A paving material and paving method for cement concrete bridge decks at ramps.

Abstract

This invention discloses a paving material for cement concrete bridge decks at ramps, belonging to the field of road construction technology. It includes epoxy asphalt concrete, which comprises epoxy asphalt binder, aggregate, and polyester fiber added sequentially and mixed evenly. The aggregate includes aggregates, mineral powder, and slag and fly ash from municipal solid waste incineration. This invention uses municipal solid waste incineration ash to replace some of the coarse and fine aggregates and mineral powder in the epoxy asphalt concrete, which helps reduce the use of natural aggregates and protects the environment, while also lowering project costs. Furthermore, it effectively solves problems such as rutting and shoving on ramp surfaces under high temperatures, preventing vehicles from skidding at ramps.

Description

Technical Field

[0001] This invention belongs to the field of road construction technology, specifically relating to a paving material and paving method for cement concrete bridge decks at ramps. Background Technology

[0002] Highway interchange ramps typically have steeper longitudinal slopes, sharper curves, and frequent braking, subjecting them to more complex loads than other road sections. Combined with the high-temperature, heavy-load service conditions, this places a significant burden on the pavement, making it prone to rutting and shoving. Furthermore, pavement damage on ramps tends to appear earlier and be more severe than on the main road. At the same time, the increasing traffic volume presents significant challenges to the maintenance of ramp pavement.

[0003] Epoxy asphalt concrete is a thermosetting concrete material made from epoxy asphalt and aggregates of a specific gradation using a particular process. It features high strength, good high-temperature performance, high bond strength, and low temperature sensitivity. Epoxy asphalt concrete is typically used for steel bridge deck paving, where the conditions are more demanding, requiring concrete with higher technical specifications. In contrast, the requirements for cement concrete bridge deck paving at interchanges and ramps are lower than for steel bridge deck paving, but higher than for ordinary road paving. Therefore, epoxy asphalt concrete, with its lower technical specifications and cost, can be used for this type of road paving.

[0004] In recent years, with the promotion of waste incineration, my country generates a significant amount of waste ash and residue annually. The ash and residue produced during waste incineration includes two types: bottom ash (slag) from the incinerator and air pollution control residue (fly ash) generated from flue gas purification. Depending on the composition of the waste, the amount of ash and residue generally ranges from 5% to 20% of the total weight of the waste before incineration. Given the limited national land resources, the limited capacity of existing sanitary landfills, and the difficulty in selecting sites for new sanitary landfills, how to utilize waste incineration ash and residue as a resource has become a hot topic of concern.

[0005] Patents such as "Using Municipal Solid Waste Incineration Fly Ash Directly as Filler in Asphalt Mixtures and Its Cleaning Application in Road Surfaces" utilize ordinary asphalt to treat fly ash, providing only physical stabilization with limited effectiveness. Patent "A Binder for Asphalt Concrete Made from Municipal Solid Waste Incineration Fly Ash and Asphalt Concrete" discloses a binder and asphalt concrete made from municipal solid waste incineration fly ash, but with a low fly ash treatment rate. Regarding municipal solid waste incineration slag, the literature "Durability Performance of Asphalt Mixture Made from Municipal Solid Waste Incineration Slag" uses municipal solid waste incineration slag aggregate in asphalt mixtures AC-20 and SMA-13, but it can only replace about 10% of the natural aggregate by mass, providing only physical stabilization with similarly limited effectiveness.

[0006] Epoxy asphalt undergoes a curing reaction, effectively encapsulating fly ash and slag from waste incineration, significantly reducing the leaching of residual heavy metals. Furthermore, using incinerated ash to partially replace the coarse and fine aggregates and mineral powder in epoxy asphalt concrete helps reduce the use of natural aggregates, improves environmental protection, and lowers project costs. Summary of the Invention

[0007] In view of this, the purpose of the present invention is to provide a paving material and paving method for cement concrete bridge decks at ramps, so as to solve the technical problems of insufficient stability of paving at ramps and how to utilize waste resources after incineration.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A paving material for cement concrete bridge decks at ramps includes epoxy asphalt concrete, wherein the epoxy asphalt concrete comprises epoxy asphalt binder, aggregate, and polyester fiber added sequentially and mixed evenly, wherein the aggregate comprises aggregate, mineral powder, and slag and fly ash from waste incineration.

[0010] Further, the epoxy asphalt binder comprises anhydride-modified asphalt and epoxy resin; the epoxy resin comprises 30-50 parts of a main agent and 15-35 parts of a curing agent, wherein the main agent is made from glycidyl ether epoxy resin, hyperbranched epoxy resin and epoxy soybean oil raw material; the curing agent is a mixture of phthalic anhydride, polyetheramine and hexadecylamine; the anhydride-modified asphalt is one or more of maleic anhydride-modified asphalt, butyl succinic anhydride-modified asphalt, and 2-buten-1-yl succinic anhydride-modified asphalt.

[0011] Furthermore, the glycidyl ether epoxy resin is one or more of bisphenol A glycidyl ether resin, aliphatic glycidyl ether resin, phenolic epoxy resin, and brominated epoxy resin.

[0012] Furthermore, the slag is the bottom ash from the furnace after waste incineration, which has undergone resource recovery treatment such as crushing, screening, impurity removal, magnetic separation for iron removal, and precious metal sorting, with a particle size range of 0-9.5mm; the fly ash is the material collected by the flue gas dust collector after waste incineration, which has been washed with water, with a particle size range of 0-0.3mm, and a mass percentage of ≤0.075mm greater than 75%.

[0013] Furthermore, the mass ratio of fly ash to slag is 1:5 to 1:7.

[0014] Furthermore, the epoxy asphalt binder accounts for 5.5-8.0% of the aggregate mass, the mixing temperature is 120-180℃, and the mixing time is 2-5 minutes; the polyester fiber accounts for 0.2-0.5% of the total mass of the epoxy asphalt concrete.

[0015] Furthermore, the present invention also includes a method for paving material for cement concrete bridge decks at ramps, comprising the following steps:

[0016] Further, S1, a cement concrete layer is constructed on the bridge foundation, and then the bridge deck is roughened to remove the surface laitance until the aggregate on the cement concrete surface is exposed;

[0017] S2. Apply a waterproof adhesive layer to the surface of the cement concrete layer;

[0018] S3. Apply the lower layer to the surface of the waterproof adhesive layer;

[0019] S4. After roughening the surface of the underlayment, apply the adhesive layer to its surface.

[0020] S5. Apply the top layer to the surface of the adhesive layer;

[0021] S6. After construction is completed, the area will be sealed for curing. Once the top layer of epoxy asphalt concrete has cured to 60%, traffic can be opened.

[0022] Furthermore, both the surface layer and the underlayer of the pavement use epoxy asphalt binder. In the surface layer, the epoxy asphalt binder contains 30-50% epoxy resin and 6.0-8.0% of the aggregate mass. In the underlayer, the epoxy asphalt binder contains 25-40% epoxy resin and 5.5-7.5% of the aggregate mass. Both the waterproof bonding layer and the bonding layer use the same two-stage reactive epoxy resin adhesive, with a dosage of 0.3-0.6 kg / m². 2 .

[0023] Furthermore, the slag content of the lower layer epoxy asphalt concrete accounts for 0-50% of the aggregate, and is not zero; the slag content of the upper layer epoxy asphalt concrete accounts for 0-30% of the aggregate, and is not zero; the fly ash content of the lower layer epoxy asphalt concrete accounts for 0-100% of the mineral powder, and is not zero; the fly ash content of the upper layer epoxy asphalt concrete accounts for 0-60% of the mineral powder, and is not zero; the thickness of the lower layer is 2.5-5cm, and the thickness of the upper layer is 2.0-3.5cm.

[0024] Furthermore, in step S3, the lower layer is laid after the first stage of curing of the two-stage reactive epoxy resin adhesive and before the effective period of the adhesive bond; in step S5, the upper layer is laid after the first stage of curing of the two-stage reactive epoxy resin adhesive, before the effective period of the adhesive bond, and after the lower layer has cured by 40%.

[0025] The beneficial effects of this invention are as follows:

[0026] 1. This invention uses municipal solid waste incineration ash to replace some of the coarse and fine aggregates and mineral powder in epoxy asphalt concrete. Epoxy asphalt is acidic, while municipal solid waste incineration ash is alkaline. The combination of the two results in better adhesion. After the epoxy asphalt undergoes a curing reaction, it can coat the municipal solid waste incineration ash, stabilize and solidify the harmful substances in it, and remove the "hazard" from the municipal solid waste incineration ash. This is beneficial for reducing the use of natural aggregates and protecting the environment, as well as reducing engineering costs.

[0027] 2. Due to the thermosetting properties of epoxy asphalt, the epoxy asphalt concrete possesses excellent mechanical properties, high-temperature performance, and bonding properties. Roughening the epoxy asphalt concrete underlayment can strengthen the bond between the upper and lower layers of the pavement. The construction temperature of epoxy asphalt concrete is 120-180℃. At this temperature, the binder will melt again. Under the action of paving and compaction, large aggregate particles are embedded in the molten waterproof bonding layer and interlayer bonding layer, bonding the cement concrete bridge deck, the upper layer of the pavement, and the lower layer of the pavement into a tight whole. This further improves the shear resistance of the pavement structure and can effectively solve the problems of rutting and shoving at high temperatures on ramps, preventing vehicles from skidding on ramps.

[0028] Other advantages, objectives, and features of the invention will be set forth in the following description and will be apparent to those skilled in the art in some respects, or may be learned by practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0029] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration:

[0030] Figure 1 This is a structural layout diagram of the present invention. Detailed Implementation

[0031] Example 1

[0032] This embodiment provides a paving material for cement concrete bridge decks at ramps, comprising epoxy asphalt concrete. The epoxy asphalt concrete includes epoxy asphalt binder, aggregate, and polyester fiber, which are added sequentially and mixed uniformly. The epoxy asphalt binder includes epoxy resin and anhydride-modified asphalt. The epoxy resin comprises 39 parts of a main agent and 21 parts of a curing agent. The main agent is made from 100 parts of glycidyl ether epoxy resin, 15 parts of hyperbranched epoxy resin, and 10 parts of epoxy soybean oil raw material. The curing agent is a mixture of 20 parts of phthalic anhydride, 10 parts of polyetheramine, and 30 parts of hexadecylamine. The anhydride-modified asphalt is maleic anhydride-modified asphalt. The aggregate includes aggregates, mineral powder, and slag and fly ash from waste incineration.

[0033] The lower layer of the pavement is epoxy asphalt concrete, the aggregate is basalt, and the mineral powder is limestone powder; the slag content accounts for 30% of the aggregate, the fly ash content accounts for 60% of the mineral powder, the mass ratio of fly ash to slag is 1:5.5, the epoxy resin content in the epoxy asphalt binder accounts for 32%, the epoxy asphalt binder content accounts for 6.5% of the aggregate mass, and the polyester fiber content accounts for 0.25% of the total mass of the epoxy asphalt concrete;

[0034] The surface layer of the pavement is epoxy asphalt concrete, the aggregate is basalt, and the mineral powder is limestone powder; the slag content accounts for 20% of the aggregate, the fly ash content accounts for 40% of the mineral powder, the mass ratio of fly ash to slag is 1:5.8, the epoxy resin content in the epoxy asphalt binder accounts for 39%, the epoxy asphalt binder content accounts for 6.7% of the aggregate mass, and the polyester fiber content accounts for 0.35% of the total mass of the epoxy asphalt concrete;

[0035] The mixing temperature for both the lower and upper layers of epoxy asphalt concrete is 170℃, and the mixing time is 3 minutes.

[0036] A method for paving a cement concrete bridge deck structure at ramps:

[0037] S1. Construct a cement concrete layer for the bridge foundation, and then roughen the cement concrete layer by removing the surface laitance until the aggregate on the cement concrete surface is exposed.

[0038] S2. Apply a waterproof adhesive layer to the surface of the cement concrete layer. The waterproof adhesive layer uses a two-stage reactive epoxy resin adhesive with a dosage of 0.45 kg / m². 2 ;

[0039] S3. After the first stage of the waterproof adhesive layer has cured and before the adhesive validity period, apply the lower layer to its surface. The thickness of the lower layer is 4cm and the construction temperature is 170℃.

[0040] S4. After roughening the surface of the lower layer of the pavement by shot blasting or sandblasting, apply the adhesive layer to the surface. The adhesive layer uses a two-stage reactive epoxy resin adhesive at a dosage of 0.45 kg / m². 2 ;

[0041] S5. After the first stage of the adhesive layer has cured, before the adhesive validity period has expired, and after the lower layer has cured 40%, the upper layer is applied to its surface. The thickness of the upper layer is 3cm, and the construction temperature is 170℃.

[0042] S6. After construction is completed, the area will be sealed for curing. Once the top layer of epoxy asphalt concrete has cured to 60%, traffic can be opened.

[0043] Example 2

[0044] This embodiment provides a paving material for cement concrete bridge decks at ramps, comprising epoxy asphalt concrete. The epoxy asphalt concrete includes epoxy asphalt binder, aggregate, and polyester fiber, which are added sequentially and mixed uniformly. The epoxy asphalt binder includes epoxy resin and anhydride-modified asphalt. The epoxy resin comprises 45 parts of a main agent and 22.5 parts of a curing agent. The main agent is made from 100 parts of glycidyl ether epoxy resin, 20 parts of hyperbranched epoxy resin, and 12 parts of epoxy soybean oil raw material. The curing agent is a mixture of 25 parts of phthalic anhydride, 15 parts of polyetheramine, and 20 parts of hexadecylamine. The anhydride-modified asphalt is maleic anhydride-modified asphalt. The aggregate includes aggregates, mineral powder, and slag and fly ash from waste incineration.

[0045] The lower layer of the pavement is epoxy asphalt concrete, the aggregate is diabase, and the mineral powder is limestone powder; the slag content accounts for 20% of the aggregate, the fly ash content accounts for 40% of the mineral powder, the mass ratio of fly ash to slag is 1:6.0, the epoxy resin content in the epoxy asphalt binder accounts for 27%, the epoxy asphalt binder content accounts for 6.2% of the aggregate mass, and the polyester fiber content accounts for 0.30% of the total mass of epoxy asphalt concrete;

[0046] The surface layer of the pavement is epoxy asphalt concrete, the aggregate is diabase, and the mineral powder is limestone powder; the slag content accounts for 15% of the aggregate, the fly ash content accounts for 30% of the mineral powder, the mass ratio of fly ash to slag is 1:6.3, the epoxy resin content in the epoxy asphalt binder accounts for 35%, the epoxy asphalt binder content accounts for 6.5% of the aggregate mass, and the polyester fiber content accounts for 0.37% of the total mass of the epoxy asphalt concrete;

[0047] The mixing temperature for the lower and upper layers of epoxy asphalt concrete is 150℃, and the mixing time is 2.5 minutes.

[0048] A method for paving a cement concrete bridge deck structure at ramps:

[0049] S1. Construct a cement concrete layer for the bridge foundation, and then roughen the cement concrete layer by removing the surface laitance until the aggregate on the cement concrete surface is exposed.

[0050] S2. Apply a waterproof adhesive layer to the surface of the cement concrete layer. The waterproof adhesive layer uses a two-stage reactive epoxy resin adhesive with a dosage of 0.40 kg / m². 2 ;

[0051] S3. After the first stage of the waterproof adhesive layer has cured and before the adhesive validity period, the lower layer is laid on its surface. The thickness of the lower layer is 4cm and the construction temperature is 150℃.

[0052] S4. After roughening the surface of the lower layer of the pavement through shot blasting or sandblasting, apply the bonding layer to the surface. The bonding layer uses a two-stage reactive epoxy resin adhesive at a dosage of 0.40 kg / m². 2 ;

[0053] S5. After the first stage of the adhesive layer has cured, before the adhesive validity period has expired, and after the lower layer has cured 40%, the upper layer is applied to its surface. The thickness of the upper layer is 3cm, and the application temperature is 150℃.

[0054] S6. After construction is completed, the area will be sealed for curing. Once the top layer of epoxy asphalt concrete has cured to 60%, traffic can be opened.

[0055] Example 3

[0056] This embodiment provides a paving material for cement concrete bridge decks at ramps, comprising epoxy asphalt concrete. The epoxy asphalt concrete includes epoxy asphalt binder, aggregate, and polyester fiber, which are added sequentially and mixed uniformly. The epoxy asphalt binder comprises epoxy resin and anhydride-modified asphalt. The epoxy resin comprises 32 parts of a main agent and 17 parts of a curing agent. The main agent is made from 100 parts of glycidyl ether epoxy resin, 10 parts of hyperbranched epoxy resin, and 15 parts of epoxy soybean oil raw material. The curing agent is a mixture of 32 parts of phthalic anhydride, 10 parts of polyetheramine, and 13 parts of hexadecylamine. The anhydride-modified asphalt is maleic anhydride-modified asphalt. The aggregate includes aggregates, mineral powder, and slag and fly ash from waste incineration.

[0057] The lower layer of the pavement is epoxy asphalt concrete, the aggregate is limestone, and the mineral powder is limestone mineral powder; the slag content accounts for 40% of the aggregate, the fly ash content accounts for 80% of the mineral powder, the mass ratio of fly ash to slag is 1:6.5, the epoxy resin content in the epoxy asphalt binder accounts for 36%, the epoxy asphalt binder content accounts for 6.8% of the aggregate mass, and the polyester fiber content accounts for 0.35% of the total mass of epoxy asphalt concrete;

[0058] The surface layer of the paving is epoxy asphalt concrete, the aggregate is limestone, and the mineral powder is limestone mineral powder; the slag content accounts for 25% of the aggregate, the fly ash content accounts for 50% of the mineral powder, the mass ratio of fly ash to slag is 1:6.7, the epoxy resin content in the epoxy asphalt binder accounts for 45%, the epoxy asphalt binder content accounts for 6.9% of the aggregate mass, and the polyester fiber content accounts for 0.43% of the total mass of epoxy asphalt concrete;

[0059] The mixing temperature for the lower and upper layers of epoxy asphalt concrete is 130℃, and the mixing time is 3.5 minutes.

[0060] A method for paving a cement concrete bridge deck structure at ramps:

[0061] S1. Construct a cement concrete layer for the bridge foundation, and then roughen the cement concrete layer by removing the surface laitance until the aggregate on the cement concrete surface is exposed.

[0062] S2. Apply a waterproof adhesive layer to the surface of the cement concrete layer. The waterproof adhesive layer uses a two-stage reactive epoxy resin adhesive with a dosage of 0.50 kg / m². 2 ;

[0063] S3. After the first stage of the waterproof adhesive layer has cured and before the adhesive validity period, the lower layer is laid on its surface. The thickness of the lower layer is 4cm and the construction temperature is 130℃.

[0064] S4. After roughening the surface of the lower layer of the pavement by shot blasting or sandblasting, apply the adhesive layer to the surface. The adhesive layer uses a two-stage reactive epoxy resin adhesive at a dosage of 0.50 kg / m². 2 ;

[0065] S5. After the first stage of the adhesive layer has cured, before the adhesive validity period has expired, and after the lower layer has cured 40%, the upper layer is applied to its surface. The thickness of the upper layer is 3cm, and the construction temperature is 130℃.

[0066] S6. After construction is completed, the area will be sealed for curing. Once the top layer of epoxy asphalt concrete has cured to 60%, traffic can be opened.

[0067] Comparative Example 1

[0068] This comparative example provides a paving material for cement concrete bridge decks at ramps, comprising asphalt concrete, wherein the asphalt concrete comprises SBS modified asphalt, aggregate, and polyester fiber added sequentially and mixed evenly; the aggregate comprises aggregate, mineral powder, and slag and fly ash from waste incineration.

[0069] The lower layer of the pavement is asphalt concrete, the aggregate is basalt, and the mineral powder is limestone mineral powder; the slag content accounts for 30% of the aggregate, the fly ash content accounts for 60% of the mineral powder, the mass ratio of fly ash to slag is 1:5.5, the SBS modified asphalt content accounts for 5.6% of the aggregate mass, and the polyester fiber content accounts for 0.25% of the total mass of the asphalt concrete.

[0070] The surface layer of the pavement is asphalt concrete, the aggregate is basalt, and the mineral powder is limestone mineral powder; the slag content accounts for 20% of the aggregate, the fly ash content accounts for 40% of the mineral powder, the mass ratio of fly ash to slag is 1:5.8, the SBS modified asphalt content accounts for 5.8% of the aggregate mass, and the polyester fiber content accounts for 0.35% of the total mass of the asphalt concrete.

[0071] The mixing temperature for the lower and upper layers of asphalt concrete is 170℃, and the mixing time is 3 minutes.

[0072] A method for paving a cement concrete bridge deck structure at ramps:

[0073] S1. Construct a cement concrete layer for the bridge foundation, and then roughen the cement concrete layer by removing the surface laitance until the aggregate on the cement concrete surface is exposed.

[0074] S2. Apply a waterproof bonding layer to the surface of the cement concrete layer. The waterproof bonding layer uses emulsified asphalt at a dosage of 0.50 kg / m³. 2 ;

[0075] S3. Lay the lower layer on the waterproof adhesive layer. The thickness of the lower layer is 4cm and the construction temperature is 170℃.

[0076] S4. After roughening the surface of the lower pavement layer by shot blasting or sandblasting, apply the bonding layer to the surface. The bonding layer uses emulsified asphalt at a dosage of 0.50 kg / m². 2 ;

[0077] S5. The top layer is laid on the adhesive layer. The thickness of the top layer is 3cm and the construction temperature is 170℃.

[0078] S6. After construction is completed, traffic can be opened once the temperature of the top layer of asphalt concrete has dropped to 50°C.

[0079] Comparative Example 2

[0080] This comparative example provides a paving material for cement concrete bridge decks at ramps, comprising asphalt concrete, wherein the asphalt concrete comprises SBS modified asphalt, aggregate, and polyester fiber added sequentially and mixed uniformly; the aggregate comprises aggregate and mineral powder.

[0081] The lower layer of the pavement is asphalt concrete, the aggregate is basalt, and the mineral powder is limestone mineral powder; the SBS modified asphalt accounts for 5.6% of the aggregate mass, and the polyester fiber accounts for 0.25% of the total mass of the asphalt concrete.

[0082] The surface layer of the pavement is asphalt concrete, the aggregate is basalt, and the mineral powder is limestone mineral powder; the SBS modified asphalt accounts for 5.8% of the aggregate mass, and the polyester fiber accounts for 0.35% of the total mass of the asphalt concrete.

[0083] The mixing temperature for the lower layer and the upper layer of asphalt concrete is 170℃, and the mixing time is 3 minutes.

[0084] A method for paving a cement concrete bridge deck structure at ramps:

[0085] S1. Construct a cement concrete layer for the bridge foundation, and then roughen the cement concrete layer by removing the surface laitance until the aggregate on the cement concrete surface is exposed.

[0086] S2. Apply a waterproof bonding layer to the surface of the cement concrete layer. The waterproof bonding layer uses emulsified asphalt at a dosage of 0.50 kg / m³. 2 ;

[0087] S3. Lay the lower layer on the waterproof adhesive layer. The thickness of the lower layer is 4cm and the construction temperature is 170℃.

[0088] S4. After roughening the surface of the lower pavement layer by shot blasting or sandblasting, apply the bonding layer to the surface. The bonding layer uses emulsified asphalt at a dosage of 0.50 kg / m². 2 ;

[0089] S5. The top layer is laid on the adhesive layer. The thickness of the top layer is 3cm and the construction temperature is 170℃.

[0090] S6. After construction is completed, traffic can be opened once the temperature of the top layer of asphalt concrete has dropped to 50°C.

[0091] The principles and effects of the above technical solution:

[0092] (1) Due to the thermosetting properties of epoxy asphalt, the epoxy asphalt concrete has excellent mechanical and high-temperature properties, and is suitable for road surfaces at bridge ramps. It can effectively solve the problems of rutting and shoving at high temperatures on such road surfaces.

[0093] (2) Epoxy asphalt is acidic, while waste incineration ash is alkaline, and the two have better adhesion. More importantly, after the epoxy asphalt undergoes a curing reaction, it can coat the waste incineration ash, stabilize and solidify the harmful substances in it, and achieve the de-hazardous disposal of waste incineration ash (mainly waste incineration fly ash).

[0094] (3) Adding municipal solid waste incineration ash to epoxy asphalt concrete not only realizes the resource-based disposal of municipal solid waste incineration ash, but also reduces the use of natural aggregates and environmental protection, and lowers project costs.

[0095] According to the "Test Procedures for Asphalt and Asphalt Mixtures in Highway Engineering" (JTG+E20-2011), the performance indicators of the epoxy asphalt concrete surface layer and the epoxy asphalt concrete bottom layer were tested respectively. The results are shown in Table 1 and Table 2.

[0096] Table 1. Technical Indicators of Epoxy Asphalt Concrete Top Layer for Paving

[0097] Inspection items unit Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Stability (60℃) kN 56.2 53.6 59.1 7.1 8.6 Dynamic stability (60℃) times / mm >20000 >20000 >20000 6300 7000 Bending strain (-10℃) — 3532 3416 3721 2420 2825 Freeze-thaw splitting strength ratio ％ 92.3 90.4 93.5 81.5 85.1

[0098] Table 2 Technical Indicators of Epoxy Asphalt Concrete Lower Layer for Paving

[0099]

[0100]

[0101] Stability reflects mechanical strength; 60℃ stability reflects high-temperature rutting resistance; -10℃ flexural strain reflects low-temperature cracking resistance; and freeze-thaw splitting strength ratio reflects water stability. As shown in the table above, the pavement material of this invention used for cement concrete bridge decks at ramps has significantly better performance than the ordinary pavement materials of Comparative Examples 1 and 2. Meanwhile, Comparative Examples 1 and 2 show that the performance of municipal solid waste incineration ash mixed into ordinary asphalt concrete decreases significantly, resulting in poor treatment effectiveness. However, the performance of municipal solid waste incineration ash mixed into epoxy asphalt concrete does not decrease significantly, and the treatment effect is excellent.

[0102] This application takes the bridge deck pavement structures for ramps prepared in Examples 1-3 and Comparative Examples 1-2 as examples to conduct performance tests. According to the specifications such as (JTG+E20-2011) "Test Procedures for Asphalt and Asphalt Mixtures in Highway Engineering" and (JTG / T3364-02-2019) "Technical Specifications for Design and Construction of Steel Bridge Deck Pavement in Highways", the performance indicators of the bridge deck pavement structures for ramps were tested, and the results are shown in Table 3.

[0103] Table 3 Technical Specifications for Cement Concrete Bridge Deck Pavement Structure

[0104] Inspection items unit Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Dynamic stability (60℃) times / mm >20000 >20000 >20000 6000 6758 With respect to concrete shear strength (60℃) MPa 1.05 1.10 1.07 0.23 0.25 Interlaminar shear strength (60℃) MPa 1.33 1.39 1.37 0.30 0.31

[0105] Dynamic stability at 60℃ reflects high-temperature rutting resistance, and shear strength at 60℃ reflects high-temperature shear resistance. The pavement material of this invention, combined with the pavement structure of this invention, laid on the road surface at the ramp exhibits significantly better high-temperature rutting resistance and high-temperature shear resistance than the ordinary pavement structures of Comparative Examples 1 and 2. The dynamic stability at 60℃ is three times that of the ordinary pavement structure, and the shear strength with concrete at 60℃ and the interlayer shear strength at 60℃ are more than four times that of the ordinary pavement structure, effectively solving the bridge deck defects of cement concrete at ramps.

[0106] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. A paving material for use at a ramp at a cement concrete bridge deck comprising an epoxy asphalt concrete, characterized in that: The epoxy asphalt concrete comprises epoxy asphalt binder, stone and polyester fiber which are added and mixed evenly in sequence, the stone comprises aggregate, mineral powder and slag and fly ash after waste incineration; The epoxy asphalt binder comprises anhydride modified asphalt and epoxy resin; the epoxy resin comprises 30-50 parts of main agent and 15-35 parts of curing agent, the main agent is made of glycidyl ether epoxy resin, hyperbranched epoxy resin and epoxy soybean oil raw material; the curing agent is a mixture of phthalic anhydride, polyether amine and hexadecylamine; the anhydride modified asphalt is one or more of maleic anhydride modified asphalt, butyl succinic anhydride modified asphalt and 2-buten-1-yl succinic anhydride modified asphalt; The mass ratio of fly ash to slag is 1:5-1:7; A paving method for paving material of cement concrete bridge deck at ramp, comprising the following steps, S1, a cement concrete layer is constructed on a bridge base, then the bridge deck is roughened, and surface floating slurry is removed to expose cement concrete surface aggregate; S2, a waterproof bonding layer is constructed on the surface of the cement concrete layer; S3, a paving lower layer is constructed on the surface of the waterproof bonding layer; S4, a bonding layer is constructed on the surface of the paving lower layer after roughening the surface of the paving lower layer; S5, a paving upper layer is constructed on the surface of the bonding layer; S6, after construction, closed curing is carried out, and traffic can be opened after the upper layer of epoxy asphalt concrete is cured by 60%; The upper and lower paving layers are both made of epoxy asphalt binder, the epoxy resin content in the epoxy asphalt binder used in the upper paving layer accounts for 30-50%, and the epoxy asphalt binder accounts for 6.0-8.0% of the mass of the stone; the epoxy resin content in the epoxy asphalt binder used in the lower paving layer accounts for 25-40%, and the epoxy asphalt binder accounts for 5.5-7.5% of the mass of the stone; the waterproof bonding layer and the bonding layer are both made of the same second-order reaction type epoxy resin binder, and the dosage is 0.3-0.6 kg / m 2 .

2. A paving material for use on a ramp at a cement concrete bridge deck according to claim 1, wherein: The glycidyl ether epoxy resin is one or more of bisphenol A glycidyl ether resin, aliphatic glycidyl ether resin, phenolic epoxy resin and brominated epoxy resin.

3. A paving material for use on a ramp at a cement concrete bridge deck according to claim 2, wherein: The slag is bottom ash of furnace bottom after waste incineration, and is treated by crushing, screening, impurity removal, iron removal by magnetic separation and noble metal separation, and has a particle size range of 0-9.5 mm; the fly ash is collected by a flue gas dust collector after waste incineration, and is obtained by water washing, and has a particle size range of 0-0.3 mm, and a mass percentage content of ≤0.075 mm is greater than 75%.

4. A paving material for use on a ramp at a cement concrete bridge deck according to claim 3, wherein: The epoxy asphalt binder accounts for 5.5-8.0% of the mass of the stone, the mixing temperature is 120-180 DEG C, and the mixing time is 2-5 min; the polyester fiber accounts for 0.2-0.5% of the total mass of the epoxy asphalt concrete.

5. A paving material for use at a ramp to a cement concrete bridge deck according to claim 4, wherein: The slag content of the lower layer of epoxy asphalt concrete accounts for 0-50% of the aggregate, and is not 0; the slag content of the upper layer of epoxy asphalt concrete accounts for 0-30% of the aggregate, and is not 0; the fly ash content of the lower layer of epoxy asphalt concrete accounts for 0-100% of the mineral powder, and is not 0; the fly ash content of the upper layer of epoxy asphalt concrete accounts for 0-60% of the mineral powder, and is not 0; the thickness of the paving lower layer is 2.5-5 cm, and the thickness of the paving upper layer is 2.0-3.5 cm.

6. A paving material for use at a ramp to a cement concrete bridge deck according to claim 5, wherein: The paving lower layer in step S3 is paved before the first curing of the two-stage reaction type epoxy resin adhesive and within the bonding validity period; the paving upper layer in step S5 is paved after the first curing of the two-stage reaction type epoxy resin adhesive, within the bonding validity period and after the curing of the paving lower layer by 40%.

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