Color-changing isolation sand and its preparation method, modified bitumen waterproof membrane and its preparation method

Abstract

This invention relates to the field of waterproof membranes, and discloses color-changing isolation sand and its preparation method, as well as modified bitumen waterproof membrane and its preparation method. The method includes: (1) pretreating raw sand to obtain pretreated sand; (2) activating the pretreated sand in an acidic solution containing a silane coupling agent to obtain activated sand; (3) sequentially impregnating and heating the activated sand and a perovskite solution to obtain color-changing isolation sand; the mass fraction of the perovskite solution is 10-20 wt%, and the mass ratio of the pretreated sand to the perovskite solution is 1:2-4. The color-changing isolation sand prepared by this invention, when applied to modified bitumen waterproof membranes, can effectively improve the adhesion between the sand layer and the bitumen adhesive, prevent sand shedding and long-term aging resistance during later use, while reducing the difficulty of membrane overlap construction and improving the overlap strength and reliability of the membrane.

Description

Technical Field

[0001] This invention relates to the field of waterproof membrane technology, specifically to color-changing isolation sand and its preparation method, and modified bitumen waterproof membrane and its preparation method. Background Technology

[0002] SBS hot-melt modified bitumen waterproof membrane is the best-selling and most widely used waterproof membrane in the waterproof membrane industry. Its excellent physical properties make it widely used in underground and roof waterproofing projects.

[0003] However, the aforementioned waterproof membrane materials are difficult to fully adhere during construction, which leads to a decrease in construction convenience and reliability. Especially when the membranes overlap, due to differences in heating temperature and methods, defects such as weak or incomplete overlaps are easily caused, which is also the main cause of water leakage in the waterproof layer.

[0004] Therefore, developing a type of insulating sand that can effectively reduce the construction difficulty of membrane overlap is of great research significance. Summary of the Invention

[0005] The purpose of this invention is to overcome the problem of the high difficulty in construction of roll material overlapping in the existing technology.

[0006] To achieve the above objectives, a first aspect of the present invention provides a method for preparing color-changing isolation sand, the method comprising: (1) The raw sand is pretreated to obtain pretreated sand; (2) The pretreated sand is activated in an acidic solution containing a silane coupling agent to obtain activated sand; (3) The activated sand and perovskite solution are impregnated and heated in sequence to obtain discoloration isolation sand; The perovskite solution has a mass fraction of 10-20 wt%, and the mass ratio of the pretreated sand to the perovskite solution is 1:2-4.

[0007] A second aspect of the present invention provides color-changing isolation sand prepared by the method described in the first aspect above.

[0008] A third aspect of the present invention provides a modified bitumen waterproof membrane, the waterproof membrane comprising a color-changing isolation sand layer, a modified bitumen coating I, a substrate layer and a modified bitumen coating II, which are stacked sequentially. The material forming the color-changing isolation sand layer is the color-changing isolation sand described in the second aspect above.

[0009] A fourth aspect of the present invention provides a method for preparing the modified bitumen waterproof membrane described in the third aspect above, the method comprising: S1. A modified asphalt coating I is provided on the lower surface of the carcass layer, and a modified asphalt coating II is provided on the upper surface of the carcass layer; S2. A color-changing isolation sand layer is provided on the side of the modified asphalt coating I that is not adhered to the body layer, thereby obtaining the modified asphalt waterproof membrane.

[0010] The method for preparing color-changing isolation sand provided by this invention is simple, highly operable, and suitable for industrial production.

[0011] The color-changing isolation sand prepared by the preparation method provided by the present invention can be used in waterproof membranes to effectively improve the adhesion between the sand layer and the asphalt adhesive, prevent sand loss and long-term aging resistance during later use, while reducing the difficulty of membrane overlap construction and improving the overlap strength and reliability of the membrane.

[0012] During the overlapping construction process of the modified bitumen waterproof membrane provided by this invention, when the material surface reaches the melting temperature of 130℃~200℃, the material surface will change color, which greatly avoids the large area of ​​the material being stuck due to insufficient heating and melting, or effectively reduces the risk of material damage, performance degradation and reliability reduction due to excessive heating and melting. Detailed Implementation

[0013] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0014] In this invention, ash content refers to the percentage of the mass of the residue relative to the mass of the original sample.

[0015] As previously described, a first aspect of the present invention provides a method for preparing color-changing isolation sand, the method comprising: (1) The raw sand is pretreated to obtain pretreated sand; (2) The pretreated sand is activated in an acidic solution containing a silane coupling agent to obtain activated sand; (3) The activated sand and perovskite solution are impregnated and heated in sequence to obtain discoloration isolation sand; The perovskite solution has a mass fraction of 10-20 wt%, and the mass ratio of the pretreated sand to the perovskite solution is 1:2-4.

[0016] In some embodiments, in step (1), the raw material sand is schist and / or reactive sand.

[0017] Preferably, the raw material sand has an average particle diameter of 420-1500 μm and a specific surface area of ​​0.02-0.07 m². 2 / g.

[0018] In a preferred embodiment, in step (2), the pH value of the acidic solution is 4-5.

[0019] Preferably, in step (2), the mass ratio of the pretreated sand to the silane coupling agent is 1:0.05-0.2.

[0020] In a preferred embodiment, in step (2), the mass ratio of the pretreated sand to the acidic solution is 1:1-4.

[0021] According to a preferred embodiment, in step (1), the pretreatment is performed by plasma treatment, and the plasma treatment time is 0.5-5 min.

[0022] It should be noted that the plasma treatment described in this invention refers to bombarding the material surface with air, oxygen, or nitrogen plasma that has been ionized by high frequency and high voltage.

[0023] In a preferred embodiment, in step (2), the activation treatment conditions include: a temperature of 50-60°C and a time of 1-3 hours.

[0024] Preferably, in step (3), the conditions for the impregnation treatment include: a temperature of 40-60°C and a time of 30-60 min; In a preferred embodiment, the heat treatment conditions in step (3) include: a temperature of 120-160°C and a holding time of 30-60 min. The inventors of this invention have discovered that under this preferred embodiment, the perovskite can fully crystallize, resulting in a solid, firm structure with uniform color and discoloration.

[0025] Preferably, the solvent in the perovskite solution is a polar organic solvent.

[0026] In a preferred embodiment, the solvent in the perovskite solution is at least one of N,N-dimethylformamide (DMF) and dimethyl sulfoxide.

[0027] According to another preferred embodiment, the method further includes: in step (3), the impregnated material is first filtered to obtain a solid, and then the solid is dried and then heated.

[0028] The present invention does not impose any particular requirements on the filtering method, and those skilled in the art can choose according to known technical means in the field.

[0029] The present invention does not impose special requirements on the drying conditions, and those skilled in the art can select them according to known techniques. Exemplarily, the drying process is carried out by baking at a temperature of 70-90°C for 20-40 minutes. As previously stated, a second aspect of the present invention provides color-changing isolation sand prepared by the method described in the first aspect.

[0030] As mentioned above, a third aspect of the present invention provides a modified bitumen waterproof membrane, which includes a color-changing isolation sand layer, a modified bitumen coating I, a substrate layer and a modified bitumen coating II stacked sequentially. The material forming the color-changing isolation sand layer is the color-changing isolation sand described in the second aspect above.

[0031] In some embodiments, to ensure the feasibility and convenience of construction, the waterproof membrane further includes an isolation layer disposed above the modified bitumen coating II.

[0032] Preferably, the isolation layer is a PE (polyethylene) isolation film.

[0033] According to a preferred embodiment, based on the total mass of the asphalt mixture I forming the modified asphalt coating I, the asphalt mixture I contains 35-60 wt% base asphalt I, 3-8 wt% rubber oil I, 2-7 wt% modifier I, 0.5-3 wt% acrylic resin I, 6-18 wt% tire rubber powder I, and 20-40 wt% filler I.

[0034] Preferably, based on the total mass of the asphalt mixture I forming the modified asphalt coating I, the asphalt mixture I contains 40-50 wt% base asphalt I, 5-8 wt% rubber oil I, 4-7 wt% modifier I, 1-3 wt% acrylic resin I, 8-12 wt% tire rubber powder I and 25-35 wt% filler I.

[0035] Preferably, based on the total mass of the asphalt mixture II forming the modified asphalt coating II, the asphalt mixture II contains 35-60 wt% base asphalt II, 3-8 wt% rubber oil II, 2-7 wt% modifier II, 0.5-3 wt% acrylic resin II, 6-18 wt% tire rubber powder II and 20-40 wt% filler II.

[0036] In a preferred embodiment, based on the total mass of the asphalt mixture II forming the modified asphalt coating II, the asphalt mixture II contains 40-50 wt% base asphalt II, 5-8 wt% rubber oil II, 4-7 wt% modifier II, 1-3 wt% acrylic resin II, 8-12 wt% tire rubber powder II, and 25-35 wt% filler II.

[0037] Preferably, acrylic resin I and acrylic resin II each independently satisfy the following conditions: acid value of 6-20 mg KOH / g, glass transition temperature of 40-80℃, and softening point of 120-160℃. The inventors of this invention have discovered that, under this preferred condition, the acrylic resin exhibits good compatibility with the system, greater aging resistance, and higher peel strength.

[0038] In a preferred embodiment, modifier I and modifier II are each independently selected from at least one of styrene-butadiene-styrene triblock copolymer, styrene-butadiene rubber, hydrogenated styrene-butadiene block copolymer, and styrene-isoprene-styrene block copolymer.

[0039] Preferably, filler I and filler II are each independently selected from at least one of talc, superphosphate, montmorillonite, and kaolin.

[0040] Preferably, the material forming the carcass layer has a density of 180-310 g / m³ after being pre-impregnated with asphalt. 2 Polyester base material.

[0041] Preferably, the tire rubber powder I and the tire rubber powder II each independently satisfy the following: the average particle diameter is 175-500μm and the ash content is 8-15wt%.

[0042] In a preferred embodiment, the thickness of the modified bitumen waterproof membrane is 3.0-5.0 mm.

[0043] This invention does not impose specific requirements on the thickness of the color-changing isolation sand layer, the modified bitumen coating I, the substrate layer, and the modified bitumen coating II in the modified bitumen waterproof membrane. Those skilled in the art can make selections based on conventional technical means in the field. This invention will not elaborate further here, and those skilled in the art should not understand this as a limitation of the invention.

[0044] As previously stated, a fourth aspect of the present invention provides a method for preparing the modified bitumen waterproof membrane described in the third aspect, the method comprising: S1. A modified asphalt coating I is provided on the lower surface of the carcass layer, and a modified asphalt coating II is provided on the upper surface of the carcass layer; S2. A color-changing isolation sand layer is provided on the side of the modified asphalt coating I that is not adhered to the body layer, thereby obtaining the modified asphalt waterproof membrane.

[0045] According to one specific embodiment, the method for preparing the modified bitumen waterproof membrane includes: (i) The base asphalt and the rubber oil are added to a reactor preheated to 140-160°C. After stirring for 20 minutes, the modifier, the tire rubber powder, and the acrylic resin are added. The mixture is stirred and kept at 170-190°C for 2-4 hours. After the mixture is completely dispersed and swollen, the filler is added and stirred for 0.5-1.5 hours to ensure that the filler is evenly dispersed, thus obtaining the asphalt mixture. (ii) The polyester carcass pre-impregnated with asphalt is immersed in the asphalt mixture and then discharged to form an intermediate material; (iii) At 110-150°C, one side of the intermediate material is covered with color-changing isolation sand, and after cooling, the other side is covered with an isolation film to obtain the modified bitumen waterproof membrane.

[0046] The present invention will be described in detail below through examples. Unless otherwise specified, the instruments, reagents, and materials involved in the following examples are all conventional instruments, reagents, and materials, which can be obtained through legitimate commercial channels. Unless otherwise stated, all reagents used are commercially available analytical grade products.

[0047] Raw material sand: Raw material sand I: Reaction sand, with an average particle diameter of 595 μm and a specific surface area of ​​0.046 m². 2 / g, purchased from Beijing Hualin Ruisi Technology Co., Ltd., brand name 240C.

[0048] Raw material sand II: schist, with an average particle diameter of 830 μm and a specific surface area of ​​0.031 m². 2 / g, purchased from Jiangsu Owens Colored Sand Technology Co., Ltd., grade II.

[0049] Raw material sand III: schist, with an average particle diameter of 420 μm and a specific surface area of ​​0.065 m². 2 / g, purchased from Chifeng Jinjinyu Building Materials Company, grade II.

[0050] Raw material sand IV: Reaction sand, with an average particle diameter of 200 μm and a specific surface area of ​​0.136 m². 2 / g, purchased from Beijing Hualin Ruisi Technology Co., Ltd., brand name 80.

[0051] Perovskite solution: Perovskite solution I: with a mass fraction of 15 wt%, was prepared by mixing formamidin lead bromide (purchased from Shanghai Yuanye Biotechnology Co., Ltd.) with solvent DMF, followed by filtration and defoaming.

[0052] Perovskite Solution II: with a mass fraction of 18 wt%, it was prepared by mixing formamidin lead iodide (purchased from Guangdong Wengjiang Reagent Company) with solvent DMF, followed by filtration and defoaming.

[0053] Acidic solution containing silane coupling agent: Add 3g of silane coupling agent (KH-560) to about 95g of water to prepare the solution. Adjust the pH to 5 using acetic acid / sodium acetate. The mass fraction of silane coupling agent in this acidic solution is about 3wt%.

[0054] The material forming the carcass layer is a pre-impregnated base asphalt with a basis weight of 310 g / m². 2 The polyester base material was purchased from Hubei Youbu Nonwoven Fabric Co., Ltd., and its grade is National Standard Type II.

[0055] The base bitumen I and base bitumen II are the same, purchased from Jingbo Petrochemical Company, and the grade is 70#.

[0056] Rubber oil I and rubber oil II are both aromatic oils, purchased from Guangzhou Dagang Company, with the grade A1820.

[0057] Modifier I and Modifier II are the same, purchased from Yueyang Petrochemical Company, with the brand name 1901H.

[0058] Tire rubber powder I and tire rubber powder II are the same, both meeting the following requirements: average particle diameter of 425μm, ash content of 10wt%, purchased from Sichuan Zhongyu Rubber & Plastics Co., Ltd.

[0059] Acrylic resin: Acrylic resin-1: acid value of 14 mg KOH / g, glass transition temperature of 58℃, softening point of 138℃, purchased from Hangzhou Changjie New Materials Co., Ltd., grade 808N.

[0060] Acrylic resin-2: acid value of 6 mg KOH / g, glass transition temperature of 6℃, softening point of 45℃, purchased from Guangzhou Youlike Chemical Co., Ltd., grade 701C.

[0061] Filler: Calcium powder, purchased from Jiangxi Guangyuan Sales Co., Ltd., grade 1500.

[0062] Release film: PE release film, purchased from Cangzhou Zhaoyang Paper & Plastic Co., Ltd., grade 0.01mm.

[0063] The following preparation examples and comparative preparation examples are used to illustrate the preparation of color-changing isolation sand.

[0064] Preparation Example 1 This preparation example illustrates the preparation of color-changing isolation sand according to the formulation in Table 1 and the following steps: (1) The raw sand is pretreated (specifically, it is plasma treated for 3 minutes in air medium and at 4kW power) to obtain pretreated sand; (2) In an acidic solution containing a silane coupling agent, the pretreated sand and the silane coupling agent are activated (at 50°C, stirred for 2 hours) to obtain activated sand; (3) The activated sand and perovskite solution are first impregnated (at a temperature of 50°C for 45 minutes). The impregnated material is first filtered to obtain a solid. Then the solid is dried (drying at 80°C for 30 minutes). After heating, it is cooled and sieved to obtain color-changing isolation sand.

[0065] Table 1

[0066] Unless otherwise specified, Preparation Examples 2-3 were carried out using a method similar to that of Preparation Example 1, except for the formulation and process conditions, as shown in Table 1; the parts not listed were the same as those in Preparation Example 1, and the resulting color-changing isolation sand was named Isolation Sand 2 and Isolation Sand 3, respectively.

[0067] Preparation Example 4 This preparation example is carried out using a method similar to that of preparation example 1, except that in step (3), the temperature of the heat treatment is adjusted to 90°C; For the parts not listed, the same as in Preparation Example 1 was used to obtain color-changing isolation sand, which was named Isolation Sand 4.

[0068] Preparation Example 5 This comparative preparation example was prepared using a method similar to that of Preparation Example 1, except that: In step (1), raw material sand I is replaced with raw material sand IV to obtain pretreated sand; For the parts not listed, the same as in Preparation Example 1 was used to obtain color-changing isolation sand, which was named Isolation Sand 5.

[0069] Comparative Preparation Example 1 This comparative preparation example was prepared using a method similar to that of Preparation Example 1, except that: Adjust the perovskite solution I in step (3) to an equal mass of distilled water; For the parts not listed, the same as in Preparation Example 1 was used to obtain color-changing isolation sand, which was named isolation sand D1.

[0070] Comparative Preparation Example 2 This comparative preparation example was prepared using a method similar to that of Preparation Example 1, except that: Step (1) is omitted; and the pretreated sand in step (2) of Preparation Example 1 is replaced with raw material sand I of equal mass. For the parts not listed, the same as in Preparation Example 1 was used to obtain color-changing isolation sand, which was named isolation sand D2.

[0071] Comparative preparation example 3 This comparative preparation example was prepared using a method similar to that of Preparation Example 1, except that: In step (3), while keeping the mass of the pretreated sand constant, the mass of the perovskite solution is adjusted to 50g; For the parts not listed, the same as in Preparation Example 1 was used to obtain color-changing isolation sand, which was named isolation sand D3.

[0072] In the following examples, unless otherwise specified, each part by weight = 10g.

[0073] Example 1 This embodiment illustrates the preparation of modified bitumen waterproof membrane according to the formulation in Table 2 and the following steps: (i) Add the base asphalt and rubber oil to a reactor preheated to 150°C, stir for 20 min, then add the modifier, tire rubber powder and acrylic resin, stir and keep warm at 180°C for 3 h; after all the asphalt has dispersed and swollen, add the filler and stir for 1 h to ensure that the filler is evenly dispersed to obtain the asphalt mixture. (ii) Immerse the material forming the carcass layer into the asphalt mixture and discharge it for shaping (scraping to a fixed thickness) to obtain intermediate material; (iii) At 130°C, one side of the intermediate material is covered with color-changing isolation sand, and after cooling, the other side is covered with an isolation film to obtain a modified bitumen waterproof membrane with a thickness of 3.0 mm.

[0074] Unless otherwise specified, Examples 2-3 were carried out using a similar method to Example 1, except for the formulation, as shown in Table 2; the parts not listed were the same as in Example 1, resulting in modified bitumen waterproof membrane.

[0075] Table 2

[0076] Example 4 This embodiment uses a similar method to that of embodiment 1, except that the isolation sand 1 in embodiment 1 is replaced with isolation sand 4. For any parts not listed, the process is the same as in Example 1, resulting in a modified bitumen waterproof membrane.

[0077] Example 5 This embodiment uses a similar method to that of Embodiment 1, except that the isolation sand 1 in Embodiment 1 is replaced with isolation sand 5. For any parts not listed, the process is the same as in Example 1, resulting in a modified bitumen waterproof membrane.

[0078] Example 6 This embodiment uses a method similar to that of Example 1, except that the type of acrylic resin is changed to acrylic resin-2; For any parts not listed, the process is the same as in Example 1, resulting in a modified bitumen waterproof membrane.

[0079] Comparative Example 1 This comparative example was conducted using a method similar to that of Example 1, except that the isolation sand 1 in Example 1 was replaced with raw material sand I. For any parts not listed, the process is the same as in Example 1, resulting in a modified bitumen waterproof membrane.

[0080] Comparative Example 2 This comparative example was conducted using a method similar to that of Example 1, except that the isolation sand 1 in Example 1 was replaced with raw material sand II. For any parts not listed, the process is the same as in Example 1, resulting in a modified bitumen waterproof membrane.

[0081] Comparative Example 3 This comparative example was conducted using a method similar to that of Example 1, except that the type of color-changing isolation sand was changed to isolation sand D1. For any parts not listed, the process is the same as in Example 1, resulting in a modified bitumen waterproof membrane.

[0082] Comparative Example 4 This comparative example was conducted using a method similar to that of Example 1, except that the type of color-changing isolation sand was changed to isolation sand D2. For any parts not listed, the process is the same as in Example 1, resulting in a modified bitumen waterproof membrane.

[0083] Comparative Example 5 This comparative example was conducted using a method similar to that of Example 1, except that the type of color-changing isolation sand was changed to isolation sand D3. For any parts not listed, the process is the same as in Example 1, resulting in a modified bitumen waterproof membrane.

[0084] Test case 1. Joint peel strength: Referring to the standard GB 18242-2008 "Elastomer SBS Modified Bituminous Waterproofing Membrane", samples were prepared and tested on the large areas of the modified bituminous waterproofing membranes prepared in the aforementioned examples; at the same time, the standard deviation of the test values ​​was calculated, and the results are shown in Table 3. 2. The mineral particle adhesion and mineral particle adhesion after 14 days of UV aging of the modified bitumen waterproof membranes prepared in the above examples were tested according to the method specified in GB 18242-2008. The results are shown in Table 3.

[0085] Table 3

[0086] The results above show that the color-changing isolation sand prepared by the method provided by the present invention has good application prospects in modified bitumen waterproof membranes. It can effectively improve the adhesion between the sand layer and the bitumen adhesive in the modified bitumen waterproof membrane, prevent sand loss and long-term aging resistance during later use, while reducing the difficulty of membrane overlap construction and improving the overlap strength and reliability of the membrane.

[0087] The preferred embodiments of the present invention have been described in detail above; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various technical features in any other suitable manner. These simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A method for preparing color-changing isolation sand, characterized in that, The method includes: (1) The raw sand is pretreated to obtain pretreated sand; (2) The pretreated sand is activated in an acidic solution containing a silane coupling agent to obtain activated sand; (3) The activated sand and perovskite solution are impregnated and heated in sequence to obtain discoloration isolation sand; The perovskite solution has a mass fraction of 10-20 wt%, and the mass ratio of the pretreated sand to the perovskite solution is 1:2-4.

2. The method according to claim 1, characterized in that, The raw material sand has an average particle diameter of 420-1500 μm and a specific surface area of ​​0.02-0.07 m². 2 / g; And / or, in step (2), the pH value of the acidic solution is 4-5; And / or, in step (2), the mass ratio of the pretreated sand to the silane coupling agent is 1:0.05-0.

2.

3. The method according to claim 1, characterized in that, In step (1), the pretreatment is carried out by plasma treatment, and the plasma treatment time is 0.5-5 min; And / or, in step (2), the activation treatment conditions include: a temperature of 50-60°C and a time of 1-3 hours; And / or, in step (3), the conditions for the impregnation treatment include: a temperature of 40-60°C and a time of 30-60 min; And / or, in step (3), the conditions for the heat treatment include: a temperature of 120-160°C and a holding time of 30-60 min.

4. The color-changing isolation sand prepared by the method according to any one of claims 1-3.

5. A modified bitumen waterproof membrane, characterized in that, The waterproof membrane comprises a color-changing isolation sand layer, modified bitumen coating I, a substrate layer, and modified bitumen coating II, which are stacked in sequence. The material forming the color-changing isolation sand layer is the color-changing isolation sand as described in claim 4.

6. The waterproof membrane according to claim 5, characterized in that, Based on the total mass of the asphalt mixture I forming the modified asphalt coating I, the asphalt mixture I contains 35-60 wt% base asphalt I, 3-8 wt% rubber oil I, 2-7 wt% modifier I, 0.5-3 wt% acrylic resin I, 6-18 wt% tire rubber powder I and 20-40 wt% filler I; And / or, based on the total mass of the asphalt mixture II forming the modified asphalt coating II, the asphalt mixture II contains 35-60 wt% base asphalt II, 3-8 wt% rubber oil II, 2-7 wt% modifier II, 0.5-3 wt% acrylic resin II, 6-18 wt% tire rubber powder II and 20-40 wt% filler II.

7. The waterproof membrane according to claim 6, characterized in that, Acrylic resin I and acrylic resin II each independently satisfy the following conditions: acid value of 6-20 mg KOH / g, glass transition temperature of 40-80℃, and softening point of 120-160℃.

8. The waterproof membrane according to claim 5 or 6, characterized in that, Modifier I and modifier II are each independently selected from at least one of styrene-butadiene-styrene triblock copolymer, styrene-butadiene rubber, hydrogenated styrene-butadiene block copolymer, and styrene-isoprene-styrene block copolymer; And / or, the filler I and the filler II are each independently selected from at least one of talc, superphosphate, montmorillonite, and kaolin; And / or, the material forming the carcass layer has a density of 180-310 g / m³ after being pre-impregnated with asphalt. 2 Polyester base material.

9. The waterproof membrane according to claim 5 or 6, characterized in that, The tire rubber powder I and the tire rubber powder II each independently meet the following requirements: average particle diameter of 175-500 μm and ash content of 8-15 wt%; And / or, the thickness of the modified bitumen waterproof membrane is 3.0-5.0 mm.

10. A method for preparing the modified bitumen waterproof membrane according to any one of claims 5-9, characterized in that, The method includes: S1. A modified asphalt coating I is provided on the lower surface of the carcass layer, and a modified asphalt coating II is provided on the upper surface of the carcass layer; S2. A color-changing isolation sand layer is provided on the side of the modified asphalt coating I that is not adhered to the body layer, thereby obtaining the modified asphalt waterproof membrane.

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