CN107805991B - Construction method of epoxy ultrathin water-tight anti-skid layer of asphalt pavement - Google Patents
Construction method of epoxy ultrathin water-tight anti-skid layer of asphalt pavement Download PDFInfo
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- CN107805991B CN107805991B CN201711122311.5A CN201711122311A CN107805991B CN 107805991 B CN107805991 B CN 107805991B CN 201711122311 A CN201711122311 A CN 201711122311A CN 107805991 B CN107805991 B CN 107805991B
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- epoxy
- asphalt
- aggregate
- asphalt pavement
- construction
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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
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
- E01C19/16—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials for applying or spreading liquid materials, e.g. bitumen slurries
- E01C19/17—Application by spraying or throwing
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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
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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
- E01C7/182—Aggregate or filler materials, except those according to E01C7/26
Abstract
The invention relates to a construction method of an epoxy ultrathin water-tight skid resistant layer of an asphalt pavement, belongs to a highway construction technology, and aims to provide a novel method for improving the firmness and the durability of the water-tight skid resistant layer of the asphalt pavement, wherein the key points of the technical scheme are that 20-40% of the total amount of epoxy asphalt required by a construction process is sprayed on aggregate during construction, and the rest of epoxy asphalt is directly sprayed on the asphalt pavement; the invention is used for the maintenance treatment of the asphalt pavement.
Description
Technical Field
The invention belongs to a highway construction technology, and particularly relates to a construction method of an epoxy ultrathin water-tight anti-skid layer of an asphalt pavement.
Background
When roads and municipal road pavements of various grades are used, the anti-skid performance of the road surface is degraded year by year under the long-term action of factors such as vehicle load, climate environment and the like. On the condition that the road surface has no other serious diseases, the anti-skid performance of the road surface cannot meet the use requirement within 3-4 years, and great safety risks are caused to lives and properties of people.
In order to better ensure the use function of the road surface and effectively guarantee the driving safety, a highway management department or an operator can timely carry out maintenance and repair to restore the antiskid function of the road surface.
However, the existing repair materials and technologies have poor pertinence to repair the anti-skid function of the road surface, especially for special road sections with fast anti-skid function decline, the existing repair materials and technologies have slow repair speed and high cost, and are difficult to meet the requirement of repeated and fast repair in a short period.
Epoxy asphalt is a mixture of epoxy resin, curing agent and asphalt through complicated chemical modification. The cured epoxy asphalt mixture is a material with high strength and mechanical property, and has low temperature sensitivity. The epoxy asphalt concrete has excellent performances of high strength, high adhesion, fatigue resistance, corrosion resistance and the like, and is commonly used for pavement skid resistance repair or preventive maintenance.
At present, epoxy asphalt is usually directly sprayed to the ground firstly in epoxy asphalt construction, then aggregate is paved, although the method has certain skid resistance, the skid resistance layer can not be well combined and has poor firmness due to non-uniform spraying of the epoxy asphalt, and therefore the durability and the skid resistance of the pavement are influenced.
Disclosure of Invention
Aiming at the defects, the invention provides a construction method of an epoxy ultrathin water-tight anti-skid layer of an asphalt pavement, and the epoxy asphalt ultrathin water-tight anti-skid layer completed by the construction method is more durable and has higher anti-skid performance.
In order to achieve the technical effects, the technical scheme provided by the invention is as follows: a construction method of an epoxy ultrathin water-tight skid-resistant layer of an asphalt pavement is characterized in that during construction, 20-40% of the total amount of epoxy asphalt required by a construction process is sprayed on aggregate, and the rest of epoxy asphalt is directly sprayed on the asphalt pavement.
Wherein the included angle α between the spraying direction of the epoxy asphalt and the falling direction of the aggregate is 45-65 degrees.
Wherein, 25-30% of the total amount of the epoxy asphalt required by the construction process is sprayed on the aggregate, and the aggregate is sprayed.
Wherein, the spraying dosage of the epoxy asphalt is as follows: 150 to 250g/m2。
Wherein the aggregate is one or two of basalt and diabase, and the grain diameter is 2.5 mm.
Wherein the aggregate dosage is as follows: 3 to 6kg/m2。
Wherein, the method also comprises the steps of technical detection, road condition investigation, disease treatment, material inspection and mechanical calibration before spraying the epoxy asphalt.
Wherein, before spraying the epoxy asphalt, the construction road section needs to be cleaned and decontaminated.
Wherein, after the epoxy asphalt is sprayed, the method also comprises the steps of road surface rolling, maintenance, excess material recovery, effect detection and traffic opening.
Compared with the traditional method, the method has the following beneficial effects:
1. according to the invention, 20-40% of epoxy asphalt is sprayed on the aggregate, and the rest of epoxy asphalt is sprayed on the ground, so that the epoxy asphalt is sprayed more uniformly, the cohesiveness of the aggregate is stronger, and the overall strength and the skid resistance of the pavement are further improved;
2. the epoxy ultrathin water-tight skid-resistant layer is one of preventive maintenance construction processes, and has the advantages of high construction speed, small interference on traffic during construction, small pollution to the environment, small driving noise, good waterproof and skid-resistant durability and the like;
3. the epoxy ultrathin dense water skid resistance can fill micro cracks of a road surface, so that the constructed road surface has a good waterproof function, and loose stones can be prevented from falling off and aggregates can be prevented from being lost by adopting a bonding material with higher viscosity; meanwhile, the asphalt aging of the pavement is slowed down, the skid resistance of the pavement is improved, and the appearance of the pavement is obviously improved.
Drawings
FIG. 1 is a schematic representation of the angle α between the direction of spraying the epoxy asphalt and the direction of fall of the aggregate.
Detailed Description
The following claims are hereby incorporated into the detailed description of the invention, with the understanding that the present disclosure is to be considered as a full and non-limiting example, and any limited number of modifications may be made without departing from the scope of the invention.
Example 1
The area of the asphalt pavement used in this example was 100m2(ii) a The adopted aggregate is basalt with the grain diameter equal to 2.5 mm.
The construction process comprises the following steps:
step 1: technical detection, road condition investigation, disease treatment, material inspection and mechanical calibration;
step 2: 3kg of epoxy asphalt is sprayed on 300kg of aggregate and the aggregate is spread, and 12kg of epoxy asphalt is directly sprayed on the asphalt pavement;
and step 3: rolling the pavement, maintaining, recovering excess materials, detecting effects and opening traffic.
The sprayed epoxy asphalt in the step 2 is characterized in that an included angle α between the spraying direction of the epoxy asphalt and the falling direction of the aggregate is 45 degrees, the included angle α is shown in figure 1, wherein 1 refers to an epoxy asphalt discharge port directly sprayed on an asphalt pavement, 2 refers to an epoxy asphalt discharge port sprayed on the aggregate, and 3 refers to a hopper for the aggregate.
Example 2
The area of the asphalt pavement used in this example was 100m2(ii) a The aggregate used was diabase with a particle size equal to 2.5 mm.
The construction process comprises the following steps:
step 1: technical detection, road condition investigation, disease treatment, material inspection and mechanical calibration;
step 2: spraying 10kg of epoxy asphalt on 600kg of aggregate, and spreading the aggregate, wherein 15kg of epoxy asphalt is directly sprayed on the asphalt pavement;
and step 3: rolling the pavement, maintaining, recovering excess materials, detecting effects and opening traffic.
Wherein, the spraying direction of the epoxy asphalt in the step 2 is 60 degrees to the falling direction of the aggregate α.
Example 3
The area of the asphalt pavement used in this example was 100m2(ii) a The aggregate used is a mixture of basalt and diabase with a particle size equal to 2.5 mm.
The construction process comprises the following steps:
step 1: technical detection, road condition investigation, disease treatment, material inspection and mechanical calibration;
step 2: 6kg of epoxy asphalt is sprayed on 450kg of aggregate and the aggregate is spread, 14kg of epoxy asphalt is directly sprayed on the asphalt pavement;
and step 3: rolling the pavement, maintaining, recovering excess materials, detecting effects and opening traffic.
Wherein, the spraying direction of the epoxy asphalt in the step 2 is 65 degrees to the falling direction α of the aggregate.
Comparative example 1
The area of the asphalt pavement used in this example was 100m2(ii) a The adopted aggregates are the combination of basalt and diabase, and the particle size of the aggregates is 2.5 mm.
The construction process comprises the following steps:
step 1: technical detection, road condition investigation, disease treatment, material inspection and mechanical calibration;
step 2: 20kg of epoxy asphalt is directly sprayed on the asphalt pavement; spreading 450kg of aggregate;
and step 3: rolling the pavement, maintaining, recovering excess materials, detecting effects and opening traffic.
The following measurements of the parameters were made for the asphalt pavements completed by the constructions of examples 1-3 and comparative example 1 according to the following method, as detailed in Table 1:
TABLE 1 test parameters for examples 1-3 and comparative example 1
| Item | Example 1 | Example 2 | Example 3 | Comparative example 1 |
| Construction depth (mm) | 0.46 | 0.43 | 0.47 | 0.51 |
| Water permeability coefficient (ml/min) | 17 | 13 | 19 | 42 |
| Coefficient of friction | 66 | 62 | 60 | 56 |
| Loose condition of crushed stone surface | Is free of | Light and slight | Is free of | Much more |
As can be seen from Table 1, the surface skid resistance of the sprinkled basalt macadam is better than that of diabase under the condition of the same aggregate particle size, the water seepage coefficient is effectively reduced compared with the traditional mode by spraying epoxy asphalt on the aggregate surface and then spraying the residual epoxy asphalt on the asphalt pavement, which shows that the water damage resistance is enhanced, meanwhile, the surfaces of the macadams of examples 1, 2 and 3 have good bonding performance, the surface of the macadam of comparative example 1 has more loose conditions and poor bonding firmness and skid resistance, and the included angle α between the spraying direction of the epoxy asphalt and the falling direction of the aggregate is suggested to be 45-65 degrees.
Compared with the traditional method, the construction method provided by the invention has the advantages that the firmness, durability and skid resistance are greatly improved.
The above description is only exemplary of the invention, and any modification, equivalent replacement, and improvement made within the spirit and scope of the present invention should be considered within the scope of the present invention.
Claims (3)
1. A construction method of an epoxy ultrathin water-tight skid-resistant layer of an asphalt pavement is characterized in that during construction, 20-40% of the total amount of epoxy asphalt required by a construction process is sprayed on aggregate, the rest of epoxy asphalt is directly sprayed on the asphalt pavement, and an included angle α between the spraying direction of the epoxy asphalt and the falling direction of the aggregate is 45-65 degrees.
2. The construction method of the epoxy ultrathin water-tight skid-resistant layer for the asphalt pavement according to claim 1, characterized in that 25-30% of the total amount of epoxy asphalt required by a construction process is sprayed on aggregate.
3. The construction method of the epoxy ultrathin water-tight skid-resistant layer of the asphalt pavement according to any one of claims 1-2, characterized in that the spraying amount of the epoxy asphalt is as follows: 150 to 250g/m2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711122311.5A CN107805991B (en) | 2017-11-14 | 2017-11-14 | Construction method of epoxy ultrathin water-tight anti-skid layer of asphalt pavement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711122311.5A CN107805991B (en) | 2017-11-14 | 2017-11-14 | Construction method of epoxy ultrathin water-tight anti-skid layer of asphalt pavement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107805991A CN107805991A (en) | 2018-03-16 |
| CN107805991B true CN107805991B (en) | 2020-03-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201711122311.5A Active CN107805991B (en) | 2017-11-14 | 2017-11-14 | Construction method of epoxy ultrathin water-tight anti-skid layer of asphalt pavement |
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| CN (1) | CN107805991B (en) |
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2017
- 2017-11-14 CN CN201711122311.5A patent/CN107805991B/en active Active
Non-Patent Citations (5)
| Title |
|---|
| "智能型沥青洒布车及其在沥青路面施工中的应用";李太杰;《中国公路学会2003年学术年会论文集》;20031230;第148-150页 * |
| "机场SMA高温变形中集料倾角变化规律";王海朋等;《建筑材料学报》;20160430;第19卷(第2期);第397-403页 * |
| "沥青路面超薄罩面关键技术研究";陈博;《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》;20120115(第1期);第23、38页 * |
| "环氧沥青封层对沥青混凝土路面病害的处治";韩民等;《河南科技》;20110131;第76-77页 * |
| "超薄罩面层SMA_5沥青混合料的设计";吴旷怀等;《华南理工大学学报(自然科学版)》;20060430;第34卷(第4期);第43-46页 * |
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| CN107805991A (en) | 2018-03-16 |
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Effective date of registration: 20210624 Address after: Room 1002, 1003, 1007, No.83 Baiyun Road, Yuexiu District, Guangzhou, Guangdong 510000 Patentee after: Guangdong LULUTONG Co.,Ltd. Address before: 510623 43 / F and 44 / F, Litong Plaza, 32 Zhujiang East Road, Tianhe District, Guangzhou City, Guangdong Province Patentee before: GUANGDONG TRANSPORTATION INDUSTRY INVESTMENT Co.,Ltd. |