CN111021183A - Construction method of open-graded drainage type epoxy asphalt ultrathin anti-skid wearing layer - Google Patents
Construction method of open-graded drainage type epoxy asphalt ultrathin anti-skid wearing layer Download PDFInfo
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- CN111021183A CN111021183A CN201911254641.9A CN201911254641A CN111021183A CN 111021183 A CN111021183 A CN 111021183A CN 201911254641 A CN201911254641 A CN 201911254641A CN 111021183 A CN111021183 A CN 111021183A
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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
- E01C7/35—Toppings or surface dressings; Methods of mixing, impregnating, or spreading them
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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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- 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
- E01C11/24—Methods or arrangements for preventing slipperiness or protecting against influences of the weather
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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
- E01C7/35—Toppings or surface dressings; Methods of mixing, impregnating, or spreading them
- E01C7/353—Toppings or surface dressings; Methods of mixing, impregnating, or spreading them with exclusively bituminous binders; Aggregate, fillers or other additives for application on or in the surface of toppings with exclusively bituminous binders, e.g. for roughening or clearing
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- Engineering & Computer Science (AREA)
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- Road Paving Structures (AREA)
Abstract
The invention provides a construction method of an open-graded drainage type epoxy asphalt ultrathin anti-skid wearing layer, belonging to the highway construction technology. The anti-sliding wearing layer is composed of an open-graded epoxy asphalt mixture with the porosity of 15-20%, and the total thickness is about 1 cm. The invention aims to provide a construction method of an ultrathin anti-skid wearing layer for improving the drainage and anti-skid property of a road surface, which starts from the whole processes of mixing, transportation, paving, rolling and the like, so that the formed wearing layer has enough road performance and plays a role in surface layer drainage, the water drift phenomenon generated when an automobile runs at high speed is reduced, the contact area between a tire and a road surface is increased, and the anti-skid capacity is improved; the thickness of the wearing layer is controlled to be about 1cm, an ultrathin anti-sliding wearing layer is formed, construction cost is reduced, and the time for opening traffic after construction is shortened.
Description
Technical Field
The invention belongs to a highway construction technology, and particularly relates to a construction method of an open-graded drainage type epoxy asphalt ultrathin anti-skid wearing layer.
Background
With the rapid development of the economy, the further improvement of the scientific and technical level and the continuous promotion of the strategy of 'strong traffic nation', the traffic industry in China is unprecedentedly developed, and the higher requirements on the construction of road infrastructure are provided. When the road network access and the road surface bearing capacity are sufficient, the safety, the comfort and the function of the road become the key points of attention of people, and the economical efficiency is also a main factor to be considered. Road surface skid resistance is a major indicator of road safety and a major requirement for functionality, and is a very interesting aspect in road construction. Meanwhile, in order to repair the damaged asphalt pavement surface layer, an anti-skid asphalt wearing layer which is simple in construction, good in service performance and short in traffic time is paved again, so that the method becomes an effective and economic measure.
In bad weather such as rain and snow, traffic accidents often occur due to poor skid resistance of the road surface. Asphalt surface skid resistance depends on micro-texture and macro-texture. In wet conditions, at low vehicle speeds, the water falling on the road surface can be drained from the rolling wheel pattern or partly controlled in the texture of the aggregate surface, the tire remaining in sufficient contact with the road surface, the micro-texture of the road surface being decisive for the anti-skid properties. However, the existence of the macroscopic texture can provide a drainage channel for accumulated water on the interface of the tire and the road surface during high-speed driving, and the phenomenon of water drift is prevented when the driving speed is higher and the water volume is larger. The higher the vehicle speed, the greater the depth of the macro texture required to quickly drain the road surface water. The macro texture is mainly formed by pavement aggregate gaps. Open-graded asphalt mixes tend to have better skid resistance.
The prepared macroporous epoxy asphalt mixture not only has good road performance, but also has excellent drainage performance and skid resistance by using the epoxy asphalt as a binder. However, in the construction of epoxy asphalt, the epoxy asphalt is usually sprayed to the ground firstly, and then the single-particle-size aggregate is laid, so that the method cannot well combine the aggregate and the cementing material, and simultaneously, a compact structure is easily formed, which is not favorable for skid resistance.
In the using process, the road surfaces of various grades of highways and urban roads are influenced by factors such as vehicle load, climate environment and the like for a long time, the anti-skid performance of the road surfaces is declined year by year, and the road surfaces need to be repaired in time. The economical efficiency of repair and the timeliness of traffic become key points of problems, and an ultra-thin wearing layer becomes a good choice.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the background of road development and the defects, the invention provides a construction method of an open-graded drainage type epoxy asphalt ultrathin anti-skid wearing layer, and the open-graded drainage type epoxy asphalt ultrathin anti-skid wearing layer completed by the construction method can comprehensively utilize the high strength, high viscosity, excellent fatigue resistance, durability and aging resistance of the epoxy asphalt. Meanwhile, the open-graded distribution can increase the macroscopic texture of the pavement and improve the anti-skid capability. The ultrathin wearing layer is more economical and environment-friendly, the time required for traffic is short, and a more effective construction means is provided for the ultrathin anti-skid wearing layer of the asphalt pavement.
The technical scheme is as follows: in order to achieve the technical effects, the technical scheme adopted by the invention is as follows: a construction method of an open-graded drainage type epoxy asphalt ultrathin anti-skid wearing layer comprises the following steps:
(1) surface interlayer treatment: cleaning the surface of the pavement 11-13 hours before the wearing layer is paved, and spraying a layer of modified emulsified asphalt (provided by Baoli asphalt plant) mixed with rubber on the surface of the asphalt concrete layer with dense gradation according to the proportion of 0.4-0.6L/m2The water is sprayed, and the emulsion is fully broken to play a role in high adhesion and water sealing;
(2) preparing an epoxy asphalt cement material: epoxy resin is used as a component A, and a component B consists of petroleum asphalt, a curing agent and a high-viscosity modifier; heating the component A to 50-60 ℃, heating the component B to 165-175 ℃, and uniformly stirring to obtain an epoxy asphalt cement;
(3) preparing a mixture of an open graded drainage type epoxy asphalt ultrathin wearing layer: uniformly mixing aggregates, heating to 165-185 ℃, simultaneously heating the epoxy asphalt cement prepared in the step (2) to 165-185 ℃, pouring the epoxy asphalt cement into the aggregates, and mixing to obtain an asphalt mixture;
(4) and (3) transportation: coating an oil-water mixture at the bottom of the transport vehicle, keeping the transport and holding temperature at 160-170 ℃, and controlling the transport time within 1 h;
(5) paving: preheating the paver for 30-40 min to enable the temperature of the ironing plate to reach 130-135 ℃, unloading the transport vehicle at a place 10-30 cm away from the paver after the transport vehicle arrives at the site, pushing the paver to move forward, and paving the mixture at a temperature not lower than 165 ℃ in a manner of combining with a ladder and continuously paving at a constant speed;
(6) rolling: and controlling the compaction temperature at 155-165 ℃, rigidly rolling for 2-3 times by using a 10t steel wheel for initial compaction, and rolling for 3-4 times by using an YL20 rubber-tyred roller for final compaction.
Before the wearing layer is laid in the step (1), a layer of rubber-doped modified emulsified asphalt is sprayed on the surface of the dense-graded asphalt concrete layer, and the rubber-doped modified emulsified asphalt plays roles in high adhesion between layers and water sealing. The construction is carried out 12 hours before paving according to the proportion of 0.4-0.6L/m2And the emulsion is sprayed to ensure that the emulsion is broken fully and is not easy to stick to a wheel.
Preferably, in the step (2), the technical requirements of the epoxy asphalt cement are as follows:
preferably, in the step (2), the component B consists of 98-99% of petroleum asphalt, 0.2-0.5% of curing agent and 0.7-1% of high-viscosity modifier.
Further preferably, in the step (2), the doping amount of the component A is 38-45%, and the balance is the component B.
In the step (3), the aggregates are fine aggregates, and high-quality aggregates which are uniform, clean, approximately cubic in shape, large in edge angle, high in adhesion and high in wear resistance, such as basalt, are selected. The maximum nominal grain size of the aggregate is 4.75mm, the proportion of the aggregate with the grain size of 2.36 mm-4.75 mm is 80% -85%, open gradation is adopted to form a skeleton gap structure, and the thickness of the open gradation asphalt surface layer is controlled to be about 1 cm.
And (5) unloading after the transport vehicle arrives at the site in the paving process, stopping at a neutral position about 10-30 cm away from the paver, and pushing the transport vehicle to move forward by the paver. Before the spreading machine spreads, the material must be preheated for about 30-40 min to ensure that the temperature of the ironing plate reaches more than 130 ℃, the spreading temperature of the mixture is not lower than 165 ℃, and the material is continuously spread at a constant speed by adopting echelon combination.
The porosity of the drainage antiskid wearing layer obtained by the construction method is 15% -20%, the thickness of the drainage antiskid wearing layer is 1-2 cm, the drainage antiskid wearing layer has good drainage and antiskid performance, the driving safety is improved, the construction cost is reduced, and the traffic opening time after construction is shortened.
Has the advantages that: compared with the prior art, the construction method of the open-graded drainage type epoxy asphalt ultrathin wearing layer provided by the invention has the advantages that the obtained asphalt wearing layer has good durability, the material consumption is low, and the economy is good. The open grade is provided with larger porosity, water in road area can be removed in time, the anti-skid property of the pavement is improved, meanwhile, the construction process is simple, the construction time is short, the open traffic is fast, and the method is an effective repairing construction means for the asphalt pavement.
Drawings
FIG. 1 is a schematic flow chart of the construction method of the open-graded drainage type epoxy asphalt ultrathin wearing layer.
Detailed Description
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
The invention discloses a construction method of an open-graded drainage type epoxy asphalt ultrathin wearing layer, and the following embodiment is used for explaining the open-graded drainage type epoxy asphalt ultrathin anti-sliding wearing layer disclosed by the invention:
example 1
Referring to fig. 1, the general flow of the construction method of the open-graded drainage type epoxy asphalt ultra-thin wearing layer is shown in the figure.
Step one, surface interlayer treatment: cleaning the surface of the pavement 12 hours before paving the wearing layer, spraying a layer of modified emulsified asphalt mixed with rubber on the surface of the dense-graded asphalt concrete layer according to the proportion of 0.5L/m2And the water is sprayed to fully demulsify and play roles in high bonding and water sealing.
Step two, preparing epoxy asphalt: the epoxy resin is used as a component A, and 98.7 percent of petroleum asphalt, 0.4 percent of anhydride curing agent and 0.9 percent of TPS high-viscosity modifier are used to form a component B. Heating the component A to 55 ℃, heating the component B to 120 ℃, and then uniformly stirring according to the mixing amount of the component A being 38%, thereby obtaining the epoxy asphalt cement for later use. The samples were taken and the measured properties were:
| properties of | Unit of | Test value |
| Dynamic viscosity at 60 DEG C | Pa·s | 60000 |
| Density at 23 deg.C | g·cm3 | 1.56 |
| Epoxy equivalent | / | 184 |
| Softening point | ℃ | 87 |
| Penetration at 25 ℃ | 0.1mm | 43.5 |
Step three, pre-preparing an epoxy asphalt ultra-thin wearing layer asphalt cement concrete mixture: the aggregates are fine aggregates, the basalt which is uniform, clean, approximately cubic in shape and more in edges and corners is selected, the maximum nominal particle size of the aggregates is 4.75mm, and the following grading is adopted:
| mesh size (mm) | Passage Rate (%) |
| 4.75 | 95 |
| 2.36 | 23 |
| 1.18 | 9 |
| 0.6 | 7 |
| 0.3 | 5 |
| 0.15 | 4 |
| 0.075 | 3 |
And uniformly mixing the aggregates, heating to 170 ℃, simultaneously heating the prepared epoxy asphalt to 170 ℃, pouring the epoxy asphalt into the aggregates, and mixing to obtain the asphalt mixture.
And step four, transportation: the bottom of the transport vehicle needs to be coated with more oil-water mixture, double-layer tarpaulin is used for preserving heat and keeping the transport holding temperature of 165 ℃, and the transport process is controlled within 1 h.
Spreading in the fifth step: the paver is preheated for 35min to ensure that the temperature of the ironing plate reaches more than 130 ℃. After the transport vehicle arrives at the site, the transport vehicle unloads the materials at a position which is about 25cm away from the spreading machine, the spreading machine pushes the materials upwards to move forward, the spreading temperature of the mixture is not lower than 165 ℃, and the materials are continuously spread at a constant speed by adopting echelon combination.
Step six, rolling: the compacting temperature is controlled to be about 160 ℃, the rigid rolling is carried out for 3 times by a 10t steel wheel during the initial compaction, and the rolling is carried out for 3 times by an YL20 rubber-tyred roller during the final compaction. The thickness of the pavement is strictly controlled to be 1cm, and the pavement is maintained for 10h to open traffic.
Example 2
Step one, surface interlayer treatment: cleaning the surface of the pavement 12 hours before paving the wearing layer, spraying a layer of modified emulsified asphalt mixed with rubber on the surface of the dense-graded asphalt concrete layer according to the proportion of 0.5L/m2And the water is sprayed to fully demulsify and play roles in high bonding and water sealing.
Step two, preparing epoxy asphalt: the epoxy resin is used as a component A, and 99% of petroleum asphalt, 0.3% of anhydride curing agent and 0.7% of TPS high-viscosity modifier are used to form a component B. Heating the component A to 60 ℃, heating the component B to 120 ℃, and then uniformly stirring according to the mixing amount of 45 percent of the component A to obtain the epoxy asphalt cement for later use. The samples were taken and the measured properties were:
| properties of | Unit of | Test value |
| Dynamic viscosity at 60 DEG C | Pa·s | 65000 |
| Density at 23 deg.C | g·cm3 | 1.32 |
| Epoxy equivalent | / | 205 |
| Softening point | ℃ | 90 |
| Penetration at 25 ℃ | 0.1mm | 44.3 |
Step three, pre-preparing an epoxy asphalt ultra-thin wearing layer asphalt cement concrete mixture: the aggregates are fine aggregates, the basalt which is uniform, clean, approximately cubic in shape and more in edges and corners is selected, the maximum nominal particle size of the aggregates is 4.75mm, and the following grading is adopted:
| mesh size (mm) | Passage Rate (%) |
| 4.75 | 92 |
| 2.36 | 20 |
| 1.18 | 10 |
| 0.6 | 7 |
| 0.3 | 6 |
| 0.15 | 4 |
| 0.075 | 2 |
And uniformly mixing the aggregates, heating to 180 ℃, simultaneously heating the prepared epoxy asphalt to 180 ℃, pouring the epoxy asphalt into the aggregates, and mixing to obtain the asphalt mixture.
And step four, transportation: the bottom of the transport vehicle needs to be coated with more oil-water mixture, and a double-layer tarpaulin is used for preserving heat and keeping the transport holding temperature at 175 ℃, and the transport process is controlled within 1 h.
Spreading in the fifth step: the paver is preheated for 35min to ensure that the temperature of the ironing plate reaches more than 130 ℃. After the transport vehicle arrives at the site, the material is unloaded at a position which is about 25cm away from the spreading machine, the spreading machine is pushed upwards to move forward, the spreading temperature of the mixture is not lower than 175 ℃, and the mixture is continuously spread at a constant speed by adopting echelon combination.
Step six, rolling: the compacting temperature is controlled to be about 165 ℃, the rigid rolling is carried out for 4 times by a 10t steel wheel in the initial compaction, and the rolling is carried out for 4 times by an YL20 rubber-tyred roller in the final compaction. The thickness of the pavement is strictly controlled to be 1-2 cm, and the pavement is maintained for 9 hours to open traffic.
The examples are respectively sampled, basic parameters are obtained through a scatter test and a Marshall stability test, the high-temperature stability, the low-temperature crack resistance and the water stability are evaluated through a rutting test, a trabecula low-temperature bending test, a freeze-thaw splitting test and a dynamic modulus test, and the anti-skid performance and the drainage performance are evaluated through a dynamic friction coefficient test, a pendulum friction test, a construction depth test and a water seepage test.
The following table shows the test results of the open-graded drainage type epoxy asphalt ultrathin anti-sliding wearing layer of the example 1-2:
Claims (6)
1. a construction method of an open-graded drainage type epoxy asphalt ultrathin wearing layer is characterized by comprising the following steps:
(1) surface interlayer treatment: cleaning the surface of the pavement 11-13 hours before the wearing layer is paved, spraying a layer of rubber-doped modified emulsified asphalt on the surface of the dense-graded asphalt concrete layer, and spraying the rubber-doped modified emulsified asphalt at the ratio of 0.4-0.6L/m2The water is sprayed, and the emulsion is fully broken to play a role in high adhesion and water sealing;
(2) preparing an epoxy asphalt cement material: epoxy resin is used as a component A, and a component B consists of petroleum asphalt, a curing agent and a high-viscosity modifier; heating the component A to 50-60 ℃, heating the component B to 165-175 ℃, and uniformly stirring to obtain an epoxy asphalt cement;
(3) preparing a mixture of an open graded drainage type epoxy asphalt ultrathin wearing layer: uniformly mixing aggregates, heating to 165-185 ℃, simultaneously heating the epoxy asphalt cement prepared in the step (2) to 165-185 ℃, pouring the epoxy asphalt cement into the aggregates, and mixing to obtain an asphalt mixture;
(4) and (3) transportation: coating an oil-water mixture at the bottom of the transport vehicle, keeping the transport and holding temperature at 160-170 ℃, and controlling the transport time within 1 h;
(5) paving: preheating the paver for 30-40 min to enable the temperature of the ironing plate to reach 130-135 ℃, unloading the transport vehicle at a place 10-30 cm away from the paver after the transport vehicle arrives at the site, pushing the paver to move forward, and paving the mixture at a temperature not lower than 165 ℃ in a manner of combining with a ladder and continuously paving at a constant speed;
(6) rolling: and controlling the compaction temperature at 155-165 ℃, rigidly rolling for 2-3 times by using a 10t steel wheel for initial compaction, and rolling for 3-4 times by using an YL20 rubber-tyred roller for final compaction.
2. The construction method of the open grading drainage type epoxy asphalt ultra-thin wearing layer according to claim 1, wherein in the step (2), the technical requirements of the epoxy asphalt cement are as follows:
3. The construction method of the open-graded drainage type epoxy asphalt ultrathin wearing layer according to claim 1, characterized in that in the step (2), the component B consists of 98-99% of petroleum asphalt, 0.2-0.5% of curing agent and 0.7-1% of high-viscosity modifier.
4. The construction method of the open-graded drainage type epoxy asphalt ultrathin wearing layer according to claim 1, characterized in that in the step (2), the mixing amount of the component A is 38-45%, and the balance is the component B.
5. The construction method of the open-graded drainage type epoxy asphalt ultra-thin wearing layer according to claim 1, wherein in the step (3), the maximum nominal grain size of the aggregate is 4.75mm, the proportion of the aggregate with the grain size of 2.36 mm-4.75 mm is 80% -85%, and open-graded drainage is adopted to form a skeleton void structure.
6. The construction method of the open-graded drainage type epoxy asphalt ultrathin wearing layer according to claim 1, characterized in that the porosity of the drainage anti-sliding wearing layer obtained by construction is 15-20%, and the thickness is 1-2 cm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| CN101913800A (en) * | 2010-07-26 | 2010-12-15 | 东南大学 | Ultra-thin wearing layer bituminous concrete material for paving bridge deck and preparation method thereof |
| CN105064207A (en) * | 2015-07-29 | 2015-11-18 | 山东省交通科学研究院 | High-performance steel bridge deck paving structure |
| JP2015218482A (en) * | 2014-05-16 | 2015-12-07 | 株式会社イマイ | Permeable pavement |
| CN206971028U (en) * | 2017-05-12 | 2018-02-06 | 广东中和正通工程技术有限公司 | A kind of colored road surface |
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2019
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Patent Citations (5)
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| CN101886361A (en) * | 2010-07-21 | 2010-11-17 | 中交第一公路勘察设计研究院有限公司 | Epoxy asphalt and crushed stone drainage foundation |
| CN101913800A (en) * | 2010-07-26 | 2010-12-15 | 东南大学 | Ultra-thin wearing layer bituminous concrete material for paving bridge deck and preparation method thereof |
| JP2015218482A (en) * | 2014-05-16 | 2015-12-07 | 株式会社イマイ | Permeable pavement |
| CN105064207A (en) * | 2015-07-29 | 2015-11-18 | 山东省交通科学研究院 | High-performance steel bridge deck paving structure |
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| 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 |
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