CN217460134U - Steel slag pavement structure - Google Patents
Steel slag pavement structure Download PDFInfo
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- CN217460134U CN217460134U CN202123208906.7U CN202123208906U CN217460134U CN 217460134 U CN217460134 U CN 217460134U CN 202123208906 U CN202123208906 U CN 202123208906U CN 217460134 U CN217460134 U CN 217460134U
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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
- 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
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Abstract
The utility model relates to a steel slag pavement structure, which comprises a steel slag cushion layer, a cement steel slag subbase layer, a cement steel slag base layer and a steel slag concrete surface layer from bottom to top in sequence; wherein the thickness of the steel slag cushion layer is more than or equal to 20 cm; the thickness of the cement steel slag subbase layer is 15 cm-25 cm; the thickness of the cement steel slag base layer is 15 cm-25 cm; the thickness of the steel slag concrete surface layer is 20 cm-30 cm. The utility model provides a slag road surface structure, mainly constitute by four bibliographic categories, the slag possesses the hardness height, advantages such as wearability is good, the use of slag in a large number not only has positive effect in the aspect of the environmental protection, simultaneously under the effect of slag granule, can effectively improve the ability of diffusion load, and to the surface course, the basic unit, the adjustment of pertinence has been done to the thickness of underlayment and bed course, make and form interact between the layer, whole road surface structure has good stability and wholeness, whole road surface structure's anti-sliding performance has been increased, effectively increase life.
Description
Technical Field
The utility model relates to a road surface technical field, concretely relates to slag road surface structure.
Background
The pavement structure is an important component in highway construction, and mainly comprises a surface layer, a base layer and a cushion layer. The quality of the road surface structure directly influences the driving safety and the service life. In the road surface structure commonly used in the prior art, a large amount of sandstone materials are used, the use of the sandstone materials not only can cause the environment to be damaged by excessive exploitation of resources, but also can lead to the structural integrity and the stability of the road surface to be weaker, and particularly in the process of constructing highways in severe environments, high and cold plateaus and other places, the overall anti-slip capability of the road surface structure is poorer, the cracking, the collapse and other problems are easy to occur in the structure, and the service life of the road surface structure is directly influenced.
Disclosure of Invention
The utility model aims to provide a: aiming at the problems of weaker integrity and stability, poor anti-sliding performance and shorter service life of the pavement structure in the prior art, the steel slag pavement structure is provided, and has good stability and integrity, good anti-sliding performance and longer service life.
In order to realize the purpose, the utility model discloses a technical scheme be:
a steel slag pavement structure sequentially comprises a steel slag cushion layer, a cement steel slag subbase layer, a cement steel slag base layer and a steel slag concrete surface layer from bottom to top;
wherein the thickness of the steel slag cushion layer is more than or equal to 20 cm; the thickness of the cement steel slag subbase layer is 15 cm-25 cm; the thickness of the cement steel slag base layer is 15 cm-25 cm; the thickness of the steel slag concrete surface layer is 20 cm-30 cm.
The utility model provides a slag pavement structure, mainly constitute by four bibliographic categories, from the top down is the slag bed course in proper order, cement slag underlayer, cement slag basic unit and slag concrete surface course, the slag possesses the hardness height, advantages such as wearability is good, a large amount of uses of slag not only have positive effects in the aspect of the environmental protection, simultaneously under the effect of slag granule, can effectively improve the ability of diffusion load, and to the surface course, the basic unit, the adjustment of pertinence has been done to the thickness of underlayer and bed course, make and form interact between the layer, whole pavement structure has good stability and wholeness, whole pavement structure's anti-sliding performance has been increased, effectively increase life.
Further, the steel slag cushion layer is prepared from a mixture of cement and steel slag. Furthermore, the addition amount of the cement in the steel slag cushion layer is 1 wt% -2 wt%.
Furthermore, the cement steel slag subbase layer is prepared from a mixture of cement, steel slag coarse aggregate and steel slag fine aggregate. Furthermore, the addition ratio of the cement in the cement steel slag subbase layer is 3 wt% -4 wt%.
Furthermore, the cement steel slag base layer is prepared from a mixture of cement, steel slag coarse aggregate and steel slag fine aggregate. Furthermore, the addition amount of the cement in the cement steel slag base layer is 4-5 wt%.
Furthermore, the steel slag concrete surface layer is mainly prepared from a mixture of steel slag coarse aggregate, steel slag fine aggregate, cement, a water reducing agent and water which are mixed according to a certain proportion.
Further, the thickness of the steel slag cushion layer is more than or equal to 25 cm; the thickness of the cement steel slag subbase layer is 15 cm-20 cm; the thickness of the cement steel slag base layer is 20 cm-25 cm; the thickness of the steel slag concrete surface layer is 25 cm-30 cm.
Further, the thickness ratio of the cement steel slag base layer to the steel slag concrete surface layer is 0.5-1: 1. The thickness ratio of the cement steel slag base layer to the steel slag concrete surface layer is an important influence factor influencing the anti-sliding performance of the pavement structure, and the stability of the pavement structure and the effective service life can be ensured within the control range of the appropriate thickness ratio. Preferably, the thickness ratio of the cement steel slag base layer to the steel slag concrete surface layer is 0.8-1: 1.
Further, the thickness ratio of the cement steel slag base layer to the cement steel slag subbase layer is 1-1.25: 1. The thickness ratio of the cement steel slag subbase layer to the cement steel slag base layer is an important influence factor influencing the stability of the pavement structure, the integrity and the stability of the pavement structure can be ensured under the control of the proper thickness ratio, and the service life can be effectively prolonged. Preferably, the thickness ratio of the cement steel slag base layer to the cement steel slag subbase layer is 1-1.1: 1.
Furthermore, a waterproof layer is arranged between the cement steel slag base layer and the steel slag concrete surface layer.
Further, the thickness of the waterproof layer is 4 cm-8 cm. Preferably, the thickness of the waterproof layer is 6 cm-8 cm.
Further, the waterproof layer is a plastic film waterproof layer.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
the utility model provides a slag pavement structure, mainly constitute by four bibliographic categories, from the top down is the slag bed course in proper order, cement slag underlayer, cement slag basic unit and slag concrete surface course, the slag possesses the hardness height, advantages such as wearability is good, a large amount of uses of slag not only have positive effects in the aspect of the environmental protection, simultaneously under the effect of slag granule, can effectively improve the ability of diffusion load, and to the surface course, the basic unit, the adjustment of pertinence has been done to the thickness of underlayer and bed course, make and form interact between the layer, whole pavement structure has good stability and wholeness, whole pavement structure's anti-sliding performance has been increased, effectively increase life.
Drawings
Fig. 1 is a schematic view of the steel slag pavement structure disclosed by the utility model.
Icon: 1-a steel slag cushion layer; 2-cement steel slag subbase layer; 3-cement steel slag base layer; 31-a plastic film layer; 4-steel slag concrete surface course.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Example 1
In the construction process of a certain expressway, a steel slag pavement structure is adopted, and as shown in figure 1, the steel slag pavement structure sequentially comprises a steel slag cushion layer 1, a cement steel slag subbase layer 2, a cement steel slag base layer 3, a waterproof layer 31 and a steel slag concrete surface layer 4 from bottom to top;
wherein the thickness of the steel slag cushion layer 1 is 30 cm; the thickness of the cement steel slag subbase layer 2 is 20 cm; the thickness of the cement steel slag base layer 3 is 20 cm; the thickness of the waterproof layer 31 is 6cm, the waterproof layer 31 is a plastic film waterproof layer, and the thickness of the steel slag concrete surface layer 4 is 25 cm.
The preparation process comprises the following steps:
(1) steel slag cushion layer 1
Steel slag cushion layer 1Using unscreened steel slag aggregate aged for 6 months, the grain size is 0-20mm, the steel slag nonuniform coefficient is 12.37, the curvature coefficient is 2.2, the gradation is good, the water immersion expansion rate of the steel slag aggregate is 1.5 percent and meets the road requirement, adding 1.5 percent of P.O42.5 ordinary portland cement, determining the optimal water content and the maximum dry density of the steel slag aggregate through a vibration compaction test, the measured optimal water content is 10.12 percent, and the maximum dry density is 2.23g/cm 3 And during construction, the water content of the steel slag aggregate is controlled to be +/-2% of the optimal water content, and the steel slag is rolled and compacted in a layering mode to form a steel slag cushion layer 1 with high bearing capacity and good anti-scouring performance.
(2) Cement steel slag subbase layer 2 and cement steel slag base layer 3
The cement steel slag subbase layer 2 and the cement steel slag base layer 3 are steel slag aggregates aged for 6 months at 0-4.75mm, 4.75-9.5mm, 9.5-19mm and 19-31.5mm, the water immersion expansion rates are respectively 1.5%, 1.4%, 1.39% and 1.32% (< 2%), the technical requirements of the steel slag mixture for the base layer are met, and the proportion of the mixture of the cement steel slag subbase layer 2 is cement according to the grading range of a suspension compact structure in the technical specification of construction of a steel slag mixture pavement base layer: 0-4.75mm steel slag: 4.75-9.5mm steel slag: 9.5-19mm steel slag: 19-31.5mm steel slag, 3: 26: 22: 29: 23; the cement steel slag base layer 3 is prepared from the following mixed materials in percentage by weight: 0-4.75mm steel slag: 4.75-9.5mm steel slag: 9.5-19mm steel slag: 19-31.5mm steel slag is 4: 26: 22: 29: 23.
(3) and after the steel slag base layer is maintained, a plastic film is laid. The polyvinyl chloride film for the plastic material has smooth surface, good elasticity and water impermeability, the longitudinal and transverse tensile strength is equal to 18MPa, the longitudinal and transverse elongation at break is greater than or equal to 300%, and the longitudinal and transverse right-angle tear strength is greater than or equal to 65 KN/m.
(4) Steel slag concrete surface layer 4
The selected materials are steel slag sand with the grain size of 0-4.75mm and the fineness modulus of 2.6 after being aged for 12 months and subjected to hot-disintegration treatment, steel slag coarse aggregate with the grain size of 4.75-20mm after being aged for 12 months, 42.5-grade common cement and a retarding water reducer. The pulverization rate of the steel slag coarse aggregate is 0.8 percent, and the application technical requirement of the steel slag for concrete is met. Engineering ofThe standard value f of the flexural tensile strength of the concrete design is required r 5.0MPa, the standard deviation of a concrete bending tensile strength sample is 0.4MPa, the bending tensile strength of pavement concrete preparation is calculated to be 5.67MPa according to the technical specification of pavement cement concrete pavement construction, the actually measured cement flexural strength is 8.0MPa, the concrete water-cement ratio is calculated to be 0.416, 0.4 is taken, the sand rate is 37.5 percent, the water consumption is calculated and is increased properly, then the water consumption is 160kg, the unit cement consumption is calculated to be 400kg, and according to the design rule of common concrete mix proportion, the consumption of coarse and fine aggregates of concrete steel slag is calculated according to a volume method, and the mix proportion is as follows: 160kg of water; 400kg of cement; 1490kg of steel slag; 894kg of steel slag sand; the admixture is 4.8kg, and the admixture is mixed in a laboratory, and the flexural strength measured after sampling is 6.05MPa, thereby meeting the design requirements. And constructing surface layer steel slag concrete by adopting a three-roller-shaft paver.
The utility model provides a slag pavement structure, mainly constitute by four bibliographic categories, from the top down is slag bed course 1 in proper order, cement slag subbase 2, cement slag basic unit 3 and slag concrete surface course 4, the slag possesses hardness height, advantages such as wearability is good, the use of a large amount of slag not only has positive effect in the aspect of the environmental protection, simultaneously under the slag particle effect, can effectively improve the ability of diffusion load, and to the surface course, the basic unit, the adjustment of pertinence has been done to the thickness of subbase and bed course, make and form interact between the layer, whole pavement structure has good stability and wholeness, whole pavement structure's anti-sliding performance has been increased, effectively increase life.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. The steel slag pavement structure is characterized by sequentially comprising a steel slag cushion layer (1), a cement steel slag subbase layer (2), a cement steel slag base layer (3) and a steel slag concrete surface layer (4) from bottom to top;
wherein the thickness of the steel slag cushion layer (1) is more than or equal to 25 cm; the thickness of the cement steel slag subbase layer (2) is 15 cm-20 cm; the thickness of the cement steel slag base layer (3) is 20 cm-25 cm; the thickness of the steel slag concrete surface layer (4) is 25 cm-30 cm; the thickness ratio of the cement steel slag base layer (3) to the steel slag concrete surface layer (4) is 0.5-1: 1; the thickness ratio of the cement steel slag base layer (3) to the cement steel slag subbase layer (2) is 1-1.25: 1; the steel slag cushion layer is a steel slag cement mixed material layer; a waterproof layer (31) is arranged between the cement steel slag base layer (3) and the steel slag concrete surface layer (4); the thickness of the waterproof layer (31) is 4-8 cm.
2. The steel slag pavement structure according to claim 1, wherein the thickness ratio of the cement steel slag base layer (3) to the steel slag concrete surface layer (4) is 0.8-1: 1.
3. The steel slag pavement structure according to claim 1, wherein the thickness ratio of the cement steel slag base layer (3) to the cement steel slag sub-base layer (2) is 1-1.1: 1.
4. The steel slag pavement structure according to claim 1, wherein the waterproof layer (31) has a thickness of 6-8 cm.
5. The steel slag pavement structure according to claim 1, wherein the waterproof layer (31) is a plastic film waterproof layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123208906.7U CN217460134U (en) | 2021-12-20 | 2021-12-20 | Steel slag pavement structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123208906.7U CN217460134U (en) | 2021-12-20 | 2021-12-20 | Steel slag pavement structure |
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| CN217460134U true CN217460134U (en) | 2022-09-20 |
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| CN202123208906.7U Active CN217460134U (en) | 2021-12-20 | 2021-12-20 | Steel slag pavement structure |
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2021
- 2021-12-20 CN CN202123208906.7U patent/CN217460134U/en active Active
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