CN113215904B

CN113215904B - Anti-stripping asphalt concrete pavement structure for airport pavement and pavement method thereof

Info

Publication number: CN113215904B
Application number: CN202110488061.7A
Authority: CN
Inventors: 钱振东; 薛永超; 杨文卉; 刘阳
Original assignee: Southeast University
Current assignee: Southeast University
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2022-09-02
Anticipated expiration: 2041-04-30
Also published as: CN113215904A

Abstract

The invention discloses an anti-stripping asphalt concrete pavement structure for an airport pavement and a pavement method thereof, and the pavement structure specifically comprises the following steps: comprises a permeable layer, a lower surface layer, a lower adhesive layer, a middle surface layer, an upper adhesive layer and a wearing layer which are arranged on a pavement base layer from bottom to top in sequence; a transparent layer is laid between the base layer and the lower surface layer, the lower surface layer and the middle surface layer are bonded through a lower bonding layer, and the middle surface layer and the wearing layer are bonded through an upper bonding layer. The pavement structure provided by the invention can adapt to the heavy traffic load requirement of large airplanes, has good high-temperature rut resistance, excellent performances such as skid resistance and water stability, effectively improves the adhesive force between asphalt and aggregate, reduces the aggregate peeling phenomenon, does not need large structural reconstruction within a long service life, is convenient to maintain, and saves the maintenance cost.

Description

Anti-stripping asphalt concrete pavement structure for airport pavement and pavement method thereof

Technical Field

The invention belongs to the technical field of airport pavement engineering, and particularly relates to an anti-stripping asphalt concrete pavement structure for an airport pavement and a pavement method thereof.

Background

In recent years, along with the continuous improvement of the requirements of China on the service performance and flight safety of the pavement in air transportation, the asphalt pavement receives more and more attention due to good deformation yield, comfort and smoothness, higher friction force and low noise. However, with the continuous emergence of new generation large passenger planes and the rapid increase of aviation traffic, under the repeated action of load factors and environmental factors, the asphalt concrete pavement structure is easy to generate diseases such as cracks, wheel tracks, loosening, peeling, pits and the like. The aggregate is peeled off and loosened, the tire of the airplane can be seriously damaged, the flight safety is threatened, only frequent repair and overhaul can be carried out, and the great waste of energy and resources is caused. In view of the above, how to improve the anti-stripping performance of the asphalt pavement of the airport becomes a problem to be solved.

The prior anti-stripping pavement structure mainly exists in a road asphalt concrete pavement, but the working state of the airport pavement asphalt concrete is different from that of the road asphalt concrete pavement. Firstly, compared with the common weight of a road automobile load of dozens of tons and the tire grounding pressure of about 0.4-0.7 MPa, the airplane load borne by an airport pavement is much higher, for example, the maximum takeoff weight of A380-800 of a large civil airliner reaches 5600KN, and the tire pressure of a main landing gear reaches 1.47 MPa; secondly, the speed of the plane sliding on the road surface is high, the speed can reach 200-300 km/h when landing, and the speed of the car running on the road is much lower than that of the plane; in addition, the amount of aircraft traffic on airport pavement is relatively small compared to the amount of automobile traffic on highway pavement. In summary, a highway surface is a large number of repetitions of small loads, while an airport surface is a limited number of repetitions of large loads. Based on this, research on the anti-stripping pavement structure of the asphalt pavement of the airport needs to be carried out.

In recent years, along with the continuous improvement of the requirements of China on the service performance and flight safety of the pavement in air transportation, the asphalt pavement receives more and more attention due to good deformation yield, comfort and smoothness, higher friction force and low noise. However, with the continuous emergence of new generation large passenger planes and the rapid increase of aviation traffic, under the repeated action of load factors and environmental factors, the asphalt concrete pavement structure is easy to generate diseases such as cracks, wheel tracks, loosening, peeling, pits and the like. The aggregate is peeled off and loosened, the tire of the airplane can be seriously damaged, the flight safety is threatened, and only frequent repair and renovation can be carried out, so that the great waste of energy and resources is caused. In view of the above, how to improve the anti-stripping performance of the asphalt pavement of the airport becomes a problem to be solved.

The epoxy asphalt concrete is prepared by mixing an epoxy asphalt binder and an aggregate, has good corrosion resistance, high-temperature stability, water stability and anti-fatigue property, and is generally applied to the fields of pavement of highways, pavement of steel bridges and the like. However, the common epoxy asphalt concrete is generally in a suspension compact type, has a large fine material proportion and a small void ratio, so that the pavement structure using the epoxy asphalt concrete has a smooth surface and a small structural depth, and the anti-skid performance of the pavement structure is poor; the asphalt mastic gravel concrete is compact in framework, large in structural depth and good in anti-sliding performance, but the anti-stripping performance needs to be improved. Therefore, how to design the structural materials of each pavement layer of the airport pavement is particularly important for preparing the pavement structure with good anti-stripping performance and better overall performance.

Disclosure of Invention

The invention provides an anti-stripping asphalt concrete pavement structure for an airport pavement and a pavement method thereof, which can meet the heavy traffic load requirement of a large airplane, have good anti-rutting capability, effectively improve the adhesive force between asphalt and aggregate, reduce the stripping phenomenon of the aggregate, avoid large structural reconstruction of the pavement structure within a longer service life, facilitate maintenance and save the maintenance cost.

The technical scheme adopted by the invention for solving the technical problems is as follows:

an anti-stripping asphalt concrete pavement structure for an airport pavement comprises a pavement base layer, a permeable layer, a lower surface layer, a middle surface layer and an abrasion layer which are sequentially paved from bottom to top, wherein a lower adhesive layer is arranged between the lower surface layer and the middle surface layer and is bonded through the lower adhesive layer, and an upper adhesive layer is arranged between the middle surface layer and the abrasion layer and is bonded through the upper adhesive layer;

the permeable layer is emulsified asphalt which is mainly formed by mixing matrix asphalt, anionic sodium naphthenate emulsifier, water, stabilizer, PH auxiliary agent and wetting agent, and the spreading amount is 0.7-1L/m ² ；

The lower surface layer is paved by asphalt concrete, the asphalt concrete is prepared by matrix asphalt and aggregate according to the weight ratio of 4.6-4.8: 100, wherein: the aggregate is prepared from basalt and a mineral filler according to the weight ratio of 100: 3.0-4.8, the nominal maximum particle size of the basalt is 19.0mm, and the mineral filler is limestone mineral powder;

the lower adhesive layer is paved by a normal-temperature cured epoxy asphalt binder, and the spreading amount is 0.6-0.85 kg/m ² (ii) a The upper adhesive layer is paved by adopting a normal-temperature cured epoxy asphalt binder, and the spreading amount is 0.4-0.6 kg/m ² (ii) a The normal temperature curing epoxy asphalt binder consists of A, B components, wherein the component A consists of 10 parts by weight of epoxy resin, 25-35 parts by weight of matrix asphalt, 0.5-2 parts by weight of diluent, and toughening agent0.3-1 part; the component B is prepared from 5 parts by weight of curing agent, 0.05-0.25 part by weight of accelerator, 0.25-1.5 parts by weight of diluent and A, B components in a weight ratio of 10: 25-35, wherein epoxy resin in the component A is bisphenol A epoxy resin E-44, the diluent is reactive epoxy diluent, the toughening agent is polysulfide rubber toughening agent, the curing agent in the component B is polyamide, the accelerator is tertiary amine accelerator, and the diluent is non-reactive epoxy diluent;

the middle surface layer is paved by using epoxy asphalt concrete for the rough airport, the epoxy asphalt concrete for the rough airport is prepared by epoxy asphalt binder and aggregate according to the weight ratio of 5.4-5.8: 100, wherein: the epoxy asphalt binder is prepared from epoxy resin and matrix asphalt added with a curing agent according to the weight ratio of 1:2.8, the weight ratio of the curing agent to the matrix asphalt is 6.5: 20-30, the epoxy resin adopts bisphenol A epoxy resin E-51, and the curing agent adopts toluene diisocyanate; the aggregate is prepared from basalt and a mineral filler according to the weight ratio of 100: 2.0-4.2, the nominal maximum particle size of the basalt is 19.0mm, and the mineral filler is limestone mineral powder;

the wearing layer is laid by adopting high-viscosity modified asphalt concrete; the high-viscosity modified asphalt concrete is prepared from a modified asphalt binder and aggregates according to a weight ratio of 6.1-6.3: 100, wherein: the modified asphalt binder is prepared from modified asphalt and a modifier according to the weight ratio of 100: 13.4-18.2; the aggregate is prepared from basalt and a mineral filler according to the weight ratio of 100: 8.2-11.1, the nominal maximum particle size of the basalt is 13.2mm, and the mineral filler is limestone mineral powder.

Further, the thickness of the lower surface layer is 60-70 mm; the thickness of the middle surface layer is 60-70 mm; the thickness of the wearing layer is 50-60 mm.

Further, the emulsified asphalt is high-permeability emulsified asphalt, and the matrix asphalt adopts 70# matrix asphalt.

Further, the lower surface layer adopts asphalt concrete AC-20, and the asphalt concrete is prepared from matrix asphalt and aggregate, wherein the matrix asphalt is No. 70 matrix asphalt.

Furthermore, the middle surface layer is paved by adopting epoxy asphalt concrete EA-20 for a rough airport.

Furthermore, the wearing layer is paved by adopting high-viscosity modified asphalt concrete SMA-13, the modified asphalt in the modified asphalt binder adopts SBS modified asphalt, and the modifier adopts TPS modifier.

Further, in the wearing course: the modified asphalt adopts SBS modified asphalt, and the SBS mass content in the SBS modified asphalt is 4-6%; high-modulus basalt fibers are doped in the high-viscosity modified asphalt concrete, the length of the high-modulus basalt fibers is 6mm, and the doping amount of the high-modulus basalt fibers is 0.6%.

A paving method of anti-stripping asphalt concrete for an airport pavement comprises the following steps:

s1, performing surface treatment on a pavement base layer, and cleaning dust and sundries;

s2, preparing emulsified asphalt, namely spraying the emulsified asphalt on the pavement base layer by using a spraying machine to form a permeable layer, wherein the spraying amount is 0.7-1L/m ² ；

S3, preparing asphalt concrete, namely paving the asphalt concrete on the permeable layer by adopting a paver to form a lower surface layer, determining the paving speed of the paver to adapt to the production capacity of a back farm, determining the rolling process and the rolling temperature to control the surface layer thickness and ensuring the compactness;

s4, preparing an epoxy asphalt binder, paving the epoxy asphalt binder on the lower layer to form a lower adhesive layer, and keeping the surface of the epoxy asphalt binder dry;

s5, preparing epoxy asphalt concrete, paving the epoxy asphalt concrete for the rough airport on the lower adhesive layer by adopting a paver to form a middle surface layer, and performing reasonable construction organization in advance according to the construction holding time of the epoxy asphalt concrete for the rough airport and the supply condition of mechanical equipment to ensure that the dispatching of a skip car, the paving of a paving car and the rolling of a road roller are performed scientifically and orderly;

s6, preparing an epoxy asphalt binder, paving the epoxy asphalt binder on the middle surface layer (5) to form an upper adhesive layer (6), and keeping the surface of the epoxy asphalt binder dry;

and S7, preparing high-viscosity modified asphalt concrete, paving the high-viscosity modified asphalt concrete on the upper viscous layer by adopting a paver to form an abrasion layer, determining the paving speed of the paver to adapt to the production capacity of a back farm, determining the thickness of a rolling procedure and the rolling temperature control surface layer, and ensuring the compactness of the abrasion layer.

Further, in step S2, the preparation method of the permeable high-permeability emulsified asphalt comprises: preparing a soap solution from an emulsifier, water and a PH auxiliary agent, grinding the soap solution and the matrix asphalt in a colloid mill to prepare emulsified asphalt, and finally adding a wetting agent and uniformly stirring to prepare the high-permeability emulsified asphalt.

Further, in step S3, the preparation method of the asphalt concrete of the lower surface layer includes: adding matrix asphalt into basalt preheated to 115-125 ℃, and mixing for 30 seconds; finally, the mineral filler is added and mixed for 30 seconds.

Further, in step S4, the preparation method of the normal temperature curing epoxy asphalt binder for the lower adhesive layer includes: firstly, adding epoxy resin, a toughening agent and a diluent into matrix asphalt according to a weight ratio, uniformly stirring at 40-80 ℃, cooling to room temperature to obtain a component A, uniformly stirring a curing agent, an accelerant and the diluent according to the weight ratio to obtain a component B, and finally, mixing the component A and the component B according to the weight ratio at room temperature.

Further, in step S5, the method for preparing the epoxy asphalt concrete for the rough airport of the middle layer includes: firstly, mixing and uniformly mixing epoxy resin heated to 85-95 ℃ and matrix asphalt added with a curing agent heated to 130-135 ℃ according to a weight ratio to prepare an epoxy asphalt binder; then, adding the epoxy asphalt binder into the basalt preheated to 115-125 ℃, and stirring for 30 seconds; finally, the mineral filler is added and mixed for 30 seconds.

Further, in step S6, the preparation method of the normal temperature curing epoxy asphalt binder of the upper adhesive layer includes: firstly, adding epoxy resin, a toughening agent and a diluent into matrix asphalt according to a weight ratio, uniformly stirring at 40-80 ℃, cooling to room temperature to obtain a component A, then uniformly stirring a curing agent, an accelerating agent and the diluent according to the weight ratio to obtain a component B, and finally, mixing the component A and the component B according to the weight ratio at room temperature.

Further, in step S7, the preparation method of the high-viscosity modified asphalt concrete for the wearing layer includes: firstly, preparing high-viscosity modified asphalt from modified asphalt and a modifier according to a weight ratio, then adding basalt, mineral aggregate and high-modulus basalt fiber into a stirrer according to the weight ratio, then adding the high-viscosity modified asphalt, and continuously stirring until the mixture is uniform.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention adopts the high-viscosity modified asphalt concrete SMA-13 wearing layer, the middle surface layer of the epoxy asphalt concrete EA-20 for the rough airport and the lower surface layer of the asphalt concrete AC-20 to form three asphalt concrete layers, thereby ensuring good anti-rutting deformation capability and anti-fatigue performance, and further reducing the damage caused by large traffic volume and large axle load under the conditions of temperature and climate environment.

2. The high-viscosity modified asphalt concrete SMA-13 wearing layer adopted by the invention adopts high-viscosity modified asphalt, so that the cohesiveness between asphalt and aggregate is obviously increased, and the SMA-13 asphalt concrete is framework compact concrete, so that the construction depth is large, the anti-skid performance is good, and in addition, high-modulus basalt fibers are added into the high-viscosity modified asphalt SMA concrete of the wearing layer, so that the aggregate is effectively prevented from loosening and peeling, the anti-stripping performance of the pavement is obviously improved, and the operation safety of an airplane is ensured.

3. High-permeability emulsified asphalt is spread between the base layer and the lower surface layer, and normal-temperature curing epoxy asphalt bonding materials are spread between the lower surface layer and the middle surface layer and between the middle surface layer and the upper surface layer, so that the bonding property between the layers of the pavement layer is good, a unified whole is formed, and the pavement layer has excellent overall performance.

4. The pavement structure does not need large structural reconstruction within a longer service life, is convenient to maintain and saves maintenance cost.

Drawings

Fig. 1 is a schematic view of the anti-stripping asphalt concrete pavement structure for the airport pavement of the invention.

Wherein: 1. a pavement base; 2. a transparent layer; 3. a lower layer; 4. a lower adhesive layer; 5. a middle layer; 6. an upper adhesive layer; 7. and (6) a wearing layer.

Detailed Description

In order that the invention may be more fully understood, reference will now be made to the accompanying drawings, which form a part hereof, and in which is shown by way of illustration, various embodiments of the invention which may be practiced in different forms and not limited to the embodiments described herein, but on the contrary, the embodiments are provided so as to provide a more thorough and complete disclosure of the invention.

Example 1

As shown in fig. 1, in the anti-peeling asphalt concrete pavement structure for an airport pavement of this embodiment, a permeable layer 2, a lower surface layer 3, a lower adhesive layer 4, a middle surface layer 5, an upper adhesive layer 6 and a wearing layer 7 are sequentially arranged on a pavement base layer 1 from bottom to top; a permeable layer 2 is laid between the pavement base layer 1 and the lower surface layer 3, the lower surface layer 3 and the middle surface layer 5 are bonded through a lower bonding layer 4, and the middle surface layer 5 and the wearing layer 7 are bonded through an upper bonding layer 6.

The permeable layer 2 is high permeability emulsified asphalt, which is mainly formed by mixing No. 70 matrix asphalt, anionic sodium naphthenate emulsifier, water, stabilizer, PH auxiliary agent and wetting agent, and the spreading amount is 0.8L/m ² 。

The preparation method of the permeable high-permeability emulsified asphalt comprises the following steps: preparing a soap solution from an emulsifier, water and a PH auxiliary agent, grinding the soap solution and the matrix asphalt in a colloid mill to prepare emulsified asphalt, and finally adding a wetting agent and uniformly stirring to prepare the high-permeability emulsified asphalt.

The lower surface layer 3 is paved by adopting asphalt concrete AC-20, and the asphalt concrete layer is prepared by adopting matrix asphalt and aggregate according to the weight ratio of 4.6:100, wherein: the matrix asphalt is 70# asphalt; the aggregate is prepared from basalt and mineral filler according to the weight ratio of 100:3.8, the nominal maximum particle size of the basalt is 19.0mm, the basalt is hard, compact and wear-resistant, the surface 100% is a crushing surface, the shape is mainly cubic, the mineral filler is limestone mineral powder, and the thickness of the lower layer 3 is 60 mm.

In this example, the asphalt concrete AC-20 grading scheme is shown in Table 1.

TABLE 1 aggregate grading scheme for asphalt concrete AC-20

The preparation method of the asphalt concrete AC-20 of the lower surface layer comprises the following steps: adding matrix asphalt into basalt preheated to 115-125 ℃, and mixing for 30 seconds; finally, the mineral filler is added and mixed for 30 seconds.

The lower adhesive layer 4 is paved by normal temperature curing epoxy asphalt binder, and the spreading amount is 0.65kg/m ² (ii) a The normal temperature curing epoxy asphalt binder consists of A, B components, wherein the component A consists of 10 parts by weight of bisphenol A epoxy resin E-44, 30 parts by weight of matrix asphalt, 1.5 parts by weight of diluent and 0.6 part by weight of toughening agent; the component B is prepared from 5 parts by weight of curing agent, 0.16 part by weight of accelerator and 0.75 part by weight of diluent, wherein the weight ratio of A, B components is 10:28, the diluent in the component A adopts active epoxy diluent, the toughening agent adopts polysulfide rubber toughening agent, the curing agent in the component B adopts polyamide, the accelerator adopts tertiary amine accelerator, and the diluent adopts non-active epoxy diluent.

The preparation method of the normal temperature curing epoxy asphalt binder of the lower adhesive layer comprises the following steps: firstly, adding epoxy resin, a toughening agent and a diluent into matrix asphalt according to a weight ratio, uniformly stirring at 40-80 ℃, cooling to room temperature to obtain a component A, uniformly stirring a curing agent, an accelerant and the diluent according to the weight ratio to obtain a component B, and finally, mixing the component A and the component B according to the weight ratio at room temperature.

The middle surface layer 5 is paved by adopting epoxy asphalt concrete EA-20 for a rough airport, the epoxy asphalt concrete EA-20 for the rough airport is prepared by epoxy asphalt binder and aggregate according to the weight ratio of 5.6:100, wherein: the epoxy asphalt binder is prepared from bisphenol A epoxy resin E-51 and matrix asphalt added with a curing agent according to the weight ratio of 1:2.8, the weight ratio of the curing agent to the matrix asphalt is 6.5:25, and the curing agent adopts toluene diisocyanate; the aggregate is prepared from basalt and mineral filler according to the weight ratio of 100:3.2, the nominal maximum particle size of the basalt is 19.0mm, the basalt is hard, compact and wear-resistant non-acidic hard stone which has better bonding performance with an epoxy asphalt binder for a middle surface layer, 100% of the surface is a crushing surface, the shape of the crushing surface is mainly cubic, and the mineral filler is limestone mineral powder; the thickness of the middle surface layer 5 is 70 mm.

In this example, the EA-20 gradation of epoxy asphalt concrete for rough airports is shown in Table 2.

TABLE 2 aggregate gradation of epoxy asphalt concrete EA-20 for rough airports

The preparation method of the epoxy asphalt concrete EA-20 for the medium-surface course rough airport comprises the following steps: firstly, bisphenol A epoxy resin heated to 85-95 ℃ and matrix asphalt added with curing agent heated to 130-135 ℃ are mixed according to the weight ratio and evenly blended to prepare epoxy asphalt binder; then, adding the epoxy asphalt binder into the basalt preheated to 115-125 ℃, and stirring for 30 seconds; finally, the mineral filler is added and mixed for 30 seconds.

The upper adhesive layer 6 is paved by adopting a normal temperature curing epoxy asphalt binder, and the spreading amount is 0.5kg/m ² (ii) a The normal temperature curing epoxy asphalt binder consists of A, B components, wherein the component A consists of 10 parts by weight of bisphenol A epoxy resin E-44, 30 parts by weight of matrix asphalt, 1.5 parts by weight of diluent and 0.6 part by weight of toughening agent; the component B is prepared from 5 parts by weight of curing agent, 0.16 part by weight of accelerator and 0.75 part by weight of diluent, wherein the weight ratio of A, B is 10:28, the diluent in the component A is active epoxy diluent, the toughening agent is polysulfide rubber toughening agent, the curing agent in the component B is polyamide, the accelerator is tertiary amine accelerator, and the diluent is inactive epoxy diluent.

The preparation method of the normal temperature curing epoxy asphalt binder of the upper adhesive layer comprises the following steps: firstly, adding epoxy resin, a toughening agent and a diluent into matrix asphalt according to a weight ratio, uniformly stirring at 40-80 ℃, cooling to room temperature to obtain a component A, uniformly stirring a curing agent, an accelerant and the diluent according to the weight ratio to obtain a component B, and finally, mixing the component A and the component B according to the weight ratio at room temperature.

The wearing layer 7 is paved by adopting high-viscosity modified asphalt concrete SMA-13; the modified asphalt concrete SMA-13 wearing layer is prepared by adopting a modified asphalt binder and aggregates according to the weight ratio of 6.2:100, wherein: the modified asphalt binder is prepared by SBS modified asphalt and TPS modifier according to the weight ratio of 100:16.2, wherein the mass content of SBS in the SBS modified asphalt is 4%; the aggregate is prepared from basalt and mineral filler according to the weight ratio of 100:10.2, the nominal maximum particle size of the basalt is 13.2mm, the basalt is hard, compact and wear-resistant, the surface 100% is a crushing surface, the shape is mainly cubic, and the mineral filler is limestone mineral powder; high-modulus basalt fibers are doped in the high-viscosity modified asphalt SMA concrete of the wearing layer, the length of the high-modulus basalt fibers is 6mm, and the doping amount of the high-modulus basalt fibers is 0.6%; the wearing course has a thickness of 50 mm.

In this example, the high viscosity modified asphalt concrete SMA-13 grading scheme is shown in Table 3.

TABLE 3 aggregate grading of high-viscosity modified asphalt concrete SMA-13

The preparation method of the high-viscosity modified asphalt concrete SMA-13 of the wearing layer comprises the following steps: firstly, preparing SBS modified asphalt and TPS modifier into high-viscosity modified asphalt according to the weight ratio, then adding basalt, mineral aggregate and high-modulus basalt fiber into a stirrer according to the weight ratio, then adding the high-viscosity modified asphalt, and continuously stirring until the mixture is uniform.

Based on the design, the paving method of the anti-stripping asphalt concrete for the airport pavement comprises the following steps:

firstly, carrying out surface treatment on a pavement base layer 1, and cleaning dust and sundries;

step two, a special spraying machine is adopted for permeationSpraying the high-permeability emulsified asphalt of the layer 2, wherein the spreading amount is 0.7-1L/m ² ；

Paving the asphalt concrete AC-20 of the lower surface layer 3, determining the paving speed of a paver to adapt to the production capacity of a back farm, determining the thickness of a rolling procedure and the rolling temperature control surface layer, and ensuring the compaction degree;

step four: paving the normal-temperature cured epoxy asphalt binder of the lower adhesive layer 4 to ensure absolute drying of the surface of the normal-temperature cured epoxy asphalt binder;

step five: when the epoxy asphalt concrete EA-20 for the rough airport of the middle surface layer 5 is constructed, reasonable construction organization is carried out in advance according to the construction holding time of the epoxy asphalt concrete EA-20 for the rough airport and the supply condition of mechanical equipment, and the dispatching of a skip car, the paving of a paving car and the rolling of a road roller are guaranteed to be carried out scientifically and orderly;

step six, paving the normal-temperature cured epoxy asphalt binder on the upper adhesive layer 6 to ensure that the surface of the normal-temperature cured epoxy asphalt binder is absolutely dry;

and seventhly, when the high-viscosity modified asphalt concrete SMA-13 of the wearing layer 7 is constructed, the paving speed of the paver is determined to adapt to the production capacity of the back field, the thickness of the rolling process and the rolling temperature control surface layer is determined, and the compactness of the wearing layer is ensured.

Example 2

The pavement structure and method of the anti-peeling asphalt concrete for airport pavement used in this example were the same as those of example 1, except that the aggregate grade of the high-viscosity modified asphalt concrete SMA-13 of the wearing layer 7 was different from that of example 1.

The aggregate grading of the high-viscosity modified asphalt concrete SMA-13 of the wearing course 7 is shown in Table 4.

TABLE 4 aggregate grading of high-viscosity modified asphalt concrete SMA-13 in example 2

Example 3

The anti-stripping asphalt concrete pavement structure and method for the airport pavement used in this example are the same as example 1 except that the aggregate modified asphalt binder of the wearing layer 7 high-viscosity modified asphalt concrete SMA-13 is different from example 1 in the configuration of SBS modified asphalt and TPS modifier in the weight ratio of 100: 13.8.

The results of performance tests of the anti-stripping asphalt concrete pavement structures for airport pavement of examples 1, 2 and 3 are shown in table 5:

TABLE 5 Performance test results of anti-stripping asphalt concrete pavement structure for airport pavement

Detecting the index	Example 1	Example 2	Example 3	Comparative example	Technical requirements	Test method
							Dynamic stability/mm ^-1	12500	13200	11200	11800	≥10000	JTG E20-T0719
Depth of construction	0.8	0.9	0.7	0.3	≥0.6	Sanding method
							Coefficient of friction	82	88	78	75	≥45	ASTM E 303-93
Residual stability/%)	94.25	96.12	92.29	94.53	≥90	JTG E20-T0709
							Degree of exfoliation	Small	Small	Small	In (1)	-	-
Maintenance cost	In	In	In	Height of	-	-

Note: the comparative example is a common asphalt concrete pavement structure of the airport pavement, and the upper layer and the lower layer are made of common SMA concrete.

As can be seen from table 5, the performance of the asphalt concrete pavement structure for an airport pavement of the present invention satisfies the technical requirements of the pavement structure for an airport pavement, and has more excellent performance than the pavement structure for an airport pavement.

The high-temperature anti-rutting performance of the asphalt concrete is evaluated by testing the dynamic stability through a rutting test, and the pavement structure has higher dynamic stability, namely the high-temperature anti-rutting performance is excellent; the anti-skid characteristic of the pavement structure is detected by measuring the construction depth and the friction coefficient, so that the pavement structure disclosed by the invention has higher construction depth and friction coefficient, namely the pavement structure disclosed by the invention has better anti-skid performance; the water stability of the pavement structure is evaluated by measuring the residual stability through a water immersion Marshall test, and the residual stability of the pavement structure is superior to that of a comparative example; the degree of stripping of the pavement structure is visually observed after multiple times of wheel milling, so that the pavement structure has the advantages of smaller aggregate stripping rate on the surface and better stripping resistance; in addition, the pavement structure does not need large structural reconstruction within a long service life, is convenient to maintain, and has lower maintenance cost compared with the common pavement structure.

In conclusion, the pavement structure disclosed by the invention has excellent high-temperature rut resistance, better performances such as skid resistance and water stability, good anti-stripping performance, no need of large structural reconstruction within a longer service life, convenience in maintenance and conservation cost saving.

The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.

Claims

1. An anti-stripping asphalt concrete pavement structure for an airport pavement is characterized by comprising a pavement base layer (1), a permeable layer (2), a lower surface layer (3), a middle surface layer (5) and a wearing layer (7) which are sequentially paved from bottom to top, wherein a lower adhesive layer (4) is arranged between the lower surface layer (3) and the middle surface layer (5) and is bonded through the lower adhesive layer (4), and an upper adhesive layer (6) is arranged between the middle surface layer (5) and the wearing layer (7) and is bonded through the upper adhesive layer (6);

the permeable layer (2) is high-permeability emulsified asphalt which is mainly formed by mixing 70# base asphalt, anionic sodium naphthenate emulsifier, water, stabilizer, PH auxiliary agent and wetting agent, and the spreading amount is 0.7-1L/m ² ；

The lower surface layer (3) is paved by asphalt concrete, the asphalt concrete is prepared by matrix asphalt and aggregate according to the weight ratio of 4.6-4.8: 100, wherein: the aggregate is prepared from basalt and a mineral filler according to the weight ratio of 100: 3.0-4.8, the nominal maximum particle size of the basalt is 19.0mm, and the mineral filler is limestone mineral powder;

the lower adhesive layer (4) is paved by adopting an epoxy asphalt binder, and the spreading amount is 0.6-0.85 kg/m ² (ii) a The upper adhesive layer (6) is also paved by adopting an epoxy asphalt binder, and the spreading amount is 0.4-0.6 kg/m ² (ii) a The epoxy asphalt binder is a normal-temperature cured epoxy asphalt binder, the normal-temperature cured epoxy asphalt binder is composed of A, B, the component A is composed of 10 parts of bisphenol A epoxy resin E-44, 25-35 parts of matrix asphalt, 0.5-2 parts of diluent and 0.3-1 part of toughening agent in parts by weight; the component B is prepared from 5 parts by weight of curing agent, 0.05-0.25 part by weight of accelerator, 0.25-1.5 parts by weight of diluent and A, B components in a weight ratio of 10: 25-35, wherein the diluent in the component A is an active epoxy diluent, the toughening agent is a polysulfide rubber toughening agent, and the curing agent in the component B is a polysulfide rubber toughening agentPolyamide is used, tertiary amine accelerator is used as the accelerator, and non-reactive epoxy diluent is used as the diluent;

the middle surface layer (5) is paved by using epoxy asphalt concrete for the rough airport, the epoxy asphalt concrete for the rough airport is prepared by epoxy asphalt binder and aggregate according to the weight ratio of 5.4-5.8: 100, wherein: the epoxy asphalt binder is prepared from epoxy resin and matrix asphalt added with a curing agent according to the weight ratio of 1:2.8, the weight ratio of the curing agent to the matrix asphalt is 6.5: 20-30, the epoxy resin adopts bisphenol A epoxy resin E-51, and the curing agent adopts toluene diisocyanate; the aggregate is prepared from basalt and a mineral filler according to the weight ratio of 100: 2.0-4.2, the nominal maximum particle size of the basalt is 19.0mm, and the mineral filler is limestone mineral powder;

the wearing layer (7) is laid by adopting high-viscosity modified asphalt concrete; the high-viscosity modified asphalt concrete is prepared from a modified asphalt binder and aggregates according to a weight ratio of 6.1-6.3: 100, wherein: the modified asphalt binder is prepared from modified asphalt and a modifier according to the weight ratio of 100: 13.4-18.2; the aggregate is prepared from basalt and a mineral filler according to the weight ratio of 100: 8.2-11.1, the nominal maximum particle size of the basalt is 13.2mm, and the mineral filler is limestone mineral powder.

2. The structure of claim 1, wherein the thickness of the lower surface layer (3) is 60-70 mm; the thickness of the middle surface layer (5) is 60-70 mm; the thickness of the wearing layer (7) is 50-60 mm.

3. The structure according to claim 1, characterized in that in the wearing course (7): the modified asphalt adopts SBS modified asphalt, and the SBS mass content in the SBS modified asphalt is 4-6%; high-modulus basalt fibers are doped in the high-viscosity modified asphalt concrete, the length of the high-modulus basalt fibers is 6mm, and the doping amount of the high-modulus basalt fibers is 0.6%.

4. A paving method of the anti-stripping asphalt concrete for the airport pavement, which is based on the anti-stripping asphalt concrete paving structure for the airport pavement according to any one of claims 1 to 3, and is characterized by comprising the following steps:

step S1, performing surface treatment on the pavement base layer (1) to clean dust and sundries;

step S2, emulsified asphalt is prepared, a spraying machine is adopted to spray the emulsified asphalt on the pavement base layer (1) to form a permeable layer (2), and the spreading amount is 0.7-1L/m ² ；

Step S3, preparing asphalt concrete, and paving the asphalt concrete on the permeable layer (2) by adopting a paver to form a lower surface layer (3);

s4, preparing an epoxy asphalt binder, paving the epoxy asphalt binder on the lower surface layer (3) to form a lower adhesive layer (4), and keeping the surface of the epoxy asphalt binder dry;

step S5, preparing epoxy asphalt concrete, and paving the epoxy asphalt concrete for the rough airport on the lower adhesive layer (4) by adopting a paver to form a middle surface layer (5);

and S7, preparing the high-viscosity modified asphalt concrete, and paving the high-viscosity modified asphalt concrete on the upper viscous layer (6) by adopting a paver to form a wearing layer (7).

5. The method for paving the anti-stripping asphalt concrete for the airport pavement according to claim 4, wherein in the step S2, the emulsified asphalt of the permeable layer (2) is high-permeability emulsified asphalt, and the preparation method comprises the following steps: preparing a soap solution from an emulsifier, water and a PH auxiliary agent, grinding the soap solution and the matrix asphalt in a colloid mill to prepare emulsified asphalt, and finally adding a wetting agent and uniformly stirring to prepare the high-permeability emulsified asphalt.

6. The method for paving the anti-peeling asphalt concrete for the airport pavement according to claim 4, wherein in the step S3, the asphalt concrete of the lower surface layer (3) is prepared by: adding matrix asphalt into basalt preheated to 115-125 ℃, and blending for 30 seconds; finally, the mineral filler is added and mixed for 30 seconds.

7. The method for paving the anti-peeling asphalt concrete for the airport pavement according to claim 4, wherein in the step S4, the epoxy asphalt binder of the lower adhesive layer (4) is prepared by: firstly, adding epoxy resin, a toughening agent and a diluent into matrix asphalt according to a weight ratio, uniformly stirring at 40-80 ℃, cooling to room temperature to obtain a component A, uniformly stirring a curing agent, an accelerant and the diluent according to the weight ratio to obtain a component B, and finally, mixing the component A and the component B according to the weight ratio at room temperature.

8. The method for paving the anti-stripping asphalt concrete for the airport pavement according to claim 4, wherein in the step S5, the preparation method of the rough airport epoxy asphalt concrete for the middle layer (5) comprises the following steps: firstly, mixing epoxy resin heated to 85-95 ℃ and matrix asphalt heated to 130-135 ℃ and added with a curing agent according to a weight ratio, and uniformly mixing to prepare an epoxy asphalt binder; then, adding the epoxy asphalt binder into the basalt preheated to 115-125 ℃, and stirring for 30 seconds; finally, the mineral filler is added and mixed for 30 seconds.

9. The method for paving the anti-stripping asphalt concrete for the airport pavement according to claim 4, wherein in the step S6, the preparation method of the normal temperature curing epoxy asphalt binder of the upper adhesive layer (6) comprises the following steps: firstly, adding epoxy resin, a toughening agent and a diluent into matrix asphalt according to a weight ratio, uniformly stirring at 40-80 ℃, cooling to room temperature to obtain a component A, uniformly stirring a curing agent, an accelerant and the diluent according to the weight ratio to obtain a component B, and finally, mixing the component A and the component B according to the weight ratio at room temperature.

10. The method for paving the anti-stripping asphalt concrete for the airport pavement according to claim 4, wherein in the step S7, the preparation method of the high-viscosity modified asphalt concrete for the wearing layer (7) comprises the following steps: firstly, preparing high-viscosity modified asphalt from modified asphalt and a modifier according to a weight ratio, then adding basalt, mineral aggregate and high-modulus basalt fiber into a stirrer according to the weight ratio, then adding the high-viscosity modified asphalt, and continuously stirring until the mixture is uniform.