Porous high-temperature modifier, preparation method and application thereof, modified asphalt, preparation method of modified asphalt and modified asphalt waterproof coiled material

Abstract

The invention discloses a porous high-temperature modifier, a preparation method and application thereof, modified asphalt, a preparation method of the modified asphalt and a modified asphalt waterproof coiled material, the porous high-temperature modifier for the modified asphalt comprises porous silicate and hard asphalt, and the hard asphalt comprises natural asphalt and / or residual oil asphalt. The porous structure of the porous high-temperature modifier disclosed by the invention is riveted with asphalt at normal temperature, so that the anti-sliding performance is improved; and under the condition of high temperature, the riveting effect with asphalt disappears, and the flowability of the asphalt is not influenced.

Description

Technical Field

[0001] The present invention belongs to the technical field of modified asphalt, and more specifically, relates to a porous high-temperature modifier for modified asphalt, a preparation method and application thereof, as well as porous high-temperature modifier-modified asphalt for asphalt waterproofing membrane, a preparation method thereof, and modified asphalt waterproofing membrane. Background Art

[0002] The high temperature performance of polymer modified asphalt waterproofing membrane determines its maximum use temperature. Especially after being exposed to the sun in summer, the surface temperature of asphalt waterproofing membrane can reach above 70℃. If the high temperature performance of waterproofing membrane is poor, the membrane may slip, stick to the feet, leave footprints, etc. after construction, affecting its appearance and construction performance. GB 18242-2008 stipulates that the high temperature performance of elastomer modified asphalt waterproofing membrane must reach a minimum of 90℃, without slipping, flowing or dripping. The softening temperature of conventional 70# petroleum asphalt is about 50℃, so it is necessary to add a certain high temperature modifier to improve its anti-slip ability.

[0003] The high temperature modifiers of modified asphalt coils mainly include low-grade asphalt, polymer modifiers, recycled plastics, rubber, etc. These types of modifiers mainly have the following problems:

[0004] 1) Expensive, especially for polymer modifiers, the amount added to modified asphalt is limited, and it needs to be used in combination with other high-temperature modifiers to meet the high-temperature performance requirements of modified asphalt;

[0005] 2) The high temperature increases significantly, but the viscosity of the modified asphalt increases at the same time, which on the one hand leads to increased processing energy consumption, and on the other hand leads to poor fluidity of the asphalt coating material, making it impossible to normally coat and prepare the coiled material. Summary of the invention

[0006] The purpose of the present invention is to provide a porous high-temperature modifier for modified asphalt, a preparation method and application thereof, as well as a porous high-temperature modifier for asphalt waterproofing membrane, a preparation method thereof and a modified asphalt waterproofing membrane. The porous structure of the porous high-temperature modifier of the present invention produces a "riveting" effect with asphalt at room temperature to improve the anti-slip performance; under high temperature conditions, the "riveting" effect with asphalt disappears and does not affect its fluidity.

[0007] In order to achieve the above objectives, the first aspect of the present invention provides a porous high temperature modifier for modified asphalt, which comprises: porous silicate and hard asphalt, wherein the hard asphalt comprises natural asphalt and / or residual oil asphalt.

[0008] According to the present invention, preferably, the mass ratio of the porous silicate to the hard asphalt is 1:(1-6);

[0009] Preferably, when the hard asphalt comprises natural asphalt and residual oil asphalt, the mass ratio of the porous silicate, the natural asphalt and the residual oil asphalt is 1:(1-3):(1-3);

[0010] Preferably, the porous silicate is at least one of porous sodium silicate, porous magnesium silicate and porous aluminum silicate.

[0011] In the present invention, Figure 1 As shown in the figure, within the use temperature environment of modified asphalt, the modified asphalt is in a gel state and can be embedded into the porous structure of the porous high-temperature modifier, so that the modified asphalt gel state produces a mutual "riveting" effect, which improves the integrity of the modified asphalt coil, thereby improving the anti-slip property of the modified asphalt and its high-temperature performance. When the temperature is raised to the processing temperature of the modified asphalt (180℃~190℃), the asphalt is close to the liquid state. At this time, the asphalt in the porous structure of the porous high-temperature modifier can flow, and the "riveting" effect disappears. Instead, the porous structure plays a physical isolation role in the asphalt, so that the modified asphalt has good processing fluidity.

[0012] Since high temperature modifiers are both petroleum-related main and byproducts, their prices fluctuate with the fluctuation of oil prices, so the price of raw materials fluctuates greatly, affecting the cost control of modified asphalt. The porous high temperature modifier developed by the present invention contains more than two components, and the price fluctuations between different components can be balanced by adjusting the ratio. Therefore, its cost is more stable.

[0013] The second aspect of the present invention provides a method for preparing the porous high-temperature modifier for modified asphalt, the method comprising: crushing the porous silicate and hard asphalt respectively, and then mixing the crushed porous silicate and the crushed hard asphalt uniformly to obtain the porous high-temperature modifier for modified asphalt;

[0014] Preferably, the porous silicate and hard asphalt are crushed into 60-100 mesh powders respectively.

[0015] The third aspect of the present invention provides the use of the above-mentioned porous high-temperature modifier for modified asphalt in modified asphalt.

[0016] The fourth aspect of the present invention provides a porous high temperature modifier modified asphalt for asphalt waterproofing membrane, the modified asphalt comprising: petroleum asphalt, thermoplastic elastomer, lubricant, petroleum resin, coupling agent, antioxidant, the above-mentioned porous high temperature modifier and filler.

[0017] According to the present invention, preferably, in parts by weight, the modified asphalt comprises: 58-65 parts of petroleum asphalt, 8-12 parts of thermoplastic elastomer, 1-2 parts of lubricant, 2-4 parts of petroleum resin, 1-2 parts of coupling agent, 1-2 parts of antioxidant, 7-10 parts of the above-mentioned porous high temperature modifier and 7-17 parts of filler.

[0018] According to the present invention, preferably, the petroleum asphalt is 70# petroleum asphalt and / or 90# petroleum asphalt;

[0019] The thermoplastic elastomer is at least one of linear SBS, linear SIS and linear SEBS;

[0020] The lubricant is zinc stearate and / or polyethylene wax;

[0021] The petroleum resin is C5 petroleum resin and / or C9 petroleum resin;

[0022] The coupling agent is a silane coupling agent and / or maleic anhydride;

[0023] The antioxidant is a hindered phenol antioxidant, preferably 2,6-di-tert-butyl-4-methylphenol and / or bis(3,5-di-tert-butyl-4-hydroxyphenyl) sulfide;

[0024] The filler is at least one of heavy calcium, mineral powder, light calcium and talcum powder.

[0025] The fifth aspect of the present invention provides a method for preparing the porous high temperature modifier modified asphalt for the asphalt waterproofing membrane, the preparation method comprising:

[0026] (1) Stir the petroleum asphalt evenly at a temperature of 130-140°C;

[0027] (2) adding a thermoplastic elastomer to the petroleum asphalt and homogenizing the mixture at 180-190° C. to obtain a first mixture;

[0028] (3) stirring the petroleum resin, the lubricant and the first mixture to obtain a second mixture;

[0029] (4) stirring the coupling agent and the second mixture to obtain a third mixture;

[0030] (5) stirring the porous high temperature modifier according to claim 1 or 2 and the third mixture to obtain a fourth mixture;

[0031] (6) stirring the antioxidant and the fourth mixture to obtain a fifth mixture;

[0032] (7) The filler and the fifth mixture are mixed evenly to obtain the porous high temperature modifier modified asphalt for the asphalt waterproofing membrane.

[0033] According to the present invention, preferably, in step (2), homogenization is performed by stirring or grinding, and the homogenization time is 1-2h;

[0034] In step (3), the stirring temperature is 180-190° C. and the stirring time is 10-15 min;

[0035] In step (4), the stirring temperature is 180-190° C. and the stirring time is 10-15 min;

[0036] In step (5), the stirring temperature is 185-195° C. and the stirring time is 25-35 min;

[0037] In step (6), the stirring temperature is 180-190° C. and the stirring time is 10-15 min;

[0038] In step (7), the stirring temperature is 180-190° C. and the stirring time is 25-35 min.

[0039] A sixth aspect of the present invention provides a modified asphalt waterproofing membrane, which comprises in sequence: a first insulating membrane layer, a first modified asphalt coating layer, a tread layer, a second modified asphalt coating layer and a second insulating membrane layer;

[0040] The modified asphalt coating materials used in the first modified asphalt coating layer and the second modified asphalt coating layer are both the above-mentioned porous high-temperature modifier modified asphalt.

[0041] The technical solution of the present invention has the following beneficial effects:

[0042] (1) The porous high-temperature modifier of the present invention improves the high-temperature performance and fluidity of asphalt through "riveting" modification, while having little effect on low-temperature flexibility. The modification effect is better than that of existing high-temperature modifiers.

[0043] (2) The cost of each component of the porous high-temperature modifier of the present invention is low, which can effectively reduce the cost of modified asphalt and improve economic benefits.

[0044] (3) The porous high-temperature modifier of the present invention includes two or more components, which avoids the cost fluctuation of modified asphalt caused by the price fluctuation of a single high-temperature modifier and contributes to the stable application of the modifier.

[0045] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0047] Figure 1A schematic diagram showing the "riveting" effect of the porous structure of asphalt and a porous high temperature modifier according to the present invention.

[0048] Figure 2 A micrograph of the porous structure of a porous high temperature modifier according to Example 3 of the present invention is shown. DETAILED DESCRIPTION

[0049] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0050] The present invention is further described below by examples:

[0051] In the following embodiments and comparative examples:

[0052] The SBS used was Yanshan Petrochemical SBS 4402;

[0053] The polyethylene wax used was purchased from Reiler Chemical Company;

[0054] The particle size of the talcum powder used is 200 mesh;

[0055] The polypropylene used was commercially available recycled polypropylene granules IPP with a softening point of 120°C;

[0056] The porous silicate used is porous aluminum silicate.

[0057] Example 1

[0058] This embodiment provides a porous high-temperature modifier for modified asphalt, which comprises: porous silicate and residual oil asphalt, wherein the mass ratio of the porous silicate to the residual oil asphalt is 1:4.

[0059] The specific preparation method of the porous high temperature modifier for modified asphalt is: crushing the porous silicate and residual oil asphalt into 80-100 mesh powder respectively, and then mixing the crushed porous silicate and the crushed residual oil asphalt evenly to obtain the porous high temperature modifier for modified asphalt.

[0060] This embodiment provides a porous high temperature modifier modified asphalt for asphalt waterproofing membrane, the specific formula is shown in the following table, and the specific preparation method is as follows:

[0061] (1) Stir the petroleum asphalt evenly at a temperature of 135°C;

[0062] (2) adding a thermoplastic elastomer to the petroleum asphalt, and performing a homogenization treatment by grinding at 185° C. for 1.5 hours to obtain a first mixture;

[0063] (3) stirring the petroleum resin, the lubricant and the first mixture to obtain a second mixture; wherein the stirring temperature is 185° C. and the stirring time is 13 minutes;

[0064] (4) stirring the coupling agent and the second mixture to obtain a third mixture; wherein the stirring temperature is 185° C. and the stirring time is 13 min;

[0065] (5) stirring the porous high temperature modifier and the third mixture to obtain a fourth mixture; wherein the stirring temperature is 190° C. and the stirring time is 30 min;

[0066] (6) stirring the antioxidant and the fourth mixture to obtain a fifth mixture; wherein the stirring temperature is 185° C. and the stirring time is 13 min;

[0067] (7) The filler and the fifth mixture are stirred evenly to obtain the porous high temperature modifier modified asphalt for the asphalt waterproofing membrane; wherein the stirring temperature is 185° C. and the stirring time is 30 minutes.

[0068] The present embodiment provides a modified asphalt waterproofing membrane, which comprises in sequence: a first isolation membrane layer, a first modified asphalt coating layer, a tread base layer, a second modified asphalt coating layer and a second isolation membrane layer; the modified asphalt coating used in the first modified asphalt coating layer and the second modified asphalt coating layer are both porous high-temperature modifier modified asphalt prepared in Example 1.

[0069] The specific preparation method is as follows:

[0070] (1) Pre-impregnate the dried long-fiber polyester base at 180°C; wherein the weight of the long-fiber polyester base is 250 g / m 2 The pre-impregnation oil used for pre-impregnation is composed of 70# petroleum asphalt and the porous high-temperature modifier prepared in Example 1, and the mass ratio of 70# petroleum asphalt to the porous high-temperature modifier prepared in Example 1 is 7:3;

[0071] (2) placing the pre-impregnated polyester tire base into an oil coating tank at 180° C. to coat both sides with a coating material; the coating material used is the porous high-temperature modifier-modified asphalt prepared in Example 1;

[0072] (3) After coating, the coating is passed through a thickness setting roller to a thickness of 4 mm ± 0.05 mm.

[0073] (4) After the thickness is set, it enters the water bed and is cooled to below 130°C;

[0074] (5) After cooling, cover the lower surface with a PE isolation film and continue cooling the coil;

[0075] (6) Cover the surface with PE isolation film and continue to cool the finished product.

[0076] (7) After the coil is cooled to 20-40℃, it is coded and packaged.

[0077] Table 1

[0078]

[0079]

[0080] Example 2

[0081] This embodiment provides a porous high-temperature modifier for modified asphalt, which includes porous silicate and natural asphalt, and the mass ratio of the porous silicate to the natural asphalt is 1:4.

[0082] The specific preparation method of the porous high temperature modifier for modified asphalt is: crushing the porous silicate and natural asphalt into 80-100 mesh powder respectively, and then mixing the crushed porous silicate and crushed natural asphalt evenly to obtain the porous high temperature modifier for modified asphalt.

[0083] This embodiment provides a porous high temperature modifier modified asphalt for asphalt waterproofing membrane. The specific formula is shown in the table below, and the specific preparation method is the same as that of Example 1.

[0084] The present embodiment provides a modified asphalt waterproofing membrane, which comprises in sequence: a first isolation membrane layer, a first modified asphalt coating layer, a tread base layer, a second modified asphalt coating layer and a second isolation membrane layer; the modified asphalt coating used in the first modified asphalt coating layer and the second modified asphalt coating layer are both porous high-temperature modifier modified asphalt prepared in Example 2.

[0085] The preparation method of the waterproof membrane of this embodiment differs from that of Embodiment 1 only in that: (1) the pre-impregnation oil used for pre-impregnation is composed of 70# petroleum asphalt and the porous high-temperature modifier prepared in Embodiment 2, and the mass ratio of 70# petroleum asphalt to the porous high-temperature modifier prepared in Embodiment 2 is 7:3; (2) the coating material used is the asphalt modified by the porous high-temperature modifier prepared in Embodiment 2.

[0086] Table 2

[0087]

[0088]

[0089] Example 3

[0090] This embodiment provides a porous high-temperature modifier for modified asphalt, which includes porous silicate, natural asphalt and residual oil asphalt, and the mass ratio of the porous silicate, natural asphalt and residual oil asphalt is 1:2:2.

[0091] The specific preparation method of the porous high-temperature modifier for modified asphalt is: crush the porous silicate, natural asphalt and residual oil asphalt into 80-100 mesh powder respectively, and then mix the crushed porous silicate, crushed natural asphalt and crushed residual oil asphalt evenly to obtain the porous high-temperature modifier for modified asphalt.

[0092] This embodiment provides a porous high temperature modifier modified asphalt for asphalt waterproofing membrane. The specific formula is shown in the table below, and the specific preparation method is the same as that of Example 1.

[0093] The present embodiment provides a modified asphalt waterproofing membrane, which comprises in sequence: a first isolation membrane layer, a first modified asphalt coating layer, a tread base layer, a second modified asphalt coating layer and a second isolation membrane layer; the modified asphalt coating used in the first modified asphalt coating layer and the second modified asphalt coating layer are both porous high-temperature modifier modified asphalt prepared in Example 3.

[0094] The preparation method of the waterproof membrane of this embodiment differs from that of Embodiment 1 only in that: (1) the pre-impregnation oil used for pre-impregnation is composed of 70# petroleum asphalt and the porous high-temperature modifier prepared in Embodiment 3, and the mass ratio of 70# petroleum asphalt to the porous high-temperature modifier prepared in Embodiment 3 is 7:3; (2) the coating material used is the asphalt modified by the porous high-temperature modifier prepared in Embodiment 3.

[0095] Table 3

[0096] formula Weight 70# Petroleum Asphalt 60 servings SBS (thermoplastic elastomer) 10 servings C9 Petroleum Resin 2 servings Polyethylene wax (lubricant) 1 serving Maleic anhydride (coupling agent) 2 servings Porous high temperature modifier (prepared in Example 3) 9 servings 2,6-Di-tert-butyl-4-methylphenol (antioxidant) 1 serving Talc (filler) 15 servings project Performance test value Rational viscosity / dPa·s 140 Softening point / ℃ 125 Heat resistance / ℃ 130 Low temperature flexibility / ℃ -26.8 Seam peel strength, N / mm 2.40

[0097] Comparative Example 1

[0098] This comparative example provides a high temperature modifier modified asphalt for asphalt waterproofing membrane, and the specific formula is shown in the table below;

[0099] The specific preparation method is different from that of Example 1 only in step (5), which is: stirring the polypropylene and the third mixture evenly to obtain a fourth mixture; wherein the stirring temperature is 190° C. and the stirring time is 30 min.

[0100] This comparative example provides a modified asphalt waterproofing membrane, which comprises in sequence: a first insulating membrane layer, a first modified asphalt coating layer, a tread base layer, a second modified asphalt coating layer and a second insulating membrane layer; the modified asphalt coating used in the first modified asphalt coating layer and the second modified asphalt coating layer are both high-temperature modifier modified asphalt prepared in comparative example 1.

[0101] The preparation method of the waterproof membrane of this comparative example differs from that of Example 1 only in that: (1) the pre-impregnation oil used for pre-impregnation is composed of 70# petroleum asphalt and polypropylene, and the mass ratio of 70# petroleum asphalt to polypropylene is 7:3; (2) the coating material used is the high-temperature modifier modified asphalt prepared in Comparative Example 1.

[0102] Table 4

[0103] formula Weight 70# Petroleum Asphalt 60 servings SBS (thermoplastic elastomer) 10 servings C9 Petroleum Resin 2 servings Polyethylene wax (lubricant) 1 serving Maleic anhydride (coupling agent) 2 servings Polypropylene (polymer modifier) 9 servings 2,6-Di-tert-butyl-4-methylphenol (antioxidant) 1 serving Talc (filler) 15 servings project Performance test value Rational viscosity / dPa·s 320 Softening point / ℃ 115 Heat resistance / ℃ 130 Low temperature flexibility / ℃ -25.4 Seam peel strength, N / mm 2.25

[0104] Comparative Example 2

[0105] This comparative example provides a high temperature modifier modified asphalt for asphalt waterproofing membrane, and the specific formula is shown in the table below;

[0106] The specific preparation method differs from that of Example 1 only in step (5), which is: stirring the residual oil asphalt and the third mixture evenly to obtain a fourth mixture; wherein the stirring temperature is 190° C. and the stirring time is 30 min.

[0107] This comparative example provides a modified asphalt waterproofing membrane, which comprises in sequence: a first isolation membrane layer, a first modified asphalt coating layer, a tread base layer, a second modified asphalt coating layer and a second isolation membrane layer; the modified asphalt coating used in the first modified asphalt coating layer and the second modified asphalt coating layer are both high-temperature modifier modified asphalt prepared in comparative example 2.

[0108] The preparation method of the waterproof membrane of this comparative example differs from that of Example 1 only in that: (1) the pre-impregnation oil used for pre-impregnation is composed of 70# petroleum asphalt and residual oil asphalt, and the mass ratio of 70# petroleum asphalt to residual oil asphalt is 7:3; (2) the coating material used is the high-temperature modifier modified asphalt prepared in Comparative Example 2.

[0109] Table 5

[0110] formula Weight 70# Petroleum Asphalt 60 servings SBS (thermoplastic elastomer) 10 servings C9 Petroleum Resin 2 servings Polyethylene wax (lubricant) 1 serving Maleic anhydride (coupling agent) 2 servings Residue asphalt (hard asphalt modifier) 9 servings 2,6-Di-tert-butyl-4-methylphenol (antioxidant) 1 serving Talc (filler) 15 servings

[0111] project Performance test value Rational viscosity / dPa·s 280 Softening point / ℃ 110 Heat resistance / ℃ 125 Low temperature flexibility / ℃ -23.0 Seam peel strength, N / mm 2.30

[0112] Test Example 1

[0113] The viscosity and softening point of the modified asphalt prepared in the above examples and comparative examples were tested. The specific test results are shown in Tables 1-5 above. The viscosity test method of the modified asphalt is as follows: the viscosity of the modified asphalt is tested at 180°C using a No. 2 rotor of a viscometer. The softening point is based on GB / T 4507-2014.

[0114] The heat resistance, low temperature flexibility and peel strength of the waterproof membranes prepared in the above embodiments and comparative examples were tested. The specific test results are shown in Tables 1-5 above; wherein, the heat resistance refers to GB / T 328.11-2007B method; the low temperature flexibility refers to GB / T328.14-2007; and the seam peel strength refers to GB / T 328.20 2007.

[0115] It can be seen from Tables 1 to 5 that the components of the porous high-temperature modifier in Example 1 are silicate minerals and residual oil asphalt. It can be seen from the data in the tables of the examples and comparative examples that the porous high-temperature modifier has the same effect on improving high-temperature performance as the polymer modifier, but the modified asphalt has a lower viscosity, good fluidity, and is easy to process and transport, and has a smaller weakening effect on low-temperature performance than the ordinary high-temperature modifier.

[0116] Example 2 The components of the porous high temperature modifier are silicate minerals and natural asphalt. From the data in the table of the example, it can be seen that when the porous high temperature modifier contains natural asphalt, the high temperature performance is more significantly improved than that of residual oil asphalt, and the modified asphalt has better low temperature performance.

[0117] The components of the porous high temperature modifier of Example 3 are silicate minerals, natural asphalt and residual oil asphalt. From the data in the table of the examples and comparative examples, it can be seen that after the three components are combined, the porous high temperature modifier can improve the high temperature performance as much as the polymer modifier, and the low temperature performance is better.

[0118] The polymer high temperature modifier in Comparative Example 1 is polypropylene. It can be seen from the data in the comparative example table that the polymer high temperature modifier can effectively improve the high temperature performance of the modified asphalt, but it will cause the viscosity of the modified asphalt to be too high, making it difficult to process and consuming a lot of processing energy, and it will also cause the low temperature flexibility of the modified asphalt to deteriorate.

[0119] Comparative Example 2 is a hard asphalt high temperature modifier. From the data in the comparative table, it can be seen that the hard asphalt high temperature modifier can also effectively improve the high temperature performance of the modified asphalt, but it will cause the modified asphalt to have too high viscosity, making it difficult to process and requiring high processing energy consumption. In addition, it has a greater negative impact on low temperature performance than polymer high temperature modifiers.

[0120] Test Example 2

[0121] The porous high temperature modifier prepared in Example 3 was observed under a microscope (OLYMPUS optical microscope, magnification of 10×20 times). The observation results are as follows: Figure 2 shown.

[0122] Depend on Figure 2 It can be seen that the surface of the silicate powder in the porous high-temperature modifier is a porous structure. On the one hand, its surface area is larger and has a strong adsorption effect; on the other hand, the asphalt flowing under high temperature conditions can enter the pores and form "riveting" after cooling, thereby improving the asphalt's anti-slip performance.

[0123] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A porous high temperature modifier for modified asphalt, characterized in that: The porous high-temperature modifier for modified asphalt comprises: porous silicate and hard asphalt, and the hard asphalt comprises natural asphalt and / or residual oil asphalt.

2. The porous high-temperature modifier for modified asphalt according to claim 1, wherein: The mass ratio of the porous silicate to the hard asphalt is 1:(1-6); Preferably, when the hard asphalt comprises natural asphalt and residual oil asphalt, the mass ratio of the porous silicate, the natural asphalt and the residual oil asphalt is 1:(1-3):(1-3); Preferably, the porous silicate is at least one of porous sodium silicate, porous magnesium silicate and porous aluminum silicate.

3. The method for preparing the porous high-temperature modifier for modified asphalt according to claim 1 or 2, characterized in that: The preparation method comprises: crushing the porous silicate and the hard asphalt respectively, and then uniformly mixing the crushed porous silicate and the crushed hard asphalt to obtain the porous high-temperature modifier for modified asphalt; Preferably, the porous silicate and hard asphalt are crushed into 60-100 mesh powders respectively.

4. Use of the porous high temperature modifier for modified asphalt according to claim 1 or 2 in modified asphalt.

5. A porous high temperature modifier modified asphalt for asphalt waterproofing membrane, characterized in that: The modified asphalt comprises: petroleum asphalt, thermoplastic elastomer, lubricant, petroleum resin, coupling agent, antioxidant, the porous high-temperature modifier according to claim 1 or 2 and filler.

6. The modified asphalt according to claim 5, wherein: In parts by weight, the modified asphalt comprises: 58-65 parts of petroleum asphalt, 8-12 parts of thermoplastic elastomer, 1-2 parts of lubricant, 2-4 parts of petroleum resin, 1-2 parts of coupling agent, 1-2 parts of antioxidant, 7-10 parts of the porous high temperature modifier according to claim 1 or 2 and 7-17 parts of filler.

7. The modified asphalt according to claim 5 or 6, wherein: The petroleum asphalt is 70# petroleum asphalt and / or 90# petroleum asphalt; The thermoplastic elastomer is at least one of linear SBS, linear SIS and linear SEBS; The lubricant is zinc stearate and / or polyethylene wax; The petroleum resin is C5 petroleum resin and / or C9 petroleum resin; The coupling agent is a silane coupling agent and / or maleic anhydride; The antioxidant is a hindered phenol antioxidant, preferably 2,6-di-tert-butyl-4-methylphenol and / or bis(3,5-di-tert-butyl-4-hydroxyphenyl) sulfide; The filler is at least one of heavy calcium, mineral powder, light calcium and talcum powder.

8. The method for preparing the porous high temperature modifier modified asphalt for asphalt waterproofing membrane according to any one of claims 5 to 7, characterized in that: The preparation method comprises: (1) Stir the petroleum asphalt evenly at a temperature of 130-140°C; (2) adding a thermoplastic elastomer to the petroleum asphalt and homogenizing the mixture at 180-190° C. to obtain a first mixture; (3) stirring the petroleum resin, the lubricant and the first mixture to obtain a second mixture; (4) stirring the coupling agent and the second mixture to obtain a third mixture; (5) stirring the porous high temperature modifier according to claim 1 or 2 and the third mixture to obtain a fourth mixture; (6) stirring the antioxidant and the fourth mixture to obtain a fifth mixture; (7) The filler and the fifth mixture are mixed evenly to obtain the porous high temperature modifier modified asphalt for the asphalt waterproofing membrane.

9. The preparation method according to claim 8, wherein: In step (2), homogenization is performed by stirring or grinding, and the homogenization time is 1-2 hours; In step (3), the stirring temperature is 180-190° C. and the stirring time is 10-15 min; In step (4), the stirring temperature is 180-190° C. and the stirring time is 10-15 min; In step (5), the stirring temperature is 185-195° C. and the stirring time is 25-35 min; In step (6), the stirring temperature is 180-190° C. and the stirring time is 10-15 min; In step (7), the stirring temperature is 180-190° C. and the stirring time is 25-35 min.

10. A modified asphalt waterproofing membrane, characterized in that: The modified asphalt waterproofing coiled material comprises in sequence: a first isolation membrane layer, a first modified asphalt coating layer, a tread base layer, a second modified asphalt coating layer and a second isolation membrane layer; The modified asphalt coating materials used in the first modified asphalt coating layer and the second modified asphalt coating layer are both porous high-temperature modifier modified asphalt as described in any one of claims 5-7.

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