Anti-skid and long-life assembled bio-based modified pavement and preparation process thereof

Abstract

The invention discloses an anti-skid and long-service-life assembled bio-based modified pavement and a preparation process of the anti-skid and long-service-life assembled bio-based modified pavement. According to the assembly type bio-based modified pavement with the lasting function, main diseases existing in a current pavement are effectively solved from the aspects of water sealing, cracking prevention, high skid resistance and the like, the pavement has the advantages that a carpet type pavement is conventionally rollable and convenient and rapid to construct, and due to the high-performance characteristics of a cementing material and a binding material, the pavement is extremely thin and is only 3-7 mm in thickness, so that the pavement has the lasting function. And the composite material has the characteristics of high toughness (the elongation at break can reach 20-50%), high elasticity and high binding power, can be bent and folded, can inhibit multi-scale cracks of the existing pavement structure, and can still ensure the overall effect of the composite material even if a wide crack of 2cm is reached.

Description

Technical Field

[0001] The present invention belongs to the technical field of pavement, and in particular relates to an assembled bio-based modified pavement with long-lasting anti-skid life and a preparation process thereof. Background Art

[0002] Transportation is a basic and leading industry, and an important support and strong guarantee for social and economic development. Most highways use semi-rigid base asphalt pavement, which has long suffered from reflective cracks and serious water damage. In addition, due to the influence of external conditions such as large traffic volume, high overload ratio, complex and changeable climate and terrain during the service period, as well as internal factors such as fast aggregate polishing and low asphalt adhesion, the early anti-skid performance of the pavement decays rapidly, thus creating potential traffic safety hazards. According to statistics, 60~70% of the pavements are re-surfaced or repaired before the design service life because the anti-skid performance does not meet the current national standards, and the structural life does not match the required functional life.

[0003] At present, expressways are approaching or exceeding their designed service life. Common maintenance measures require thick repair layers and long construction periods, which have a great impact on transportation efficiency and safety service levels. The present invention aims to provide an assembled bio-based modified pavement with a long anti-skid life, so as to solve the problems of short life of road surface water sealing, crack prevention and road surface anti-skid function at a relatively low cost. Summary of the invention

[0004] In view of the above problems, the first object of the present invention is to provide a bonding material for bio-based modified pavements, and the second object of the present invention is to provide an assembled bio-based modified pavement with a long-lasting anti-slip life based on the bonding material and a preparation process thereof.

[0005] The first object of the present invention is achieved by providing a bonding material for bio-based modified pavement, comprising bonding material A and bonding material B; The bonding material A is obtained by uniformly mixing high-viscosity modified asphalt, silane coupling agent, EVA, dodecylbenzene sulfonic acid, natural rubber and bio-oil in a mass ratio of 100:0.1-2:2-7:0.1-1.5:2-8:2-7; the VA content of the EVA is between 28% and 40%; The bonding material B comprises two components B which are stored separately A and B B , wherein the B A For epoxy resin, the B B The mixture is obtained by uniformly mixing various materials such as bio-based modified asphalt, a bulking agent, tung oil acid liver and p-methylphenyl biguanide hydrochloride compound curing agent, and a curing accelerator in a mass ratio of 100:5~15:7~75:0.01~6; the mass ratio of epoxy resin to bio-based modified asphalt is 5~30:100; The bio-based modified asphalt is prepared by adding 0.5-10% bio-oil and 3-8% natural rubber to 70#A grade base asphalt and stirring evenly; The mass ratio of elaeutrophic acid to p-methylphenyl biguanide hydrochloride is 7-9:1-3; The compatibilizer is one or both of aromatic oil and cycloparaffinic oil with an aromatic content of not less than 85%.

[0006] The second object of the present invention is achieved by providing a prefabricated bio-based modified pavement with a long-lasting anti-skid life based on the bonding material, wherein the prefabricated bio-based modified pavement is composed of a bonding layer, a water-sealing support layer, and a high anti-skid epoxy pre-coated mixed material pavement with a long-lasting function from bottom to top; The material used for the bonding layer is bonding material A or bonding material B; The water sealing support layer adopts a reinforced fiber cloth base impregnated with an impregnating material; the impregnating material adopts an adhesive material different from that of the bonding layer; if the bonding layer adopts adhesive material A, the impregnating material adopts adhesive material B, and vice versa; The high anti-slip epoxy pre-coated mixture is composed of the following raw materials in parts by weight: 85-90 parts of epoxy pre-coated high wear-resistant aggregate, 2-10 parts of mineral powder, 5-8 parts of binder and 0.2-0.6 parts of bio-based cellulose material; The epoxy pre-coated high wear-resistant aggregate is composed of an epoxy resin, a composite curing agent of elaeutrophic acid and p-methylphenyl biguanide hydrochloride in a mass ratio of 0.1-0.3:0.15-0.9:100, and a high wear-resistant aggregate; the epoxy resin is E51 or E44; the mass ratio of elaeutrophic acid and p-methylphenyl biguanide hydrochloride is 7-9:1-3; The highly wear-resistant aggregate is one or more of steel slag, highly wear-resistant basalt aggregate, high-strength sandstone aggregate, diabase aggregate or sedimentary minerals; The steel slag is blast furnace slag or electric arc furnace slag; the sedimentary mineral is corundum or quartz sand; The binder is bonding material A or bonding material B; The bio-based cellulose material is one or more of coconut shells, palm plant extracts, bagasse, flax, and coffee grounds.

[0007] The preparation process of the fabricated bio-based modified pavement with long-lasting anti-skid life is achieved by the following steps: 1) Preparation of water-sealing support layer: fully unfold the reinforced fiber cloth base and immerse it in a bonding material at 165-185°C, then stretch and control the weight of the impregnated material to evenly spread it to obtain a water-sealing support layer with a thickness of 0.4-1.5 mm; 2) Preparation of bonding layer: using a mist spraying device, evenly spraying bonding material on the bottom surface of the water sealing support layer to obtain a bonding layer; 3) Preparation of prefabricated bio-based modified pavement: Spread the bottom surface of the water-sealing supporting layer of the sprayed bonding layer on the isolation membrane, and place the isolation membrane on a base surface that can withstand the rolling construction of the functional pavement; spray a layer of bonding material the same as the bonding layer on the surface of the water-sealing supporting layer, and then evenly spread the high-slip epoxy pre-coated mixture on the water-sealing supporting layer, and then compact it into shape to obtain a functional pavement with a dense lower part and connected surface pores; the thickness of the functional pavement is only 3mm~7mm.

[0008] The functional and durable assembled bio-based modified pavement provided by the present invention effectively solves the main problems existing in the current road surface in terms of water sealing, crack prevention and high skid resistance. In addition to having the conventional rollable function of carpet-type pavement and convenient and fast construction, due to the high performance characteristics of the binder and the adhesive material, the pavement thickness is extremely thin (the thickness is only 3mm~7mm), and has high toughness (elongation at break can reach 20~50%), high elasticity and high adhesion, can be bent and folded, and can suppress multi-scale cracks in the existing road surface structure. Even if the cracks reach a width of 2cm, the overall effect of the present invention can still be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a structural diagram of the assembled bio-based modified pavement of the present invention; Figure 2 It is a cross-sectional view of the assembled bio-based modified pavement of the present invention; Figure 3 This is a diagram of the preparation process of the assembled bio-based modified pavement of the present invention. DETAILED DESCRIPTION

[0010] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, but the present invention is not limited in any way. Any changes or improvements made based on the teachings of the present invention fall within the protection scope of the present invention.

[0011] The present invention provides a bonding material for bio-based modified pavement, comprising bonding material A and bonding material B; The bonding material A is obtained by uniformly mixing high-viscosity modified asphalt, silane coupling agent, EVA, dodecylbenzene sulfonic acid, natural rubber and bio-oil in a mass ratio of 100:0.1-2:2-7:0.1-1.5:2-8:2-7; the VA content of the EVA is between 28% and 40%; The bonding material B comprises two components B which are stored separately A and B B , where B A For epoxy resin, B BThe mixture is obtained by uniformly mixing various materials such as bio-based modified asphalt, a bulking agent, tung oil acid liver and p-methylphenyl biguanide hydrochloride compound curing agent, and a curing accelerator in a mass ratio of 100:5~15:7~75:0.01~6; the mass ratio of epoxy resin to bio-based modified asphalt is 5~30:100; The bio-based modified asphalt is prepared by adding 0.5-10% bio-oil and 3-8% natural rubber to 70#A grade base asphalt and stirring evenly; The mass ratio of the composite curing agent of elaeus oil liver and p-methylphenyl biguanide hydrochloride is 7-9:1-3; The compatibilizer is one or both of aromatic oil and cycloparaffinic oil with an aromatic content of not less than 85%.

[0012] The epoxy resin is E51 or E44.

[0013] The preparation method of the bonding material A is as follows: 1) Heat the high-viscosity modified asphalt to 175-185°C and place it in a high-speed shearing machine with a shear rate of 30,000 times / min or more; slowly start the shearing machine, and when the speed reaches 2,000 rpm, add the bio-oil to the high-viscosity modified asphalt in the high-speed shearing machine at one time, and heat it to ensure that the temperature of the high-viscosity modified asphalt after adding the bio-oil is between 165-185°C; 2) Then slowly add EVA, natural rubber, dodecylbenzene sulfonic acid and silane coupling agent in order, gradually increase the shear rate, and when the heating temperature of the mixture is not less than 175°C, increase the shear rate to the maximum, and continue shearing for 30 minutes to 1 hour. After the mixture is evenly dispersed, the bonding material A is obtained.

[0014] The method for preparing asphalt in the bio-based modified asphalt is as follows: 1) Heat the No. 70 A-grade road petroleum-based asphalt to 155-165°C, and then place it in a high-speed shearing machine with a shear rate of more than 30,000 times / min; slowly start the shearing machine, and when the speed reaches 2,000 rpm, add the bio-oil to the road petroleum-based asphalt in the high-speed shearing machine at one time, and heat it to ensure that the asphalt temperature after adding the bio-oil is between 155 and 165°C; 2) Then slowly add the natural rubber in the required amount, gradually increase the shear rate, and when the mixture is heated to no less than 165°C, increase the shear rate to the maximum, and continue shearing for 30 minutes to 1 hour. After the mixture is evenly dispersed, the bio-based modified asphalt is obtained.

[0015] The silane coupling agent is prepared by mixing 3-(2-aminoethyl)-aminopropyltriethoxysilane and vinyltriethoxysilane in a mass ratio of 30-80:70-20; The curing accelerator is one or more of imidazole, tertiary amine curing agent, DMP-30 or benzyl dimethylamine, mixed with acetylacetonate chromium latent curing accelerator in a mass ratio of 50-90:10-50; The natural rubber is prepared by mixing natural rubber latex and eucommia gum in a mass ratio of 90-98:2-10.

[0016] The bonding material B B The preparation method is as follows: 1) Heat the composite curing agent of eleostearic acid liver and p-methylphenyl biguanide hydrochloride to 80-100°C according to the amount, place it in a sealed container with a stirrer and stir it evenly, then slowly add acetylacetonate chromium latent curing accelerator according to the amount, and finally add other curing accelerators at one time according to the amount, seal and stir for 20-30 minutes to stir evenly, and then place it for 3-8 hours to obtain a curing agent mixture; 2) Heat the bio-based modified asphalt to 155~165℃, and then place it in a high-speed shearing machine with a shear rate of more than 30,000 times / min. Slowly start the shearing machine, and when the speed reaches 2000 rpm, add the extender to the bio-based modified asphalt in the high-speed shearing machine at one time, and heat it to ensure that the temperature of the bio-based modified asphalt after adding the extender is between 155~165℃; 3) Slowly add the curing agent mixture according to the amount, gradually increase the shear rate, increase the shear rate to the maximum, and continue shearing for 30min~1h. After the mixture is evenly dispersed, the bonding material B is obtained. B The temperature of this process is controlled between 120~135℃.

[0017] When the bonding material B is used, first A Heat to 60~80℃, then mix with B heated to 120~135℃ B Mix and stir well.

[0018] The present invention also provides an assembled bio-based modified pavement with a long-lasting anti-skid life based on the bonding material, wherein the assembled bio-based modified pavement is composed of a bonding layer, a water-sealing support layer, and a high anti-skid epoxy pre-coated mixed material pavement with a long-lasting function from bottom to top; The material used for the bonding layer is bonding material A or bonding material B; The water sealing support layer adopts a reinforced fiber cloth base impregnated with an impregnating material; the impregnating material adopts an adhesive material different from that of the bonding layer; if the bonding layer adopts adhesive material A, the impregnating material adopts adhesive material B, and vice versa; The high anti-slip epoxy pre-coated mixture is composed of the following raw materials in parts by weight: 85-90 parts of epoxy pre-coated high wear-resistant aggregate, 2-10 parts of mineral powder, 5-8 parts of binder and 0.2-0.6 parts of bio-based cellulose material; The epoxy pre-coated high wear-resistant aggregate is composed of epoxy resin, elaeutrophic acid liver and p-methylphenyl biguanide hydrochloride compound curing agent and high wear-resistant aggregate in a mass ratio of 0.1-0.3:0.15-0.9:100; the epoxy resin is E51 or E44; the mass ratio of elaeutrophic acid liver and p-methylphenyl biguanide hydrochloride compound curing agent is 7-9:1-3; The highly wear-resistant aggregate is one or more of steel slag, highly wear-resistant basalt aggregate, high-strength sandstone aggregate, diabase aggregate or sedimentary minerals; The steel slag is blast furnace slag or electric arc furnace slag; the sedimentary mineral is corundum or quartz sand; The binder is bonding material A or bonding material B; The bio-based cellulose material is one or more of coconut shells, palm plant extracts, bagasse, flax, and coffee grounds.

[0019] The reinforcing fiber cloth base is a twill or satin fiber cloth woven from polymer reinforcing fibers or mineral fibers; The polymer reinforcing fiber is spun rayon fiber, polyester fiber or polyacrylonitrile polymer reinforcing fiber; The mineral fiber is carbon fiber or basalt fiber; When the assembled bio-based modified paving is applied to the rigid structure surface, a twill or satin fiber cloth woven from mineral fiber cloth is used; When applied to the surface of flexible or semi-flexible layer structure, twill or satin fiber cloth woven from spun nylon fiber or polyester fiber is used.

[0020] The preparation method of the high-slip epoxy pre-coated mixture is as follows: first, the epoxy resin and the curing agent are heated to 74°C respectively and mixed in proportion, and then added to the high-wear-resistant aggregate with a particle size of 2.36-4.75 mm at 180°C and mixed to obtain the epoxy pre-coated high-wear-resistant aggregate. In this process, the epoxy resin film thickness of the high-wear-resistant aggregate pre-coated needs to be controlled to be 7-20 μm; then, the epoxy pre-coated high-wear-resistant aggregate, the bio-based cellulose material, the mineral powder heated to 180°C, and the binder heated to 175°C are quickly and fully stirred to form the high-slip epoxy pre-coated mixture.

[0021] The present invention further provides a process for preparing the anti-skid and long-lasting assembled bio-based modified pavement, which is achieved by the following steps: 1) Preparation of water-sealing support layer: fully unfold the reinforced fiber cloth base and immerse it in a bonding material at 165-185°C, then stretch and control the weight of the impregnated material to evenly spread it to obtain a water-sealing support layer with a thickness of 0.4-1.5 mm; 2) Preparation of bonding layer: using a mist spraying device, evenly spraying bonding material on the bottom surface of the water sealing support layer to obtain a bonding layer; 3) Preparation of prefabricated bio-based modified pavement: Spread the bottom surface of the water-sealing supporting layer of the sprayed bonding layer on the isolation membrane, and place the isolation membrane on a base surface that can withstand the rolling construction of the functional pavement; spray a layer of bonding material the same as the bonding layer on the surface of the water-sealing supporting layer, and then evenly spread the high-slip epoxy pre-coated mixture on the water-sealing supporting layer, and then compact it into shape to obtain a functional pavement with a dense lower part and connected surface pores; the thickness of the functional pavement is only 3mm~7mm.

[0022] The present invention further provides a process for preparing the anti-skid and long-lasting assembled bio-based modified pavement, which is achieved by the following steps: 1) Preparation of water-sealing support layer: After the reinforced fiber cloth base is fully unfolded, it is immersed in the bonding material at 165-185°C, and then stretched and the weight of the impregnated material is controlled to evenly spread to obtain a water-sealing support layer with a thickness of 0.4-1.5 mm; 2) Evenly spread the high-slip epoxy pre-coated mixture on the newly-made and unsolidified water-sealing support layer, compact it with rolling equipment and make it fully bonded with the water-sealing support layer. The forming thickness should be controlled at 3mm~7mm; 3) Turn over the water-sealing support layer to which the highly anti-slip epoxy pre-coated mixture has been bonded, and evenly apply the bonding material on the back thereof. After affixing the isolation film, fold or curl it for storage, and finally form a prefabricated bio-based modified pavement with durable functions.

[0023] The raw materials used in the present invention are known products commercially available in the prior art. As the preferred conditions of the present invention, the raw material specifications are as follows: The model of the base asphalt is A-grade 70# petroleum asphalt produced by PetroChina in Anning, Yunnan; Natural rubber latex is a high-solid rubber latex produced and processed from Yunnan rubber trees, with a solid content of no less than 70%; The bio-oils are tung oil and sesame oil, both of which are extracts or products from local plants in Yunnan.

[0024] Example 1 Preparation of bonding material A This embodiment provides a method for preparing a bonding material A: the bonding material A is composed of high-viscosity modified asphalt, a silane coupling agent, dodecylbenzene sulfonic acid, natural rubber, and bio-oil. The raw materials include the following components by weight: High viscosity modified asphalt 100 parts 0.5 parts of silane coupling agent, wherein 0.35 parts of 3-(2-aminoethyl)-aminopropyltriethoxysilane 0.15 parts of vinyl triethoxysilane Dodecylbenzenesulfonic acid 0.3 parts Ethylene-vinyl acetate copolymer (EVA) 5 parts 4 parts of natural rubber, including: 3.92 parts of natural latex 0.08 parts of Duzhong glue 2 parts of bio-oil, including: 1.8 parts tung oil 0.2 parts of sesame oil The preparation method of the bonding material A is as follows: (1) Heat 100 parts of high-viscosity modified asphalt to 175-185°C and place it in a high-speed shearing machine with a shear rate of more than 30,000 times / min. Slowly start the shearing machine, and when the speed reaches 2,000 rpm, add 1.8 parts of tung oil and 0.2 parts of sesame oil to the high-viscosity modified asphalt in the high-speed shearing machine at one time, and heat it to ensure that the temperature of the high-viscosity modified asphalt after adding bio-oil is between 165 and 185°C; (2) Then, EVA, natural rubber latex, rubber styrene, dodecylbenzenesulfonic acid, 3-(2-aminoethyl)-aminopropyltriethoxysilane and vinyltriethoxysilane are slowly added in sequence, and the shear rate is gradually increased. When the mixture is heated to a temperature not lower than 175°C, the shear rate is increased to the maximum, and the shearing is continued for 55 minutes to complete the preparation of bonding material A.

[0025] Example 2 Preparation of bonding material A This embodiment provides a method for preparing a bonding material A, which is composed of the following raw materials in parts by mass: 100 parts of high-viscosity modified asphalt, 7 parts of EVA, 7 parts of natural rubber (5 parts of natural rubber latex, 2 parts of swellable rubber), 4 parts of bio-oil (3.6 parts of tung oil, 0.4 parts of sesame oil), and the remaining raw material composition, mass parts and preparation method are the same as those in Example 1.

[0026] Comparative Example 1 The difference between the bonding material prepared in Comparative Example 1 and Example 1 is that no bio-oil is added to the raw materials, and other raw material components and preparation methods are the same as those in Example 1.

[0027] Comparative Example 2 The difference between the bonding material prepared in Comparative Example 2 and Example 1 is that no natural rubber is added to the raw materials, and the other raw material components and preparation method are the same as those in Example 1.

[0028] Comparative Example 3 The difference between the bonding material prepared in Comparative Example 3 and Example 1 is that no bio-oil and natural rubber are added to the raw materials, and the other raw material components and the preparation method are the same as those in Example 1.

[0029] The main performance index detection methods and data of the bonding materials prepared in Examples 1-2 and Comparative Examples 1-3 are shown in Table 1.

[0030] Table 1 Main performance index parameters of bonding material A prepared in Example 1 and Example 2 Example 3 Preparation of bonding material B This embodiment provides a method for preparing a bonding material B: the bonding material B is composed of bio-based modified asphalt, a compatibilizer, an epoxy resin, a composite curing agent of elaeutrophic acid and p-methylphenyl biguanide hydrochloride, and a curing accelerator. The raw materials include the following components by weight: Bio-based modified asphalt 100 parts 10 parts of extender Epoxy resin E51 10 parts 18 parts of curing agent, including: 16 servings of Tung oil liver 2 parts of p-methylphenyl biguanide hydrochloride 1.5 parts of curing accelerator, including: N,N-dimethylbenzylamine (BDMA) 0.8 parts Chromium acetylacetonate latent type 0.7 parts The preparation method of the bio-based modified asphalt is as follows: (1) Heat 100 parts of 70#A grade road petroleum base asphalt to between 155 and 165°C, and then place it in a high-speed shearing machine with a shearing rate of more than 30,000 times / min. Slowly start the shearing machine until the speed reaches 2,000 rpm; (2) Add 3 parts of tung oil and 2 parts of sesame oil to the road petroleum-based asphalt in the high-speed shearing machine at one time, and heat the asphalt to ensure that the temperature of the asphalt after adding the bio-oil is between 155 and 165°C; (3) Then, 4 parts of natural rubber latex with a solid content of 75% and 0.3 parts of styrene rubber are slowly added in sequence, and the shear rate is gradually increased. When the heating temperature of the mixture is not less than 165°C, the shear rate is increased to the maximum and the shearing is continued for 30 min to 1 h. After the mixture is evenly dispersed, the preparation of bio-based modified asphalt is completed.

[0031] The bonding material B B The preparation method is as follows: (1) Heat 16 parts of eleostearic acid liver and 2 parts of p-methylphenyl biguanide hydrochloride compound curing agent to 80-100°C, place in a sealed container with a stirrer and stir evenly, then slowly add acetylacetonate chromium latent curing accelerator according to quantity, and finally add other curing accelerators at once according to quantity, seal and stir for 25 minutes, and then place for 5 hours to obtain a curing agent mixture; (2) Heat 100 parts of bio-based modified asphalt to 155-165°C, and then place it in a high-speed shearing machine with a shear rate of more than 30,000 times / min. Slowly start the shearing machine until the speed reaches 2,000 rpm; (3) Adding aromatic oil with an aromatic content of 92% to the bio-based modified asphalt in the high-speed shearing machine at one time, and heating to ensure that the temperature of the bio-based modified asphalt after adding the extender is between 155 and 165 °C; (4) Finally, slowly add the curing agent mixture according to the amount, gradually increase the shear rate, increase the shear rate to the maximum, and continue shearing for 30 minutes to 1 hour. The preparation is completed after the mixture is evenly dispersed. The temperature of the preparation process is controlled between 120 and 135°C.

[0032] When using adhesive material B, first heat epoxy resin E51 to 60~80℃, then mix with B heated to 120~135℃ according to the amount. B Mix and stir well.

[0033] Example 4 Preparation of bonding material B This embodiment provides a method for preparing a bonding material B, which is composed of the following raw materials in parts by mass: 100 parts of bio-based modified asphalt, 13 parts of KN4010 cyclohexane oil, 15 parts of epoxy resin E51, 27 parts of tung oil acid liver, and 3 parts of p-methylphenyl biguanide hydrochloride. The composition, mass fraction and preparation method of the remaining raw materials are the same as those in Example 3.

[0034] Comparative Example 4 The difference between the bonding material prepared in Comparative Example 2 and Example 3 is that no natural rubber is added to the bio-based modified asphalt raw material, and the other raw material components and preparation method are the same as those in Example 3.

[0035] Comparative Example 5 The difference between the bonding material prepared in Comparative Example 4 and Example 3 is that no bio-oil is added to the bio-based modified asphalt raw material, and the other raw material components and preparation method are the same as those in Example 3.

[0036] The main performance index test methods and results of the bonding materials prepared in Examples 4-5 and Comparative Examples 4-5 are as follows: Table 2 Main performance indicators of bonding material B prepared in Example 4 and Example 5 Example 5 Preparation of water sealing support layer After the polyester fiber cloth base is fully unfolded, it is immersed in the binder prepared in Example 3, i.e., bonding material B, at 145-155°C for 0.5-1 min. Then, the impregnated material is stretched and the weight of the impregnated material is controlled to be evenly spread to obtain a water-sealing supporting layer with a thickness of 0.4-1.5 mm. According to the GB / T 18840-2018 method, its performance indicators are measured as shown in Table 3.

[0037] Example 6 Preparation of water sealing support layer Compared with Example 5, the binder in step 1 of this embodiment is the bonding material A prepared in Example 1, the infiltration temperature is 175-185°C, and other conditions remain unchanged, and a water-sealing support layer with a thickness of 0.4-1.5 mm is obtained. According to the GB / T 18840-2018 method, the performance index comparison is shown in Table 3.

[0038] Table 3 Main performance parameters of the water sealing support layer The main performance indicators of the polyester fiber cloth in Example 5 and Example 6 that meet the requirements for the base material for asphalt waterproofing membrane (GB / T 18840-2018) are shown in Table 4.

[0039] Table 4 Main technical properties of polyester fiber cloth base Example 7 Preparation of bio-based modified pavement like Figure 1 and Figure 2 As shown, a prefabricated bio-based modified pavement with long-lasting anti-skid life is composed of three parts from bottom to top: a bonding layer, a water-sealing support layer formed by a reinforced fiber cloth base and its impregnated material, and a high anti-skid epoxy pre-wrapped mixture with long-lasting function; its total thickness is 6mm. Its preparation method is as follows: 1. Preparation of high anti-slip epoxy pre-coated mixture (1) heating epoxy resin E51, eleostearic acid and p-methylphenyl biguanide hydrochloride in a ratio of 9:1 to 74°C respectively, and mixing them in a ratio of 1:2 to obtain a mixture of epoxy resin and curing agent; (2) 60 parts of blast furnace slag with a particle size of 2.36-4.75 mm and 40 parts of corundum are mixed and heated to 180°C to obtain a high wear-resistant aggregate, and then a mixture of epoxy resin and a curing agent with a mass of 5‰ of the high wear-resistant aggregate is added and stirred to obtain epoxy pre-coated high wear-resistant aggregate; (3) 87 parts of epoxy pre-coated high wear-resistant aggregate, 0.5 parts of palm plant extract, 6.5 parts of mineral powder heated to 180°C and 6 parts of bonding material A prepared in Example 1 heated to 175°C were mixed, and finally stirred for 120 seconds using a mixing equipment to achieve uniform mixing, thereby obtaining a high anti-slip epoxy pre-coated mixture.

[0040] 2. Preparation of prefabricated bio-based modified pavement with long-lasting anti-slip life: (1) Spreading the high-slip resistant epoxy pre-coated mixture onto the water-sealing support layer prepared in Example 5, and compacting the high-slip resistant epoxy pre-coated mixture by a rolling device to fully bond it to the water-sealing support layer; (2) On the paved surface of high-slip epoxy pre-coated mixture, use a mist spray device to evenly spray the bonding material B on the bottom surface, with a dosage of 0.3kg. / m 2 Finally, an isolation film is placed on the bottom and then folded or curled for storage. Finally, a functional and durable assembled bio-based modified pavement with a thickness of 5.8 mm is obtained. Its basic properties are tested, as shown in Tables 5 and 6.

[0041] Example 8 Preparation of bio-based modified pavement 1. Preparation of high anti-slip epoxy pre-coated mixture (1) heating epoxy resin E51, eleostearic acid and p-methylphenyl biguanide hydrochloride in a ratio of 9:1 to 74°C respectively, and mixing them in a ratio of 1:2 to obtain a mixture of epoxy resin and curing agent; (2) 60 parts of blast furnace slag with a particle size of 2.36-4.75 mm and 40 parts of corundum are mixed and heated to 180°C to obtain a high wear-resistant aggregate, and then a mixture of epoxy resin and a curing agent with a mass of 5‰ of the high wear-resistant aggregate is added and stirred to obtain epoxy pre-coated high wear-resistant aggregate; (3) 87 parts of epoxy pre-coated high wear-resistant aggregate, 0.5 parts of palm plant extract, 6.5 parts of mineral powder heated to 180°C and 6 parts of bonding material B prepared in Example 3 heated to 175°C were mixed, and finally mixed for 120 seconds using a mixing equipment to achieve uniform mixing, thereby obtaining a high anti-slip epoxy pre-coated mixture.

[0042] 2. Preparation of prefabricated bio-based modified pavement with long-lasting anti-slip life (1) Spreading the high-slip resistant epoxy pre-coated mixture onto the water-sealing support layer prepared in Example 6, and compacting the high-slip resistant epoxy pre-coated mixture by a rolling device to fully bond it to the water-sealing support layer; (2) On the paved surface of high-slip epoxy pre-coated mixture, use a mist spray device to evenly spray bonding material A on the bottom surface at a rate of 0.3 kg / m 2Finally, an isolation film is placed on the bottom and then folded or curled for storage. The final molding is a functional and durable assembled bio-based modified pavement with a thickness of 5.6 mm. Its basic performance is tested, as shown in Table 5.

[0043] Comparative Example 6 The difference between the pavement prepared in this comparative example and Example 7 is that the high wear-resistant aggregate is common basalt aggregate, and the other raw materials and preparation methods are the same as those in Example 7. The basic properties of the pavement obtained by testing are shown in Table 5.

[0044] Comparative Example 7 The difference between the pavement prepared in this comparative example and Example 7 is that no palm plant extract is added to the high anti-slip epoxy pre-coated mixture, and other raw materials and preparation methods are the same as those in Example 7. The basic properties of the pavement obtained by testing are shown in Table 5.

[0045] Comparative Example 8 The difference between the pavement prepared in this comparative example and Example 7 is that the binder in the water-sealing supporting layer is commercially available high-viscosity asphalt, and the other raw materials and preparation methods are the same as those in Example 7. The basic properties of the pavement obtained by testing are shown in Table 5.

[0046] Comparative Example 9 The difference between the pavement prepared in this comparative example and Example 8 is that the binder in the water-sealing supporting layer is commercially available high-viscosity asphalt, and the other raw materials and preparation methods are the same as those in Example 7. The basic properties of the pavement obtained by testing are shown in Table 5.

[0047] Table 5 Performance parameters of assembled bio-based modified pavement in Examples 7-8 The anti-skid life of the pavement prepared in Example 7 and the commonly used SBS modified SMA-13 ​​asphalt mixture was tested, and the test results are shown in Table 6.

[0048] Table 6 Anti-skid life test data of assembled bio-based modified pavement in Example 7 From Table 6, it can be seen that the accelerated polishing time of the common SBS modified SMA-13 ​​asphalt mixture with insufficient anti-skid performance is only 4 hours; in actual engineering applications, affected by the traffic volume and highway line type differences, the actual anti-skid function life is 3 to 6 years. The high anti-skid life of the assembled structure of the present invention is 25 times or more than that of the existing structure, and it is a structure with a long anti-skid function life.

[0049] From Tables 5 and 6, it can be seen that the assembled bio-based modified pavement prepared by the present invention has high toughness (elongation at break can reach 20-50%), high elasticity and high adhesion, long anti-slip life, and good water-sealing and anti-cracking properties.

Claims

1. A bonding material for bio-based modified paving, characterized in that: The bonding material includes bonding material A and bonding material B; The bonding material A is obtained by uniformly mixing high-viscosity modified asphalt, silane coupling agent, EVA, dodecylbenzene sulfonic acid, natural rubber and bio-oil in a mass ratio of 100:0.1-2:2-7:0.1-1.5:2-8:2-7; the VA content of the EVA is between 28% and 40%; The bonding material B comprises two components B which are stored separately A and B B , wherein the B A For epoxy resin, B B The mixture is obtained by uniformly stirring the bio-based modified asphalt, the bulking agent, the curing agent prepared by mixing tung oil acid liver and p-methylphenyl biguanide hydrochloride in a mass ratio of 100:5-15:7-75:0.01-6, and the curing accelerator; the mass ratio of the epoxy resin to the bio-based modified asphalt is 5-30:100; The bio-based modified asphalt is prepared by adding 0.5-10% bio-oil and 3-8% natural rubber to 70#A grade base asphalt and stirring evenly; The mass ratio of elaeutrophic acid to p-methylphenyl biguanide hydrochloride is 7-9:1-3; The compatibilizer is one or both of aromatic oil and naphthenic oil with an aromatic content of not less than 85%; The epoxy resin is E51 or E44.

2. The bonding material for bio-based modified paving according to claim 1, characterized in that: The preparation method of the bonding material A is as follows: 1) Heat the high-viscosity modified asphalt to 175-185°C and place it in a high-speed shearing machine with a shear rate of more than 30,000 times / min; slowly start the shearing machine, and when the speed reaches 2,000 rpm, add the bio-oil to the high-viscosity modified asphalt in the high-speed shearing machine at one time, and heat it to ensure that the temperature of the high-viscosity modified asphalt after adding the bio-oil is between 165-185°C; 2) Slowly add EVA, natural rubber, dodecylbenzene sulfonic acid and silane coupling agent in order, gradually increase the shear rate, and when the heating temperature of the mixture is not less than 175°C, increase the shear rate to the maximum, and continue shearing for 30 minutes to 1 hour. After the mixture is evenly dispersed, the bonding material A is obtained.

3. The bonding material for bio-based modified paving according to claim 1, characterized in that: The method for preparing asphalt in the bio-based modified asphalt is as follows: 1) Heat the No. 70 Grade A road petroleum-based asphalt to 155-165°C, and then place it in a high-speed shearing machine with a shear rate of more than 30,000 times / min; slowly start the shearing machine, and when the speed reaches 2,000 rpm, add the bio-oil to the road petroleum-based asphalt in the high-speed shearing machine at one time, and heat it to ensure that the temperature of the road petroleum-based asphalt after adding the bio-oil is between 155 and 165°C; 2) Slowly add natural rubber in quantity, gradually increase the shear rate, and when the heating temperature of the mixture is not less than 165°C, increase the shear rate to the maximum and continue shearing for 30 minutes to 1 hour. After the mixture is evenly dispersed, the bio-based modified asphalt is obtained.

4. The bonding material for bio-based modified paving according to claim 1, characterized in that: The silane coupling agent is prepared by mixing 3-(2-aminoethyl)-aminopropyltriethoxysilane and vinyltriethoxysilane in a mass ratio of 30-80:70-20; The curing accelerator is one or more of imidazole, tertiary amine curing agent, DMP-30 or benzyl dimethylamine, mixed with acetylacetonate chromium latent curing accelerator in a mass ratio of 50-90:10-50; The natural rubber is prepared by mixing natural rubber latex and eucommia gum in a mass ratio of 90-98:2-10.

5. The bonding material for bio-based modified paving according to claim 1, characterized in that: The bonding material B B The preparation method is as follows: 1) Heat the curing agent prepared by mixing eleostearic acid liver and p-methylphenyl biguanide hydrochloride to 80-100°C, place in a sealed container with a stirrer and stir evenly, then slowly add acetylacetonate chromium latent curing accelerator according to the amount, and finally add other curing accelerators at one time according to the amount, seal and stir for 20-30 minutes, and place for 3-8 hours to obtain a curing agent mixture; 2) Heat the bio-based modified asphalt to 155-165°C, and then place it in a high-speed shearing machine with a shear rate of more than 30,000 times / min; slowly start the shearing machine, and when the speed reaches 2,000 rpm, add the extender to the bio-based modified asphalt in the high-speed shearing machine at one time, and heat it to ensure that the temperature of the bio-based modified asphalt after adding the extender is between 155-165°C; 3) Slowly add the curing agent mixture according to the amount, gradually increase the shear rate, increase the shear rate to the maximum, and continue shearing for 30min~1h. After the mixture is evenly dispersed, the bonding material B is obtained. B The temperature of this process is controlled between 120~135℃.

6. An assembled bio-based modified pavement with a long-lasting anti-slip life based on the bonding material of claim 1, characterized in that: The fabricated bio-based modified pavement is composed of a bonding layer, a water-sealing support layer and a durable and highly anti-slip epoxy pre-coated mixed material pavement from bottom to top; The material used for the bonding layer is bonding material A or bonding material B; The water sealing support layer is made of a reinforced fiber cloth base impregnated with an impregnating material; the impregnating material is made of a bonding material different from that of the bonding layer; The high anti-slip epoxy pre-coated mixture is composed of the following raw materials in parts by weight: 85-90 parts of epoxy pre-coated high wear-resistant aggregate, 2-10 parts of mineral powder, 5-8 parts of binder and 0.2-0.6 parts of bio-based cellulose material; The epoxy pre-coated high wear-resistant aggregate is composed of epoxy resin, elaeutrophic acid liver and p-methylphenyl biguanide hydrochloride compound curing agent and high wear-resistant aggregate in a mass ratio of 0.1-0.3:0.15-0.9:100; the epoxy resin is E51 or E44; the mass ratio of elaeutrophic acid liver and p-methylphenyl biguanide hydrochloride is 7-9:1-3; The highly wear-resistant aggregate is one or more of steel slag, highly wear-resistant basalt aggregate, high-strength sandstone aggregate, diabase aggregate or sedimentary minerals; The steel slag is blast furnace slag or electric arc furnace slag; the sedimentary mineral is corundum or quartz sand; The binder is bonding material A or bonding material B; The bio-based cellulose material is one or more of coconut shells, palm plant extracts, bagasse, flax, and coffee grounds.

7. The assembled bio-based modified pavement according to claim 6 is characterized in that: The reinforcing fiber cloth base is a twill or satin fiber cloth woven from polymer reinforcing fibers or mineral fibers; The polymer reinforcing fiber is spun rayon fiber, polyester fiber or polyacrylonitrile polymer reinforcing fiber; The mineral fiber is carbon fiber or basalt fiber; When the assembled bio-based modified paving is applied to the rigid structure surface, a twill or satin fiber cloth woven from mineral fiber cloth is used; When applied to the surface of flexible or semi-flexible layer structure, twill or satin fiber cloth woven from spun nylon fiber or polyester fiber is used.

8. The assembled bio-based modified pavement according to claim 6 is characterized in that: The preparation method of the high-slip epoxy pre-coated mixture is as follows: first, the epoxy resin and the curing agent are heated to 74°C respectively and mixed in proportion, and then added to the high-wear-resistant aggregate with a particle size of 2.36-4.75 mm at 180°C and mixed to obtain the epoxy pre-coated high-wear-resistant aggregate. In this process, the epoxy resin film thickness of the high-wear-resistant aggregate pre-coated needs to be controlled to be 7-20 μm; then, the epoxy pre-coated high-wear-resistant aggregate, the bio-based cellulose material, the mineral powder heated to 180°C, and the binder heated to 175°C are quickly and fully stirred to form the high-slip epoxy pre-coated mixture.

9. The process for preparing the anti-skid and long-lasting assembled bio-based modified pavement according to claim 6, characterized in that: To do this, follow these steps: 1) Preparation of water-sealing support layer: fully unfold the reinforced fiber cloth base and immerse it in a bonding material at 165-185°C, then stretch and control the weight of the impregnated material to evenly spread it to obtain a water-sealing support layer with a thickness of 0.4-1.5 mm; 2) Preparation of bonding layer: using a mist spraying device, evenly spraying bonding material on the bottom surface of the water sealing support layer to obtain a bonding layer; 3) Preparation of assembled bio-based modified pavement: spread the bottom surface of the water-sealing supporting layer of the sprayed bonding layer on the isolation membrane, and place the isolation membrane on a base surface that can withstand the rolling construction of the functional pavement; spray a layer of bonding material the same as the bonding layer on the surface of the water-sealing supporting layer, and then evenly spread the high-slip epoxy pre-coated mixture on the water-sealing supporting layer, and then compact it into shape to obtain a functional pavement with a dense lower part and connected surface pores; the thickness of the functional pavement is 3~7mm.

10. The process for preparing the anti-skid and long-lasting assembled bio-based modified pavement according to claim 6, characterized in that: To do this, follow these steps: 1) Preparation of water-sealing support layer: After the reinforced fiber cloth base is fully unfolded, it is immersed in the bonding material at 165-185°C, and then stretched and the weight of the impregnated material is controlled to evenly spread to obtain a water-sealing support layer with a thickness of 0.4-1.5 mm; 2) Evenly spread the high-slip epoxy pre-coated mixture on the newly made and unsolidified water-sealing support layer, compact it with rolling equipment and make it fully bonded with the water-sealing support layer. The forming thickness should be controlled at 3mm~7mm; 3) Turn over the water-sealing support layer to which the highly anti-slip epoxy pre-coated mixture has been bonded, and evenly apply the bonding material on the back thereof. After affixing the isolation film, fold or curl it for storage, and finally form a prefabricated bio-based modified pavement with durable functions.

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