Production method and application of waterproof oil felt asphalt with anti-thermal bleeding oil

Abstract

The application belongs to the field of building waterproof materials, and provides a production method and application of waterproof oil felt asphalt resisting hot oil penetration, the production method of the blended asphalt comprising: blending high-flash-point petroleum softening oil and rock asphalt powder according to a mass ratio range of 1:1-2 to obtain waterproof oil felt asphalt resisting hot oil penetration, which is a low-grade asphalt with a softening point higher than 55 DEG C. The application has simple process and reduced cost. Experiments show that, compared with other existing blended asphalt blended according to the same mass ratio or reaching the same softening point, the blended asphalt of high-flash-point softening oil and rock asphalt powder has significantly lower hot oil penetration, and has a significant advantage in the number of oil penetration permeated paper in high-temperature tests.

Description

Technical Field

[0001] This invention belongs to the field of building waterproof materials, and particularly relates to a heat-resistant and oil-permeable waterproof asphalt mat blending formula and process method, specifically a production method and application of heat-resistant and oil-permeable waterproof asphalt mat mat. Background Technology

[0002] Waterproof asphalt felt is a building material generally made by impregnating fiber felt or thick paper blanks with asphalt. It is impermeable to water, has toughness, and can be used as a waterproof layer for roofs, walls, etc. Among them, the heat resistance to oil penetration reflects the heat resistance and high-temperature fluidity of the asphalt in waterproof asphalt felt. The national standard "GB / T18242 Elastomer Modified Bituminous Waterproof Membrane" specifies the oil resistance at 90℃.

[0003] Currently, the asphalt used for waterproofing felts to prevent heat and oil seepage is mostly solvent-deasphalted low-grade asphalt, or a blend of solvent-deasphalted low-grade asphalt. Solvent deasphalting refers to a petroleum product refining process that removes gum and asphalt from vacuum residue obtained from crude oil distillation using extraction methods, producing petroleum asphalt simultaneously with the production of deasphalted oil. Low-grade asphalt refers to two types of asphalt, No. 30 and No. 50, that meet the technical specifications of national standard GB / T 15180 and traffic standard JTC F40.

[0004] However, the heat resistance of existing waterproof asphalt felt to oil penetration needs to be further improved. Summary of the Invention

[0005] In view of this, the purpose of this invention is to provide a method for producing and applying heat-resistant and oil-permeable waterproof asphalt felt. The method provided by this invention can effectively improve the heat-permeability of waterproof asphalt felt and has a low cost.

[0006] This invention provides a method for producing heat-resistant, oil-permeable, and waterproof asphalt felt, comprising:

[0007] High flash point petroleum-based softened oil and rock asphalt powder are blended in a mass ratio of 1:1 to 2 to obtain heat-resistant and oil-permeable waterproof asphalt felt, which is a low-grade asphalt with a softening point higher than 55℃.

[0008] In the embodiments of this application, the high flash point petroleum-based softened oil is a petroleum refining oil or by-product with a flash point higher than 200°C, such as oil slurry, wax oil, or waste engine oil.

[0009] In the embodiments of this application, the rock asphalt powder is natural rock asphalt powder with a particle size exceeding 200 mesh and an ash content of less than 15%.

[0010] In the embodiments of this application, the softening point of the rock asphalt powder is >150℃.

[0011] In the embodiments of this application, the blending process temperature is 170°C to 190°C.

[0012] In the embodiments of this application, the heating rate of the blending process is 6-12°C / h.

[0013] In the embodiments of this application, the stirring speed of the blending process is 100-700 r / min.

[0014] In the embodiments of this application, the mixing time of the blending process is 1.5-4 hours.

[0015] In the embodiments of this application, the penetration of the blended low-grade asphalt is less than 45 dmm.

[0016] This invention provides a waterproof asphalt felt, which is made by impregnating an asphalt felt substrate with low-grade asphalt obtained by the production method described above.

[0017] Compared with existing technologies, this invention produces a waterproof asphalt felt resistant to heat penetration by blending rock asphalt powder and high flash point petroleum-based softening oil in a 1-2:1 mass ratio. The asphalt felt is a low-grade asphalt with a softening point above 55℃. This invention features a simple process and reduced costs. Experiments show that compared with other existing blended asphalts blended in the same mass ratio or reaching the same softening point, the heat penetration of the asphalt blended with high flash point softening oil and rock asphalt powder in this invention is significantly lower, and the number of sheets of paper penetrated during high-temperature tests is less, demonstrating significant advantages. Detailed Implementation

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other instances that are improved or modified by those skilled in the art are within the scope of protection of the present invention. It should be understood that the embodiments of the present invention are only used to illustrate the technical effects of the present invention, and are not intended to limit the scope of protection of the present invention. Unless otherwise specified, the methods used in the embodiments are conventional methods.

[0019] This invention provides a method for producing heat-resistant, oil-permeable, and waterproof asphalt felt, comprising:

[0020] High flash point petroleum-based softened oil and rock asphalt powder are blended in a mass ratio of 1:1 to 2 to obtain heat-resistant and oil-permeable waterproof asphalt felt, which is a low-grade asphalt with a softening point higher than 55℃.

[0021] The blended asphalt produced by this invention can effectively improve the heat permeability of waterproof asphalt felt compared to atmospheric and vacuum distilled asphalt, while also being lower in cost and easier to apply.

[0022] In this embodiment of the invention, high flash point petroleum-based softened oil and rock asphalt powder are mixed at high temperature according to a certain mass ratio to obtain the waterproof asphalt that is resistant to heat and oil seepage.

[0023] Rock asphalt is an asphalt-like substance formed from petroleum through millions of years of sedimentation and change, under the combined effects of heat, pressure, oxidation, catalysts, and bacteria. It possesses extremely high heat resistance, with a softening point generally above 150℃ (the temperature at which an asphalt specimen softens and sags when heated). This invention focuses on developing the heat-resistant and oil-permeable properties of rock asphalt-blended asphalt and standardizes its application, specifically in the field of waterproof asphalt felt. This invention enables the application of rock asphalt in waterproof asphalt felt by adding a certain proportion of high flash point oil components.

[0024] The embodiments of the present invention use commercially available rock asphalt powder, which is natural rock asphalt in powder form with a softening point greater than 150°C, preferably with a softening point greater than 170°C; furthermore, the rock asphalt powder has a particle size of 200 mesh or more, preferably more than 800 mesh, and the ash content of the rock asphalt powder is less than 15%, preferably less than 10%.

[0025] In the embodiments of this application, the specific process of blending includes: first stirring and heating the high flash point petroleum-based softened oil to a relatively high temperature, and then adding rock asphalt powder for mixing and stirring; the mass ratio of the rock asphalt powder to the high flash point petroleum-based softened oil is 1 to 2:1. If the ratio is higher than this, the rock asphalt is difficult to dissolve completely, and the blended asphalt has a high viscosity, making processing difficult; if the ratio is lower than this, the blended asphalt has a low viscosity, the waterproof asphalt felt has poor heat resistance and oil penetration, and oil seeps out and drips at high temperatures.

[0026] The high flash point petroleum-based softened oil refers to petroleum-based oils produced in the petroleum refining industry with a flash point higher than 200℃. It is water-free and has a kinematic viscosity of 30-50 mm / s at 100℃. Examples include petroleum refining oils or byproducts such as slurry oil, wax oil, waste lubricating oil, and extracted oil (collectively referred to as waste engine oil), with slurry oil or extracted oil being preferred. Flash point is an indicator of the volatility of a flammable liquid; it is the lowest temperature at which a liquid vaporizes and ignites under specified test conditions using a certain ignition source.

[0027] Specifically, the blending process involves stirring at a temperature of 170℃-190℃ for 1.5-4 hours at a stirring speed of 100-700 r / min. In the embodiments of this application, the heating temperature for the blending process is 170℃-190℃, preferably 180±5℃. The heating rate for the blending process can be 6-12℃ / h, preferably 6℃ / h; the stirring speed is 200-600 r / min, and conventional stirring and heating equipment can be used.

[0028] In the embodiments of this application, the mixing process is carried out for 1.5-4 hours, preferably 1.5-2.5 hours, until the rock asphalt powder is completely dissolved.

[0029] The waterproof asphalt for heat-resistant and oil-permeable felt produced by this invention is a blended low-grade asphalt; the penetration of the blended low-grade asphalt is less than 45 dmm, and the softening point of the low-grade asphalt is above 55℃.

[0030] This invention provides a waterproof asphalt felt, which is made by impregnating an asphalt felt substrate with low-grade asphalt obtained by the production method described above. In some embodiments of this application, the asphalt felt substrate is asphalt felt fiber cloth, the fiber cloth is 1-2 mm thick, and the unit area mass is >200 g / m². 2 Nonwoven fabrics that can withstand high-temperature hot oil up to 200℃; such as polyester nonwoven fabrics, etc.

[0031] This invention produces a waterproof asphalt for asphalt felt that is resistant to heat and oil penetration by blending high flash point petroleum-based softened oil with rock asphalt in a certain proportion. This improves the heat and oil penetration resistance of the asphalt felt used in this process compared to that of asphalt felt impregnated with ordinary straight-run asphalt, while also ensuring adequate waterproof performance and reducing costs.

[0032] To further understand this application, the following detailed description is provided in conjunction with embodiments. However, it should be understood that these embodiments are implemented based on the technical solution of this invention, providing detailed implementation methods and specific operating procedures, and are only for further illustrating the features and advantages of this invention, not for limiting the scope of the claims of this invention. The protection scope of this invention is not limited to the following embodiments.

[0033] The oil slurry and wax oil used in the following embodiments of the present invention are products provided by Shandong Jingbo Petrochemical Co., Ltd. The oil slurry has a flash point of 215℃ and a kinematic viscosity of 36 mm / s at 100℃; the wax oil has a flash point of 220℃ and a kinematic viscosity of 40 mm / s at 100℃. The waste lubricating oil extract is provided by Shandong Mantek Petrochemical Co., Ltd., with a flash point of 226℃ and a kinematic viscosity of 46 mm / s at 100℃. The rock asphalt is provided by Xuzhou Tianding Building Materials Co., Ltd., with a mesh size of 800 and an ash content of 10%. The asphalt felt fiber cloth is provided by Shandong Qianli Nonwoven Co., Ltd., with a fiber cloth thickness of 1 mm and a unit area mass of 204 g / m². 2 Polyester nonwoven fabric.

[0034] Example 1

[0035] The oil slurry is heated and stirred at a rate of 6℃ / h until the temperature reaches 170℃.

[0036] Add rock asphalt powder and mix at a stirring speed of 400 r / min; the mass ratio of rock asphalt powder to oil slurry is 60:40. Stir at 180℃ for 2.5 h until the rock asphalt is completely dissolved.

[0037] The processed asphalt is impregnated with a 1mm thick polyester nonwoven fabric, and then squeezed dry to make a waterproof asphalt felt. The asphalt felt does not leak or seep water within 30 minutes at 0.02MPa; at the same time, the water absorption rate in water is less than 2%.

[0038] The performance of blended asphalt was tested according to the following methods, and the test results are shown in Table 1. The test method for penetration is T0604-2011, the test method for softening point is T0606-2011, and the test method for the oil resistance of waterproof asphalt felt is GB / T328.11-2007.

[0039] Table 1 Performance test results of Example 1 of the present invention

[0040] Penetration, 25℃, 0.1mm Softening point, ℃ Oil permeability, 90℃ Measured values 30 58 2 sheets

[0041] Example 2

[0042] Heat the wax oil while stirring at a rate of 6°C / h until the temperature reaches 170°C.

[0043] Add rock asphalt powder and mix at a stirring speed of 400 r / min; the mass ratio of rock asphalt powder to wax oil is 65:35. Stir at 180℃ for 2.5 h until the rock asphalt is completely dissolved.

[0044] The processed asphalt was impregnated with a 1mm thick polyester nonwoven fabric, and then squeezed dry to make a waterproof felt. The waterproof performance was qualified, consistent with Example 1.

[0045] The performance of blended asphalt was tested according to the following methods, and the test results are shown in Table 2. The test method for penetration is T0604-2011, the test method for softening point is T0606-2011, and the test method for the oil resistance of waterproof asphalt felt is GB / T328.11-2007.

[0046] Table 2 Performance test results of Example 2 of the present invention

[0047] Penetration, 25℃, 0.1mm Softening point, ℃ Oil permeability, 90℃ Measured values 36 56 2 sheets

[0048] Example 3

[0049] The waste lubricating oil was extracted and heated while being stirred at a rate of 6℃ / h until the temperature reached 170℃.

[0050] Rock bitumen powder was added and mixed at a stirring speed of 400 r / min; the mass ratio of rock bitumen powder to extracted oil was 68:32. The mixture was stirred at 180℃ for 2.5 h until the rock bitumen was completely dissolved.

[0051] The processed asphalt was impregnated with a 1mm thick polyester nonwoven fabric, and then squeezed dry to make a waterproof felt. The waterproof performance was qualified, consistent with Example 1.

[0052] The performance of blended asphalt was tested according to the following methods, and the test results are shown in Table 3. The test method for penetration is T0604-2011, the test method for softening point is T0606-2011, and the test method for oil resistance is GB / T328.11-2007.

[0053] Table 3 Performance test results of Example 3 of the present invention

[0054] Penetration, 25℃, 0.1mm Softening point, ℃ Oil permeability, 90℃ Measured values 34 56 2 sheets

[0055] As can be seen from the above embodiments, the present invention produces heat-resistant and oil-permeable waterproof asphalt felt by blending high flash point petroleum-based softened oil with rock asphalt powder. Compared with solvent-deasphalted asphalt (such as Dalian Hengli Petrochemical solvent-deasphalted asphalt) blended asphalt, the present invention has a significant advantage in terms of heat-resistant and oil-permeable properties. For example, when both types of asphalt have a design softening point of 55°C, the present invention requires two sheets of oil-permeable roll material, while other blended asphalts require three sheets, resulting in lower heat-resistant and oil-permeable properties compared to the present invention.

[0056] The embodiments described herein are merely illustrative examples to clearly illustrate the invention and are not intended to limit the scope of implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here, and these obvious variations or modifications derived from the spirit of the invention remain within the protection scope of the invention.

[0057] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A waterproof asphalt felt, characterized in that, It is made from a base material impregnated with low-grade asphalt; the production method of the low-grade asphalt includes: High flash point petroleum-based softened oil and rock asphalt powder are blended at a mass ratio of 1:1 to 2. The blending process is carried out at a temperature of 170℃ to 190℃ and a heating rate of 6℃ to 12℃ / h to obtain heat-resistant, oil-permeable, and waterproof asphalt felt. This asphalt is a low-grade asphalt with a softening point higher than 55℃. The penetration of the blended low-grade asphalt is less than 45dmm. The high flash point petroleum-based softening oil is a petroleum refining oil or by-product with a flash point higher than 200℃ and a kinematic viscosity of 30-50 mmHg at 100℃. 2 / s; the high flash point petroleum-based softening oil is oil slurry, wax oil or waste engine oil; the rock asphalt powder is natural rock asphalt powder with a particle size exceeding 200 mesh and an ash content of less than 15%; the softening point of the rock asphalt powder is >150℃.

2. The waterproof asphalt felt according to claim 1, characterized in that, In the production method of low-grade asphalt, the mixing speed of the blending process is 100-700 r / min.

3. The waterproof asphalt felt according to claim 2, characterized in that, In the production method of low-grade asphalt, the mixing time of the blending process is 1.5-4 hours.