Method for preparing waterproof coiled material from composite coal liquefaction residue asphalt

Abstract

The invention discloses a method for preparing a waterproof coiled material by using composite coal liquefaction residue asphalt. The method comprises the following steps: mixing matrix petroleum asphalt in a molten state with molten DCLR in a certain proportion to obtain DCLR modified asphalt; adding a certain amount of SBS into the DCLR modified asphalt, shearing for a period of time at a certain temperature, sequentially adding a certain amount of engine oil and rubber powder, continuously shearing for a period of time at a certain temperature, and finally developing for a period of time at a certain temperature to obtain the composite DCLR modified asphalt. Coating the composite DCLR modified asphalt on the upper and lower surfaces of a base to obtain a base body of the waterproof coiled material; the upper surface and the lower surface of the waterproof coiled material base body are coated with isolating membranes or covered with gravel and then cooled and formed. The problems that the added values of the coal liquefaction residues, the waste rubber powder and the waste engine oil are low, the compatibility of the coal liquefaction residues and the petroleum asphalt is poor, and the low-temperature performance and the anti-aging performance of the mixed asphalt are poor are solved.

Description

Technical Field

[0001] The invention relates to the technical field of building waterproof materials, in particular to a method for preparing a waterproof coiled material by utilizing composite coal liquefaction residue asphalt. Background Art

[0002] my country is a major oil consumer. As of 2020, my country's oil imports have exceeded 500 million tons, and its external dependence has exceeded 70%. However, my country's coal resources are relatively abundant. Vigorously developing the coal liquefaction industry to partially replace petroleum fuels is one of the important ways to solve the problem of energy security supply. Direct coal liquefaction is a process technology that produces liquid fuels and chemicals by hydrogenation of coal under certain temperature, pressure and catalyst. DCLR is a heavy product produced by the coal liquefaction process, accounting for about 30% of the input coal. It is easy to mix evenly with carboxylic bonding materials. It can be used as a binder or replace coal with strong bonding properties to participate in coal blending and coking. It can also be used for gasification and fuel, but its dosage is small and causes certain pollution to the environment. In terms of chemical composition, DCLR has similar chemical properties to petroleum asphalt, which allows us to use DCLR as a modifier to replace a certain amount of base petroleum asphalt to prepare modified asphalt for making waterproof membranes.

[0003] Therefore, DCLR modified asphalt has also developed to a certain extent in recent years. A composite modified asphalt of coal direct liquefaction residue and its preparation method (CN101875789B) adds colloid and oil to the molten coal direct liquefaction residue, and stirs it evenly to obtain modified asphalt. Although this can greatly increase the added value of the coal liquefaction residue, the low temperature performance and anti-aging performance of the modified asphalt obtained are poor, and the construction difficulty is also very large. A road asphalt modifier and its application method (CN10439449C) grinds the coal liquefaction residue into powder, and then mixes it with the matrix petroleum asphalt at 100-250°C to prepare modified asphalt. The mixed asphalt prepared by this method has poor compatibility, and when the amount of coal liquefaction residue added is too large, its low temperature performance will be greatly reduced and it is difficult to meet the road performance. Waterproof roll and method for preparing waterproof roll using coal liquefaction residue (CN104403331A) Coal liquefaction asphalt is extracted from coal liquefaction residue, and then mixed with petroleum asphalt, SBS, and softener to prepare modified asphalt to make waterproof roll. Although the anti-dust, flexibility and heat resistance of the waterproof roll prepared by the method will be greatly improved, the preparation process is complicated, which greatly increases the manufacturing cost, and the low-temperature performance of the waterproof roll prepared by the method is poor. Summary of the invention

[0004] The present application provides a composite coal liquefaction residue modified asphalt and a method for preparing a waterproof membrane thereof, aiming to solve the problems of low added value of coal liquefaction residue, waste rubber powder and waste engine oil, as well as poor compatibility of coal liquefaction residue with petroleum asphalt, and low-temperature performance and anti-aging performance of mixed asphalt.

[0005] The present application provides a method for preparing a waterproof roll material using composite coal liquefaction residue asphalt, comprising the following steps: S1, heating a base petroleum asphalt at a certain temperature for a period of time to a molten state; S2, grinding DCLR into powder, and heating it at a certain temperature for a period of time to a molten state; S3, adding the molten DCLR in step S2 to the molten petroleum asphalt in a certain proportion, shearing it at a certain temperature for a period of time, and obtaining a DCLR modified asphalt; S4, adding a certain amount of SBS to the DCLR modified asphalt and shearing it at a certain temperature for a period of time, then adding a certain amount of engine oil and rubber powder in sequence, and continuing to shear at a certain temperature for a period of time, and finally developing it at a certain temperature for a period of time to obtain a composite DCLR modified asphalt; S5, coating the composite DCLR modified asphalt on the upper and lower surfaces of the tire base to obtain a base of the waterproof roll material; S6, coating the upper and lower surfaces of the waterproof roll base with an isolation film or covering it with sand and gravel, and then cooling and forming it, to obtain a waterproof roll material prepared using composite coal liquefaction residue asphalt.

[0006] By adopting the above technical solution, the compatibility of coal direct liquefaction residue and petroleum asphalt can be improved by mixing the two, and the improvement of the compatibility of the two can improve the low-temperature performance and anti-aging performance of the mixed asphalt. Secondly, the addition of engine oil and rubber powder can reduce the viscosity of asphalt, improve its low-temperature fluidity, improve the flexibility and elasticity of asphalt, reduce low-temperature cracks, and thus improve its low-temperature performance. Engine oil forms a protective film on the surface of asphalt, slowing down oxidation and ultraviolet aging, while the rubber component in the rubber powder improves the chemical stability of asphalt and enhances its anti-aging ability.

[0007] Preferably, in step S1, the base petroleum asphalt is one of No. 70 petroleum asphalt and No. 90 petroleum asphalt.

[0008] Preferably, in step S1, the heating temperature is 140-150°C, the heating time is 1-1.5h, and the softening point of No. 70 or No. 90 petroleum asphalt is 45-50°C.

[0009] Preferably, in step S2, the particle size of the DCLR powder is 40-60 mesh.

[0010] Preferably, in step S2, the heating temperature is 190-200°C, the heating time is 15-20 min, and the softening point of DCLR is 150-170°C.

[0011] Preferably, in step S3, the addition amount of the DCLR is 8-12%, the shearing temperature may be 140-160° C., and the shearing time may be 60-80 min.

[0012] Preferably, in step S4, the added amount of SBS is 2-3%, the added amount of waste engine oil is 4-7%, and the added amount of waste rubber powder is 10-15%.

[0013] Preferably, in step S4, the shear time is 60~80min, the shear temperature is 160~180℃, and the development time is 60~80min; the softening point of the composite DCLR modified asphalt is 80℃~95℃; when the ductility of the composite DCLR modified asphalt is at 25℃, it is greater than 50mm, and when the needle penetration of the composite DCLR modified asphalt is at 25℃, it is greater than 30mm.

[0014] By adopting the above technical solution, controlling the reaction temperature can improve the ductility and penetration of the composite DCLR modified asphalt, and the obtained composite modified asphalt has obvious improvements in low temperature performance and anti-aging performance.

[0015] Preferably, in step S5, the tire base is one of a polyester tire, a glass fiber tire and a polyethylene tire.

[0016] Preferably, in step S6, the isolation film is one of a polyethylene film, a polyester film and a silicone oil film, and the sand and gravel is one of a river sand, a quartz sand and a machine-made sand.

[0017] One or more technical solutions provided in this application have at least the following technical effects or advantages: 1. This application adopts a mixing method of coal direct liquefaction residue and petroleum asphalt, which not only significantly increases the added value of coal direct liquefaction residue, but also appropriately increases the added value of waste engine oil and waste rubber powder, opening up a new way for the efficient utilization of waste.

[0018] 2. The present application adopts a mixing method of coal direct liquefaction residue and petroleum asphalt to improve the compatibility of the two. The composite modified asphalt prepared by this method not only has a simple preparation process, but also greatly improves the low temperature performance and anti-aging performance of the mixed asphalt. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a flow chart for the preparation of composite coal liquefaction residue modified asphalt.

[0021] Figure 2 This is a process flow chart for the production of modified asphalt waterproof membrane. DETAILED DESCRIPTION

[0022] The present application provides a composite coal liquefaction residue modified asphalt and a method for preparing a waterproof membrane thereof, aiming to solve the problems of low added value of coal liquefaction residue, waste rubber powder and waste engine oil, as well as poor compatibility of coal liquefaction residue with petroleum asphalt, and low-temperature performance and anti-aging performance of mixed asphalt.

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0024] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product, or server that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or modules that are not clearly listed or inherent to these processes, methods, products, or devices.

[0025] raw material No. 70 petroleum asphalt: from Dalian Petrochemical Company of China National Petroleum Corporation.

[0026] No. 90B petroleum asphalt: from Guangzhou Branch of Sinopec.

[0027] Coal direct liquefaction residue: a by-product of coal direct liquefaction from the Ordos Branch of China Shenhua Coal to Liquids Chemical Co., Ltd.

[0028] SBS (Styrene-Butadiene-Styrene Block Copolymer): A triblock copolymer with styrene and butadiene as monomers.

[0029] Polyester tire: Polyester tire is a composite material with polyester fiber as the main component, which has good strength, heat resistance and corrosion resistance.

[0030] Fiberglass tire: Fiberglass tire refers to the tire body material with glass fiber as the main component, which has high strength, heat resistance, corrosion resistance and electrical insulation.

[0031] Polyethylene tire: Polyethylene tire is a tire body made of polyethylene material, which has good chemical stability, water resistance and corrosion resistance.

[0032] River sand: River sand is natural sand extracted from rivers. Its main component is silicon dioxide. The particles are round and the mud content is relatively low.

[0033] Quartz sand: Quartz sand is a high-purity silica sand with high hardness and wear resistance.

[0034] Artificial sand: Artificial sand is made by mechanical crushing and screening, and its source can be rocks such as limestone and granite.

[0035] Example 1

[0036] Taking the preparation of 100 kg of composite coal liquefaction residue modified asphalt as an example, the raw materials used are as follows: 8 kg of coal direct liquefaction residue, 76 kg of 70# petroleum asphalt, 1.5 kg of SBS, 4 kg of engine oil, 10.5 kg of waste rubber powder, polyester tire and polyethylene film.

[0037] The preparation method is as follows: First, 70# petroleum asphalt was heated at 140°C until it melted, and the coal liquefaction residue was ground into powder and heated at 190°C until it melted, and then the coal liquefaction residue and petroleum asphalt were mixed together and sheared at 150°C for 80 minutes, and then the temperature was raised to 170°C, SBS was added for shearing for 60 minutes, and then engine oil and rubber powder were added for shearing for 60 minutes, and then developed at this temperature for 70 minutes. The prepared composite coal liquefaction residue modified asphalt was coated on both sides of the polyester tire, and it was made to reach a thickness of 3mm by an oiling roller, and it was bonded together with a polyethylene film, and compacted by a compactor to obtain the finished waterproof roll material of Example 1.

[0038] Example 2

[0039] Taking the preparation of 100kg of composite coal liquefaction residue modified asphalt as an example, the raw materials used are as follows: 10kg of coal direct liquefaction residue, 75kg of 90B petroleum asphalt, 1.5kg of SBS, 3.5kg of engine oil, 10kg of waste rubber powder, glass fiber tire and river sand.

[0040] The preparation method is as follows: First, 90B petroleum asphalt was heated at 150°C until it melted, and the coal liquefaction residue was ground into powder and heated at 200°C until it melted, and then the coal liquefaction residue and petroleum asphalt were mixed together and sheared at 155°C for 80 minutes, and then the temperature was raised to 180°C, SBS was added for shearing for 80 minutes, and then engine oil and rubber powder were added for shearing for 80 minutes, and then developed at this temperature for 80 minutes. The prepared composite coal liquefaction residue modified asphalt was coated on both sides of the glass fiber tire, and the thickness was 3mm through an oiling roller, and then the heated river sand was evenly covered on both sides of the glass fiber tire coated with the modified asphalt, and compacted by a compactor to obtain the finished waterproof membrane of Example 2.

[0041] Example 3

[0042] Taking the preparation of 100 kg of composite coal liquefaction residue modified asphalt as an example, the raw materials used are as follows: 11 kg of coal direct liquefaction residue, 72 kg of 90B petroleum asphalt, 1.5 kg of SBS, 4.5 kg of engine oil, 11 kg of waste rubber powder, polyester tire and quartz sand.

[0043] The preparation method is as follows: First, 90B petroleum asphalt was heated at 145°C until it melted, and the coal liquefaction residue was ground into powder and heated at 200°C until it melted, and then the coal liquefaction residue and petroleum asphalt were mixed together and sheared at 160°C for 80 minutes, and then the temperature was raised to 175°C, SBS was added for shearing for 80 minutes, and then engine oil and rubber powder were added for shearing for 80 minutes, and then developed at this temperature for 80 minutes. The prepared composite coal liquefaction residue modified asphalt was coated on both sides of the polyester tire, and the thickness reached 3mm through an oiling roller, and then the heated quartz sand was evenly coated on both sides of the polyester tire coated with the modified asphalt, and compacted by a compactor to obtain the finished waterproof roll material of Example 3.

[0044] Example 4

[0045] Taking the preparation of 100kg of composite coal liquefaction residue modified asphalt as an example, the raw materials used are as follows: 9kg of coal direct liquefaction residue, 75kg of 70# petroleum asphalt, 2kg of SBS, 3.75kg of engine oil, 10.25kg of waste rubber powder, polyethylene tire and machine-made sand.

[0046] The preparation method is as follows: First, 70# petroleum asphalt is heated at 140°C until it melts, and coal liquefaction residue is ground into powder and heated at 190°C until it melts, then the coal liquefaction residue and petroleum asphalt are mixed together and sheared at 150°C for 70 minutes, then the temperature is raised to 170°C, SBS is added for shearing for 70 minutes, and then engine oil and rubber powder are added for shearing for 70 minutes, and then the mixture is grown at this temperature for 70 minutes. The prepared composite coal liquefaction residue modified asphalt is coated on both sides of the polyethylene tire, and the thickness is 3mm through an oiling roller, and then the heated machine-made sand is evenly coated on both sides of the polyester tire coated with the modified asphalt, and compacted by a compactor to obtain the finished waterproofing membrane of Example 4.

[0047] Comparative Example 1: Taking the preparation of 100 kg of coal liquefaction residue modified asphalt as an example, the raw materials used are as follows: 10 kg of coal direct liquefaction residue, 90 kg of 90B petroleum asphalt, polyester tire and polyethylene film. SBS, waste oil and waste rubber powder are not added.

[0048] The preparation method is as follows: First, 90B petroleum asphalt was heated at 145°C until it melted, and the coal liquefaction residue was ground into powder and heated at 190°C until it melted, and then the coal liquefaction residue and petroleum asphalt were mixed together and sheared at 155°C for 70 minutes, and then developed at this temperature for 70 minutes. It was coated on both sides of the polyester tire, and passed through an oiling roller to make it reach a thickness of 3mm, and it was bonded together with a polyethylene film, and compacted by a compactor to obtain the finished waterproof roll material of Comparative Example 1.

[0049] Comparative Example 2: Taking 100kg of SBS modified asphalt as an example, the raw materials used are as follows: SBS 2kg, waste rubber powder 12kg, waste engine oil 6kg, 90B petroleum asphalt 80kg, glass fiber tire and quartz sand. No coal liquefaction residue modified asphalt was added.

[0050] The preparation method is as follows: First, 90B petroleum asphalt was heated at 150°C until it melted, then the temperature was raised to 170°C, SBS was added and sheared for 80 minutes, then engine oil and rubber powder were added and sheared for 80 minutes, and then developed at this temperature for 80 minutes. It was coated on both sides of the glass fiber tire and passed through an oiling roller to a thickness of 3 mm, and then heated quartz sand was evenly coated on both sides of the glass fiber tire coated with modified asphalt, and compacted by a compactor to obtain the finished waterproof membrane of Comparative Example 2.

[0051] Performance testing experiment The softening point, ductility, penetration, penetration ratio after aging and softening point increment of the modified asphalt materials of Examples 1 to 3 and Comparative Examples 1 to 2 were tested, and the test results are shown in Table 1.

[0052] The tensile strength, low temperature flexibility, heat resistance, lower surface thickness, oil permeability and other indicators of the finished waterproof membranes of Examples 1 to 4 and Comparative Examples 1 to 2 were tested in accordance with GB / T18242-2008. The test results are shown in Table 2.

[0053] Table 1 Performance indicators of modified asphalt

[0054] Table 2 Physical properties of modified asphalt waterproof membrane

[0055] It can be seen from the data in Table 2 that the composite DCLR modified asphalt waterproof membrane prepared by the present invention has higher soluble matter content, better heat resistance and better low-temperature flexibility than DCLR modified asphalt and SBS modified asphalt waterproof membrane. This shows that the waterproof membrane prepared by the present invention not only improves the added value of coal direct liquefaction residue, waste rubber powder and waste engine oil, solves the defects of elastomer modified asphalt waterproof membrane in high and low temperature resistance, but also can fully meet the application requirements.

[0056] In addition, by comparing the data in Example 1 with that in Comparative Example 1, compared with the modified asphalt waterproofing membrane without SBS, engine oil and waste rubber powder, the tensile force of the modified asphalt waterproofing membrane in Comparative Example 1 is smaller, the tear strength is lower; and the low-temperature flexibility is worse, and the nail rod tear strength is lower. This is because the addition of engine oil and rubber powder can reduce the viscosity of asphalt, improve its low-temperature fluidity, improve the flexibility and elasticity of asphalt, reduce low-temperature cracks, and at the same time, engine oil forms a protective film on the surface of asphalt, slowing down oxidation and ultraviolet aging, and thus having better nail rod tear strength. In addition, from the data analysis and comparison between Example 1 and Comparative Example 2, compared with the modified asphalt without the addition of coal liquefaction residue. It has a certain low-temperature flexibility compared to Comparative Example 1, but its heat resistance is deteriorated.

[0057] From the above analysis, it can be concluded that the modified asphalt waterproof membrane obtained in Example 2 has better physical properties, wherein the raw material formula includes coal direct liquefaction residue, 90B petroleum asphalt, SBS, engine oil, waste rubber powder, glass fiber tire and river sand.

[0058] It should be noted that the above-mentioned sequence of the embodiments of the present application is only for description and does not represent the advantages and disadvantages of the embodiments. And the above-mentioned specific embodiments of this specification are described. Other embodiments are within the scope of the attached claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0059] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

[0060] This specification and drawings are merely exemplary illustrations of the present application and are deemed to cover any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, a person skilled in the art may make various modifications and variations to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the present application and its equivalents, the present application intends to include these modifications and variations.

Claims

1. A method for preparing a waterproof roll material using composite coal liquefaction residue asphalt, characterized in that: The following steps are involved: S1. Heating the base petroleum asphalt at a certain temperature for a period of time until it is in a molten state; S2, grinding DCLR into powder, and heating at a certain temperature for a period of time until it becomes molten; S3, adding the molten DCLR in step S2 to the molten petroleum asphalt in a certain proportion, and shearing for a period of time at a certain temperature to obtain DCLR modified asphalt; S4, adding a certain amount of SBS to the DCLR modified asphalt and shearing it at a certain temperature for a period of time, then adding a certain amount of engine oil and rubber powder in sequence and continuing to shear it at a certain temperature for a period of time, and finally developing it at a certain temperature for a period of time to obtain a composite DCLR modified asphalt; S5, coating the composite DCLR modified asphalt on the upper and lower surfaces of the tire base to obtain a base of the waterproof membrane; S6. Covering the upper and lower surfaces of the waterproof coiled material substrate with an isolation film or sand and gravel, and then cooling and forming the substrate to obtain a waterproof coiled material prepared using composite coal liquefaction residue asphalt.

2. The method for preparing a waterproofing roll material using composite coal liquefaction residue asphalt according to claim 1, characterized in that: In step S1, the base petroleum asphalt is one of No. 70 petroleum asphalt and No. 90 petroleum asphalt.

3. The method for preparing waterproofing coiled material using composite coal liquefaction residue asphalt according to claim 2, characterized in that: In step S1, the heating temperature is 140-150°C, the heating time is 1-1.5 hours, and the softening point of No. 70 or No. 90 petroleum asphalt is 45-50°C.

4. The method for preparing waterproofing coiled material using composite coal liquefaction residue asphalt according to claim 1, characterized in that: In step S2, the DCLR is ground into powder with a particle size of 40-60 mesh.

5. The method for preparing waterproofing coiled material using composite coal liquefaction residue asphalt according to claim 4, characterized in that: In step S2, the heating temperature is 190-200°C, the heating time is 15-20 minutes, and the softening point of DCLR is 150-170°C.

6. The method for preparing waterproofing coiled material using composite coal liquefaction residue asphalt according to claim 1, characterized in that: In step S3, the amount of DCLR added is 8-12% of the mass percentage of the molten petroleum asphalt, the shearing temperature can be 140-160° C., and the shearing time can be 60-80 min.

7. The method for preparing waterproofing coiled material using composite coal liquefaction residue asphalt according to claim 1, characterized in that: In step S4, the amount of SBS added is 2-3% of the mass percentage of the molten petroleum asphalt, the amount of waste engine oil added is 4-7% of the mass percentage of the molten petroleum asphalt, and the amount of waste rubber powder added is 10-15% of the mass percentage of the molten petroleum asphalt.

8. The method for preparing waterproofing coiled material using composite coal liquefaction residue asphalt according to claim 7, characterized in that: In step S4, the shearing time is 60-80 min, the shearing temperature is 160-180°C, and the development time is 60-80 min; the softening point of the composite DCLR modified asphalt is 80°C-95°C; when the elongation of the composite DCLR modified asphalt is at 25°C, it is greater than 80 mm, and when the needle penetration of the composite DCLR modified asphalt is at 25°C, it is greater than 30 mm.

9. The method for preparing waterproofing coiled material using composite coal liquefaction residue asphalt according to claim 1, characterized in that: In step S5, the tire base is one of a polyester tire, a glass fiber tire and a polyethylene tire.

10. The method for preparing waterproofing coiled material using composite coal liquefaction residue asphalt according to claim 1, characterized in that: In step S6, the isolation film is one of a polyethylene film, a polyester film and a silicone oil film, and the sand is one of a river sand, a quartz sand and a machine-made sand.

Images