Preparation method of modified asphalt tire-free waterproof coiled material

Abstract

The invention discloses a preparation method of a modified asphalt tire-free waterproof coiled material, which is characterized by comprising the following steps: taking the following raw materials in percentage by mass: 41-43% of asphalt, 9-12% of softening oil, 10-11% of tire rubber powder, 1-3% of SBS (Styrene Butadiene Styrene), 3-4% of SBR (Styrene Butadiene Styrene), 1-2% of basalt fiber and 28-34% of filler, mixing and stirring the asphalt and the softening oil, heating to 190-195 DEG C, adding the tire rubber powder, heating to 190-195 DEG C, and stirring for 20-30 minutes, thereby obtaining the modified asphalt tire-free waterproof coiled material. Cooling to 185-190 DEG C, adding SBS and SBR, adding basalt fiber, carrying out heat preservation and stirring, adding a filler, and stirring and mixing to obtain an asphalt composition; and coating one surface of the film with the asphalt composition, and then covering a layer of film, thereby obtaining the modified asphalt tire-free waterproof coiled material. The prepared modified asphalt tire-free waterproof coiled material is good in performance and suitable for buildings to resist external rainwater erosion, prevent underground water leakage and the like.

Description

Technical Field

[0001] The present invention belongs to the preparation of waterproof materials, and relates to a method for preparing a modified asphalt tireless waterproofing roll. The modified asphalt tireless waterproofing roll prepared by the present invention is suitable for buildings to resist external rainwater erosion, prevent groundwater leakage, etc. Background Art

[0002] Waterproofing membranes are mainly used for building walls, roofs, tunnels, roads, landfills, etc., and can resist external rainwater erosion and prevent groundwater leakage. Asphalt-based waterproofing membranes have different classification methods according to different standards. According to the main component materials, they are divided into asphalt waterproofing membranes, polymer-modified asphalt waterproofing membranes and synthetic polymer waterproofing membranes; according to the different bases, they are divided into baseless membranes, paper base membranes, glass fiber base membranes, glass cloth base membranes and polyethylene base membranes.

[0003] Unlike tire-based waterproofing membranes, which can’t rely on tire bases to enhance their own strength, tireless waterproofing membranes mainly rely on tackifying resins for their bonding strength. When initially bonded, they have strong bonding properties and can be firmly bonded without the aid of heating equipment at temperatures above 5°C. They are safe, environmentally friendly, and convenient. They have excellent self-healing properties for fine cracks caused by external stresses, long-lasting bonding properties, and will not fall off or leak water when bonded to the base layer. The bonding at the lap joints has the same lifespan as the membrane, and they have a large elongation (elongation ≥ 450%). They have strong adaptability to shrinkage, deformation, and cracking of the base layer, and they will not flow at high temperatures and will not crack at low temperatures. They have a wide operating temperature range (high temperature 70°C, low temperature -20°C).

[0004] In the prior art, the tireless self-adhesive membrane mainly relies on the bonding strength of the asphalt rubber itself to attach to the building. Its preparation process is to prepare modified asphalt by hot-melt stirring and adding modifiers, and then one side is coated with PE (polyethylene) film, fine sand, mineral particles, etc. as the covering material, and the other side is generally covered with PET aluminum-plated silicone film, which is convenient for quick use during construction. However, the preparation process of existing tireless self-adhesive waterproof membranes is complicated, the process of adding modifiers is complicated, there are many processes, and the batching process takes a long time. In addition, it is highly sensitive to temperature and has weak mechanical strength. Compared with the strength of tire products, it is far from that of products with tires. It needs to be heated before construction, resulting in high energy consumption and a series of safety hazards.

[0005] In the prior art, CN113604064A discloses "A stabilizer application for improving the tearing performance of tireless waterproofing membranes". The modified asphalt self-adhesive material provided is composed of the following raw materials in percentage by mass: 35-60% asphalt, 5-20% cycloalkyl rubber oil, 2-15% SBS, 2-15% recycled butyl rubber, 1-7% terpene resin; 2-15% cement, 15-35% filler, 0.2-1.5% stabilizer; the reinforcing film is a composite film of polyethylene and polypropylene, and the isolation film is a PET aluminum-plated silicone oil film. However, the asphalt rubber used in this technical solution has a complicated preparation process, a complicated process for adding modifiers, many process flows, and a long batching process, which cannot well reflect the convenience and speed advantages of tireless waterproofing membranes.

[0006] Literature search revealed that there is no relevant literature report on the technical solution of using basalt fiber and basalt powder, two materials with the same composition but different properties, to compound modified asphalt and using phosphogypsum, a by-product produced during the production of phosphate fertilizers, as a filler for modified asphalt. Summary of the invention

[0007] The purpose of the present invention is to overcome the shortcomings of the prior art such as complex preparation process, more process flows, longer batching process time, and poor product performance, and to provide a method for preparing a modified asphalt tireless waterproof membrane having good product performance by compounding basalt fiber with basalt mineral powder (or / and phosphogypsum) to modify asphalt.

[0008] The present invention is a method for preparing a modified asphalt tireless waterproofing membrane, which is characterized by the following steps:

[0009] a. Preparation of asphalt composition:

[0010] (a) Ingredients: Take the raw materials of each component according to the mass percentage of asphalt 41%-43%, softening oil 9%-12%, tire rubber powder 10%-11%, SBS 1%-3%, SBR 3%-4%, basalt fiber 1%-2% and filler 28%-34%, the total of each component is 100%, and set aside;

[0011] (b) taking asphalt and softened oil, heating and melting them, mixing and stirring them, and raising the temperature to 190° C. to 195° C. while stirring;

[0012] (c) Maintaining the temperature at 190° C. to 195° C., (slowly) add tire rubber powder, stirring to prevent swelling and overflow, and stirring until the material is (completely) melted before proceeding to the next step;

[0013] (d) Lower the temperature to 185°C to 190°C, (slowly) add SBS and SBR, stir to avoid overflow caused by melt expansion, and stir until the materials are (completely) dissolved before proceeding to the next step;

[0014] (e) maintaining the temperature at 185° C. to 190° C., adding basalt fiber and then stirring at the same time;

[0015] (f) (slowly) adding filler, maintaining the temperature at 185° C. to 190° C., and stirring to obtain an asphalt composition;

[0016] b. Preparation of modified asphalt tireless waterproof membrane:

[0017] Take a film, apply the asphalt composition on one side of the film, and then cover the surface of the coated asphalt composition with another layer of film to obtain a modified asphalt tireless waterproof membrane; the thickness of the modified asphalt tireless waterproof membrane can be 1.2-1.5 mm or other required thickness.

[0018] When in use, the films on both sides of the prepared modified asphalt tireless waterproofing coiled material are peeled off, and the asphalt composition in the middle can be used to protect buildings from external rainwater erosion, prevent groundwater leakage, etc.

[0019] In the present invention: the filler in step a is one or a mixture of basalt powder and phosphogypsum powder;

[0020] The basalt powder is 100-200 mesh basalt powder produced and provided by Sichuan Tianrun Basalt Technology Co., Ltd., and the phosphogypsum powder is 100-200 mesh hemihydrate phosphogypsum powder produced and provided by Sichuan Longmang Phosphorus Chemical Industry Co., Ltd.

[0021] In the content of the present invention: the asphalt described in step a is preferably 70# oil produced in Iran, the softened oil is preferably a pour point -15°C engine oil produced and provided by Cangzhou Bohai Petrochemical Engineering Co., Ltd., and the tire rubber powder is preferably a 30-60 mesh tire rubber powder produced and provided by Dujiangyan Huayi Rubber Co., Ltd.

[0022] In the content of the present invention: the SBS described in step a is preferably a styrene thermoplastic elastomer modifier with a grade of T6302E produced and provided by Xi'an Zhongkai Yida Material Technology Co., Ltd. (SBS is the abbreviation of styrene thermoplastic elastomer modifier).

[0023] In the content of the present invention: the SBR described in step a is preferably a styrene-butadiene rubber modifier (SBR is the abbreviation of styrene-butadiene rubber modifier) ​​with an ash content of 40% produced and provided by Shandong Qiaolong Environmental Protection Technology Co., Ltd.

[0024] In the present invention, the basalt fiber in step a is preferably a basalt fiber with a length of 3 to 4 mm produced and provided by Sichuan Tianrun Basalt Technology Co., Ltd.

[0025] In the present invention, the stirring speed in step a(b) is preferably 200-300 r / min; the stirring speed in step a(c) is 600-700 r / min, and the stirring time is 120-150 min.

[0026] In the present invention, the stirring speed in step a(d) is preferably 600-700 r / min, and the stirring time is 75-90 min; the stirring speed in step a(e) is preferably 600-700 r / min, and the stirring time is 45-60 min; the stirring speed in step a(f) is preferably 600-700 r / min, and the stirring time is 45-90 min.

[0027] In the present invention, the film in step b can be a PE (PE, i.e. polyethylene) film, a PE reinforced film, a PET (PET, i.e. polyethylene terephthalate) aluminized film, a PET aluminized silicone film or other films currently available on the market.

[0028] Compared with the prior art, the present invention has the following characteristics and beneficial effects:

[0029] (1) By adopting the present invention, the tire rubber powder is evenly distributed in the asphalt and absorbs the light components to swell and form a network structure, thereby improving the adhesion of the asphalt composition and improving the air tightness, water resistance and heat resistance of the coil. At the same time, because it comes from the reuse of waste tires, the cost of production and environmental protection is reduced; SBS and SBR are mixed to obtain a hot melt tackifier, and SBS and SBR are evenly melted in the asphalt under high temperature stirring to form a network structure together, and the remaining modifiers are wrapped therein, thereby playing a role in toughening and viscosity enhancement, which can improve various basic properties while maintaining the adhesion of the coil, and at the same time simplify the preparation process and optimize the process conditions; (3-4 mm long short-cut) basalt fiber is directly added to the asphalt, evenly distributed in the asphalt under high temperature stirring, and physically combined with the asphalt through the surface adsorption of the fiber itself on the asphalt, forming a fiber network to fix the asphalt and the remaining modifiers, reducing the fluidity of the asphalt rubber, and making good use of the strength of the fiber itself to strengthen the tireless coil The mechanical strength of the material itself is improved, and the appropriate amount of fiber replaces part of the mineral powder, which optimizes the asphalt rubber preparation process, reduces the amount of raw materials used, and reduces the production cost; (100-200 mesh) basalt mineral powder is used as a filler. As a high-performance volcanic rock component, basalt is a special silicate that can be evenly distributed in the asphalt rubber through high-temperature stirring, so that the basalt mineral powder and the surface adsorption of asphalt are physically combined, and the excellent high temperature resistance, low temperature resistance, and chemical corrosion resistance of basalt are given to the asphalt rubber, thereby improving the high temperature stability, low temperature crack resistance, and fatigue resistance of the asphalt rubber; (100-200 mesh) phosphogypsum mineral powder is used as another filler. The purpose of using phosphogypsum as a filler is to solve the increasingly serious pollution problem and turn waste into treasure. In addition, phosphogypsum itself is easy to combine with asphalt to form a structural network, increase the cohesion of asphalt rubber, reduce asphalt deformation, and improve the tensile properties of modified asphalt, thereby improving the basic properties of modified asphalt;

[0030] (2) The modified asphalt tireless waterproofing membrane (product) prepared by the present invention is tested according to GB 23441-2009 and compared with the existing products. The elongation at break is ≥450%, which is 8% higher than the existing products; the nail rod tear strength is ≥60N; the heat resistance reaches 70°C, and there is no sliding for 2 hours; the low-temperature flexibility reaches -20°C, and there is no crack or break for 1 hour; the peeling strength between the membrane and the membrane is ≥1.0N / mm, and the peeling strength between the membrane and the aluminum plate is ≥1.5N / mm; the stickiness is ≥20min, and the oil permeability is ≤2 sheets; the thermal stability dimensional change rate is less than 1.8% of the existing products and less than 2.0% of the national standard. Its various performances are higher than the national standard; compared with the existing products, it has more outstanding performance in high temperature resistance and tensile strength;

[0031] (3) The product preparation process of the present invention is simple, the process is simple and efficient, and it is easy to operate. It effectively solves the problems of complex asphalt rubber preparation process, long batching time, and high raw material cost. The product has higher performance and better stability. At the same time, it reduces product ingredient consumption, reduces production costs, and improves the strength of tireless products. This allows the coiled material to still perform stably without a base for reinforcement, and is highly practical. DETAILED DESCRIPTION

[0032] The following embodiments are intended to further illustrate the present invention, but should not be construed as limiting the scope of protection of the present invention. Some non-essential improvements and adjustments made to the present invention by technicians in this field based on the above-mentioned contents of the present invention still fall within the scope of protection of the present invention.

[0033] Embodiment 1:

[0034] A method for preparing a modified asphalt tireless waterproofing membrane comprises the following steps:

[0035] a. Preparation of asphalt composition:

[0036] (a) Ingredients: Take the raw materials of each component according to the mass percentage of asphalt 42.2%, softening oil 11.7%, 60 mesh tire rubber powder 10.6%, SBS 1.7%, SBR 3.0%, basalt fiber 1.1% and filler basalt mineral powder 29.7%, weigh a total of 600g of raw materials and set aside;

[0037] (b) taking asphalt and melting it at 140°C, adding softened oil and mixing and stirring at a stirring speed of 300 r / min, and raising the temperature to 195°C while stirring;

[0038] (c) maintaining the temperature at 195°C, slowly adding tire rubber powder and stirring at a speed of 700 r / min for 120 min;

[0039] (d) lowering the temperature to 185°C, slowly adding SBS and SBR, and stirring at 600 r / min for 90 min;

[0040] (e) raising the temperature to 190°C, adding basalt fiber and stirring at a speed of 700 r / min for 60 min;

[0041] (f) slowly adding filler basalt powder, maintaining the temperature at 190° C., stirring at a speed of 600 r / min for 60 min, and obtaining an asphalt composition after stirring;

[0042] b. Preparation of modified asphalt tireless waterproof membrane:

[0043] Take a film, apply the asphalt composition on one side of the film, and then cover the surface of the coated asphalt composition with another layer of film to obtain a modified asphalt tireless waterproof membrane; the thickness of the modified asphalt tireless waterproof membrane is 1.2 to 1.5 mm for subsequent testing.

[0044] Embodiment 2:

[0045] A method for preparing a modified asphalt tireless waterproofing membrane comprises the following steps:

[0046] a. Preparation of asphalt composition:

[0047] (a) Ingredients: Take the raw materials of each component according to the mass percentage of asphalt 41.5%, softening oil 9.4%, 60 mesh tire rubber powder 10.4%, SBS 2.1%, SBR 3.3%, basalt fiber 2% and filler phosphogypsum powder 31.3%, weigh a total of 600g of raw materials and set aside;

[0048] (b) taking asphalt and melting it at 140°C, adding softened oil and mixing and stirring at a stirring speed of 300 r / min, and raising the temperature to 195°C while stirring;

[0049] (c) maintaining the temperature at 195°C, slowly adding tire rubber powder and stirring at a speed of 700 r / min for 150 min;

[0050] (d) lowering the temperature to 190°C, slowly adding SBS and SBR, and stirring at 700 r / min for 90 min;

[0051] (e) raising the temperature to 190°C, adding basalt fiber and stirring at a speed of 700 r / min for 60 min;

[0052] (f) slowly adding filler phosphogypsum powder, maintaining the temperature at 190° C., stirring at a speed of 600 r / min for 80 min, and obtaining an asphalt composition after stirring;

[0053] b. Preparation of modified asphalt tireless waterproof membrane:

[0054] Take a film, apply the asphalt composition on one side of the film, and then cover the surface of the coated asphalt composition with another layer of film to obtain a modified asphalt tireless waterproof membrane; the thickness of the modified asphalt tireless waterproof membrane is 1.2 to 1.5 mm for subsequent testing.

[0055] Embodiment 3:

[0056] A method for preparing a modified asphalt tireless waterproofing membrane comprises the following steps:

[0057] a. Preparation of asphalt composition:

[0058] (a) Ingredients: Take the raw materials of each component according to the mass percentage of asphalt 42.8%, softening oil 11.8%, 60 mesh tire rubber powder 10.7%, SBS 1.7%, SBR 3.0%, basalt fiber 1% and filler basalt mineral powder 29%, weigh a total of 600g of raw materials and set aside;

[0059] (b) taking asphalt and melting it at 140°C, adding softened oil and mixing and stirring at a stirring speed of 300 r / min, and raising the temperature to 195°C while stirring;

[0060] (c) maintaining the temperature at 195°C, slowly adding tire rubber powder and stirring at a speed of 700 r / min for 120 min;

[0061] (d) lowering the temperature to 185°C, slowly adding SBS and SBR, and stirring at 600 r / min for 90 min;

[0062] (e) raising the temperature to 190°C, adding basalt fiber and stirring at a speed of 700 r / min for 60 min;

[0063] (f) slowly adding filler basalt powder, maintaining the temperature at 190° C., stirring at a speed of 600 r / min for 90 min, and obtaining an asphalt composition after stirring;

[0064] b. Preparation of modified asphalt tireless waterproof membrane:

[0065] Take a film, apply the asphalt composition on one side of the film, and then cover the surface of the coated asphalt composition with another layer of film to obtain a modified asphalt tireless waterproof membrane; the thickness of the modified asphalt tireless waterproof membrane is 1.2 to 1.5 mm for subsequent testing.

[0066] In the above-mentioned embodiments 1-3:

[0067] The basalt powder in step a is 200 mesh basalt powder produced and provided by Sichuan Tianrun Basalt Technology Co., Ltd., and the phosphogypsum powder is 200 mesh hemihydrate phosphogypsum powder produced and provided by Sichuan Longmang Phosphorus Chemical Industry Co., Ltd.;

[0068] The asphalt in step a is 70# oil produced in Iran, the softened oil is a pour point -15°C engine oil produced and provided by Cangzhou Bohai Petrochemical Engineering Co., Ltd., and the tire rubber powder is a 60-mesh tire rubber powder produced and provided by Dujiangyan Huayi Rubber Co., Ltd.;

[0069] The SBS described in step a is a styrene thermoplastic elastomer modifier with a grade of T6302E produced and provided by Xi'an Zhongkai Yida Material Technology Co., Ltd. (SBS is the abbreviation of styrene thermoplastic elastomer modifier);

[0070] The SBR described in step a is a styrene-butadiene rubber modifier (SBR is the abbreviation of styrene-butadiene rubber modifier) ​​with an ash content of 40% produced and provided by Shandong Qiaolong Environmental Protection Technology Co., Ltd.;

[0071] The basalt fiber described in step a is a basalt fiber with a length of 3 to 4 mm produced and provided by Sichuan Tianrun Basalt Technology Co., Ltd.

[0072] The performance of the modified asphalt tireless waterproof membrane samples prepared in Examples 1 to 3 was tested, and the results are shown in Table 1 below; the testing method was carried out in accordance with the method disclosed in GB 23441-2009 "Self-adhesive polymer modified asphalt waterproof membrane".

[0073] Table 1:

[0074]

[0075]

[0076] It can be seen from the test results in Table 1 above that the modified asphalt tireless waterproof membrane products obtained in Examples 1-3 of the present invention not only meet the national standards in various performances, but also significantly exceed the national standards in terms of elongation, heat resistance, peel strength and thermal stability. Compared with the existing tireless products, the elongation and thermal stability have outstanding performances, and the other properties also have good performances. Basalt mineral powder and phosphogypsum mineral powder are used as fillers to make the various performance indicators of the modified asphalt waterproof membrane far exceed the various performance indicators of the waterproof membrane prepared with talcum powder as the filler commonly used in existing products.

[0077] Embodiment 4:

[0078] A method for preparing a modified asphalt tireless waterproofing membrane comprises the following steps:

[0079] a. Preparation of asphalt composition:

[0080] (a) Ingredients: Take the raw materials of each component according to the mass percentage of asphalt 42%, softening oil 10%, tire rubber powder 10%, SBS 2%, SBR 4%, basalt fiber 1.5% and filler 30.5% and set aside;

[0081] (b) taking asphalt and softened oil, heating and melting them, mixing and stirring them, and raising the temperature to 192° C. while stirring;

[0082] (c) Maintaining the temperature at 192°C, (slowly) add tire rubber powder, stirring to prevent swelling and overflow, and stirring until the material is (completely) melted before proceeding to the next step;

[0083] (d) Lower the temperature to 188°C, add SBS and SBR (slowly), stir to avoid overflow caused by melt expansion, and stir until the materials are (completely) dissolved before proceeding to the next step;

[0084] (e) maintaining the temperature at 188° C., adding basalt fiber and then stirring;

[0085] (f) (slowly) adding filler, maintaining the temperature at 188° C., and stirring to obtain an asphalt composition;

[0086] b. Preparation of modified asphalt tireless waterproof membrane:

[0087] Take a film, apply the asphalt composition on one side of the film, and then cover the surface of the coated asphalt composition with another layer of film to obtain a modified asphalt tireless waterproof membrane; the thickness of the modified asphalt tireless waterproof membrane can be 1.2-1.5 mm or other required thickness.

[0088] Embodiment 5:

[0089] A method for preparing a modified asphalt tireless waterproofing membrane comprises the following steps:

[0090] a. Preparation of asphalt composition:

[0091] (a) Ingredients: Take the raw materials of each component according to the mass percentage of asphalt 42%, softening oil 12%, tire rubber powder 10%, SBS 3%, SBR 3%, basalt fiber 2% and filler 28% and set aside;

[0092] (b) taking asphalt and softened oil, heating and melting them, mixing and stirring them at a stirring speed of 200 r / min, and raising the temperature to 190° C. while stirring;

[0093] (c) maintaining the temperature at 190° C., (slowly) adding tire rubber powder, stirring to avoid overflow due to swelling, at a stirring speed of 600 r / min and a stirring time of 150 min;

[0094] (d) Lower the temperature to 185°C, add SBS and SBR (slowly), and stir to avoid overflow due to melt expansion. The stirring speed is 600 r / min and the stirring time is 90 min.

[0095] (e) maintaining the temperature at 185° C., adding basalt fiber and stirring at a stirring speed of 600 r / min for 60 min;

[0096] (f) (slowly) adding filler, maintaining the temperature at 185° C. with stirring, the stirring speed is 600 r / min, the stirring time is 90 min, and the asphalt composition is obtained after stirring;

[0097] b. Preparation of modified asphalt tireless waterproof membrane:

[0098] Take a film, apply the asphalt composition on one side of the film, and then cover the surface of the coated asphalt composition with another layer of film to obtain a modified asphalt tireless waterproof membrane; the thickness of the modified asphalt tireless waterproof membrane can be 1.2-1.5 mm or other required thickness.

[0099] Embodiment 6:

[0100] A method for preparing a modified asphalt tireless waterproofing membrane comprises the following steps:

[0101] a. Preparation of asphalt composition:

[0102] (a) Ingredients: Take the raw materials of each component according to the mass percentage of asphalt 41%, softening oil 9%, tire rubber powder 10%, SBS 1%, SBR 4%, basalt fiber 1% and filler 34% and set aside;

[0103] (b) taking asphalt and softened oil, heating and melting them, mixing and stirring them at a stirring speed of 300 r / min, and raising the temperature to 195° C. while stirring;

[0104] (c) Maintaining the temperature at 195°C, (slowly) add tire rubber powder and stir to avoid overflow due to melting expansion. The stirring speed is 700 r / min and the stirring time is 120;

[0105] (d) lowering the temperature to 190°C, (slowly) adding SBS and SBR, stirring to avoid overflow due to melt expansion, at a stirring speed of 700 r / min and a stirring time of 75 min;

[0106] (e) maintaining the temperature at 190° C., adding basalt fiber and stirring at a stirring speed of 700 r / min for 45 min;

[0107] (f) (slowly) adding filler, maintaining the temperature at 190° C. with stirring, the stirring speed is 700 r / min, the stirring time is 45 min, and the asphalt composition is obtained after stirring;

[0108] b. Preparation of modified asphalt tireless waterproof membrane:

[0109] Take a film, apply the asphalt composition on one side of the film, and then cover the surface of the coated asphalt composition with another layer of film to obtain a modified asphalt tireless waterproof membrane; the thickness of the modified asphalt tireless waterproof membrane can be 1.2-1.5 mm or other required thickness.

[0110] Embodiment 7:

[0111] A method for preparing a modified asphalt tireless waterproofing membrane comprises the following steps:

[0112] a. Preparation of asphalt composition:

[0113] (a) Ingredients: Take the raw materials of each component according to the mass percentage of asphalt 42%, softening oil 9.5%, tire rubber powder 10.5%, SBS 2%, SBR 3.5%, basalt fiber 1.5% and filler 31% and set aside;

[0114] (b) taking asphalt and softened oil, heating and melting them, mixing and stirring them at a stirring speed of 250 r / min, and raising the temperature to 192° C. while stirring;

[0115] (c) maintaining the temperature at 192°C, (slowly) adding tire rubber powder, stirring to prevent overflow due to swelling, at a stirring speed of 650 r / min, for 130 min;

[0116] (d) lowering the temperature to 187°C, (slowly) adding SBS and SBR, stirring to avoid overflow due to melt expansion, at a stirring speed of 650 r / min, and a stirring time of 86 min;

[0117] (e) maintaining the temperature at 187° C., adding basalt fiber and stirring at a speed of 650 r / min for 55 min;

[0118] (f) (slowly) adding filler, maintaining the temperature at 187° C. and stirring at a speed of 650 r / min for 62 min to obtain an asphalt composition;

[0119] b. Preparation of modified asphalt tireless waterproof membrane:

[0120] Take a film, apply the asphalt composition on one side of the film, and then cover the surface of the coated asphalt composition with another layer of film to obtain a modified asphalt tireless waterproof membrane; the thickness of the modified asphalt tireless waterproof membrane can be 1.2-1.5 mm or other required thickness.

[0121] In the above-mentioned embodiments 4-7:

[0122] The filler described in step a is one or a mixture of basalt powder and phosphogypsum powder; the basalt powder is 100-200 mesh basalt powder produced and provided by Sichuan Tianrun Basalt Technology Co., Ltd., and the phosphogypsum powder is 100-200 mesh hemihydrate phosphogypsum powder produced and provided by Sichuan Longmang Phosphorus Chemical Co., Ltd.;

[0123] The asphalt in step a is 70# oil produced in Iran, the softened oil is a pour point -15°C engine oil produced and provided by Cangzhou Bohai Petrochemical Engineering Co., Ltd., and the tire rubber powder is a 30-60 mesh tire rubber powder produced and provided by Dujiangyan Huayi Rubber Co., Ltd.;

[0124] The SBS described in step a is a styrene thermoplastic elastomer modifier with a grade of T6302E produced and provided by Xi'an Zhongkai Yida Material Technology Co., Ltd. (SBS is the abbreviation of styrene thermoplastic elastomer modifier);

[0125] The SBR described in step a is a styrene-butadiene rubber modifier (SBR is the abbreviation of styrene-butadiene rubber modifier) ​​with an ash content of 40% produced and provided by Shandong Qiaolong Environmental Protection Technology Co., Ltd.;

[0126] The basalt fiber described in step a is a basalt fiber with a length of 3 to 4 mm produced and provided by Sichuan Tianrun Basalt Technology Co., Ltd.

[0127] In the above embodiments 1-7: the film in step b can be a PE (PE is polyethylene) film, a PE reinforced film, a PET (PET is polyethylene terephthalate) aluminized film, a PET aluminized silicone oil film or other films currently available on the market.

[0128] In the above embodiments: all the raw materials used are commercially available products.

[0129] In the above embodiments: the percentages used, unless otherwise specified, are all mass (weight) percentages or percentages known to those skilled in the art; the mass (weight) parts may be grams or kilograms.

[0130] In the above embodiments, the process parameters (temperature, time, speed, etc.) in each step and the numerical values ​​of the amounts of each component are ranges, and any point can be applied.

[0131] The content of the present invention and the technical content not specifically described in the above embodiments are the same as the prior art.

[0132] The present invention is not limited to the above embodiments, and all of the contents of the present invention can be implemented and have the above good effects.

Claims

1. A method for preparing a modified asphalt tireless waterproofing membrane, The method is characterized in that the steps are: a. Preparation of asphalt composition: (a) Ingredients: Take the raw materials of each component according to the mass percentage of asphalt 41%-43%, softening oil 9%-12%, tire rubber powder 10%-11%, SBS 1%-3%, SBR 3%-4%, basalt fiber 1%-2% and filler 28%-34%, the total of each component is 100%, and set aside; (b) taking asphalt and softened oil, heating and melting them, mixing and stirring them, and raising the temperature to 190°C to 195°C while stirring; (c) Maintaining the temperature at 190°C to 195°C, adding tire rubber powder, stirring until the material is melted, and then proceeding to the next step; (d) Lower the temperature to 185°C to 190°C, add SBS and SBR, stir until the materials are dissolved and proceed to the next step; (e) maintaining the temperature at 185°C to 190°C, adding basalt fiber and stirring at the same time; (f) adding filler, maintaining the temperature at 185° C. to 190° C., and stirring to obtain an asphalt composition; b. Preparation of modified asphalt tireless waterproof membrane: Take a film, apply the asphalt composition on one side of the film, and then cover the surface of the applied asphalt composition with another layer of film to obtain the modified asphalt tireless waterproofing membrane.

2. The method for preparing the modified asphalt tireless waterproofing membrane according to claim 1, characterized in that: The filler described in step a is one or a mixture of basalt powder and phosphogypsum powder.

3. The method for preparing the modified asphalt tireless waterproofing membrane according to claim 2, characterized in that: The basalt powder is 100-200 mesh basalt powder produced and provided by Sichuan Tianrun Basalt Technology Co., Ltd., and the phosphogypsum powder is 100-200 mesh hemihydrate phosphogypsum powder produced and provided by Sichuan Longmang Phosphorus Chemical Industry Co., Ltd.

4. The method for preparing the modified asphalt tireless waterproofing membrane according to claim 1, 2 or 3, characterized in that: The asphalt described in step a is 70# oil produced in Iran, the softened oil is a pour point -15°C engine oil produced and provided by Cangzhou Bohai Petrochemical Engineering Co., Ltd., and the tire rubber powder is a 30-60 mesh tire rubber powder produced and provided by Dujiangyan Huayi Rubber Co., Ltd.

5. The method for preparing the modified asphalt tireless waterproofing membrane according to claim 1, 2 or 3, characterized in that: The SBS described in step a is a styrene thermoplastic elastomer modifier with a grade of T6302E produced and provided by Xi'an Zhongkai Yida Material Technology Co., Ltd.

6. The method for preparing the modified asphalt tireless waterproofing membrane according to claim 1, 2 or 3, characterized in that: The SBR described in step a is a styrene-butadiene rubber modifier with an ash content of 40% produced and provided by Shandong Qiaolong Environmental Protection Technology Co., Ltd.

7. The method for preparing the modified asphalt tireless waterproofing membrane according to claim 1, 2 or 3, characterized in that: The basalt fiber described in step a is a basalt fiber with a length of 3 to 4 mm produced and provided by Sichuan Tianrun Basalt Technology Co., Ltd.

8. The method for preparing the modified asphalt tireless waterproofing membrane according to claim 1, 2 or 3, characterized in that: The stirring speed in step a (b) is 200-300 r / min; the stirring speed in step a (c) is 600-700 r / min, and the stirring time is 120-150 min.

9. The method for preparing the modified asphalt tireless waterproofing membrane according to claim 1, 2 or 3, characterized in that: Step a The stirring speed in step (d) is 600-700 r / min, and the stirring time is 75-90 min; the stirring speed in step a (e) is 600-700 r / min, and the stirring time is 45-60 min; the stirring speed in step a (f) is 600-700 r / min, and the stirring time is 45-90 min.

10. The method for preparing the modified asphalt tireless waterproofing membrane according to claim 1, 2 or 3, characterized in that: The film in step b is a PE film, a PE reinforced film, a PET aluminized film, a PET aluminized silicone film or other films currently available on the market.

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