CN101187193A - A semi-flexible drainage anti-skid noise reduction pavement structure - Google Patents

Abstract

The invention relates to a road paving structure, which is a semi-flexible, draining, antiskid and noise-reducing paving structure and comprises a semi-rigid foundation layer. The invention is characterized in that the semi-rigid foundation layer is paved with a modified emulsified asphalt slurry sealing layer, the sealing layer is filled with a semi-flexible road surface material structure layer on the surface, the semi-flexible road surface material structure layer is distributed with a high-viscosity modified asphalt adhesive layer, and the adhesive layer is paved with a draining, antiskid and noise-reducing abrasion layer. The road paving structure has stable property under high temperature, is provided with draining, noise-reducing and antiskid functions, and can effectively prevent water damages and has long service life.

Description

A semi-flexible drainage anti-skid noise reduction pavement structure

technical field

The invention belongs to the field of material science and engineering, and in particular relates to a road surface pavement structure.

Background technique

With the development of the national economy, the construction of high-grade highways in our country, especially the construction of expressways, has advanced by leaps and bounds. Due to the complex climate environment and poor traffic conditions, many high-grade highways have not been put into use for a long time, and there are different degrees of early damage, such as major diseases such as rutting, water damage and cracking on the asphalt concrete pavement, and cement concrete pavement. Broken boards, cracks, voids and mud pumping damage. Although a large amount of money has been invested in maintenance every year, it is often too much to make up for. Not only is the maintenance investment in the later period large, but it also affects the traffic capacity and driving comfort, causing adverse effects in society. In addition, with the acceleration of my country's urbanization process and the improvement of people's quality of life, high requirements are placed on the use of road surfaces, such as driving safety, comfort and environmental friendliness. How to provide a new type of pavement structure that can meet the road performance and durability as well as the function of use has become a current research hotspot.

Asphalt concrete material and cement concrete material are two main pavement materials of high-grade highways. These two typical pavement materials have been widely used in the pavement structure of urban roads and high-grade highways. However, since asphalt material is a material with strong temperature sensitivity, the strength and rheology of the asphalt pavement structural layer are greatly affected by temperature changes. When the temperature is high in summer, the decrease of the viscosity of the asphalt material leads to the weakening of the cohesion between the aggregate particles. Under the action of the horizontal force, it is very easy to cause sliding and displacement between the asphalt mixture particles, resulting in the formation of waves and wrapping of the asphalt pavement structural layer. The shear deformation damage of the car reduces the driving comfort. On high-grade highways with channelized traffic, the asphalt concrete pavement is prone to excessive plastic deformation and rutting. When the temperature is low in winter, although the strength of the asphalt concrete pavement structural material increases, the deformation resistance is greatly reduced due to the increase of the viscosity of the asphalt material, showing brittleness, resulting in cracking of the asphalt pavement structural layer. Cement concrete pavement materials have the characteristics of strong anti-deformation ability, long service life and low daily maintenance cost, but this pavement structure has disadvantages such as poor driving comfort and difficult repair after pavement structure is damaged.

In recent years, domestic research has been carried out on cement mortar grouting semi-rigid pavement, and the paving of test sections has been carried out. This kind of pavement gives full play to the excellent characteristics of these two typical pavement materials at the same time, and can solve the problems of rutting, water damage and cracking of asphalt concrete pavement and broken board, cracking, hollowing out and mud pumping of cement concrete pavement. But at present, because this kind of pavement is all paved on the wear layer of the pavement, there are following problems: 1) the semi-flexible general elastic modulus of the preparation is relatively large, causing the rigidity of the pavement to increase, and the pavement is easy to crack; 2) the rigidity of the pavement increases, smooth 3) The aesthetics of the road surface is greatly affected.

Therefore, it is important to invent a semi-flexible pavement material with suitable mechanical properties, and use this semi-flexible pavement material as a structural layer to develop a combined pavement structure with functional wear layers such as drainage, noise reduction, and anti-skid. Practical significance.

Contents of the invention

The purpose of the present invention is to provide a semi-flexible drainage anti-slip and noise-reducing pavement structure. The pavement structure has good high-temperature stability, drainage, noise reduction and anti-skid functions, can effectively prevent water damage, and has a long service life.

In order to achieve the above object, the technical solution of the present invention is: a semi-flexible drainage anti-skid noise reduction pavement structure, which includes a semi-rigid base, which is characterized in that the semi-rigid base is covered with a modified emulsified asphalt slurry seal, The semi-flexible pavement material structure layer is poured on the modified emulsified asphalt slurry seal layer, the semi-flexible pavement material structure layer is sprinkled with a high-viscosity modified asphalt adhesive layer, and the high-viscosity modified asphalt adhesive layer is paved with drainage anti-skid Noise-reducing wear layer.

The modified emulsified asphalt slurry seal layer is paved after mixing the following raw materials, and the parts by weight of each raw material are: a) mineral aggregate: 100 parts; b) emulsified asphalt: 15 parts; wherein the mineral aggregate is composed of aggregate and Filler composition, the mass ratio of aggregate to filler is 100:11.1; the aggregate is basalt or diabase, the filler is limestone powder, and the emulsified asphalt is SBR modified emulsified asphalt.

The thickness of the modified emulsified asphalt slurry seal layer is 0.5-1.0 cm.

The thickness of the semi-flexible pavement material structural layer is 10-12 cm, and it is formed by pouring polymer modified cement-based grouting material on the macroporous asphalt mixture matrix on the modified emulsified asphalt slurry seal layer;

The polymer modified cement-based grouting material is composed of the following raw materials, and the weight parts of each raw material are: a) cement: 100 parts; b) fly ash: 50-150 parts; c) emulsified asphalt: 50-160 parts; d) expansion agent: 30-70 parts; e) water reducing agent: 0.5-5 parts; f) sand: 0-80 parts; g) water: 0-50 parts.

The cement is early strength 32.5, 42.5 or 52.5 Portland cement, and can also be ordinary 32.5, 42.5, 52.5 Portland cement; 32.5, 42.5, 52.5 slag cement; 32.5, 42.5, 52.5 fly ash cement; powdered coal The ash is Class I or Class II fly ash.

The emulsified asphalt is medium-cracked or slow-cracked emulsified asphalt with a mass solid content of 55-72%, and can be nonionic, cationic or anionic.

The expansion agent is UEA general type expansion agent; the air-entraining water reducer is Nai series water reducer or polycarboxylate water reducer.

Described sand is common fine river sand, and fineness modulus is 1.9-2.2;

The matrix of macroporous asphalt mixture is composed of the following raw materials, each of which accounts for 100 parts by weight: a) mineral aggregate: 100 parts; b) asphalt: 2.5-4.0 parts; the mineral aggregate is composed of aggregate and filler, aggregate and The mass ratio of the filler is 100:2.0~6.4, the aggregate is basalt or diabase, the filler is limestone powder, the maximum nominal particle size of the mineral is 20mm; the asphalt is heavy traffic asphalt or SBR modified asphalt or SBS modified Asphalt or PE modified asphalt.

The material of the high-viscosity modified asphalt bonding layer is high-viscosity modified asphalt, and the high-viscosity modified asphalt is composed of styrene-butadiene-styrene block copolymer (SBS), activated rubber powder, compatibilizing resin, Composition of antioxidant and base asphalt; the mass ratio of base asphalt, styrene-butadiene-styrene block copolymer, activated rubber powder, compatibilizing resin, and antioxidant is 100:7.4～14.5:2.2～7.6:2.4～ 6.7: 0.2～0.5; Among them, the compatibilizing resin is rosin glycerin resin, terpene resin or petroleum resin, the antioxidant is lead, zinc, carbon black, calcium salt or amine, and the base asphalt is AH-70 heavy traffic asphalt or AH -90 heavy traffic asphalt.

The spreading amount of high-viscosity modified asphalt is 0.6-0.8L/m ² .

The anti-slip, anti-slip and noise-reducing wear layer material for drainage is large-pore asphalt concrete; the large-pore asphalt concrete is composed of mineral aggregate, high-viscosity modified asphalt and fiber, and the mass ratio of mineral aggregate, high-viscosity modified asphalt and fiber is 100:4.0-6.0: 0～0.6; the mineral material is composed of aggregate and filler, the mass ratio of aggregate to filler is 100:2.0～6.4, the aggregate is basalt or diabase, the filler is limestone mineral powder, the maximum nominal weight of the mineral material The particle size is 13mm.

High viscosity modified bitumen is composed of styrene-butadiene-styrene block copolymer (SBS), activated rubber powder, compatibilizing resin, antioxidant and base bitumen; base bitumen, styrene-butadiene-styrene The mass ratio of block copolymer, activated rubber powder, compatibilizing resin and antioxidant is 100: 7.4-14.5: 2.2-7.6: 2.4-6.7: 0.2-0.5; wherein, the compatibilizing resin is rosin glycerin resin and terpene resin Or petroleum resin, the antioxidant is lead, zinc, carbon black, calcium salt or amine, and the base asphalt is AH-70 heavy traffic asphalt or AH-90 heavy traffic asphalt.

The fibers are lignin fibers or polyester fibers or mineral fibers.

The design range of mineral material grading is shown in Table 1:

Table 1 Mineral material gradation range of drainage, anti-skid and noise reduction wear layers

Sieve hole size/mm The mass percentage of mineral materials passing through the following sieve holes/% 16 13.2 9.5 4.75 2.36 1.18 0.6 0.3 0.15 0.075 gradation upper limit gradation lower limit 100100 9690 7065 2211 1610 117 95 73 74 53

Table 2 Mineral gradation range of macroporous asphalt mixture matrix

Sieve hole size/mm The mass percentage of mineral materials passing through the following sieve holes/% 26.5 20 16 13.2 9.5 4.75 2.36 1.18 0.6 0.3 0.15 0.075 gradation upper limit gradation lower limit 100100 10090 9070 8060 6035 2211 1610 117 95 73 73 62

Table 3 Mineral material gradation range of modified emulsified asphalt slurry seal layer

Sieve hole size/mm The mass percentage of mineral materials passing through the following sieve holes/% 9.5 4.75 2.36 1.18 0.6 0.3 0.15 0.075 gradation upper limit gradation lower limit 100100 10090 9065 7045 5030 3018 2110 155

The technical index of main material of the present invention is as follows:

Table 4 Performance indicators of high viscosity modified asphalt

Performance skills requirement Penetration (0.1mm) Penetration Index Softening Point (°C) 15°C Ductility (cm) 60°C Viscosity (Pa·s) Elastic Recovery (%) ≥50≥0.8≥90≥150≥70000≥96

Table 5 Performance indicators of drainage anti-slip and noise reduction asphalt mixture

Performance skills requirement Porosity (%) 20～30

Connected porosity (%) Marshall stability (kN) Dynamic stability at 60°C (times/mm) Freeze-thaw splitting strength ratio (%) ≥16.0≥4.0≥4000≥85.0

Table 6 Performance indicators of semi-flexible pavement materials

Performance skills requirement Porosity (%) Marshall stability (kN) 70°C dynamic stability (times/mm) freeze-thaw splitting strength ratio (%) ≥3.0≥20≥8000≥90.0

The present invention has the following features: 1) High-modulus semi-flexible pavement material is used as the structural layer of the pavement, which has excellent high-temperature stability and can significantly reduce the occurrence of defects such as rutting, pushing, and wrapping. At the same time, after the polymer modified cement-based grouting material is poured, the semi-flexible structural layer is very dense, which can effectively prevent water damage and enhance water stability; 2) The drainage, anti-skid, and noise-reducing wear layers are made of large-pore asphalt concrete, It can improve the safety of high-speed driving in rainy days and effectively reduce noise; 3) High-viscosity modified asphalt is used as the bonding material for the pavement structure layer and the wear layer, which can not only play a good bonding role, but also prevent water 4) The modified emulsified asphalt slurry seal layer is used as the connecting layer between the semi-rigid base and the pavement surface layer, which can not only prevent the infiltration of water, effectively protect the base, but also prevent and Delay the expansion of reflection cracks in the base layer to the surface layer; 5) Based on the above characteristics, the pavement structure will maintain its function within its design life, and only need to maintain and pave the wear layer regularly to maintain the performance of the pavement and prolong the entire life of the pavement. Service life of pavement structures.

Description of drawings

Fig. 1 is a structural representation of the present invention;

In the figure: 1-semi-rigid base layer, 2-modified emulsified asphalt slurry seal layer, 3-semi-flexible pavement material structure layer, 4-high viscosity modified asphalt bonding layer, 5-drainage, anti-skid, noise reduction and wear layer.

Detailed ways

In order to better understand the present invention, the content of the present invention is further illustrated below in conjunction with the examples, but the content of the present invention is not limited to the following examples.

Example 1:

1. Preparation of materials:

(1) Preparation of drainage anti-slip and noise-reducing wear layer (drainage, anti-skid, noise-reduction wear layer) materials:

(1) Preparation of high-viscosity modified asphalt: high-viscosity modified asphalt is composed of styrene-butadiene-styrene block copolymer (SBS), activated rubber powder, compatibilizing resin, antioxidant and matrix asphalt; matrix The mass ratio of asphalt, styrene-butadiene-styrene block copolymer, activated rubber powder, compatibilizing resin and antioxidant is 100: 10.6: 3.7: 2.5: 0.3; wherein, the compatibilizing resin is selected rosin glycerin resin, The antioxidant is carbon black, and the base asphalt is AH-70 heavy traffic asphalt; the specific preparation steps are: melt the base asphalt, mix it with styrene-butadiene-styrene block copolymer and compatibilizing resin, and heat it at 170°C Stir under low pressure for 18 minutes, then use a high-speed emulsifying shearer to shear at a high speed for 350 minutes at a speed of 5500 rpm, then stand at 140°C for 17 minutes to fully swell, add activated rubber powder and antioxidants, and then shear at a high speed In 25 minutes, the high viscosity modified asphalt with a viscosity of 60°C ≥ 70000Pa.s is produced;

(2) Mineral material grading:

The mineral material is composed of aggregate and filler. The mass ratio of aggregate to filler is 100:3.2. The aggregate is made of diabase, and the filler is limestone powder. The maximum particle size of the mineral material is 16mm. Table 7:

Table 7 Grading range of mineral materials

Sieve hole size/mm The mass percentage of mineral materials passing through the following sieve holes/% 16 13.2 9.5 4.75 2.36 1.18 0.6 0.3 0.15 0.075 Synthetic Grading 100 95.1 68.3 21.0 15.1 10.3 8.3 6.9 5.7 4.1

(3) Preparation of macroporous asphalt concrete:

Selection of raw materials: large-porous asphalt concrete is composed of mineral aggregate, high-viscosity modified asphalt and fiber, the mass ratio of mineral aggregate, high-viscosity modified asphalt, and fiber is 100:5.1:0.2; the fiber is polyester fiber;

Preparation: Mix ore, high-viscosity modified asphalt and fibers at a temperature of 180°C, discharge temperature at 180°C, and porosity range of 23.4% to obtain large-porosity asphalt concrete.

(2), the preparation of the high-viscosity modified asphalt bonding course material:

The material of the high-viscosity modified asphalt bonding layer is high-viscosity modified asphalt, and the high-viscosity modified asphalt is composed of styrene-butadiene-styrene block copolymer (SBS), activated rubber powder, compatibilizing resin, antioxidant and base asphalt; the mass ratio of base asphalt, styrene-butadiene-styrene block copolymer, activated rubber powder, compatibilizing resin, and antioxidant is 100:10:5:4:0.3; The resin is petroleum resin, the antioxidant is calcium salt, and the base asphalt is AH-70 heavy traffic asphalt.

(3), preparation of semi-flexible pavement materials:

(1) Preparation of polymer modified cement-based grouting material:

The polymer modified cement-based grouting material is composed of the following raw materials, and the parts by weight of each raw material are: a) cement: 100 parts; b) fly ash: 100 parts; c) emulsified asphalt: 100 parts; d) expansion agent: 50 parts ; e) water reducing agent: 2 parts; f) sand: 20 parts; g) water: 20 parts.

The cement is 32.5, 42.5 or 52.5 slag cement; the fly ash is Class I fly ash.

The emulsified asphalt is a split-type emulsified asphalt with a mass solid content of 55-72%.

The expansion agent is UEA common expansion agent; the air-entraining water reducer is polycarboxylate water reducer.

The sand is ordinary fine river sand with a fineness modulus of 1.9-2.2.

First weigh the solid raw materials (cement, fly ash, expansion agent, water reducer, sand) in proportion, add them together to the mixer and dry mix for 15-50 seconds, then add emulsified asphalt and water and mix for 30-120 seconds , to obtain polymer modified cement-based grouting material.

Another preparation method of the above-mentioned polymer-modified cement-based grouting material is to add all raw materials into a mixer and stir for 30-300 seconds at the same time after weighing all the raw materials according to the example.

(2) Preparation of macroporous asphalt mixture matrix:

The parent body of the macroporous asphalt mixture is composed of the following materials, and the parts by weight of each raw material are: a) mineral aggregate: 100 parts; b) asphalt: 3.0 parts; the mineral aggregate is composed of aggregate and filler, and the mass ratio of aggregate to filler is 100:3.2, the aggregate is limestone, the filler is limestone slag, and the design range of mineral grading is shown in Table 9:

Table 8 Synthetic gradation of aggregates of macroporous asphalt mixture matrix

Sieve hole size/mm The mass percentage of mineral materials passing through the following sieve holes/% 25 20 16 13.2 9.5 4.75 2.36 1.18 0.6 0.3 0.15 0.075 Synthetic Grading 100 90 65 11 10 7 5 3 4 3

The asphalt is SBS modified asphalt, and the asphalt ratio is 3.0%.

(3) Performance of semi-flexible pavement materials

Table 9 Performance indicators of semi-flexible pavement materials

Performance test value Porosity (%) Marshall Stability (kN) Dynamic Stability at 70°C (times/mm) Freeze-Thaw Splitting Strength Ratio (%) Compressive Rebound Modulus (MPa) 2.723.51450089.32100

(4) Modified emulsified asphalt slurry seal material:

The modified emulsified asphalt slurry seal layer material is composed of the following raw materials in parts by weight: a) mineral aggregate: 100 parts; b) emulsified asphalt: 15.0 parts.

The mineral material is composed of aggregate and filler. The mass ratio of aggregate to filler is 100:11.1. The aggregate is selected from basalt or diabase, and the filler is limestone slag. The design range of mineral material gradation is shown in Table 11:

The emulsified asphalt is used as SBR modified emulsified asphalt.

Table 11 Mineral material gradation range of modified emulsified asphalt slurry seal layer

Sieve hole size/mm The mass percentage of mineral materials passing through the following sieve holes/% 9.5 4.75 2.36 1.18 0.6 0.3 0.15 0.075 Synthetic Grading 100 96.1 73.5 56.9 37.3 20.8 13.7 10.7

(5) Preparation of semi-rigid base:

The semi-rigid base layer is composed of the following raw materials, and the parts by weight of each raw material are: a) mineral material: 100 parts; b) cement: 5 parts; c) water: 5 parts.

The mineral material can be limestone or granite, and the mineral material grading is shown in Table 12:

Table 12 Mineral material grading of semi-rigid base course

Sieve hole size/mm The mass percentage of mineral materials passing through the following sieve holes/% 37.5 26.5 19 9.5 4.75 2.36 1.18 0.6 0.075 Synthetic Grading 100 86.1 73.6 66.9 52.7 40.3 36.8 23.4 15.1

Second, the paving process (as shown in Figure 1):

1) Pave the modified emulsified asphalt slurry seal layer material on the treated semi-rigid base 1 to form a modified emulsified asphalt slurry seal layer 2, the thickness of the modified emulsified asphalt slurry seal layer 2 is 0.8cm, construction The process is the same as that of general slurry sealing and micro-surfacing;

2) Spread the large-porosity asphalt mixture matrix on the modified emulsified asphalt slurry seal layer 2. In order to ensure the porosity and interconnected pore structure, the steel wheel should be fully static-pressed during the rolling process, and the rolling times should not exceed 3 times, the paving thickness is 10cm;

After the macroporous asphalt mixture parent body is cooled, pour the polymer modified cement-based grouting material on the macroporous asphalt mixture matrix layer, and scrape it with a rubber scraper until the pores of the macroporous asphalt mixture matrix layer are filled, and then Scrape it; get semi-flexible pavement material structure layer 3;

3) After 7 days of maintenance, heat-sprinkle high-viscosity modified asphalt on the semi-flexible pavement material structural layer 3 to form a high-viscosity modified asphalt bonding layer 4 (as a water-releasing bonding layer), and the spreading amount is 0.7L/m2.

4) Then pave large-porous asphalt concrete on the high-viscosity modified asphalt bonding layer 4 to form a drainage, anti-skid, noise-reducing wear layer 5 with a thickness of 3 to 4 cm; It is advisable for the degree to reach 98-100%.

Example 2:

1. Preparation of materials:

(1) The semi-rigid base layer is composed of the following raw materials, and the parts by weight of each raw material are: a) Mineral material: 100 parts; b) Cement: 5 parts; c) Water: 5 parts.

The mineral material can be limestone or granite, and the mineral material gradation is shown in Table 12.

(2) Modified emulsified asphalt slurry seal material:

The modified emulsified asphalt slurry seal layer is formed by mixing the following raw materials, and the parts by weight of each raw material are: a) mineral aggregate: 100 parts; b) emulsified asphalt: 15 parts; wherein the mineral aggregate is composed of aggregate and filler, The mass ratio of aggregate to filler is 100:11.1; the aggregate is basalt, the filler is limestone powder, and the emulsified asphalt is SBR modified emulsified asphalt.

(3) The semi-flexible pavement material structure layer is formed by pouring polymer modified cement-based grouting material on the macroporous asphalt mixture matrix on the modified emulsified asphalt slurry seal layer;

The polymer modified cement-based grouting material is composed of the following raw materials, and the parts by weight of each raw material are: a) cement: 100 parts; b) fly ash: 50 parts; c) emulsified asphalt: 50 parts; d) expansion agent: 30 parts ; e) water reducer: 0.5 parts; f) sand: 1 part; g) water: 1 part.

The cement is Portland cement with early strength 32.5, 42.5 or 52.5; the fly ash is Class I fly ash.

The emulsified asphalt is a split-type emulsified asphalt with a mass solid content of 55-72%.

The expansion agent is UEA common expansion agent; the air-entraining water reducer is FND-1 water reducer.

Described sand is common fine river sand, and fineness modulus is 1.9-2.2;

The macroporous asphalt mixture parent body is made up of the following raw materials, and each raw material accounts for: a) Mineral material: 100 parts; b) Asphalt: 2.5 parts; The described mineral material is composed of aggregate and filler, and the ratio of aggregate and filler is The mass ratio is 100:2.0, the aggregate is basalt, the filler is limestone powder, the maximum nominal particle size of the mineral is 20mm; the asphalt is heavy traffic asphalt.

(4) The material of the high-viscosity modified asphalt bonding layer is high-viscosity modified asphalt, and the high-viscosity modified asphalt is composed of styrene-butadiene-styrene block copolymer (SBS), activated rubber powder, compatibilizer Composition of resin, antioxidant and matrix asphalt; the mass ratio of matrix asphalt, styrene-butadiene-styrene block copolymer, activated rubber powder, compatibilizing resin, and antioxidant is 100:7.4:2.2:2.4:0.2; Among them, the compatibilizing resin is rosin glycerin resin, the antioxidant is lead, and the base asphalt is AH-70 heavy traffic asphalt.

(5) The anti-slip and noise-reducing wear layer material for drainage is large-pore asphalt concrete; the large-pore asphalt concrete is composed of mineral aggregate, high-viscosity modified asphalt and fiber, and the mass ratio of mineral aggregate, high-viscosity modified asphalt and fiber is 100: 4.0:0.1; the mineral material is composed of aggregate and filler, the mass ratio of aggregate to filler is 100:2.0, the aggregate is basalt, the filler is limestone powder, and the maximum nominal particle size of the mineral material is 13mm.

High viscosity modified bitumen is composed of styrene-butadiene-styrene block copolymer (SBS), activated rubber powder, compatibilizing resin, antioxidant and base bitumen; base bitumen, styrene-butadiene-styrene The mass ratio of block copolymer, activated rubber powder, compatibilizing resin and antioxidant is 100:7.4:2.2:2.4:0.2; wherein, the compatibilizing resin is rosin glycerin resin, the antioxidant is lead, and the base asphalt is selected from AH-70 Heavy traffic asphalt.

The fibers are lignin fibers.

Second, the paving process:

1) Pave the modified emulsified asphalt slurry seal layer asphalt material on the treated semi-rigid base 1 to form a modified emulsified asphalt slurry seal layer 2, the thickness of the modified emulsified asphalt slurry seal layer 2 is 0.5cm, The construction process is the same as that of general slurry seal and micro-surfacing;

2) Spread the large-porosity asphalt mixture matrix on the modified emulsified asphalt slurry seal layer 2. In order to ensure the porosity and interconnected pore structure, the steel wheel should be fully static-pressed during the rolling process, and the rolling times should not exceed 3 times, the paving thickness is 10cm;

After the macroporous asphalt mixture parent body is cooled, pour the polymer modified cement-based grouting material on the macroporous asphalt mixture matrix layer, and scrape it with a rubber scraper until the pores of the macroporous asphalt mixture matrix layer are filled, and then Scrape it; get semi-flexible pavement material structure layer 3, the thickness of semi-flexible pavement material structure layer is 10～12cm;

3) After 7 days of maintenance, heat-sprinkle high-viscosity modified asphalt on the semi-flexible pavement material structural layer 3 to form a high-viscosity modified asphalt adhesive layer 4 (as a water-release adhesive layer), and the amount of high-viscosity modified asphalt sprayed is 0.6L /m ² .

4) Then pave large-porous asphalt concrete on the high-viscosity modified asphalt bonding layer 4 to form a draining, anti-skid, noise-reducing wear layer 5 with a thickness of 3 cm; steel wheel static pressure is used throughout the rolling process, and the compaction degree reaches 98-100% is suitable.

Example 3:

1. Preparation of materials:

(1) The semi-rigid base layer is composed of the following raw materials, and the parts by weight of each raw material are: a) Mineral material: 100 parts; b) Cement: 5 parts; c) Water: 5 parts.

The mineral material can be limestone or granite, and the mineral material gradation is shown in Table 12.

(2) The modified emulsified asphalt slurry seal layer is formed by mixing the following raw materials, and the parts by weight of each raw material are: a) Mineral material: 100 parts; b) Emulsified asphalt: 15 parts; wherein the mineral material is made of aggregate The mass ratio of aggregate to filler is 100:11.1; the aggregate is diabase, the filler is limestone slag, and the emulsified asphalt is SBR modified emulsified asphalt.

(3) The semi-flexible pavement material structure layer is formed by pouring polymer modified cement-based grouting material on the macroporous asphalt mixture matrix on the modified emulsified asphalt slurry seal layer;

The polymer modified cement-based grouting material is composed of the following raw materials, and the parts by weight of each raw material are: a) cement: 100 parts; b) fly ash: 150 parts; c) emulsified asphalt: 160 parts; d) expansion agent: 70 parts ; e) water reducer: 5 parts; f) sand: 80 parts; g) water: 50 parts.

The cement is ordinary 32.5, 42.5, 52.5 Portland cement; the fly ash is Class II fly ash.

The emulsified asphalt is slow-cracking emulsified asphalt with a mass solid content of 55-72%.

The expansion agent is UEA common expansion agent; the air-entraining water reducer is polycarboxylate water reducer.

Described sand is common fine river sand, and fineness modulus is 1.9-2.2;

The parent body of the macroporous asphalt mixture is composed of the following raw materials, and the parts by weight of each raw material are: a) mineral material: 100 parts; b) asphalt: 4.0 parts; The mass ratio is 100:6.4, the aggregate is made of diabase, the filler is limestone powder, and the maximum nominal particle size of the mineral is 20mm; the asphalt is SBR modified asphalt.

(4) The material of the high-viscosity modified asphalt bonding layer is high-viscosity modified asphalt, and the high-viscosity modified asphalt is composed of styrene-butadiene-styrene block copolymer (SBS), activated rubber powder, compatibilizer Composition of resin, antioxidant and matrix asphalt; the mass ratio of matrix asphalt, styrene-butadiene-styrene block copolymer, activated rubber powder, compatibilizing resin, and antioxidant is 100:14.5:7.6:6.7:0.5; Among them, the compatibilizing resin is terpene resin, the antioxidant is zinc, and the base asphalt is AH-90 heavy traffic asphalt.

(5) The material of the anti-slip, anti-slip and noise-reducing wear layer for drainage is large-pore asphalt concrete; the large-pore asphalt concrete is composed of mineral aggregate, high-viscosity modified asphalt and fiber, and the mass ratio of mineral aggregate, high-viscosity modified asphalt and mineral fiber is 100 : 6.0: 0.6; described mineral material is made up of aggregate and filler, and the mass ratio of aggregate and filler is 100: 6.4, and aggregate is diabase, and filler is limestone mineral powder, and the maximum nominal particle diameter of mineral material is 13mm.

High viscosity modified bitumen is composed of styrene-butadiene-styrene block copolymer (SBS), activated rubber powder, compatibilizing resin, antioxidant and base bitumen; base bitumen, styrene-butadiene-styrene The mass ratio of block copolymer, activated rubber powder, compatibilizing resin and antioxidant is 100:14.5:7.6:6.7:0.5; wherein, the compatibilizing resin is terpene resin, the antioxidant is carbon black, and the base pitch is AH- 90 heavy traffic asphalt.

The fibers are mineral fibers.

Second, the paving process:

1) Pave the modified emulsified asphalt slurry seal layer asphalt material on the treated semi-rigid base 1 to form a modified emulsified asphalt slurry seal layer 2, the thickness of the modified emulsified asphalt slurry seal layer 2 is 1.0cm, The construction process is the same as that of general slurry seal and micro-surfacing;

2) Spread the large-porosity asphalt mixture matrix on the modified emulsified asphalt slurry seal layer 2. In order to ensure the porosity and interconnected pore structure, the steel wheel should be fully static-pressed during the rolling process, and the rolling times should not exceed 3 times, the pavement thickness is 12cm;

After the macroporous asphalt mixture parent body is cooled, pour the polymer modified cement-based grouting material on the macroporous asphalt mixture matrix layer, and scrape it with a rubber scraper until the pores of the macroporous asphalt mixture matrix layer are filled, and then Scrape it; get semi-flexible pavement material structure layer 3;

3) After 7 days of maintenance, heat-sprinkle high-viscosity modified asphalt on the semi-flexible pavement material structure layer 3 to form a high-viscosity modified asphalt adhesive layer 4 (as a water-release adhesive layer), and the amount of high-viscosity modified asphalt sprayed is 0.8L /m ² .

4) Then pave large-porous asphalt concrete on the high-viscosity modified asphalt bonding layer 4 to form a drainage, anti-skid, noise-reducing wear layer 5 with a thickness of 3 to 4 cm; It is advisable for the degree to reach 98-100%.

Claims (9)

1. A semi-flexible drainage anti-slip and noise-reducing pavement structure, which comprises a semi-rigid base, is characterized in that a modified emulsified asphalt slurry seal is paved on the semi-rigid base, and the modified emulsified asphalt slurry seal is poured There is a semi-flexible pavement material structure layer, a high-viscosity modified asphalt bonding layer is sprinkled on the semi-flexible pavement material structure layer, and a drainage, anti-slip, noise-reducing and wear-reducing layer is spread on the high-viscosity modified asphalt bonding layer. 2. A semi-flexible drainage anti-slip and noise-reducing pavement structure according to claim 1, characterized in that: the modified emulsified asphalt slurry seal layer is paved after mixing the following raw materials, and the weight of each raw material is Parts are: a) Mineral material: 100 parts; b) Emulsified asphalt: 15 parts; wherein the mineral material is composed of aggregate and filler, and the mass ratio of aggregate to filler is 100:11.1; the aggregate is basalt or diabase, The filler is limestone powder, and the emulsified asphalt is SBR modified emulsified asphalt. 3. A semi-flexible drainage anti-slip and noise-reducing pavement structure according to claim 1, characterized in that: the thickness of the modified emulsified asphalt slurry seal layer is 0.5-1.0 cm. 4. A kind of semi-flexible drainage anti-slip noise-reducing pavement structure according to claim 1, characterized in that: said semi-flexible pavement material structure layer is modified emulsified asphalt slurry seal layer by polymer modified It is formed by pouring permanent cement-based grouting material on the matrix of large-pore asphalt mixture; The polymer modified cement-based grouting material is composed of the following raw materials, and the weight parts of each raw material are: a) cement: 100 parts; b) fly ash: 50-150 parts; c) emulsified asphalt: 50-160 parts; d) expansion agent: 30-70 parts; e) water reducing agent: 0.5-5 parts; f) sand: 0-80 parts; g) water: 0-50 parts. The matrix of macroporous asphalt mixture is composed of the following raw materials, each of which accounts for 100 parts by weight: a) mineral aggregate: 100 parts; b) asphalt: 2.5-4.0 parts; the mineral aggregate is composed of aggregate and filler, aggregate and The mass ratio of the filler is 100:2.0~6.4, the aggregate is basalt or diabase, the filler is limestone powder, and the maximum nominal particle size of the mineral material is 20mm; the asphalt is heavy traffic asphalt or SBR modified asphalt or SBS modified Asphalt or PE modified asphalt. 5. A semi-flexible drainage anti-slip and noise-reducing pavement structure according to claim 1, characterized in that: the thickness of the semi-flexible pavement material structure layer is 10-12 cm. 6. A kind of semi-flexible drainage anti-slip and noise-reducing pavement structure according to claim 1, characterized in that: the material of the high-viscosity modified asphalt bonding layer is high-viscosity modified asphalt, high-viscosity modified asphalt Composed of styrene-butadiene-styrene block copolymer, activated rubber powder, compatibilizing resin, antioxidant and base bitumen; base bitumen, styrene-butadiene-styrene block copolymer, activated rubber powder , compatibilizing resin, the mass ratio of antioxidant is 100: 7.4～14.5: 2.2～7.6: 2.4～6.7: 0.2～0.5; Wherein, compatibilizing resin is rosin glycerin resin, terpene resin or petroleum resin, and antioxidant is lead , zinc, carbon black, calcium salt or amines, the base asphalt is selected from AH-70 heavy traffic asphalt or AH-90 heavy traffic asphalt. 7. A semi-flexible drainage, anti-slip and noise-reducing pavement structure according to claim 6, characterized in that the amount of high-viscosity modified asphalt spread is 0.6-0.8 L/m ² . 8. A semi-flexible drainage anti-slip and noise-reducing pavement structure according to claim 1, characterized in that: the material of the drainage anti-slip and noise-reduction wear layer is large-pore asphalt concrete; The mass ratio of mineral aggregate, high-viscosity modified asphalt, and fiber is 100:4.0～6.0:0～0.6; the mineral aggregate is composed of aggregate and filler, and the mass ratio of aggregate to filler is 100:2.0～6.4, the aggregate is basalt or diabase, the filler is limestone powder, and the maximum nominal particle size of the mineral is 13mm. 9. A kind of semi-flexible drainage anti-slip and noise-reducing pavement structure according to claim 8, characterized in that: the high-viscosity modified asphalt is composed of styrene-butadiene-styrene block copolymer, activated rubber powder, Composition of compatibilizing resin, antioxidant and base asphalt; the mass ratio of base asphalt, styrene-butadiene-styrene block copolymer, activated rubber powder, compatibilizing resin and antioxidant is 100:7.4～14.5:2.2～ 7.6: 2.4~6.7: 0.2~0.5; Among them, the compatibilizing resin is rosin glycerin resin, terpene resin or petroleum resin, the antioxidant is lead, zinc, carbon black, calcium salt or amine, and the base pitch is AH-70 heavy Traffic asphalt or AH-90 heavy traffic asphalt.

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