CN115928526A - Drainage bituminous pavement structure in sponge city - Google Patents
Drainage bituminous pavement structure in sponge city Download PDFInfo
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- CN115928526A CN115928526A CN202310019806.4A CN202310019806A CN115928526A CN 115928526 A CN115928526 A CN 115928526A CN 202310019806 A CN202310019806 A CN 202310019806A CN 115928526 A CN115928526 A CN 115928526A
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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 application relates to the field of sponge city construction, and particularly discloses a drainage asphalt pavement structure of a sponge city, which comprises a pavement base layer positioned at the lowest layer, wherein an asphalt lower seal layer is paved on the pavement base layer, an asphalt mixture structural layer is paved on the asphalt lower seal layer, an asphalt upper seal layer is paved on the asphalt mixture structural layer, a drainage asphalt concrete pavement layer is paved on the asphalt upper seal layer, and the drainage asphalt concrete pavement layer is paved by drainage asphalt mixture; the drainage asphalt mixture is composed of the following raw materials in parts by weight: 70-100 parts of coarse aggregate, 5-15 parts of fine aggregate, 2-6 parts of mineral powder, 3-7 parts of asphalt and 4-8 parts of water stabilizer. The drainage bituminous pavement structure of this application has water erosion resistant, long service life's advantage.
Description
Technical Field
The application relates to the field of sponge city construction, more specifically, it relates to a drainage bituminous pavement structure in sponge city.
Background
The sponge city is a new generation of city rain and flood management concept, and means that the city can be like a sponge, has good elasticity in the aspects of adapting to environmental changes, coping with natural disasters caused by rainwater and the like, absorbs water, stores water, seeps water and purifies water when raining, releases and utilizes the stored water when needed, and realizes the free migration of rainwater in the city.
The drainage asphalt pavement is a novel asphalt concrete surface layer with the porosity of about 20 percent after compaction and capable of forming a drainage channel in the mixture, and is essentially open-graded asphalt mixture with a framework-void structure formed by single-particle-size crushed stones according to an embedding and extruding mechanism.
The drainage asphalt pavement is used for rainwater to permeate and drain, so that the contact time of drainage asphalt concrete and rainwater is long, the rainwater corrodes the drainage asphalt pavement for a long time, and the strength of the drainage asphalt pavement is reduced.
Disclosure of Invention
In order to reduce the long-term influence of corroding to drainage bituminous paving intensity of rainwater, this application provides a drainage bituminous paving structure in sponge city, adopts following technical scheme:
a drainage asphalt pavement structure of a sponge city comprises a pavement base layer positioned at the lowest layer, wherein an asphalt lower sealing layer is paved on the pavement base layer, an asphalt mixture structural layer is paved on the asphalt lower sealing layer, an asphalt upper sealing layer is paved on the asphalt mixture structural layer, a drainage asphalt concrete pavement layer is paved on the asphalt upper sealing layer, and the drainage asphalt concrete pavement layer is paved by drainage asphalt mixture; the drainage asphalt mixture is composed of the following raw materials in parts by weight: 70-100 parts of coarse aggregate, 5-15 parts of fine aggregate, 2-6 parts of mineral powder, 4-5 parts of asphalt and 4-8 parts of water stabilizer, wherein the water stabilizer comprises an adhesive, a water repellent agent and a curing accelerator, and the weight ratio of the adhesive to the water repellent agent to the curing accelerator is 3-5.
By adopting the technical scheme, the adhesive strength between the asphalt and the coarse aggregate and the fine aggregate is improved by adopting the adhesive, the adhesive and the water repellent agent are promoted to be cured by the curing accelerator to reduce the water permeation, and the water repellent agent further reduces the water permeation, so that the water is discharged from the drainage asphalt mixture, the damage of the long-term retention of the water to the drainage asphalt mixture is effectively reduced, and the influence of the long-term erosion of the rainwater on the strength of the drainage asphalt pavement is reduced.
Preferably, the coarse aggregate is prepared from three specification grades, including 16 mm-13.2 mm coarse aggregate, 13.2 mm-9.5 mm coarse aggregate and 9.5 mm-4.75 mm coarse aggregate, and the weight ratio of the three is 3.
By adopting the technical scheme, the coarse aggregates with three specifications are graded, so that the porosity of the drainage asphalt mixture meets the requirement of the drainage asphalt pavement, and rainwater and the like can be discharged through the drainage asphalt pavement.
Preferably, the coarse aggregate is a mixture of steel slag and limestone, the 16 mm-13.2 mm coarse aggregate is limestone, and the 13.2 mm-9.5 mm coarse aggregate and the 9.5 mm-4.75 mm coarse aggregate are steel slag.
By adopting the technical scheme, the steel slag is used for replacing part of limestone aggregate, and the steel slag belongs to porous alkaline aggregate, so that the connection strength of asphalt and coarse aggregate is effectively improved, and the influence of water erosion on the strength of the asphalt pavement is effectively reduced.
Preferably, the adhesive comprises methyl methacrylate and N-vinylformamide, and the weight ratio of the methyl methacrylate to the N-vinylformamide is 2-4.
By adopting the technical scheme, methyl methacrylate is used as a main bonding component, N-vinyl formamide is added to improve the bonding strength of the bonding agent and the asphalt, the bonding agent is used as a bridge to improve the bonding strength between the asphalt and the coarse aggregate and between the asphalt and the fine aggregate, the condition that the asphalt is separated from the coarse aggregate and the fine aggregate due to moisture erosion is effectively reduced, and the influence of the moisture erosion on the asphalt pavement is reduced.
Preferably, the water repellent comprises sodium methylsiliconate and vinyl silicone oil, and the weight ratio of the sodium methylsiliconate to the vinyl silicone oil is 1.
Through adopting above-mentioned technical scheme, methyl silicon alcohol sodium and vinyl silicone oil improve the infiltration ability of adhesive to make the adhesive infiltration get into coarse aggregate and fine aggregate gap, align and bond, thereby effectively improve bonding effect, after the solidification, methyl silicon alcohol sodium is changed into methyl siloxane and vinyl silicone oil and improves drainage bituminous paving's waterproof ability.
Preferably, the curing accelerator is iron sulfide modified medical stone.
By adopting the technical scheme, the medical stone surface is loaded with the iron sulfide crystals to be used as the nucleating agent to promote the solidification of the adhesive, and the water repellent agent is simultaneously solidified on the coarse aggregate and the fine aggregate during the solidification of the adhesive, so that the water erosion resistance of the drainage asphalt mixture is improved.
Preferably, the curing accelerator is prepared by the following steps: putting medical stone into sodium sulfide solution, stirring for 10-30 min at 40-60 ℃, rotating at the speed of 60-100 r/min, taking out the medical stone, cleaning, putting into carboxymethyl cellulose solution, standing for 5-10 min, taking out the medical stone, dripping ferric sulfate solution onto the medical stone, stirring and mixing simultaneously, taking out the medical stone after mixing, and standing for 30-40 min at 4-10 ℃ to prepare the curing accelerator.
By adopting the technical scheme, ferric sulfate and sodium sulfide generate ferric sulfide crystals, the ferric sulfide crystals are combined on medical stone through hydroxymethyl cellulose to prepare the curing accelerator, and after asphalt is combined with coarse aggregates and fine aggregates through the adhesive, the curing accelerator is combined with the asphalt on the one hand, and promotes the adhesive to be cured on the other hand, so that the bonding strength of the asphalt, the coarse aggregates and the fine aggregates is effectively improved, and the influence of water erosion on the strength of the drainage asphalt pavement is reduced.
Preferably, the drainage asphalt mixture is prepared by the following steps: mixing coarse aggregate, fine aggregate and mineral powder, drying at 180-200 ℃ for 10-20 min, adding an adhesive, a water repellent and a curing accelerator, stirring for 3-5 min, finally adding asphalt preheated to 140-160 ℃, stirring and mixing uniformly, and preserving heat for 3-5 min to obtain a drainage asphalt mixture.
By adopting the technical scheme, the drainage asphalt mixture can be prepared by simple mixing, the operation is simple, and the product is easy to obtain.
In summary, the present application has the following beneficial effects:
1. the adhesive is adopted to improve the adhesive strength between the asphalt and the coarse aggregate and the fine aggregate, the curing accelerator is used for promoting the adhesive and the water repellent agent to be cured so as to reduce the water infiltration, and the water repellent agent is used for further reducing the water infiltration so as to discharge the water from the drainage asphalt mixture, thereby effectively reducing the damage of the long-term retention of the water to the drainage asphalt mixture and further reducing the influence of the long-term erosion of rainwater on the strength of the drainage asphalt pavement.
2. Methyl methacrylate is preferably used as a main bonding component in the application, N-vinyl formamide is added to improve the bonding strength of the bonding agent and the asphalt, the bonding agent is used as a bridge to improve the bonding strength between the asphalt and the coarse aggregate and between the asphalt and the fine aggregate, the situation that the asphalt is separated from the coarse aggregate and the fine aggregate due to moisture erosion is effectively reduced, and the influence of the moisture erosion on the asphalt pavement is reduced.
3. The application uses the medical stone surface loaded iron sulfide crystals as the nucleating agent to promote the solidification of the adhesive, and simultaneously solidifies the water repellent on the coarse aggregate and the fine aggregate during the solidification of the adhesive, so that the water erosion resistance of the drainage asphalt mixture is improved.
Detailed Description
The coarse aggregate in the application comprises limestone with the particle size of 16 mm-13.2 mm, steel slag with the particle size of 13.2 mm-9.5 mm and steel slag with the particle size of 9.5 mm-4.75 mm; the fine aggregate is limestone with the grain size of 4.75 mm-0; the mineral powder is S95-grade slag powder; the asphalt is SBS modified asphalt; methyl methacrylate and N-vinylformamide are both commercially available. The particle size of the medical stone is 2-3mm; the concentration of the sodium sulfide solution is 0.1mol/L; the carboxymethyl cellulose solution with the volume fraction of 1 percent is purchased from the market; the concentration of the ferric sulfate solution is 0.2mol/L;
the present application will be described in further detail with reference to examples.
Preparation example
Preparation example 1
The preparation example discloses a curing accelerator, which is prepared by the following steps:
putting medical stone into a sodium sulfide solution, stirring the sodium sulfide solution for 10min at 40 ℃ at a rotation speed of 60r/min, taking out the medical stone, cleaning, putting the medical stone into a carboxymethyl cellulose solution, standing for 5min, taking out the medical stone, dripping a ferric sulfate solution onto the medical stone, stirring and mixing the materials at the same time, taking out the medical stone after mixing, and standing for 30min at 4 ℃ to obtain the curing accelerator.
Preparation example 2
Putting medical stone into a sodium sulfide solution, stirring the sodium sulfide solution at 50 ℃ for 20min at a rotation speed of 80r/min, taking out the medical stone, cleaning, putting the medical stone into a carboxymethyl cellulose solution, standing for 7min, taking out the medical stone, dripping a ferric sulfate solution onto the medical stone, stirring and mixing simultaneously, taking out the medical stone after mixing, and standing for 35min at 7 ℃ to prepare the curing accelerator.
Preparation example 3
Putting medical stone into a sodium sulfide solution, stirring the sodium sulfide solution at 60 ℃ for 30min at a rotation speed of 100r/min, taking out the medical stone, cleaning, putting the medical stone into a carboxymethyl cellulose solution, standing for 10min, taking out the medical stone, dripping a ferric sulfate solution onto the medical stone, stirring and mixing simultaneously, taking out the medical stone after mixing, and standing for 40min at 10 ℃ to prepare the curing accelerator.
Examples
Example 1
The embodiment discloses a sponge city drainage bituminous paving structure, it is including the road surface basic unit that is located the lower floor, and road surface basic unit upper surface has laid the lower seal of pitch, and the bituminous mixture structural layer has been laid to the lower seal upper surface of pitch, and the upper seal of pitch structural layer upper surface has laid the drainage asphalt concrete pavement layer on the pitch. The lower asphalt seal layer and the upper asphalt seal layer are both formed by paving emulsified asphalt PC-2. The asphalt mixture structural layer is formed by paving densely-distributed asphalt mixtures. The drainage asphalt concrete pavement layer is formed by paving a drainage asphalt mixture.
Example 2
The embodiment discloses a drainage asphalt mixture, which is prepared by the following steps: 70kg of coarse aggregate, 5kg of fine aggregate and 2kg of mineral powder are mixed, dried at 180 ℃ for 10min, then 2kg of methyl methacrylate, 1kg of N-vinyl formamide, 0.5kg of sodium methyl silanol, 0.5kg of vinyl silicone oil and 1kg of the curing accelerator prepared in preparation example 1 are added, stirred for 3min, finally 3kg of asphalt preheated to 150 ℃ is added, stirred and mixed uniformly, and the temperature is kept for 3min, thus obtaining the drainage asphalt mixture.
Example 3
The embodiment discloses a drainage asphalt mixture, which is prepared by the following steps: mixing 85kg of coarse aggregate, 10kg of fine aggregate and 4kg of mineral powder, drying at 190 ℃ for 15min, adding 3kg of methyl methacrylate, 1kg of N-vinyl formamide, 1kg of sodium methyl silanol, 1kg of vinyl silicone oil and 1kg of the curing accelerator prepared in preparation example 2, stirring for 4min, finally adding 5kg of asphalt preheated to 150 ℃, stirring and mixing uniformly, and preserving heat for 4min to obtain a drainage asphalt mixture.
Example 4
The embodiment discloses a drainage asphalt mixture, which is prepared by the following steps: mixing 100kg of coarse aggregate, 15kg of fine aggregate and 6kg of mineral powder, drying at 200 ℃ for 20min, adding 4kg of methyl methacrylate, 1kg of N-vinyl formamide, 1.5kg of sodium methyl silanol, 1.5kg of vinyl silicone oil and 1kg of the curing accelerator prepared in preparation example 3, stirring for 5min, finally adding 7kg of asphalt preheated to 150 ℃, uniformly stirring and mixing, and preserving heat for 5min to obtain a drainage asphalt mixture.
Comparative example
Comparative example 1
The comparative example discloses a drainage asphalt mixture, which is different from example 3 in that: no adhesive is added.
Comparative example 2
The comparative example discloses a drainage asphalt mixture, which is different from example 3 in that: no water repellent was added.
Comparative example 3
The comparative example discloses a drainage asphalt mixture, which is different from example 3 in that: no curing accelerator was added.
Comparative example 4
The comparative example discloses a drainage asphalt mixture, which is different from example 3 in that: no adhesive or water repellent was added.
Comparative example 5
The comparative example discloses a drainage asphalt mixture, which is different from example 3 in that: no binder and curing accelerator were added.
Comparative example 6
The comparative example discloses a drainage asphalt mixture, which is different from example 3 in that: no water repellent and cure accelerator were added.
Comparative example 7
The comparative example discloses a drainage asphalt mixture, which is different from example 3 in that: no adhesive, water repellent and curing accelerator were added.
Performance test
According to JTG E20-2011 test procedures for road engineering asphalt and asphalt mixture
And (3) carrying out a Marshall stability test on the T0709-2011 asphalt mixture, and testing the Marshall stability of the soaked asphalt mixture.
T0719-2011 asphalt mixture rutting test, testing the dynamic stability of asphalt mixture.
T0733 asphalt mix kentucker fly-off test, dip fly-off test.
And testing the water permeability coefficient of the JTG/T3350-03-2020 standard drainage method asphalt mixture.
Table 1 table of performance testing data
By combining the example 3, the comparative example 1, the comparative example 6 and the comparative example 7 and combining the table 1, the methyl methacrylate is used as the main bonding component, the N-vinyl formamide is added to improve the bonding strength between the bonding agent and the asphalt, the bonding strength between the asphalt and the coarse aggregate and the fine aggregate is improved by using the bonding agent as a bridge, the situation that the asphalt is separated from the coarse aggregate and the fine aggregate due to moisture erosion is effectively reduced, and the influence of the moisture erosion on the asphalt pavement is reduced.
By combining example 3, comparative example 2, comparative example 5 and comparative example 7 with table 1, it can be seen that sodium methylsiliconate and vinyl silicone oil improve the permeability of the adhesive, so that the adhesive penetrates into gaps between coarse aggregates and fine aggregates, and is aligned for bonding, thereby effectively improving the bonding effect, and after curing, sodium methylsiliconate is converted into methylsiliconate and vinyl silicone oil to improve the waterproof capability of the drainage asphalt pavement.
It can be seen from the combination of example 3, comparative example 4 and comparative example 7 and the combination of table 1 that iron sulfide crystals are loaded on the surface of medical stone to serve as a nucleating agent to promote the solidification of the adhesive, and a water repellent is simultaneously solidified on coarse aggregates and fine aggregates during the solidification of the adhesive, so that the water erosion resistance of the drainage asphalt mixture is improved.
It can be seen by combining example 3, comparative example 1, comparative example 2, comparative example 3 and comparative example 7 with table 1 that the adhesive is used to improve the adhesive strength between asphalt and coarse and fine aggregates, the curing accelerator is used to promote the curing of the adhesive and the water repellent to reduce the water infiltration, and the water repellent further reduces the water infiltration, so that the water is discharged from the drainage asphalt mixture, thereby effectively reducing the damage of the long-term retention of the water to the drainage asphalt mixture, and further reducing the influence of the long-term erosion of rainwater on the strength of the drainage asphalt pavement.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (8)
1. The drainage asphalt pavement structure of the sponge city is characterized by comprising a pavement base layer positioned at the lowest layer, wherein an asphalt lower seal layer is paved on the pavement base layer, an asphalt mixture structural layer is paved on the asphalt lower seal layer, an asphalt upper seal layer is paved on the asphalt mixture structural layer, a drainage asphalt concrete pavement layer is paved on the asphalt upper seal layer, and the drainage asphalt concrete pavement layer is formed by paving a drainage asphalt mixture; the drainage asphalt mixture is composed of the following raw materials in parts by weight: 70-100 parts of coarse aggregate, 5-15 parts of fine aggregate, 2-6 parts of mineral powder, 4-5 parts of asphalt and 4-8 parts of water stabilizer, wherein the water stabilizer comprises an adhesive, a water repellent and a curing accelerator, and the weight ratio of the adhesive to the water repellent to the curing accelerator is (3-5).
2. The asphalt pavement structure for drainage in sponge cities as claimed in claim 1, wherein: the coarse aggregate is prepared by grading three specifications, including 16 mm-13.2 mm coarse aggregate, 13.2 mm-9.5 mm coarse aggregate and 9.5 mm-4.75 mm coarse aggregate, and the weight ratio of the three is 3.
3. The asphalt pavement structure for drainage in sponge cities as claimed in claim 1, wherein: the coarse aggregate is a mixture of steel slag and limestone, the aggregate of 16 mm-13.2 mm is limestone, and the coarse aggregate of 13.2 mm-9.5 mm and the coarse aggregate of 9.5 mm-4.75 mm are steel slag.
4. The asphalt pavement structure for drainage in sponge cities as claimed in claim 1, wherein: the adhesive comprises methyl methacrylate and N-vinylformamide, wherein the weight ratio of the methyl methacrylate to the N-vinylformamide is 2-4.
5. The asphalt pavement structure for drainage in sponge cities as claimed in claim 1, wherein: the water repellent comprises sodium methylsiliconate and vinyl silicone oil, wherein the weight ratio of the sodium methylsiliconate to the vinyl silicone oil is 1.
6. The asphalt pavement structure for drainage in sponge cities as claimed in claim 1, wherein: the curing accelerator is iron sulfide modified medical stone.
7. The asphalt pavement structure for drainage in sponge cities as claimed in claim 1, wherein: the curing accelerator is prepared by the following steps: putting medical stone into sodium sulfide solution, stirring for 10-30 min at 40-60 ℃, rotating at the speed of 60-100 r/min, taking out the medical stone, cleaning, putting into carboxymethyl cellulose solution, standing for 5-10 min, taking out the medical stone, dripping ferric sulfate solution onto the medical stone, stirring and mixing simultaneously, taking out the medical stone after mixing, and standing for 30-40 min at 4-10 ℃ to prepare the curing accelerator.
8. The asphalt pavement structure for drainage in sponge cities as claimed in claim 1, wherein: the drainage asphalt mixture is prepared by the following steps: mixing coarse aggregate, fine aggregate and mineral powder, drying at 180-200 ℃ for 10-20 min, adding an adhesive, a water repellent and a curing accelerator, stirring for 3-5 min, finally adding asphalt preheated to 140-160 ℃, stirring and mixing uniformly, and preserving heat for 3-5 min to obtain a drainage asphalt mixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310019806.4A CN115928526A (en) | 2023-01-06 | 2023-01-06 | Drainage bituminous pavement structure in sponge city |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310019806.4A CN115928526A (en) | 2023-01-06 | 2023-01-06 | Drainage bituminous pavement structure in sponge city |
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| CN115928526A true CN115928526A (en) | 2023-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310019806.4A Pending CN115928526A (en) | 2023-01-06 | 2023-01-06 | Drainage bituminous pavement structure in sponge city |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116444238A (en) * | 2023-04-10 | 2023-07-18 | 杭州航弘建设科技有限公司 | High-performance cement stable aggregate and preparation method thereof |
-
2023
- 2023-01-06 CN CN202310019806.4A patent/CN115928526A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116444238A (en) * | 2023-04-10 | 2023-07-18 | 杭州航弘建设科技有限公司 | High-performance cement stable aggregate and preparation method thereof |
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