High-durability asphalt concrete reservoir basin impermeable material and application method thereof

Abstract

The invention belongs to the technical field of anti-seepage materials, and particularly relates to a high-durability asphalt concrete reservoir basin anti-seepage material and an application method thereof. The high-durability asphalt concrete reservoir basin impermeable material comprises the following components in parts by weight: 152.0-186.0 parts of coarse aggregate; 358.0 to 426.0 parts by weight of a fine aggregate; 84.0 to 125.0 parts by weight of mineral powder; 40.0 to 52.0 parts by weight of matrix asphalt; 8.0 to 10.0 parts by weight of epoxy resin; 5.5-6.2 parts by weight of a curing agent; 1.5 to 6.0 parts by weight of an asphalt auxiliary agent; 1.5-3.5 parts by weight of an epoxy resin auxiliary agent; 3.0 to 8.0 parts of modified polyurethane resin; the epoxy resin auxiliary agent is selected from at least one of methyl methacrylate, 2-ethylhexyl acrylate and tridecafluorooctyl methacrylate. The high-durability asphalt concrete reservoir basin impermeable material disclosed by the invention has remarkable impermeability and long durability.

Description

Technical Field

[0001] The present invention belongs to the technical field of anti-seepage materials, and particularly relates to a high-durability asphalt concrete basin anti-seepage material and its application method. Background Art

[0002] Asphalt concrete is an important building material commonly used in engineering construction such as roads, bridges, airport runways, etc. Its main components include asphalt and aggregates. Due to its excellent compressive strength, water resistance, and good construction performance, asphalt concrete is widely used in various civil engineering projects. However, in some special projects, especially in occasions where waterproof and anti-seepage performance is required, the anti-seepage performance of traditional asphalt concrete materials is insufficient. Especially in important water body protection projects such as basins, how to ensure the long-term stability and anti-seepage effect of the materials is an urgent technical problem to be solved.

[0003] In the fields of water conservancy, environmental protection, etc., the anti-seepage requirements for basins are extremely strict. Especially in large-scale water storage systems such as dams, artificial lakes, and reservoirs, the anti-seepage performance of asphalt concrete is crucial. Although traditional asphalt concrete materials have shown some performance in waterproofing and anti-seepage, due to their physical properties, with the increase of service time, the asphalt material will age due to external environmental influences (such as temperature difference changes, ultraviolet radiation, water vapor penetration, etc.), resulting in cracks on the material surface, thus losing good anti-seepage effect. In addition, the construction process of traditional asphalt concrete basin anti-seepage materials is relatively complex, with high requirements for construction technology. There may be leakage problems caused by loose joints or improper construction during the construction process. Especially in large-scale basin projects, due to the long construction time and complex construction environment, the anti-seepage effect of joints and connection parts often fails to meet expectations, resulting in leakage phenomena, affecting the service life and safety of the overall project.

[0004] Therefore, developing an asphalt concrete anti-seepage material with high durability, high anti-seepage performance, and suitable for large-scale basin projects has become an urgent need in the current technological development. Summary of the Invention

[0005] The purpose of the present invention is to provide a high-durability asphalt concrete basin anti-seepage material and its application method. The basin anti-seepage material of the present invention can maintain good anti-seepage effect during long-term use, and at the same time has strong crack resistance, anti-aging property, and the ability to adapt to various environmental changes.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: In the first aspect of the present invention, a high-durability asphalt concrete reservoir anti-seepage material is provided, which comprises: 152.0 - 186.0 parts by weight of coarse aggregate; 358.0 - 426.0 parts by weight of fine aggregate; 84.0 - 125.0 parts by weight of mineral powder; 40.0 - 52.0 parts by weight of matrix asphalt; 8.0 - 10.0 parts by weight of epoxy resin; 5.5 - 6.2 parts by weight of curing agent; 1.5 - 6.0 parts by weight of asphalt additive; 1.5 - 3.5 parts by weight of epoxy resin additive; 3.0 - 8.0 parts of modified polyurethane resin; The epoxy resin additive is selected from at least one of methyl methacrylate, isooctyl acrylate, and tridecafluorooctyl methacrylate.

[0007] Further, the asphalt additive is 1.5 - 2.2 parts by weight of asphalt first additive, and the asphalt first additive is selected from one, two, or three of propylene glycol methyl ether, dipropylene glycol methyl ether, and dipropylene glycol butyl ether.

[0008] Further, the asphalt first additive is a mixture of propylene glycol methyl ether and dipropylene glycol methyl ether in a weight ratio of 1:2 - 5.

[0009] Further, the asphalt additive is 3.0 - 6.0 parts by weight of asphalt second additive, and the asphalt second additive is selected from one or two of propylene glycol diacetate and hexamethylene diisocyanate.

[0010] Further, the asphalt second additive is 4.0 - 4.6 parts by weight of hexamethylene diisocyanate.

[0011] Further, the raw materials for preparing the modified polyurethane resin include, by weight: 40 - 60 parts of polyether polyol, 20 - 35 parts of isophorone diisocyanate, 5 - 15 parts of polyvinylpyrrolidone, 1 - 5 parts of dihydroxy diphenyl sulfone, 1 - 10 parts of trimethylolpropane, and 0.05 - 0.5 parts of organic bismuth catalyst.

[0012] Further, the modified polyurethane resin is prepared according to the following method: (a) Mix polyether polyol, 1 - 5 parts of polyvinylpyrrolidone, and dihydroxy diphenyl sulfone, and heat to dehydrate to obtain a dehydrated mixture; (b) Cool the dehydrated mixture obtained in step (a), add isophorone diisocyanate under nitrogen protection, and at the same time add organic bismuth catalyst, and stir and react to obtain a prepolymer with isocyanate end groups; (c) Add the remaining polyvinylpyrrolidone to the prepolymer obtained in step (b), and continue stirring; (d) After the stirring in step (c) is completed, add trimethylolpropane, and continue to react for 20 - 60 minutes to block the residual isocyanate groups and terminate the reaction to obtain the modified polyurethane resin.

[0013] Further, the temperature of the heat dehydration in step (a) is 90 - 120 °C, and the time is 1 - 3 hours.

[0014] Further, the temperature of the cooling in step (b) is 60 - 90 °C, the time of the stirring reaction is 2 - 5 hours, and the organic bismuth catalyst is one of bismuth octoate, bismuth neodecanoate or bismuth trihydroxybenzoate.

[0015] Further, the temperature of the reaction in step (c) is 60 - 90 °C, and the time is 1 - 3 hours.

[0016] The modified polyurethane resin of the present invention uses polyether polyol and isophorone diisocyanate to react to form a prepolymer, and polyvinylpyrrolidone is introduced for modification to construct a polyurethane network system with enhanced polarity and flexibility. The pyrrolidone ring structure contained in the polyvinylpyrrolidone molecule has amide groups and carbonyl groups. These polar functional groups can form hydrogen bonds and dipole interactions with hydroxyl groups, amino groups or carbonyl groups in the polyurethane system, constructing a physical association network in the system, thereby improving the polarity, dispersion stability and interfacial compatibility of the resin. Polyvinylpyrrolidone can also form multi-point interactions with polar components (such as hydroxyl groups and carboxyl groups) in asphalt, enhancing the compatibility between polyurethane and asphalt; at the same time, its polar chain segments can also form an adsorption effect with the surface of mineral powder or aggregates, improving the interfacial bonding strength. At the structural level, the introduction of polyvinylpyrrolidone can effectively adjust the flexibility and stress buffering ability of the polyurethane system without destroying the main chain structure, enhancing its thermal stability and aging resistance, thus helping the anti-seepage material to maintain structural integrity in a complex environment and improving crack resistance and long-term durability.

[0017] The present invention first proposes to introduce polyvinylpyrrolidone as a polar physical modification component into the polyurethane system, and use its hydrogen bond association and interfacial adsorption characteristics to regulate the overall performance of the asphalt anti-seepage material. This modification method is different from the existing conventional paths of multi-carboxyl grafting or cross-linking, providing a new modification strategy with a more flexible interfacial action mechanism and more controllable structure construction, opening up a new direction for the application of polyurethane resin in high-performance asphalt anti-seepage materials.

[0018] Further, the particle size of the coarse aggregate is 1.56 - 20 mm; the particle size of the fine aggregate is 0.08 - 1.55 mm.

[0019] Further, the mineral powder is one or more of fly ash, potassium feldspar powder, and talc powder.

[0020] Further, the curing agent is one or two of hexamethylenediamine and m-xylenediamine.

[0021] The second aspect of the present invention provides an application method of the above-mentioned high-durability asphalt concrete basin anti-seepage material, including the following steps: (1) Heat the base asphalt to 150 - 160 °C, stir until the base asphalt is completely melted, add epoxy resin, asphalt additives, epoxy resin additives and modified polyurethane resin into the melted base asphalt according to the ratio, and continue stirring to obtain an asphalt-resin mixture; (2) Pre-mix the coarse aggregate and fine aggregate to obtain a mixed aggregate, then add mineral powder to the mixed aggregate, stir to obtain a mixture of aggregate and mineral powder, and add it to the asphalt-resin mixture, continue stirring to obtain a mixture; (3) Add a curing agent to the mixture obtained in step (2), heat to 170 - 175 °C, and stir at this temperature for 20 - 30 minutes, then carry out the construction of the reservoir basin.

[0022] Further, the reservoir basin is constructed in upper and lower layers. When constructing the lower layer of the reservoir basin, the asphalt additive in the high-durability asphalt concrete reservoir basin anti-seepage material is the second asphalt additive at this time; after the construction of the lower layer of the reservoir basin is completed, continue to construct the upper layer of the reservoir basin, and the asphalt additive in the high-durability asphalt concrete reservoir basin anti-seepage material is the first asphalt additive at this time.

[0023] Compared with the prior art, the advantages and beneficial effects of the present invention are: The present invention provides a high-durability asphalt concrete reservoir basin anti-seepage material, which has excellent anti-permeability and long-term durability. By optimizing the combination ratio of coarse aggregate, fine aggregate, mineral powder, base asphalt, epoxy resin, specific additives and modified polyurethane resin, the material is significantly improved in terms of crack resistance, anti-aging property and environmental adaptability. The specially introduced modified polyurethane resin can form multi-point intercalation and strong interfacial bonding between asphalt and mineral powder, aggregate, effectively enhancing the overall structural stability and interfacial bonding performance of the material, and improving the water damage resistance and anti-fatigue performance. In key water body protection projects such as reservoir basins, the material can long-term resist the damage caused by external environmental factors such as temperature difference, humidity, water pressure, etc., prevent the generation of micro-cracks and leakage, so as to ensure the stable and lasting performance of the anti-seepage layer. In addition, the synergistic effect of epoxy resin and curing agent further improves the structural compactness, combined with the good flexibility and construction compatibility of polyurethane resin, making the construction process simpler, the overall project quality more reliable, significantly extending the service life and improving the project safety. Specific Embodiments

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0025] Unless otherwise specified, the raw materials used in the examples are ordinary commercially available products. The following is an exemplary description: Coarse aggregate, supplied by Sichuan Zhuolang New Environmental Protection Building Materials Co., Ltd., with a particle size of 1.56 - 20 mm; Fine aggregate, supplied by Sichuan Zhuolang New Environmental Protection Building Materials Co., Ltd., with a particle size of 0.08 - 1.55 mm; Fly ash, supplied by Hebei Huishun Mining Co., Ltd., with a density of 1.0 - 2.9 g / cm 3 , a porosity of 50% - 80%, 400 mesh; Potassium feldspar powder, supplied by Shijiazhuang Mayue Building Materials Co., Ltd., with a density of 2.5 - 2.6 g / cm 3 , 200 mesh; Talc powder, supplied by Tianjin Yandong Haotian Mineral Products Co., Ltd., 300 mesh; Matrix asphalt, supplied by Hebei Fengtaiyuan Energy Technology Co., Ltd., modified asphalt particles, softening point 109°C, ash content 0.18; Epoxy resin, supplied by Wanqing Chemical Technology Co., Ltd., NPEL - 128 epoxy resin; Curing agent, hexamethylenediamine produced by Jinan Yuanlian Chemical Co., Ltd., purity 98.52 wt%; or, m - xylylenediamine, a curing agent for epoxy resin produced by Mitsubishi of Japan; First asphalt additive, propylene glycol methyl ether, supplied by Shanghai Kangtuo Chemical Co., Ltd., effective ingredient content 99 wt%; dipropylene glycol methyl ether, supplied by Shanghai Basibai Technology Co., Ltd., purity 98.52 wt%; dipropylene glycol butyl ether, supplied by Shandong Shenyuan Chemical Co., Ltd., purity 98.52 wt%; Second asphalt additive, propylene glycol diacetate, supplied by Jinan Baohui Chemical Co., Ltd., purity 98.52 wt%; hexamethylene diisocyanate, supplied by Shanghai Shengyue International Trading Co., Ltd., density 1.16 g / ml, viscosity 2500 ± 750 mPa•s; Epoxy resin additives: methyl methacrylate, supplied by Shandong Kejian Chemical Co., Ltd., 99.5 wt%; isooctyl acrylate, supplied by Shandong Kejian Chemical Co., Ltd., 99.9 wt%; 1H,1H,2H,2H - perfluorooctyl methacrylate, supplied by Wuhan Shu'er Biotechnology Co., Ltd., 99.9 wt%; Polyether polyol, supplied by Shandong Bluestar Chemical Co., Ltd., polyether polyol LX - 3010, molecular weight about 3000; Povidone, supplied by Sinopharm Chemical Reagent Co., Ltd., PVP - K30, molecular weight about 40000; Isophorone diisocyanate, supplied by Wanhua Chemical Group Co., Ltd.; Polyurethane resin, supplied by Wanhua Chemical Group Co., Ltd., Wanlin 1000.

[0026] Example 1 This example provides a highly durable asphalt concrete basin anti - seepage material, which includes: 152.0 parts by weight of coarse aggregate; 426.0 parts by weight of fine aggregate; the mineral powder is 84.0 parts by weight of fly ash; 52.0 parts by weight of matrix asphalt; 8.0 parts by weight of epoxy resin; 6.2 parts by weight of curing agent hexamethylenediamine; the asphalt additive is asphalt first additive, 1.5 parts by weight of propylene glycol methyl ether; the epoxy resin additive is methyl methacrylate, 1.5 parts by weight; 5 parts of modified polyurethane resin; The modified polyurethane is prepared according to the following method: (a)Add 50.0 g of polyether polyol, 5.0 g of polyvinylpyrrolidone and 3.0 g of dihydroxydiphenyl sulfone into a 500 mL four-necked flask. The four-necked flask is equipped with a stirrer, a thermometer, a condensation reflux device and a nitrogen inlet tube. Heat it to 110 °C under the protection of a nitrogen atmosphere and carry out dehydration reaction for 2 hours at a constant temperature. After the dehydration is completed, turn off the heating to obtain a dehydrated mixture; (b)Cool the temperature of the dehydrated mixture to 75 °C. Under continuous nitrogen protection, slowly drop 27.0 g of isophorone diisocyanate into the dehydrated mixture, and at the same time add 0.2 g of bismuth octoate catalyst. Maintain the stirring speed at about 300 rpm, control the reaction temperature at 75 °C ± 2 °C, and the reaction time is 3 hours to form a prepolymer with isocyanate end groups; (c)Continue to maintain the temperature at 75 °C, add the remaining 5.0 g of polyvinylpyrrolidone to the above prepolymer, and maintain stirring reaction for 2 hours; (d)After the stirring in step (c) is completed, add 4.0 g of trimethylolpropane to the reaction system and continue to react at 75 °C for 30 minutes to block the residual -NCO groups. The system gradually thickens during the reaction to form a light brown viscous liquid. After the reaction is completed, naturally cool the system to room temperature, carry out vacuum degassing for 15 minutes, and filter impurities with a 200-mesh filter cloth to obtain the target modified polyurethane resin.

[0027] Example 2 This example provides a high-durability asphalt concrete basin anti-seepage material, which includes: 186.0 parts by weight of coarse aggregate; 358.0 parts by weight of fine aggregate; the mineral powder is 125.0 parts by weight of potassium feldspar powder; 40.0 parts by weight of matrix asphalt; 10.0 parts by weight of epoxy resin; 5.5 parts by weight of curing agent hexamethylenediamine; the asphalt additive is asphalt first additive, 2.2 parts by weight of dipropylene glycol methyl ether; the epoxy resin additive is isooctyl acrylate, 3.5 parts by weight; 5 parts of modified polyurethane resin; The preparation method of the modified polyurethane resin is the same as that in Example 1.

[0028] Example 3 This example provides a high-durability asphalt concrete basin anti-seepage material, which includes: 175.0 parts by weight of coarse aggregate; 400.0 parts by weight of fine aggregate; 100.0 parts by weight of mineral powder which is talc powder; 48.0 parts by weight of matrix asphalt; 9.0 parts by weight of epoxy resin; 5.8 parts by weight of curing agent m - xylylenediamine; the asphalt additive is asphalt first additive, 2.0 parts by weight of dipropylene glycol monobutyl ether; the epoxy resin additive is 3.0 parts by weight of 1H,1H,2H,2H - perfluorooctyl methacrylate; 5 parts of modified polyurethane resin; The preparation method of the modified polyurethane resin is the same as that in Example 1.

[0029] Example 4 This example provides a high - durability asphalt concrete basin anti - seepage material, which includes: 175.0 parts by weight of coarse aggregate; 400.0 parts by weight of fine aggregate; 100.0 parts by weight of mineral powder which is talc powder; 48.0 parts by weight of matrix asphalt; 9.0 parts by weight of epoxy resin; 5.8 parts by weight of curing agent m - xylylenediamine; the asphalt additive is asphalt first additive, 2.0 parts by weight of dipropylene glycol monobutyl ether; the epoxy resin additive is 1.5 parts by weight of 1H,1H,2H,2H - perfluorooctyl methacrylate; 5 parts of modified polyurethane resin; The preparation method of the modified polyurethane resin is the same as that in Example 1.

[0030] Example 5 This example provides a high - durability asphalt concrete basin anti - seepage material, which includes: 152.0 parts by weight of coarse aggregate; 426.0 parts by weight of fine aggregate; 84.0 parts by weight of mineral powder which is fly ash; 52.0 parts by weight of matrix asphalt; 8.0 parts by weight of epoxy resin; 6.2 parts by weight of curing agent m - xylylenediamine; the asphalt additive is asphalt second additive, 3.0 parts by weight of propylene glycol diacetate; the epoxy resin additive is 1.5 parts by weight of methyl methacrylate; 5 parts of modified polyurethane resin; The preparation method of the modified polyurethane resin is the same as that in Example 1.

[0031] Example 6 This example provides a high - durability asphalt concrete basin anti - seepage material, which includes: 186.0 parts by weight of coarse aggregate; 358.0 parts by weight of fine aggregate; 125.0 parts by weight of mineral powder which is potassium feldspar powder; 40.0 parts by weight of matrix asphalt; 10.0 parts by weight of epoxy resin; 5.5 parts by weight of curing agent m - xylylenediamine; the asphalt additive is asphalt second additive, 6.0 parts by weight of hexamethylene diisocyanate; the epoxy resin additive is 3.5 parts by weight of isooctyl acrylate; 5 parts of modified polyurethane resin; The preparation method of the modified polyurethane resin is the same as that in Example 1.

[0032] Example 7 This embodiment provides a high-durability asphalt concrete basin anti-seepage material, which includes: 175.0 parts by weight of coarse aggregate; 400.0 parts by weight of fine aggregate; 100.0 parts by weight of mineral powder which is talc powder; 48.0 parts by weight of matrix asphalt; 9.0 parts by weight of epoxy resin; 5.8 parts by weight of curing agent m-xylenediamine; 4.0 parts by weight of asphalt second additive which is hexamethylene diisocyanate as the asphalt additive; 3.0 parts by weight of epoxy resin additive which is tridecafluorooctyl methacrylate; 5 parts of modified polyurethane resin; The preparation method of the modified polyurethane resin is the same as that in Example 1.

[0033] Example 8 This embodiment provides a high-durability asphalt concrete basin anti-seepage material, which includes: 175.0 parts by weight of coarse aggregate; 400.0 parts by weight of fine aggregate; 100.0 parts by weight of mineral powder which is talc powder; 48.0 parts by weight of matrix asphalt; 9.0 parts by weight of epoxy resin; 5.8 parts by weight of curing agent m-xylenediamine; 3.5 parts by weight of epoxy resin additive which is tridecafluorooctyl methacrylate; 5 parts of modified polyurethane resin; The preparation method of the modified polyurethane resin is the same as that in Example 1.

[0034] Example 9 This embodiment provides a high-durability asphalt concrete basin anti-seepage material, which includes: 175.0 parts by weight of coarse aggregate; 400.0 parts by weight of fine aggregate; 100.0 parts by weight of mineral powder which is talc powder; 48.0 parts by weight of matrix asphalt; 9.0 parts by weight of epoxy resin; 5.8 parts by weight of curing agent m-xylenediamine; 2.0 parts by weight of asphalt first additive which is a mixture of propylene glycol methyl ether and dipropylene glycol methyl ether in a weight ratio of 1:2 as the asphalt additive; 3.0 parts by weight of epoxy resin additive which is tridecafluorooctyl methacrylate; 5 parts of modified polyurethane resin; The preparation method of the modified polyurethane resin is the same as that in Example 1.

[0035] Example 10 This embodiment provides a high-durability asphalt concrete basin anti-seepage material, which includes: 175.0 parts by weight of coarse aggregate; 400.0 parts by weight of fine aggregate; 100.0 parts by weight of mineral powder which is talc powder; 48.0 parts by weight of matrix asphalt; 9.0 parts by weight of epoxy resin; 5.8 parts by weight of curing agent m-xylenediamine; 2.0 parts by weight of asphalt first additive which is a mixture of propylene glycol methyl ether and dipropylene glycol methyl ether in a weight ratio of 1:5 as the asphalt additive; 3.0 parts by weight of epoxy resin additive which is tridecafluorooctyl methacrylate; 5 parts of modified polyurethane resin; The preparation method of the modified polyurethane resin is the same as that of Example 1.

[0036] Example 11 This example provides a high-durability asphalt concrete basin anti-seepage material, which includes: 175.0 parts by weight of coarse aggregate; 400.0 parts by weight of fine aggregate; 100.0 parts by weight of mineral powder which is talc powder; 48.0 parts by weight of matrix asphalt; 9.0 parts by weight of epoxy resin; 5.8 parts by weight of curing agent m-xylenediamine; the asphalt additive is the second asphalt additive, 4.6 parts by weight of hexamethylene diisocyanate; the epoxy resin additive is tridecafluorooctyl methacrylate, 3.0 parts by weight; 5 parts of modified polyurethane resin; The preparation method of the modified polyurethane resin is the same as that of Example 1.

[0037] Example 12 This example provides a high-durability asphalt concrete basin anti-seepage material, which includes: 175.0 parts by weight of coarse aggregate; 400.0 parts by weight of fine aggregate; 100.0 parts by weight of mineral powder which is talc powder; 48.0 parts by weight of matrix asphalt; 9.0 parts by weight of epoxy resin; 5.8 parts by weight of curing agent m-xylenediamine; the asphalt additive is the second asphalt additive, 7.0 parts by weight of hexamethylene diisocyanate; the epoxy resin additive is tridecafluorooctyl methacrylate, 3.0 parts by weight; 5 parts of modified polyurethane resin; The preparation method of the modified polyurethane resin is the same as that of Example 1.

[0038] Example 13 This example provides a high-durability asphalt concrete basin anti-seepage material, which includes: 175.0 parts by weight of coarse aggregate; 400.0 parts by weight of fine aggregate; 100.0 parts by weight of mineral powder which is talc powder; 48.0 parts by weight of matrix asphalt; 9.0 parts by weight of epoxy resin; 5.8 parts by weight of curing agent m-xylenediamine; the asphalt additive is the second asphalt additive, 2.0 parts by weight of hexamethylene diisocyanate; the epoxy resin additive is tridecafluorooctyl methacrylate, 3.0 parts by weight; 5 parts of modified polyurethane resin; The preparation method of the modified polyurethane resin is the same as that of Example 1.

[0039] Comparative Example 1 This comparative example provides a high-durability asphalt concrete basin anti-seepage material, which includes: 175.0 parts by weight of coarse aggregate; 400.0 parts by weight of fine aggregate; 100.0 parts by weight of mineral powder as talc powder; 48.0 parts by weight of matrix asphalt; 9.0 parts by weight of epoxy resin; 5.8 parts by weight of curing agent m - xylylenediamine; 4.0 parts by weight of asphalt additive as propylene glycol methyl ether acrylate; 3.0 parts by weight of epoxy resin additive as tridecafluoro - octyl methacrylate; 5 parts of modified polyurethane resin; The preparation method of the modified polyurethane resin is the same as that in Example 1.

[0040] Comparative Example 2 This comparative example provides a high - durability asphalt concrete basin anti - seepage material, which comprises: 175.0 parts by weight of coarse aggregate; 400.0 parts by weight of fine aggregate; 100.0 parts by weight of mineral powder as talc powder; 48.0 parts by weight of matrix asphalt; 9.0 parts by weight of epoxy resin; 5.8 parts by weight of curing agent m - xylylenediamine; 4.0 parts by weight of asphalt additive as isophorone diisocyanate; 3.0 parts by weight of epoxy resin additive as tridecafluoro - octyl methacrylate; 5 parts of modified polyurethane resin; The preparation method of the modified polyurethane resin is the same as that in Example 1.

[0041] Comparative Example 3 This comparative example provides a high - durability asphalt concrete basin anti - seepage material, which comprises: 175.0 parts by weight of coarse aggregate; 400.0 parts by weight of fine aggregate; 100.0 parts by weight of mineral powder as talc powder; 48.0 parts by weight of matrix asphalt; 9.0 parts by weight of epoxy resin; 5.8 parts by weight of curing agent m - xylylenediamine; 2.0 parts by weight of asphalt additive as a mixture of propylene glycol methyl ether and propylene glycol butyl ether in a weight ratio of 1:2; 3.0 parts by weight of epoxy resin additive as tridecafluoro - octyl methacrylate; 5 parts of modified polyurethane resin; The preparation method of the modified polyurethane resin is the same as that in Example 1.

[0042] Comparative Example 4 This comparative example provides a high - durability asphalt concrete basin anti - seepage material, which comprises: 175.0 parts by weight of coarse aggregate; 400.0 parts by weight of fine aggregate; 100.0 parts by weight of mineral powder as talc powder; 48.0 parts by weight of matrix asphalt; 9.0 parts by weight of epoxy resin; 5.8 parts by weight of curing agent m - xylylenediamine; 2.0 parts by weight of asphalt additive as a mixture of propylene glycol methyl ether propionate and ethylene glycol butyl ether in a weight ratio of 1:2; 3.0 parts by weight of epoxy resin additive as tridecafluoro - octyl methacrylate; 5 parts of modified polyurethane resin; The preparation method of the modified polyurethane resin is the same as that in Example 1.

[0043] Comparative Example 5 This comparative example provides a highly durable asphalt concrete basin anti-seepage material, which includes: 175.0 parts by weight of coarse aggregate; 400.0 parts by weight of fine aggregate; the mineral powder is talc powder, 100.0 parts by weight; 48.0 parts by weight of matrix asphalt; 9.0 parts by weight of epoxy resin; 5.8 parts by weight of curing agent m-xylenediamine; the asphalt additive is the first asphalt additive, and the first asphalt additive is a mixture of propylene glycol methyl ether and dipropylene glycol methyl ether in a weight ratio of 1:5, 2.0 parts by weight; the epoxy resin additive is 3.0 parts by weight of dodecafluoroheptyl methacrylate; 5 parts of modified polyurethane resin; The preparation method of the modified polyurethane resin is the same as that in Example 1.

[0044] Comparative Example 6 This comparative example provides a highly durable asphalt concrete basin anti-seepage material, which includes: 175.0 parts by weight of coarse aggregate; 400.0 parts by weight of fine aggregate; the mineral powder is talc powder, 100.0 parts by weight; 48.0 parts by weight of matrix asphalt; 9.0 parts by weight of epoxy resin; 5.8 parts by weight of curing agent m-xylenediamine; the asphalt additive is the first asphalt additive, and the first asphalt additive is a mixture of propylene glycol methyl ether and dipropylene glycol methyl ether in a weight ratio of 1:5, 2.0 parts by weight; the epoxy resin additive is 3.0 parts by weight of hexafluorobutyl methacrylate; 5 parts of modified polyurethane resin; The preparation method of the modified polyurethane resin is the same as that in Example 1.

[0045] Comparative Example 7 This comparative example provides a highly durable asphalt concrete basin anti-seepage material, which includes: 175.0 parts by weight of coarse aggregate; 400.0 parts by weight of fine aggregate; the mineral powder is talc powder, 100.0 parts by weight; 48.0 parts by weight of matrix asphalt; 9.0 parts by weight of epoxy resin; 5.8 parts by weight of curing agent m-xylenediamine; the asphalt additive is the second asphalt additive, 4.6 parts by weight of hexamethylene diisocyanate; the epoxy resin additive is 3.0 parts by weight of 2-hydroxyethyl acrylate; 5 parts of modified polyurethane resin; The preparation method of the modified polyurethane resin is the same as that in Example 1.

[0046] Comparative Example 8 This comparative example provides a highly durable asphalt concrete basin anti-seepage material, which includes: 175.0 parts by weight of coarse aggregate; 400.0 parts by weight of fine aggregate; the mineral powder is talc powder, 100.0 parts by weight; 48.0 parts by weight of matrix asphalt; 9.0 parts by weight of epoxy resin; 5.8 parts by weight of curing agent m-xylenediamine; the asphalt additive is the second asphalt additive, 4.6 parts by weight of hexamethylene diisocyanate; the epoxy resin additive is 3.0 parts by weight of hexafluorobutyl acrylate; 5 parts of modified polyurethane resin; The preparation method of the modified polyurethane resin is the same as that of Example 1.

[0047] Comparative Example 9 (without modified polyurethane resin) This comparative example provides a highly durable asphalt concrete basin anti-seepage material, which includes: 175.0 parts by weight of coarse aggregate; 400.0 parts by weight of fine aggregate; 100.0 parts by weight of mineral powder which is talcum powder; 48.0 parts by weight of matrix asphalt; 9.0 parts by weight of epoxy resin; 5.8 parts by weight of curing agent m-xylenediamine; the asphalt auxiliary agent is the second asphalt auxiliary agent, 4.0 parts by weight of hexamethylene diisocyanate; the epoxy resin auxiliary agent is tridecafluorooctyl methacrylate, 3.0 parts by weight.

[0048] Comparative Example 10 This comparative example provides a highly durable asphalt concrete basin anti-seepage material, which includes: 175.0 parts by weight of coarse aggregate; 400.0 parts by weight of fine aggregate; 100.0 parts by weight of mineral powder which is talcum powder; 48.0 parts by weight of matrix asphalt; 9.0 parts by weight of epoxy resin; 5.8 parts by weight of curing agent m-xylenediamine; the asphalt auxiliary agent is the second asphalt auxiliary agent, 4.6 parts by weight of hexamethylene diisocyanate; the epoxy resin auxiliary agent is tridecafluorooctyl methacrylate, 3.0 parts by weight; 5 parts of unmodified polyurethane resin.

[0049] Comparative Example 11 This comparative example provides a highly durable asphalt concrete basin anti-seepage material, which includes: 175.0 parts by weight of coarse aggregate; 400.0 parts by weight of fine aggregate; 100.0 parts by weight of mineral powder which is talcum powder; 48.0 parts by weight of matrix asphalt; 9.0 parts by weight of epoxy resin; 5.8 parts by weight of curing agent m-xylenediamine; the asphalt auxiliary agent is the first asphalt auxiliary agent, and the first asphalt auxiliary agent is a mixture of propylene glycol methyl ether and dipropylene glycol methyl ether in a weight ratio of 1:2, 2.0 parts by weight; the epoxy resin auxiliary agent is tridecafluorooctyl methacrylate, 3.0 parts by weight; 15 parts of modified polyurethane resin; The preparation method of the modified polyurethane resin is the same as that of Example 1.

[0050] Effect and performance detection The experimental process of the following performance experiments was carried out according to the regulations in the Test Procedures for Asphalt and Asphalt Mixtures of Highway Engineering JTG E20-2011. The specific test conditions and parameters are as follows: For the Marshall stability test, standard Marshall specimens (diameter 101.6 mm, height 63.5 mm) were fabricated as per the regulations and their Marshall stability and flow value indices were tested. For the linear shrinkage coefficient test, the temperature range adopted was +10 to -30 °C and the cooling rate was 5 °C / h. For the water permeability test, asphalt mixture specimens were fabricated according to the asphalt mixture specimen forming method (wheel rolling method) in this specification T 0703. After cooling for the specified time, the specimens were demolded and the paper padded on the surface during specimen forming was removed. The water permeability coefficient of the asphalt mixture specimens was calculated according to Equation (T 0730-1), and the water volume passing through in 3 min was used for the calculation.

[0051] The various performance test results obtained are shown in Table 1.

[0052] Table 1

[0053] From the comparison of the performance data of the above examples, it can be known that the high-durability asphalt concrete basin anti-seepage material of the present invention has good performance (stability (1d), flow value, linear shrinkage coefficient and water permeability coefficient).

[0054] In Example 8, no asphalt additive was added. The stability was 8.48 KN, the flow value was 2.99 mm, the linear shrinkage coefficient was 3.97×10 -5 °C, and the water permeability coefficient was 6.3 ml / min. Compared with Example 7 with asphalt additive added, the stability was lower, and the linear shrinkage coefficient and water permeability coefficient were higher, indicating that the asphalt additive has a positive effect on improving the stability and anti-deformation ability of the material, and reducing shrinkage and water permeability.

[0055] In Comparative Examples 1-4, the types of asphalt additives were replaced respectively. Compared with the asphalt additive to be protected by the present invention, these asphalt additives had poor compatibility in the actual asphalt system and failed to effectively improve the toughness, anti-cracking performance and bonding performance with epoxy resin of the asphalt system, resulting in lower stability, higher linear shrinkage coefficient and weaker anti-deformation ability. In Comparative Examples 5-8, the types of epoxy resin additives were replaced respectively. The compatibility and synergy of these epoxy additives with the whole system decreased, and the effective crosslinking density and network structure between asphalt and epoxy resin were insufficient, resulting in a significant reduction in the mechanical properties, anti-cracking property and anti-deformation ability of the formed material, manifested as a decrease in stability, an increase in linear shrinkage coefficient and deterioration of water permeability performance. The above results show that the selected asphalt additive and epoxy resin additive of the present invention play a key role in the comprehensive performance of the anti-seepage material, and the same effect cannot be achieved by conventional replacement.

[0056] In Comparative Example 9, polyurethane resin was not added, lacking flexible adjustment and interfacial strengthening components, resulting in a relatively loose material structure, weaker bite force and bonding force between aggregates, manifested as reduced stability, increased water permeability coefficient, and relatively large linear shrinkage coefficient, indicating insufficient thermal stability and compactness of the system. In Comparative Example 10, unmodified polyurethane resin was added, which could not form effective interfacial action with asphalt and aggregates and did not have obvious polar association ability, so it was still at a low level in various properties. This shows that unmodified polyurethane resin cannot exert its due strengthening effect, and the design of the modified structure is the key to achieving performance improvement.

[0057] In Comparative Example 11, the addition amount of the modified polyurethane resin was 15 parts, exceeding the optimal usage range, resulting in the "over-softening" phenomenon of the material properties, especially manifested as a decrease in stability and an increase in the linear shrinkage coefficient. It can be seen that the modified polyurethane resin helps to optimize the material properties when used in an appropriate amount, but when the dosage is too much, it will instead break the mechanical balance of the material and reduce the stability and durability.

[0058] The application method of the high-durability asphalt concrete basin anti-seepage material of the present invention includes the following steps: (1) Heat the matrix asphalt to 150 - 160 °C, stir to completely melt the matrix asphalt, add epoxy resin, asphalt additive, epoxy resin additive and modified polyurethane resin according to the ratio into the melted matrix asphalt, and continue to stir to obtain an asphalt-resin mixture; (2) Pre-mix the coarse aggregate and fine aggregate to obtain a mixed aggregate, then add mineral powder to the mixed aggregate, stir to obtain a mixture of aggregate and mineral powder and add it to the asphalt-resin mixture, and continue to stir to obtain a mixture; (3) Add a curing agent to the mixture obtained in step (2), heat to 170 - 175 °C, and stir at this temperature for 20 - 30 minutes, and then carry out the construction of the basin.

[0059] Furthermore, the basin is constructed in upper and lower layers. When constructing the lower layer of the basin, the asphalt additive in the high-durability asphalt concrete basin anti-seepage material is the second asphalt additive at this time; after the construction of the lower layer of the basin is completed, continue to construct the upper layer of the basin, and the asphalt additive in the high-durability asphalt concrete basin anti-seepage material is the first asphalt additive at this time.

[0060] In practical applications, layered construction can make full use of the advantages of different additives. The lower layer is in direct contact with the bottom of the reservoir basin and requires better anti-seepage performance. Using the second asphalt additive (such as hexamethylene diisocyanate) can significantly improve the anti-seepage performance of the material and reduce the risk of leakage. The upper layer requires better stability and anti-deformation ability to withstand the upper load and environmental impact. Using the first asphalt additive (such as a mixture of propylene glycol methyl ether and dipropylene glycol methyl ether) can improve the stability and flow value of the material, ensuring the structural stability and construction quality of the upper layer. This method of layered construction can ensure the overall anti-seepage effect and structural stability of the reservoir basin, thereby improving the service life and safety of the project.

[0061] The above is the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A high-durability asphalt concrete reservoir basin anti-seepage material, comprising: 152.0 to 186.0 parts by weight of coarse aggregate; 358.0 to 426.0 parts by weight of fine aggregate; 84.0 to 125.0 parts by weight of mineral powder; 40.0 to 52.0 parts by weight of matrix asphalt; 8.0 to 10.0 parts by weight of epoxy resin; 5.5 to 6.2 parts by weight of curing agent; 1.5 to 6.0 parts by weight of asphalt additive; 1.5 to 3.5 parts by weight of epoxy resin additive; 3.0 to 8.0 parts of modified polyurethane resin; The epoxy resin additive is selected from at least one of methyl methacrylate, isooctyl acrylate and tridecafluorooctyl methacrylate; The asphalt additive is 1.5 to 2.2 parts by weight of asphalt first additive or 3.0 to 6.0 parts by weight of asphalt second additive. The asphalt first additive is a mixture of propylene glycol methyl ether and dipropylene glycol methyl ether in a weight ratio of 1:2 to 5; The asphalt second additive is 4.0 to 4.6 parts by weight of hexamethylene diisocyanate; The raw materials for preparing the modified polyurethane resin include, by weight: 40 - 60 parts of polyether polyol, 20 - 35 parts of isophorone diisocyanate, 5 - 15 parts of polyvinylpyrrolidone, 1 - 5 parts of dihydroxydiphenyl sulfone, 1 - 10 parts of trimethylolpropane, and 0.05 - 0.5 parts of organic bismuth catalyst.

2. The high-durability asphalt concrete impervious material for the reservoir basin according to claim 1, wherein: The modified polyurethane resin is prepared according to the following method: (a) Mix polyether polyol, 1 - 5 parts of polyvinylpyrrolidone and dihydroxydiphenyl sulfone, and heat for dehydration to obtain a dehydrated mixture; (b) Cool the dehydrated mixture obtained in step (a), add isophorone diisocyanate under nitrogen protection, and at the same time add organic bismuth catalyst, and stir and react to obtain a prepolymer with isocyanate end groups; (c) Add the remaining polyvinylpyrrolidone to the prepolymer obtained in step (b), and continue to react; (d) After the reaction in step (c) is completed, add trimethylolpropane, and continue to react for 20 - 60 minutes to block the residual isocyanate groups and terminate the reaction to obtain the modified polyurethane resin.

3. The high-durability asphalt concrete impervious material for the reservoir basin according to claim 2, characterized in that: The temperature for heating and dehydration in step (a) is 90 - 120 °C, and the time is 1 - 3 hours.

4. The high-durability asphalt concrete impervious material for the reservoir basin according to claim 2, wherein: The temperature for cooling in step (b) is 60 - 90 °C, the time for stirring and reacting is 2 - 5 hours, and the organic bismuth catalyst is one of bismuth octoate, bismuth neodecanoate or bismuth trihydroxybenzoate.

5. The high-durability asphalt concrete impervious material for the reservoir basin according to claim 2, characterized in that: The temperature for the reaction in step (c) is 60 - 90 °C, and the time is 1 - 3 hours.

6. The high-durability asphalt concrete impervious material for the reservoir basin according to claim 1, wherein: The particle size of the coarse aggregate is 1.56 - 20 mm; the particle size of the fine aggregate is 0.08 - 1.55 mm.

7. The high-durability asphalt concrete impervious material for the reservoir basin according to claim 1, characterized in that: The mineral powder is one or more of fly ash, potassium feldspar powder and talc powder.

8. The high-durability asphalt concrete impervious material for the reservoir basin according to claim 1, characterized in that: The curing agent is one or both of hexamethylenediamine and m - xylylenediamine.

9. The application method of the high - durability asphalt concrete basin anti - seepage material according to any one of claims 1 - 8, comprising the following steps: (1) Heat the matrix asphalt to 150 - 160 °C, stir to completely melt the matrix asphalt, add epoxy resin, asphalt additive, epoxy resin additive and modified polyurethane resin according to the ratio into the melted matrix asphalt, and continue to stir to obtain an asphalt - resin mixture; (2) Pre-mix the coarse aggregate and the fine aggregate to obtain a mixed aggregate, then add mineral powder to the mixed aggregate, stir to obtain a mixture of the aggregate and the mineral powder, and add it to the asphalt-resin mixture, and continue stirring to obtain a mixture. (3) Add a curing agent to the mixture obtained in step (2), heat it to 170 - 175 °C, and stir at this temperature for 20 - 30 minutes, and then carry out the construction of the reservoir basin.

10. The application method of the high-durability asphalt concrete basin anti-seepage material according to claim 9, characterized in that: The reservoir basin is constructed in upper and lower layers. When constructing the lower layer of the reservoir basin, the asphalt additive in the high-durability asphalt concrete reservoir basin impermeable material is the second asphalt additive at this time; after the construction of the lower layer of the reservoir basin is completed, continue to construct the upper layer of the reservoir basin, and the asphalt additive in the high-durability asphalt concrete reservoir basin impermeable material is the first asphalt additive at this time.

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