CN108625245B - Construction process for repairing diseases of drainage asphalt pavement - Google Patents
Construction process for repairing diseases of drainage asphalt pavement Download PDFInfo
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
- E01C7/187—Repairing bituminous covers, e.g. regeneration of the covering material in situ, application of a new bituminous topping
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/22—Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
- E01C11/224—Surface drainage of streets
- E01C11/225—Paving specially adapted for through-the-surfacing drainage, e.g. perforated, porous; Preformed paving elements comprising, or adapted to form, passageways for carrying off drainage
- E01C11/226—Coherent pavings
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- Engineering & Computer Science (AREA)
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- Structural Engineering (AREA)
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Abstract
The invention provides a construction process for repairing diseases of a drainage asphalt pavement, which comprises the following steps: preparing before construction, carrying out pore cleaning treatment on an original drainage asphalt pavement to remove plugs, spraying a waterproof adhesive layer and ensuring that the longitudinal edge of a rectangular pool drains smoothly without blocking holes, determining the using amount of a high-viscosity asphalt regenerant according to the aging degree of the asphalt mixture of the original drainage asphalt pavement, adding the scraped waste drainage asphalt mixture into the high-viscosity asphalt regenerant for mixing, mixing drainage asphalt mixture gradation and high-viscosity modified asphalt or high-viscosity modifier newly-prepared drainage asphalt mixture, conveying the mixed drainage asphalt mixture to pavement paving equipment for paving, rolling the drainage asphalt mixture by adopting a static pressure rolling mode, carrying out surface reinforcement on a repaired pavement after rolling, and opening traffic. The construction process for repairing the diseases of the drainage asphalt pavement heats and softens the damaged pavement through the hot air circulation heater, and prolongs the service life of the repairing layer.
Description
Technical Field
The invention relates to a construction process for repairing diseases of a drainage asphalt pavement, belonging to the technical field of highway engineering in traffic engineering.
Background
The drainage asphalt pavement is a novel asphalt concrete surface layer which has a porosity of 17-23% after being compacted and can form a drainage channel in a mixture. The open-graded asphalt mixture is essentially a framework-gap structure formed by crushed stones with single particle size according to an embedding and extruding mechanism. The drainage asphalt pavement adopts a large-gap asphalt mixture as a pavement surface layer, rain falls penetrate into the drainage functional layer, and rain is transversely discharged through gaps in the layer. Thereby eliminating the road surface water film which brings adverse effects of driving, and remarkably improving the safety and comfort of driving in rainy days.
In recent years, with the significance of drainage asphalt pavement, the pavement is gradually popularized and developed in China. After a period of time of operation and traffic, due to the reasons of construction, climate, heavy load and the like, the problems of diseases such as falling, particle falling, cracks, hole plugging, cracking, cracks and the like can occur on the road surface. Therefore, drainage of the drainage asphalt pavement, noise reduction, or the beauty of the pavement, etc. are seriously affected.
Disclosure of Invention
Aiming at the diseases of the drainage asphalt pavement, the invention aims to provide a construction process for repairing the diseases of the drainage asphalt pavement, aiming at solving the problems of particle falling, pit and slot blockage and the like in the running process of the drainage asphalt pavement.
The invention provides a construction process for repairing the diseases of the drainage asphalt pavement, which comprises the following steps:
preparing before construction, including raw material preparation and construction machinery preparation;
cleaning the pores of the original drainage asphalt pavement to remove the plugs so as to obviously improve the drainage capacity of the original drainage asphalt pavement, wherein the method comprises the steps of investigating the disease condition of the original drainage asphalt pavement, and cleaning the pavement by adopting a special sweeper and hole cleaning equipment so as to ensure that the pavement is clean, free of impurities and free of hole blockage, wherein the plugs comprise dust;
carrying out hot air circulation heating on the cleaned original drainage asphalt pavement to the extent of raking the drainage asphalt mixture on the surface layer of the original drainage asphalt pavement;
raking the heated original drainage asphalt pavement, and removing the old waste on the surface layer of the original drainage asphalt pavement, wherein the removing depth is 0-40 mm;
heating the drainage asphalt pavement with the surface layer removed again to the construction temperature;
deeply raking the secondarily heated drainage asphalt pavement, wherein the thickness of raking is 0-40 mm;
under the condition that the raking thickness is 40mm, spreading a waterproof bonding layer on the middle surface layer to ensure that the longitudinal edge of the rectangular pool drains smoothly without blocking holes;
and determining the dosage of the high-viscosity asphalt regenerant according to the aging degree of the asphalt mixture of the original drainage asphalt pavement.
Adding the high-viscosity asphalt regenerant into the shoveled waste and old drainage asphalt mixture to mix a new drainage asphalt mixture, mixing the drainage asphalt mixture with high-viscosity modified asphalt or the new drainage asphalt mixture, strictly controlling the production temperature of the mixture, discharging the mixture at a temperature less than or equal to 195 ℃, and mixing the mixture by a dry method and/or a wet method;
the mixed drainage asphalt mixture is delivered to a pavement paving device, and the proportion of a newly prepared drainage asphalt mixture in the pavement paving device is 0-100%;
rolling the drainage asphalt mixture by one or more of a steel wheel road roller and a rubber wheel road roller according to the length of the road surface, wherein the rolling mode comprises a static pressure rolling mode;
carrying out surface reinforcement on the pavement after rolling;
and opening the traffic.
For the above construction process, in one possible implementation manner, the open traffic includes: after the construction of the drainage asphalt pavement is finished, traffic is closed for 24-48 hours, and then the traffic is allowed to be opened; or when the road surface to be constructed is cooled in an emergency or when construction vehicles have to pass, the traffic is allowed to be opened when the temperature of the road surface is lower than 50 ℃, and the emergency brake or the emergency rotation is strictly forbidden.
For the above construction process, in one possible way, the raw materials include SBS modified asphalt, high binder, fiber, coarse aggregate, fine aggregate and mineral powder.
For the construction process described above, in one possible implementation, the raw materials include base asphalt, high-tack agent, fiber, coarse aggregate, fine aggregate, and mineral fines.
For the above construction process, in one possible implementation, the raw materials include high viscosity modified asphalt fibers, coarse aggregates, fine aggregates, and mineral fines.
For the above construction process, in one possible implementation, the high-viscosity modified asphalt is finished high-viscosity asphalt that can be directly used.
For the construction process, in a possible implementation manner, a high-viscosity additive needs to be added in the dry mixing process, and a finished product of high-viscosity asphalt is directly adopted in the wet mixing process.
For the construction process, in a possible implementation mode, the repaired drainage asphalt pavement has a large-pore structure, the porosity ranges from 17% to 23%, and the water seepage coefficient is not less than 3600 ml/min.
For the construction process, in a possible implementation manner, the repaired drainage asphalt pavement is paved by adopting a new drainage asphalt mixture, and the doping proportion of the new drainage asphalt mixture is 0-100%.
For the drainage asphalt pavement, in one possible implementation mode, a high-viscosity agent is added into a newly-prepared drainage asphalt mixture to modify asphalt, and the addition amount of the high-viscosity agent is 4-15%.
For the above-mentioned drainage asphalt pavement, in one possible implementation, the dynamic viscosity of the high-viscosity asphalt at 60 ℃ is not less than 200000 pa.s.
For the drainage asphalt pavement, in a possible implementation manner, the original drainage asphalt pavement is a newly-built drainage asphalt pavement or an old drainage asphalt pavement with diseases.
The invention has the beneficial effects that:
the construction process for repairing the diseases of the drainage asphalt pavement provided by the invention adopts special maintenance equipment and the drainage asphalt mixture containing the high-viscosity modifier, so that the repair of the disease surface layer of the drainage asphalt pavement is realized. In addition, the construction process for repairing the diseases of the drainage asphalt pavement has the two characteristics of regeneration of waste drainage asphalt mixture, mixing of new materials and efficient and rapid repair of damaged pavement, is widely used for repairing various diseases such as particle falling, pits and cracks of the drainage asphalt pavement, and has the following advantages:
1. by adopting the repairing construction process, the high-viscosity additive is adopted in the raw materials in the process of repairing the pavement, so that the repaired pavement has a large-gap structure and has the advantages of quick drainage, high skid resistance, noise reduction and the like. In addition, the thickness of a water film on the road surface can be effectively reduced, and the driving safety in rainy days is improved.
2. Through the repair construction process, the repaired pavement has the characteristic of a large-pore structure, so that rainwater can be smoothly discharged in the rainwater discharge process. The problem of the prior art that the drainage performance of the road surface is reduced after the road surface is repaired is solved.
3. The waste asphalt mixture can be regenerated into the usable asphalt mixture again by the drum-type regenerator, and the pavement repairing cost is reduced.
4. When the damaged pavement is repaired, the damaged pavement is heated and softened by the hot air circulation heater, and the heating temperature and time can be controlled, so that the asphalt cannot be aged at high temperature, and the service life of the repair layer is prolonged.
5. The construction process has the advantages of simple structure, convenient construction and good durability, and can be widely applied to maintenance engineering of the drainage asphalt pavement.
6. The drainage asphalt pavement is a framework-void structure, and under the dual actions of framework embedding and extrusion among coarse aggregates and high-viscosity modified asphalt bonding, the pavement has higher strength and bearing capacity, and the service life of the pavement can be prolonged.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features, and aspects of the invention and, together with the description, serve to explain the principles of the invention.
Fig. 1 shows a flow chart of a drainage asphalt pavement disease repair construction process according to an embodiment of the present invention.
Detailed Description
The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention. It is intended that all modifications or alterations to the methods, procedures or conditions of the present invention be made without departing from the spirit and substance of the invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the present invention.
Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art.
The invention is further illustrated by the following examples.
Example 1
Fig. 1 shows a flow chart of a drainage asphalt pavement disease repair construction process according to an embodiment of the present invention. The construction process may include steps S101 to S113.
In step S101, pre-construction preparations including raw material preparation and construction machine preparation are performed.
In step S102, a pore cleaning treatment is performed on the original drainage asphalt pavement to remove a blockage, so as to significantly improve the drainage capacity of the original drainage asphalt pavement, including investigation of the disease condition of the original drainage asphalt pavement, and cleaning of the pavement by using a special sweeper and a hole cleaning device, so as to ensure that the pavement is clean, free of impurities and free of hole blockage, wherein the blockage includes dust.
In step S103, the cleaned raw drainage asphalt pavement is heated by hot air circulation to a degree that the drainage asphalt mixture on the surface layer of the raw drainage asphalt pavement can be raked up.
In step S104, raking the heated original drainage asphalt pavement to remove old waste on the surface layer of the original drainage asphalt pavement, wherein the removing depth is 0-40 mm.
In step S105, the road surface from which the surface layer is removed is heated again to the construction temperature, for example, the construction paving rolling temperature is not lower than 165 ℃.
In step S106, deep scarification is carried out on the pavement after secondary heating, and the scarification thickness is 0-40 mm.
In step S107, after the old waste is removed by shoveling, judging whether the rake bulk reaches 40mm, and directly executing step S108 without spreading a waterproof adhesive layer under the condition that the rake bulk does not reach 40 mm; when the rake thickness reaches 40mm, the waterproof adhesive layer is spread on the middle layer, and then step S108 is performed.
In step S108, the amount of the high-viscosity asphalt recycling agent is determined according to the aging degree of the asphalt mixture of the original drainage asphalt pavement.
In step S109, the high-viscosity asphalt recycling agent is added to the scraped waste drainage asphalt mixture to mix the new drainage asphalt mixture, the drainage asphalt mixture is graded and mixed with the high-viscosity modified asphalt or the new drainage asphalt mixture, the production temperature of the mixture is strictly controlled, the discharge temperature is less than or equal to 195 ℃, and the mixing process adopts dry mixing and/or wet mixing.
In step S110, the mixed drainage asphalt mixture is conveyed to a road surface paving device and paved, and the proportion of the newly mixed drainage asphalt mixture in the road surface paving device is 0-100%.
In step S111, rolling the drainage asphalt mixture includes rolling the drainage asphalt mixture by using one or more rollers of a steel-wheel roller and a rubber-wheel roller according to the length of the road surface, where the rolling mode includes a static pressure rolling mode.
In step S112, the repaired road surface is surface-reinforced after the rolling is completed.
In step S113, traffic is opened.
In one possible implementation mode, the traffic is opened, wherein after the construction of the drainage asphalt pavement is finished, the traffic is allowed to be opened after the traffic is closed for 24-48 hours; or when the road surface to be constructed is cooled in an emergency or when construction vehicles have to pass, the traffic is allowed to be opened when the temperature of the road surface is lower than 50 ℃, and the emergency brake or the emergency rotation is strictly forbidden.
In one possible implementation, the raw material may include a variety of forms, examples of which are as follows:
example one, raw materials may include SBS modified asphalt, high binder, fiber, coarse aggregate, fine aggregate, and mineral fines.
Example two, raw materials may include base asphalt, high tack agent, fiber, coarse aggregate, fine aggregate, and mineral fines.
Example three, the raw materials may include high viscosity modified asphalt fiber, coarse aggregate, fine aggregate, and mineral fines.
In one possible implementation, the high-viscosity modified asphalt is finished high-viscosity asphalt which can be directly used.
In a possible implementation manner, a high-viscosity additive needs to be added in the dry mixing process, and the finished high-viscosity asphalt is directly adopted in the wet mixing process.
The construction process has the beneficial effects that:
1. by adopting the repairing construction process, the high-viscosity additive is adopted in the raw materials in the process of repairing the pavement, so that the repaired pavement has a large-gap structure and has the advantages of quick drainage, high skid resistance, noise reduction and the like. In addition, the thickness of a water film on the road surface can be effectively reduced, and the driving safety in rainy days is improved.
2. Through the repair construction process, the repaired pavement has the characteristic of a large-pore structure, so that rainwater can be smoothly discharged in the rainwater discharge process. The problem of the prior art that the drainage performance of the road surface is reduced after the road surface is repaired is solved.
3. The waste asphalt mixture can be regenerated into the usable asphalt mixture again by the drum-type regenerator, and the pavement repairing cost is reduced.
4. When the damaged pavement is repaired, the damaged pavement is heated and softened by the hot air circulation heater, and the heating temperature and time can be controlled, so that the asphalt cannot be aged at high temperature, and the service life of the repair layer is prolonged.
5. The construction process has the advantages of simple structure, convenient construction and good durability, and can be widely applied to maintenance engineering of the drainage asphalt pavement.
Example 2
The repaired drainage asphalt pavement can be obtained by utilizing the drainage asphalt pavement disease repairing construction process provided by the embodiment 1, the repaired drainage asphalt pavement has a large-pore structure, the porosity is 17-23%, and the water seepage coefficient is not less than 3600 ml/min.
In a possible implementation mode, the repaired drainage asphalt pavement is paved by adopting a new drainage asphalt mixture, and the mixing proportion of the new drainage asphalt mixture is 0-100%.
In a possible implementation mode, a high-viscosity agent is added into a newly-prepared drainage asphalt mixture to modify asphalt, and the addition amount of the high-viscosity agent is 4-15%.
In one possible implementation, the dynamic viscosity of the high-viscosity asphalt at 60 ℃ is not less than 200000 pa.s.
In one possible implementation manner, the original drainage asphalt pavement is a newly-built drainage asphalt pavement or an old drainage asphalt pavement with diseases.
The beneficial effect of this structure lies in:
the drainage asphalt pavement is a framework-void structure, and under the dual actions of framework embedding and extrusion among coarse aggregates and high-viscosity modified asphalt bonding, the pavement has higher strength and bearing capacity, and the service life of the pavement can be prolonged.
Application example 1
The invention provides a construction process for repairing the diseases of the drainage asphalt pavement, which is used for maintaining the old road of the drainage asphalt pavement, and is provided by an application example 1.
Wherein, the drainage asphalt surface layer is paved by PAC-13 drainage asphalt mixture, the void ratio is 20.2%, the water permeability coefficient is 5386ml/min, and the gradation range is shown in the following table 1.
TABLE 1 PAC-13 drainage asphalt mixture gradation range
Wherein, the dosage of the modified asphalt mixed with the high adhesive is 4.8 percent.
The application example is a construction process for repairing the diseases of the drainage asphalt pavement with synchronous adhesive layer, which mainly comprises the following steps:
the method comprises the following steps: the preparation before construction comprises raw material preparation and construction machinery preparation, wherein the raw materials comprise SBS modified asphalt or matrix asphalt, high adhesive, fiber, coarse aggregate, fine aggregate and mineral powder.
Step two: the disease condition of the original drainage asphalt pavement is investigated, and then a special sweeper is adopted to clean the pavement, so that the pavement is clean and free of impurities.
Step three: and carrying out hot air circulation heating on the cleaned original drainage asphalt pavement to the extent of raking the drainage asphalt mixture on the surface layer of the original drainage asphalt pavement.
Step four: raking the heated original drainage asphalt pavement, and removing the old waste on the surface layer of the original drainage asphalt pavement, wherein the removing depth is 0-40 mm.
Step five: and heating the road surface with the surface layer removed again to the construction temperature.
Step six: and deeply raking the pavement subjected to secondary heating, wherein the thickness of raking is 0-40 mm.
Step seven: after the old waste materials are removed by a shovel, judging whether the rake bulk reaches 40mm, and directly executing the step eight without spraying a waterproof bonding layer under the condition that the rake bulk does not reach 40 mm; and under the condition that the raking thickness reaches 40mm, spraying the waterproof bonding layer on the middle surface layer, and then executing the step eight.
Step eight: and determining the appropriate dosage of the high-viscosity asphalt regenerant according to the aging degree of the shoveled asphalt mixture.
Step nine: adding the high-viscosity asphalt regenerant into the shoveled waste and old drainage asphalt mixture to mix a new drainage asphalt mixture, mixing the drainage asphalt mixture with the high-viscosity modified asphalt or the new drainage asphalt mixture, strictly controlling the production temperature of the mixture, discharging the mixture at a temperature less than or equal to 195 ℃, and mixing the mixture by a dry method and/or a wet method. The production temperature control range of the drainage asphalt mixture is shown in the following table 2.
TABLE 2 drainage asphalt mixture production temperature control (C.)
The mixing process adopts a dry mixing mode, and specifically comprises the following steps: and (3) dry-mixing aggregate and fiber for 10s, then spraying SBS modified asphalt, simultaneously adding a high-viscosity additive, mixing for 15s, adding mineral powder after 3-5 s, and wet-mixing for 35s after the mineral powder is added. The mixture is uniformly mixed, all mineral aggregate particles are completely coated with the asphalt binder, and the phenomena of white aggregate, agglomeration and blocking or serious separation of coarse and fine aggregates are avoided.
Step ten: and conveying the mixed drainage asphalt mixture to pavement paving equipment for paving and leveling. The proportion of the newly-prepared drainage asphalt mixture added in the pavement paving equipment is 0-100%.
Step eleven: the rolling and draining asphalt mixture comprises the step of rolling and draining asphalt mixture by one or more of a steel wheel road roller and a rubber wheel road roller according to the length of the road surface, wherein the rolling mode can comprise a static pressure rolling mode.
Step twelve: and after the rolling is finished, carrying out surface reinforcement on the repaired pavement.
Step thirteen: opening traffic, namely closing the traffic for 24-48 hours after the construction of the drainage asphalt pavement is finished, and allowing the traffic to be opened; or the paving layer should be cooled completely in case of emergency or when construction vehicles have to pass, and the road surface, for example, with a surface temperature below 50 ℃, can be opened for traffic and the emergency brake or the emergency turn is strictly prohibited. Application example 2
The invention provides a construction process for repairing the diseases of the drainage asphalt pavement, which is applied to the maintenance of the old road of the drainage asphalt pavement in an application example 2.
Wherein, the drainage asphalt surface layer is paved by PAC-10 drainage asphalt mixture, the void ratio is 19.2 percent, the water permeability coefficient is 5123ml/min, and the gradation range is shown in the following table 3.
TABLE 3 PAC-10 drainage asphalt mixture gradation range
| Type (B) | 13.2 | 9.5 | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 |
| PA-10 | 100 | 80～100 | 8～28 | 5～15 | 5～12 | 4～10 | 4～9 | 4～8 | 3～6 |
Wherein, the dosage of the modified asphalt mixed with the high adhesive is 4.8 percent.
The construction process of the asphalt pavement with the synchronous adhesive layer for drainage mainly comprises the following steps:
the method comprises the following steps: the preparation before construction comprises raw material preparation and construction machinery preparation, wherein the raw materials comprise SBS modified asphalt or matrix asphalt, high adhesive, fiber, coarse aggregate, fine aggregate and mineral powder.
Step two: the disease condition of the original drainage asphalt pavement is investigated, and then a special sweeper is adopted to clean the pavement, so that the pavement is clean and free of impurities.
Step three: and carrying out hot air circulation heating on the cleaned original drainage asphalt pavement to the extent of raking the drainage asphalt mixture on the surface layer of the original drainage asphalt pavement.
Step four: raking the heated original drainage asphalt pavement, and removing the old waste on the surface layer of the original drainage asphalt pavement, wherein the removing depth is 0-40 mm.
Step five: and heating the road surface with the surface layer removed again to the construction temperature.
Step six: and deeply raking the pavement subjected to secondary heating, wherein the thickness of raking is 0-40 mm.
Step seven: after the old waste materials are removed by a shovel, judging whether the rake bulk reaches 40mm, and directly executing the step eight without spraying a waterproof bonding layer under the condition that the rake bulk does not reach 40 mm; and under the condition that the raking thickness reaches 40mm, spraying the waterproof bonding layer on the middle surface layer, and then executing the step eight.
Step eight: and determining the appropriate dosage of the high-viscosity asphalt regenerant according to the aging degree of the shoveled asphalt mixture.
Step nine: adding the high-viscosity asphalt regenerant into the shoveled waste and old drainage asphalt mixture to mix a new drainage asphalt mixture, mixing the drainage asphalt mixture with the high-viscosity modified asphalt or the new drainage asphalt mixture, strictly controlling the production temperature of the mixture, discharging the mixture at a temperature less than or equal to 195 ℃, and mixing the mixture by a dry method and/or a wet method. The production temperature control range of the drainage asphalt mixture is shown in the following table 4.
TABLE 4 drainage asphalt mixture production temperature control (deg.C)
The mixing process adopts a dry mixing mode, and specifically comprises the following steps: and (3) dry-mixing aggregate and fiber for 10s, then spraying SBS modified asphalt, simultaneously adding a high-viscosity additive, mixing for 15s, adding mineral powder after 3-5 s, and wet-mixing for 35s after the mineral powder is added. The mixture is uniformly mixed, all mineral aggregate particles are completely coated with the asphalt binder, and the phenomena of white aggregate, agglomeration and blocking or serious separation of coarse and fine aggregates are avoided.
Step ten: and conveying the mixed drainage asphalt mixture to pavement paving equipment for paving and leveling. The proportion of the newly-prepared drainage asphalt mixture added in the pavement paving equipment is 0-100%.
Step eleven: the rolling and draining asphalt mixture includes rolling and draining asphalt mixture with one or several kinds of steel wheel road roller and rubber wheel road roller according to the road length and static pressure rolling.
Step twelve: and after the rolling is finished, carrying out surface reinforcement on the repaired pavement.
Step thirteen: opening traffic, namely closing the traffic for 24-48 hours after the construction of the drainage asphalt pavement is finished, and allowing the traffic to be opened; or the paving layer should be cooled completely in case of emergency or when construction vehicles have to pass, and the road surface, for example, with a surface temperature below 50 ℃, can be opened for traffic and the emergency brake or the emergency turn is strictly prohibited.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. The construction process for repairing the diseases of the drainage asphalt pavement is characterized by comprising the following steps of:
preparing before construction, including raw material preparation and construction machinery preparation;
cleaning the pores of an original drainage asphalt pavement to remove plugs so as to obviously improve the drainage capacity of the original drainage asphalt pavement, wherein the problems of the original drainage asphalt pavement are investigated, and the pavement is cleaned by adopting a special sweeper and hole cleaning equipment so as to ensure that the pavement is clean, free of impurities and free of hole blockage, wherein the plugs comprise dust, and the original drainage asphalt pavement is a newly-built drainage asphalt pavement or an old drainage asphalt pavement with diseases;
carrying out hot air circulation heating on the cleaned original drainage asphalt pavement to the extent of raking the drainage asphalt mixture on the surface layer of the original drainage asphalt pavement;
raking the heated original drainage asphalt pavement, and removing the old waste on the surface layer of the original drainage asphalt pavement, wherein the removing depth is 0-40 mm;
heating the drainage asphalt pavement with the surface layer removed again to the construction temperature;
deeply raking the secondarily heated drainage asphalt pavement, wherein the thickness of raking is 0-40 mm;
under the condition that the raking thickness is 40mm, spreading a waterproof bonding layer on the middle surface layer to ensure that the longitudinal edge of the rectangular pool drains smoothly without blocking holes;
determining the using amount of the high-viscosity asphalt regenerant according to the aging degree of the asphalt mixture of the original drainage asphalt pavement;
adding the high-viscosity asphalt regenerant into the shoveled waste and old drainage asphalt mixture to mix a new drainage asphalt mixture, mixing the drainage asphalt mixture with high-viscosity modified asphalt or the new drainage asphalt mixture, strictly controlling the production temperature of the mixture, discharging the mixture at a temperature less than or equal to 195 ℃, and mixing the mixture by a dry method and/or a wet method;
conveying the mixed drainage asphalt mixture to pavement paving equipment for paving, wherein the proportion of the newly-prepared drainage asphalt mixture in the pavement paving equipment is 0-100%;
rolling the drainage asphalt mixture by one or more of a steel wheel road roller and a rubber wheel road roller according to the length of the road surface, wherein the rolling mode comprises a static pressure rolling mode;
carrying out surface reinforcement on the repaired pavement after rolling is finished;
the traffic is opened, and the traffic is stopped,
the repaired drainage asphalt pavement has a large-pore structure, the porosity is 17-23%, the water seepage coefficient is not less than 3600ml/min,
the method for preparing the high-viscosity asphalt recycling agent by adding the shoveled waste drainage asphalt mixture and mixing the waste drainage asphalt mixture comprises the following steps:
adding the high-viscosity asphalt regenerant into the shoveled waste and old drainage asphalt mixture, and mixing at a first mixing temperature to obtain the new drainage asphalt mixture, wherein the first mixing temperature is 160-170 ℃;
the step of mixing the drainage asphalt mixture with high-viscosity modified asphalt or newly-prepared drainage asphalt mixture comprises the following steps:
mixing the drainage asphalt mixture grade with high-viscosity modified asphalt or a newly-prepared drainage asphalt mixture at a second mixing temperature of 185-200 ℃.
2. The drainage asphalt pavement disease repair construction process according to claim 1, wherein the open traffic comprises:
after the construction of the drainage asphalt pavement is finished, traffic is closed for 24-48 hours, and then the traffic is allowed to be opened; or when the road surface to be constructed is cooled in an emergency or when construction vehicles have to pass, the traffic is allowed to be opened when the temperature of the road surface is lower than 50 ℃, and the emergency brake or the emergency rotation is strictly forbidden.
3. The drainage asphalt pavement disease repair construction process according to claim 1, wherein the raw materials include SBS modified asphalt, high binder, fiber, coarse aggregate, fine aggregate and mineral powder; or,
the raw materials comprise matrix asphalt, high adhesive, fiber, coarse aggregate, fine aggregate and mineral powder;
the raw materials comprise high-viscosity modified asphalt, fibers, coarse aggregates, fine aggregates and mineral powder.
4. The process for repairing and constructing diseases on asphalt pavement with water drainage according to claim 1, wherein the high-viscosity modified asphalt is finished high-viscosity asphalt which can be directly used.
5. The drainage asphalt pavement disease repair construction process according to claim 1, characterized in that a high-viscosity additive is added in the dry blending process, and a finished high-viscosity asphalt is directly adopted in the wet blending process.
6. The construction process for repairing the diseases of the drainage asphalt pavement according to claim 1, wherein a high-viscosity agent is added into the fresh drainage asphalt mixture to modify asphalt, and the addition amount of the high-viscosity agent is 4-15%.
7. The drainage asphalt pavement disease repair construction process according to claim 4 or 5, wherein the dynamic viscosity of the high-viscosity asphalt at 60 ℃ is not less than 200000 Pa.s.
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| CN110318328A (en) * | 2019-06-26 | 2019-10-11 | 中国路桥工程有限责任公司 | A kind of bituminous pavement fast repairing method |
| CN110528349B (en) * | 2019-08-28 | 2021-07-13 | 广东万标建设工程有限公司 | Asphalt road repairing method |
| CN111088117B (en) * | 2019-12-30 | 2021-04-23 | 吉林大学 | Permeable asphalt pavement cleaning agent and preparation method thereof |
| CN112064441A (en) * | 2020-09-21 | 2020-12-11 | 重庆建工第一市政工程有限责任公司 | Construction method of high-viscosity modified asphalt pavement |
| CN113089442A (en) * | 2021-03-17 | 2021-07-09 | 宁波东兴沥青制品有限公司 | Repairing method for drainage asphalt pavement |
| CN115369711A (en) * | 2022-07-27 | 2022-11-22 | 交通运输部公路科学研究所 | In-situ thermal regeneration construction method for porous asphalt surface layer |
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