subbase, its no confined compressive strength is greater than or equal to 3.0MPa, and when adopting cement fly ash to stabilize the slag subbase, its no confined compressive strength is greater than or equal to 2.0MPa, and when adopting lime fly ash to stabilize the slag subbase, its no confined compressive strength is greater than or equal to 1.0MPa, what the subbase adopted gathers materials is the slag.
The utility model discloses a further improvement, set up the slag bed course under the basic unit, slag bed course thickness is 10 ~ 30 cm.
The utility model discloses a further improvement, set up the slag bed course under the subbase, slag bed course thickness is 10 ~ 30 cm.
The utility model provides a full steel slag rigidity road surface structure compares with prior art and has following beneficial effect and advantage at least:
on one hand, the utility model adopts the by-product steel slag generated in steel making to replace stone materials in the traditional cement concrete rigid pavement structure, thereby greatly reducing the demand for primary sand stone materials, reducing the over-exploitation of high-quality natural aggregate and realizing the high-efficiency cyclic utilization of waste resources; on the other hand, the steel slag, which is an industrial waste, is recycled, thereby being beneficial to reducing the pollution to the environment and the waste to land resources; in addition, the special shape, size and rough surface texture of the steel slag aggregate can ensure that the steel slag aggregate has better adhesion with a cement matrix, thereby obtaining better overall strength of cement concrete; in an alkaline environment, active ingredients in the steel slag can react with water to generate calcium silicate hydrate, calcium aluminate hydrate and ettringite, and can promote the increase of the compressive strength and the flexural strength of concrete; the steel slag has the advantages of high strength, high hardness and high wear resistance, the cement consumption can be saved, and the poured concrete slab has the characteristics of high strength, high hardness, high freeze-thaw resistance, high impermeability and high wear resistance, and can improve the durability of the road and the safety of vehicle running. Has good environmental effect, economic effect and social effect.
Description of the drawings:
the present invention will be described more clearly and more easily with reference to the accompanying drawings, which are given by way of illustration only and are not limiting of the present invention, and in which:
FIG. 1 is a schematic cross-sectional view of an all-steel slag rigid pavement structure in embodiment 1 of the present invention;
fig. 2 is a schematic cross-sectional view of an all-steel slag rigid pavement structure according to embodiments 2 and 3 of the present invention;
fig. 3 is a schematic cross-sectional view of a full-steel-slag rigid pavement structure in embodiment 4 of the present invention.
Detailed Description
The present invention will be further described with reference to the following detailed description.
The utility model provides an all-steel slag rigidity road surface structure, this structure uses the slag to replace gathering materials of adopting in traditional cement concrete road surface structure completely, not only can keep the intensity that rigidity road surface structure itself possessed high, advantages such as durability is good, can solve the slag moreover and abandon in a large number and occupy the problem of land and polluted environment, reduce the exploitation of natural building stones, realize industrial waste residue cyclic recycle, thereby reduce road surface construction cost, do benefit to the strong country of traffic construction that promotes green intensive, low carbon environmental protection.
Example 1
Referring to fig. 1, the all-steel slag rigid pavement structure comprises a steel slag ordinary cement concrete slab surface layer 1, a cement-stabilized steel slag base layer 2 and a steel slag cushion layer 3 which are sequentially stacked from top to bottom, wherein a petroleum asphalt adhesive layer is spread between the steel slag cement concrete slab surface layer 1 and the cement-stabilized steel slag base layer 2. The steel slag cement concrete slab surface layer is 20cm thick, the cement-stabilized steel slag base layer is 30cm thick, the steel slag cushion layer is 15cm thick, the roadbed is composed of steel slag and sandy soil, the modulus of resilience is larger than or equal to 40MPa, the California bearing ratio CBR of the roadbed is larger than or equal to 70%, the CBR of the upper embankment is larger than or equal to 60%, and the CBR of the lower embankment is larger than or equal to 50%.
Furthermore, the steel slag cement concrete slab surface layer is formed by paving cement concrete with steel slag as aggregate, the steel slag cement concrete is formed by mixing P.O 42.5-grade ordinary portland cement, tap water, a polycarboxylic acid high-efficiency water reducing agent containing an anionic surfactant, steel slag aggregate and steel slag sand, the water-cement ratio is 0.35, and the ash collection ratio is 4.0. The nominal maximum grain size of the steel slag aggregate is 19 mm. After 28 days of curing, the compressive strength of the steel slag cement concrete surface layer plate is more than or equal to 50MPa, and the bending tensile strength is more than or equal to 5.0 MPa. In order to prevent the steel slag cement concrete surface layer plate from generating temperature stress due to temperature gradient or temperature change and further causing cracking, expansion joints are arranged on the surface layer plate at intervals of 18m, the joint width is 20mm, and a flexible material rubber foam plate is selected for joint filling. The spacing of the longitudinal shrinkage cracks is set to be 3.5 meters, so that irregular cracks are avoided when the steel slag cement concrete slab shrinks.
Furthermore, the unconfined compressive strength of the cement-stabilized steel slag base layer is not less than 4.5MPa, the aggregates adopted by the cement-stabilized steel slag are steel slag, the cement mixing amount is 5.5%, and the aggregate grading composition of the cement-stabilized steel slag base layer is shown in the following table 1.
Furthermore, the compactness of the steel slag cushion layer is more than or equal to 93 percent, and the deflection value of the roadbed is less than or equal to 250(0.01 mm).
Further, the steel slag technical properties of the steel slag cement concrete slab surface layer, the cement-stabilized steel slag base layer, the steel slag cushion layer and the roadbed filling are shown in the following table 2.
Furthermore, the spreading amount of the petroleum asphalt sticky layer between the steel slag cement concrete slab surface layer and the cement-stabilized steel slag base layer is 0.3L/m 2 。
Example 2
Referring to fig. 2, the all-steel slag rigid pavement structure comprises a continuous reinforced steel slag cement concrete surface layer 1, a lime fly ash stabilized steel slag base layer 2, a lime fly ash stabilized steel slag sub-base layer 3 and a steel slag cushion layer 4 which are sequentially stacked from top to bottom, wherein an oil asphalt adhesive layer is spread between the continuous reinforced steel slag cement concrete surface layer 1 and the lime fly ash stabilized steel slag base layer 2. The continuous reinforcing steel slag cement concrete slab surface layer is 15cm thick, the lime fly ash stabilized steel slag base layer is 30cm thick, the lime fly ash stabilized steel slag subbase layer is 20cm thick, the steel slag cushion layer is 20cm thick, the roadbed is composed of steel slag broken stones, the California bearing ratio CBR of the roadbed is more than or equal to 70%, the CBR of the upper embankment is more than or equal to 60%, and the CBR of the lower embankment is more than or equal to 50%.
Furthermore, the surface layer of the continuous reinforced steel slag cement concrete slab adopts steel slag as aggregate, the steel slag cement concrete is formed by mixing P.O 42.5 grade ordinary portland cement, tap water, a polycarboxylic acid high-efficiency water reducing agent containing an anionic surfactant, steel slag aggregate and steel slag sand, the water-cement ratio is 0.35, the ash collection ratio is 4.0, and the nominal maximum particle size of the steel slag aggregate is 19 mm. After 28-day curing, the compressive strength of the steel slag cement concrete surface laminate is more than or equal to 50MPa, and the bending tensile strength is more than or equal to 5.0 MPa. Due to the configuration of continuous reinforcement, the surface plate is not provided with a transverse expansion joint and a contraction joint, and the longitudinal and transverse reinforcements of the continuous reinforcement steel slag cement concrete surface layer adopt twisted reinforcements with the diameter of 12mm and are arranged in the thickness range of 5-7 cm below the top surface of the surface layer.
Furthermore, the unconfined compressive strength of the lime fly ash stabilized steel slag base layer is not less than 1.5MPa, the unconfined compressive strength of the lime fly ash stabilized steel slag base layer is not less than 1.0MPa, aggregate adopted by the lime fly ash stabilized steel slag is steel slag, and the mass ratio of the steel slag, lime and fly ash is 70: 7: 23, the maximum dry density of the mixture is 2300kg/m 3 The optimum water content is 7%.
Furthermore, the compactness of the steel slag cushion layer is more than or equal to 93 percent, and the deflection value of the roadbed is less than or equal to 250(0.01 mm).
Furthermore, the technical properties of the steel slag adopted by the continuous reinforced steel slag cement concrete slab surface layer, the lime fly ash stabilized steel slag base layer and the subbase layer, the steel slag cushion layer and the roadbed filling are shown in table 2.
Furthermore, the spreading amount of the petroleum asphalt sticky layer between the continuous reinforced steel slag cement concrete slab surface layer and the lime fly ash stabilized steel slag base layer is 0.4L/m 2 。
Example 3
Referring to fig. 2, an all-steel slag rigid pavement structure comprises, from top to bottom, a steel slag concrete slab surface layer 1, a cement-stabilized steel slag base layer 2, a cement-stabilized steel slag sub-base layer 3 and a steel slag cushion layer 4 which are prefabricated and installed, wherein a petroleum asphalt adhesion layer is spread between the steel slag concrete slab surface layer 1 and the cement-stabilized steel slag base layer 2. The steel slag cement concrete slab surface layer is 30cm thick, the cement-stabilized steel slag base layer is 15cm thick, the cement-stabilized steel slag subbase layer is 10cm thick, the steel slag cushion layer is 10cm thick, the roadbed is composed of steel slag, sandy soil and clay, the resilience modulus is larger than or equal to 40MPa, the California bearing ratio CBR of the roadbed is larger than or equal to 70%, the CBR of the upper embankment is larger than or equal to 60%, and the CBR of the lower embankment is larger than or equal to 50%.
Furthermore, the length of the prefabricated steel slag cement concrete plate is controlled to be 5m, the width of the prefabricated steel slag cement concrete plate is controlled to be 3m, a double-layer reinforcing mesh with the diameter of 12mm is arranged in the prefabricated plate to ensure the safety during transportation and construction and the anti-cracking capacity during the use process of a road surface, the prefabricated steel slag cement concrete plate is formed by mixing P.O 42.5-grade ordinary portland cement, tap water, a polycarboxylic acid high-efficiency water reducing agent containing an anionic surfactant, steel slag aggregates and steel slag sand, the water cement ratio is 0.45, the nominal maximum grain size of the steel slag aggregates is 19mm, the compressive strength of the steel slag cement concrete plate is not less than 50MPa after maintenance, and the bending tensile strength of the steel slag cement concrete plate is not less than 5.0 MPa. In order to effectively transfer the load between the prefabricated plates, a dowel bar is arranged between two adjacent longitudinal plates. Thereby enhancing the stressed integrity of the pavement structure.
Furthermore, the unconfined compressive strength of the cement-stabilized steel slag base layer is not less than 5.0MPa, the unconfined compressive strength of the cement-stabilized steel slag subbase layer is not less than 4.0MPa, the aggregates adopted by the cement-stabilized steel slag are steel slag, the cement mixing amount is respectively 6% and 5%, and the aggregate grading composition of the cement-stabilized steel slag base layer and the subbase layer is shown in Table 1.
TABLE 1 grading requirements for cement stabilized steel slags
Furthermore, the compactness of the steel slag cushion layer is more than or equal to 93 percent, and the deflection value of the roadbed is less than or equal to 250(0.01 mm).
Furthermore, the steel slag technical performance of the steel slag cement concrete slab surface layer, the cement-stabilized steel slag base layer and subbase layer, the steel slag cushion layer and the roadbed filling material is shown in table 2.
Furthermore, grouting treatment is carried out between the surface layer of the prefabricated steel slag cement concrete slab and the cement-stabilized steel slag base layer so as to fill a cavity generated due to the fact that the bottom of the surface layer plate or the top of the base layer is not flat, the phenomenon that the bottom of the plate is hollowed is avoided, the service performance of the steel slag cement concrete slab is guaranteed, high-strength cement-based grouting materials are adopted as grouting materials, the water cement ratio of the grouting materials is 0.3, and during grouting, the grouting materials are injected through four corners of the prefabricated steel slag cement concrete slab and reserved holes, so that the surface layer plate and the lower bearing layer are fully connected, and good integrity is obtained.
Example 4
Referring to fig. 3, the all-steel slag rigid pavement structure comprises a continuous reinforced steel slag cement concrete surface layer 1, an asphalt stabilized steel slag macadam base layer 2, a cement stabilized steel slag sub-base layer 3 and a steel slag cushion layer 4 which are sequentially stacked from top to bottom. The continuous reinforcing steel slag cement concrete slab surface layer is 15cm in thickness, the asphalt-stabilized steel slag broken stone base layer is 10cm in thickness, the cement-stabilized steel slag subbase layer is 20cm in thickness, the steel slag cushion layer is 10cm in thickness, the roadbed is composed of steel slag broken stones, the California bearing ratio CBR of the roadbed is more than or equal to 70%, the CBR of the upper embankment is more than or equal to 60%, and the CBR of the lower embankment is more than or equal to 50%.
Furthermore, the surface layer of the continuous reinforced steel slag cement concrete slab adopts steel slag as aggregate, the steel slag cement concrete is formed by mixing P.O 42.5 grade ordinary portland cement, tap water, a polycarboxylic acid high-efficiency water reducing agent containing an anionic surfactant, steel slag aggregate and steel slag sand, the water-cement ratio is 0.35, the ash collection ratio is 4.0, and the nominal maximum particle size of the steel slag aggregate is 19 mm. After 28-day curing, the compressive strength of the steel slag cement concrete surface laminate is more than or equal to 50MPa, and the bending tensile strength is more than or equal to 5.0 MPa. The longitudinal and transverse reinforcing steel bars of the continuous reinforcement steel slag cement concrete surface layer are twisted steel bars with the diameter of 12mm and are arranged in the thickness range of 5-7 cm below the top surface of the surface layer.
Furthermore, the asphalt stabilized steel slag crushed stone adopts an ATB-25 grading type, the optimal oil-stone ratio is 3.6%, and aggregate adopted by the asphalt stabilized steel slag crushed stone is steel slag. The unconfined compressive strength of the cement stabilized steel slag subbase layer is not less than 4.0MPa, the aggregate adopted by the cement stabilized steel slag is steel slag, the cement mixing amount is 5%, and the aggregate grading composition is shown in the following table 1.
Furthermore, the compactness of the steel slag cushion layer is more than or equal to 93 percent, and the deflection value of the roadbed is less than or equal to 250(0.01 mm).
Furthermore, the steel slag technical performance of the continuous reinforcement steel slag cement concrete slab surface layer, the asphalt stabilized steel slag crushed stone base layer, the cement stabilized steel slag subbase layer, the steel slag cushion layer and the roadbed filler are shown in table 2.
TABLE 2 technical requirements of the steel slag aggregates
The utility model discloses in the more optimized scheme, can be according to each road surface structure layer thickness of the big or small reasonable adjustment of highway grade or traffic volume. The above embodiments are only intended to illustrate the features and advantages of the present invention, and are not intended to limit the present invention in any way to other embodiments, and any modifications or equivalent changes made in accordance with the technical spirit of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. The utility model provides an all-steel slag rigid pavement structure, pavement structure arranges on the road bed, and this pavement structure stacks gradually setting up surface course and basic unit, its characterized in that from top to bottom: the base layer is made of aggregate which is steel slag, the base layer is made of steel slag concrete or inorganic binder stable steel slag or organic binder stable steel slag or aggregate steel slag, the surface layer is a steel slag cement concrete slab layer, the steel slag cement concrete slab layer is formed by paving steel slag cement concrete or steel slag reinforced cement concrete which takes steel slag as aggregate, or is formed by installing prefabricated steel slag concrete slabs, the thickness is 10-30 cm, the compressive strength is larger than or equal to 40MPa, and the bending tensile strength is larger than or equal to 5.0 MPa.
2. An all-steel slag rigid pavement structure according to claim 1, characterized in that: the thickness of the steel slag concrete or the inorganic binding material stabilized steel slag or the granular steel slag is 10-40 cm, when the steel slag concrete is steel slag cement concrete, the compressive strength is not less than 30MPa, the bending tensile strength is not less than 4.0MPa, when the inorganic binding material stabilized steel slag is cement stabilized steel slag, the unconfined compressive strength is not less than 4.0MPa, when the inorganic binding material stabilized steel slag is cement fly ash stabilized steel slag, the unconfined compressive strength is not less than 3.0MPa, and when the granular steel slag is a lime fly ash stabilized steel slag base layer, the unconfined compressive strength is not less than 1.0 MPa.
3. The all-steel slag rigid pavement structure according to claim 1, characterized in that: the organic binder stabilized steel slag base layer is 3-10 cm thick and is composed of at least one of steel slag asphalt concrete and steel slag asphalt stabilized macadam.
4. The all-steel slag rigid pavement structure as claimed in claim 2 or 3, wherein a subbase layer is arranged under the base layer, the subbase layer is made of inorganic binder stabilized steel slag or granular steel slag, the thickness of the subbase layer is 10-40 cm, when the cement stabilized steel slag subbase layer is adopted, the unconfined compressive strength is not less than 3.0MPa, when the cement fly ash stabilized steel slag subbase layer is adopted, the unconfined compressive strength is not less than 2.0MPa, when the lime fly ash stabilized steel slag subbase layer is adopted, the unconfined compressive strength is not less than 1.0MPa, and the aggregate adopted by the subbase layer is steel slag.
5. The all-steel slag rigid pavement structure of claim 2 or 3, wherein a steel slag cushion layer is arranged under the base layer, and the thickness of the steel slag cushion layer is 10-30 cm.
6. The all-steel slag rigid pavement structure of claim 4, wherein a steel slag cushion layer is arranged under the subbase layer, and the thickness of the steel slag cushion layer is 10-30 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220918152.XU CN217419177U (en) | 2022-04-20 | 2022-04-20 | All-steel-slag rigid pavement structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220918152.XU CN217419177U (en) | 2022-04-20 | 2022-04-20 | All-steel-slag rigid pavement structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217419177U true CN217419177U (en) | 2022-09-13 |
Family
ID=83182810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220918152.XU Active CN217419177U (en) | 2022-04-20 | 2022-04-20 | All-steel-slag rigid pavement structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217419177U (en) |
-
2022
- 2022-04-20 CN CN202220918152.XU patent/CN217419177U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20220205188A1 (en) | Full-depth ultra-thin long-life pavement structure and construction method thereof | |
| CN101619557B (en) | Pavement base course material prepared from brick mixed building rubbish regenerated aggregate and preparation method thereof | |
| KR101219616B1 (en) | Lightweight foamed concrete composition having antiwashout property underwater | |
| CN111118999A (en) | Road structure of urban intersection, bus station and bus lane | |
| CN100364918C (en) | Inorganic regenerated concrete mixture and its preparing method | |
| CN111393065A (en) | Construction solid waste regeneration composite roadbed filler and preparation method thereof | |
| CN105544337A (en) | Road construction method | |
| CN101250044A (en) | Road subbase course material and method for preparing same | |
| CN218779258U (en) | Solid waste comprehensive utilization inverted roadbed and pavement structure | |
| CN217419177U (en) | All-steel-slag rigid pavement structure | |
| CN212000441U (en) | Novel road surface structure of urban heavy-load traffic | |
| CN212000440U (en) | Drainage road surface structure of urban intersection and bus stop | |
| CN110194628B (en) | Buffering anti-cracking layer, preparation method thereof, concrete pavement structure and preparation method thereof | |
| CN201495466U (en) | Roadbed constructed by utilizing recycled aggregate from brick and concrete construction waste | |
| CN115029977B (en) | Assembled composite road and bridge transition embankment and construction method thereof | |
| CN217869783U (en) | Fiber reinforcement modified emulsified asphalt pavement structure | |
| CN115679762A (en) | Solid waste comprehensive utilization inverted roadbed and pavement structure | |
| CN1270996C (en) | High-voids porous concrete and construction method for hank and slope protection | |
| CN115852768A (en) | Industrial building solid waste carbon-loaded road structure and information automatic carbon maintenance method thereof | |
| CN212425885U (en) | Recycled concrete permeable pavement brick | |
| CN113652912A (en) | Road structure processing method based on reinforced alkaline residue improved soil | |
| CN101250046A (en) | Foundation material and method for preparing same | |
| KR101183187B1 (en) | Combined paving method | |
| CN214245181U (en) | Composite modified asphalt cold recycling pavement structure | |
| CN213772891U (en) | Adopt compound filler structure's arched bridge structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |