Mineral asphalt processing technology, waterproof coiled material and application

Abstract

The invention provides a mineral asphalt processing technology, a waterproof coiled material and application, and relates to the field of modified asphalt waterproof coiled materials, the mineral asphalt processing technology comprises the following steps: crushing, mixing, screening and drying mineral asphalt to obtain a finished product EP; the mixing step comprises the steps of adding an isolation material into the intermediate obtained in the crushing step to obtain a primary mixture, and adding the isolation material again to obtain a secondary mixture; the isolation materials comprise one or more of hard asphalt, filler and rubber powder. The mineral asphalt processing technology disclosed by the invention is low in comprehensive cost and excellent in performance, and the waterproof coiled material with excellent aging resistance can be prepared.

Description

Technical Field

[0001] The invention relates to the field of modified asphalt waterproofing coiled materials, and in particular to a mineral asphalt processing technology, a waterproofing coiled material and applications. Background Art

[0002] Modified asphalt waterproofing membrane is a waterproofing material with asphalt as the main body, and plays an important role in civil, industrial and waterproof construction. Its durability has been the focus of research in recent years. Mineral asphalt is a natural rock asphalt with abundant output. It has extremely high application value due to its excellent cost performance. Because its raw ore asphalt content is about 25%, the highest water content is more than 10% and is unstable. It presents uneven hard blocks in the natural state, which is difficult to process and inefficient. The current processing technology cost is high, so its application is limited. It is currently only widely used in the road field and rarely used in other fields. Because it does not contain wax and has extremely high durability and stability, it can be used in waterproofing membranes to improve high temperature stability and durability, and its raw ore price is cheap, which can generate economic benefits.

[0003] Related prior art such as patent CN115849766A discloses a processing technology for mixing hot recycled asphalt with a regeneration agent in a factory, comprising the following steps: step 1, milling the damaged part of the asphalt mixture surface layer, and obtaining RAP old material by crushing and screening; step 2, configuring asphalt raw materials, aggregates, fillers and regeneration agents according to the mixture; step 3, mixing RAP old material with the regeneration agent to obtain a first mixture; step 4, adding the preheated aggregate to the first mixture, heating, mixing and stirring to obtain a second mixture; step 5, adding fillers and asphalt raw materials to the second mixture, heating, mixing and stirring to obtain a heated recycled asphalt mixture; step 6, heat-insulating and compacting the asphalt mixture in a temperature range of 140 to 145°C to obtain a finished asphalt mixture; the invention recycles and reuses waste pavement materials, which can avoid the occupation of land and pollution to the environment caused by the stacking of waste materials.

[0004] For example, patent CN116285398A discloses an environmentally friendly exposed type covering material and an environmentally friendly exposed type modified asphalt waterproofing membrane and a preparation method. The environmentally friendly exposed type covering material is taken from the recycled asphalt stone produced by the asphalt roadbed maintenance, and is made by itself through the processes of primary crushing, screening, secondary crushing, screening, grading, stirring, etc. The environmentally friendly exposed type modified asphalt waterproofing membrane made from the environmentally friendly exposed type covering material has more reliable adhesion between mineral granules and modified asphalt, excellent puncture resistance, and can effectively resist ultraviolet aging and water erosion peeling. It is a new type that can replace the existing mineral granule surface membrane for exposed waterproofing materials.

[0005] So far, there is a lack of reference technology for the processing of mineral asphalt, and the performance of related products produced by existing processes still has room for further improvement. In view of the problems existing in the existing technology, it is very necessary to find a mineral asphalt processing technology, waterproof membrane and application. Summary of the invention

[0006] In view of the problems existing in the prior art, the present invention provides a mineral asphalt processing technology, a waterproofing coiled material and applications. The mineral asphalt processing technology has low comprehensive cost and excellent performance, and can produce a waterproofing coiled material with excellent aging resistance.

[0007] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0008] The present invention provides a processing technology for mineral asphalt, comprising the following steps: crushing, blending, screening and drying the mineral asphalt to obtain a finished product EP;

[0009] The blending includes adding the isolation material A to the intermediate obtained in the crushing step (i.e., primary blending) to obtain a primary mixture, and adding the isolation material B again (i.e., secondary blending) to obtain a secondary mixture;

[0010] The isolation material A and the isolation material B both include one or more of hard asphalt, filler and rubber powder.

[0011] Further, the crushing includes two or more crushing steps;

[0012] Preferably, the crushing includes a first crushing, a second crushing and a third crushing; the particle size of the first crushing is ≤500mm, the particle size of the second crushing is ≤200mm, and the particle size of the third crushing is ≤20mm.

[0013] Furthermore, the moisture content of the intermediate obtained after the third crushing is 13-15%.

[0014] Furthermore, the particle size of the primary mixture is 10-20 mm, and the moisture content is ≤10%, and the particle size of the secondary mixture is 10-20 mesh, and the moisture content is ≤7%.

[0015] Preferably, the particle size of the primary mixture is 15 mm, and the particle size of the secondary mixture is 15 mesh.

[0016] Furthermore, the isolation material A accounts for 20-30% of the total weight of the intermediate and the isolation material A; the intermediate accounts for 40-50% of the total weight of the intermediate, the isolation material A and the isolation material B.

[0017] Preferably, the insulating material A accounts for 25% of the total weight of the intermediate and the insulating material A; the intermediate accounts for 45% of the total weight of the intermediate, the insulating material A and the insulating material B.

[0018] Furthermore, the filler includes one or more of talc, fly ash and light calcium, and the rubber powder includes modified powder.

[0019] Preferably, the isolation material A comprises modified powder, and the isolation material B comprises hard asphalt and / or filler.

[0020] Furthermore, the modified powder comprises waste rubber powder, and the particle size of the modified powder is ≤40 mesh, preferably ≤60 mesh, and more preferably 100 mesh.

[0021] In some specific embodiments, the isolation material A is hard asphalt, light calcium and waste rubber powder, and the isolation material B is light calcium and waste rubber powder.

[0022] In some specific embodiments, the isolation material A is light calcium and waste rubber powder, and the isolation material B is hard asphalt, light calcium and waste rubber powder.

[0023] Furthermore, the screening includes screening the secondary mixture to obtain a semi-finished product; the particle size of the semi-finished product is ≤100 mesh and the moisture content is ≤5%.

[0024] Preferably, the particle size of the semi-finished product is 100 mesh.

[0025] Further, the drying includes two or more drying steps;

[0026] Preferably, it includes primary drying and secondary drying, and the moisture content of the product after the primary drying is ≤3.5%.

[0027] Furthermore, the particle size of the finished EP is ≤100 mesh and the moisture content is ≤2%.

[0028] Preferably, the particle size of the finished EP is 100 mesh.

[0029] It is worth noting that the mineral asphalt used in the present invention is an asphalt-like substance generated by the combined effects of heat, pressure, oxidation, catalyst, bacteria, etc. after hundreds of millions of years of deposition and change of petroleum; preferably, the mineral asphalt is formed into fine particles after excavation, crushing and grinding, and is light brown in color. Generally, the asphalt content is between 20% and 30%, and the rest is limestone minerals. The mineral asphalt described in the present invention is hard and uneven in its natural state, with a maximum moisture content of ≥10%, and is easy to stick together after being crushed. The mineral asphalt has stability, oxidation resistance, weather resistance, strong resistance to microbial corrosion, and good compatibility with the base asphalt in the petroleum-based chemical structure, overcoming the segregation problem of polymer modifiers such as SBS. In the production process of this processing technology, the asphalt content of mineral asphalt and the isolation material will undergo grinding and swelling at a certain temperature, which is a key step in improving the performance of the coiled product.

[0030] Furthermore, the finished product EP prepared by the above-mentioned processing technology provided by the present invention can be used to prepare waterproof membrane.

[0031] Furthermore, the present invention provides a waterproof roll material, including an upper covering isolation layer, an upper surface modified asphalt coating layer, an intermediate reinforcement layer, a lower surface modified asphalt coating layer and a lower covering isolation layer; the upper surface modified asphalt coating layer and the lower surface modified asphalt coating layer both include the finished product EP produced by the above-mentioned processing technology.

[0032] Furthermore, the preparation methods of the upper surface modified asphalt coating layer and the lower surface modified asphalt coating layer both include the following steps:

[0033] After heating the asphalt, mix it with the star-shaped SBS, continue heating and homogenize to obtain a Y0 mixture; mix and stir the Y0 mixture, the finished EP and the stabilizer to obtain a Y1 mixture; mix and stir the Y1 mixture and the filler to obtain a modified asphalt coating material.

[0034] In some specific embodiments, the preparation methods of the upper surface modified asphalt coating layer and the lower surface modified asphalt coating layer both include the following steps:

[0035] Heat 90# asphalt and 200# asphalt to 160-165℃, then homogenize the heated asphalt and star-shaped SBS at 185-195℃ for 1.5h to obtain Y0 mixture; add the finished EP and stabilizer to the Y0 mixture at 180-190℃ and mix and stir for 60min to obtain Y1 mixture; mix and stir the Y1 mixture and 200-mesh filler for 50min to obtain modified asphalt coating.

[0036] Preferably, the star-shaped SBS is Li Changrong star-shaped SBS4402, the stabilizer is light stabilizer 2020, and the filler is light calcium.

[0037] In some specific embodiments, the method for preparing the waterproof coiled material comprises the following steps:

[0038] S1: coating an upper surface modified asphalt coating layer and a lower surface modified asphalt coating layer on the upper and lower surfaces of the middle reinforcement layer respectively, and obtaining a modified asphalt reinforcement layer after cooling;

[0039] S2: Covering the upper surface of the modified asphalt reinforcement layer with an upper surface insulating layer; subjecting the lower surface of the modified asphalt reinforcement layer to water absorption and drying treatment, and covering the material of the lower surface insulating layer with the lower surface insulating layer with the modified asphalt reinforcement layer to obtain a coil precursor;

[0040] S3: The coil precursor is sequentially subjected to roller cooling and shaping, conveying and packaging machine winding and cutting processes to obtain a waterproof coil.

[0041] The technical effects achieved by the present invention are:

[0042] 1. Based on the characteristics of mineral asphalt itself, the process of the present invention solves the problem that mineral asphalt has high moisture content and is non-uniform and difficult to process, ensuring that the technical indicators of the finished product meet the requirements and have good stability;

[0043] 2. The process of the present invention solves the problem of easy adhesion and low efficiency of finished products during storage, solves the safety risks, and improves the comprehensive efficiency of waterproof membrane production and product application performance;

[0044] 3. The process of the present invention is cheaper than the existing process equipment, has improved production efficiency, low energy consumption, and reduced overall cost;

[0045] 4. In the present invention, the two blendings, on the one hand, physically reduce the moisture content, eliminate the need for drying equipment, and save energy in the drying process; on the other hand, they solve the contradiction between increasing the proportion of mineral asphalt in the blending ratio and the difficulty in reaching a proportion of 45% due to easy adhesion in one blending, making the blending ratio more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 A mineral asphalt processing process roadmap provided by the present invention;

[0047] Figure 2 A schematic structural diagram of a waterproof roll provided by the present invention;

[0048] Among them, 1-upper surface isolation layer; 2-upper surface modified asphalt coating layer; 3-middle reinforcement layer; 4-lower surface modified asphalt coating layer; 5-lower surface isolation layer. DETAILED DESCRIPTION

[0049] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0050] Before further describing the specific embodiments of the present invention, it should be understood that the scope of protection of the present invention is not limited to the specific embodiments described below; it should also be understood that the terms used in the examples of the present invention are for describing specific embodiments rather than for limiting the scope of protection of the present invention.

[0051] When the embodiment gives a numerical range, it should be understood that, unless otherwise specified in the present invention, the two endpoints of each numerical range and any numerical value between the two endpoints can be selected. Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those of ordinary skill in the art to which the present invention belongs.

[0052] It is worth noting that the mineral asphalt used in the present invention is selected from Indonesian rock asphalt, the waste rubber powder is purchased from Tangshan Gaoneng Jiejia New Material Technology Co., Ltd. (particle size is 100 mesh), and the light calcium is purchased from Zibo Hainuo Chemical Co., Ltd., and the remaining raw materials are common commercial products, so there is no specific limitation on their sources.

[0053] The mineral asphalt processing process provided by the present invention is shown in Figure 1 ; A schematic diagram of the structure of a waterproof membrane is shown in Figure 2 .

[0054] Example 1

[0055] A processing technology for mineral asphalt, specifically comprising the following steps:

[0056] (1) Crushing: The mineral asphalt is crushed for the first time to obtain a mineral asphalt with a particle size of 500 mm, and then crushed for the second time to obtain a mineral asphalt with a particle size of 200 mm. Then, the mineral asphalt is crushed for the third time to obtain an intermediate with a particle size of 20 mm. The moisture content of the intermediate is 13-15%;

[0057] (2) Blending: adding insulating material A to the intermediate (the amount of insulating material A added accounts for 25% of the total weight of the intermediate and insulating material A) to obtain a primary mixture (particle size of 15 mm, moisture content ≤ 10%), and then adding insulating material B again (the amount of the intermediate added accounts for 45% of the total weight of the intermediate, insulating material A and insulating material B) to obtain a secondary mixture (particle size of 15 mesh, moisture content ≤ 7%);

[0058] (3) Screening: Screening the secondary mixture to obtain a semi-finished product (particle size of 100 mesh, moisture content ≤5%);

[0059] (4) Drying: The semi-finished product is dried once to obtain a product with a moisture content of ≤3.5%, and then dried twice to obtain a finished product EP (moisture content ≤2%).

[0060] Example 2

[0061] (1) Crushing: The mineral asphalt is crushed for the first time to obtain a mineral asphalt with a particle size of 500 mm, and then crushed for the second time to obtain a mineral asphalt with a particle size of 200 mm. Then, the mineral asphalt is crushed for the third time to obtain an intermediate with a particle size of 20 mm. The moisture content of the intermediate is 13-15%;

[0062] (2) Blending: adding insulating material A to the intermediate (the amount of insulating material A added accounts for 30% of the total weight of the intermediate and insulating material A) to obtain a primary mixture (particle size of 20 mm, moisture content ≤ 10%), and then adding insulating material B again (the amount of the intermediate added accounts for 50% of the total weight of the intermediate, insulating material A and insulating material B) to obtain a secondary mixture (particle size of 20 mesh, moisture content ≤ 7%);

[0063] (3) Screening: Screening the secondary mixture to obtain a semi-finished product (particle size of 100 mesh, moisture content ≤5%);

[0064] (4) Drying: The semi-finished product is dried once to obtain a product with a moisture content of ≤3.5%, and then dried twice to obtain a finished product EP (moisture content ≤2%).

[0065] Example 3

[0066] A processing technology for mineral asphalt, specifically comprising the following steps:

[0067] (1) Crushing: The mineral asphalt is crushed for the first time to obtain a mineral asphalt with a particle size of 500 mm, and then crushed for the second time to obtain a mineral asphalt with a particle size of 200 mm. Then, the mineral asphalt is crushed for the third time to obtain an intermediate with a particle size of 20 mm. The moisture content of the intermediate is 13-15%;

[0068] (2) Blending: adding insulating material A to the intermediate (the amount of insulating material A added accounts for 20% of the total weight of the intermediate and insulating material A) to obtain a primary mixture (particle size of 10 mm, moisture content ≤ 10%), and then adding insulating material B again (the amount of the intermediate added accounts for 40% of the total weight of the intermediate, insulating material A and insulating material B) to obtain a secondary mixture (particle size of 10 mesh, moisture content ≤ 7%);

[0069] (3) Screening: Screening the secondary mixture to obtain a semi-finished product (particle size of 100 mesh, moisture content ≤5%);

[0070] (4) Drying: The semi-finished product is dried once to obtain a product with a moisture content of ≤3.5%, and then dried twice to obtain a finished product EP (moisture content ≤2%).

[0071] Example 4

[0072] A processing technology for mineral asphalt, specifically comprising the following steps:

[0073] (1) Crushing: The mineral asphalt is crushed for the first time to obtain a mineral asphalt with a particle size of 400 mm, and then crushed for the second time to obtain a mineral asphalt with a particle size of 50 mm. Then, the mineral asphalt is crushed for the third time to obtain an intermediate with a particle size of 20 mm. The moisture content of the intermediate is 13-15%;

[0074] (2) Blending: adding insulating material A to the intermediate (the amount of insulating material A added accounts for 25% of the total weight of the intermediate and insulating material A) to obtain a primary mixture (particle size of 15 mm, moisture content ≤ 10%), and then adding insulating material B again (the amount of the intermediate added accounts for 45% of the total weight of the intermediate, insulating material A and insulating material B) to obtain a secondary mixture (particle size of 15 mesh, moisture content ≤ 7%);

[0075] (3) Screening: Screening the secondary mixture to obtain a semi-finished product (particle size of 150 mesh, moisture content ≤5%);

[0076] (4) Drying: The semi-finished product is dried once to obtain a product with a moisture content of ≤3.5%, and then dried twice to obtain a finished product EP (moisture content ≤2%).

[0077] Example 5

[0078] A processing technology for mineral asphalt, specifically comprising the following steps:

[0079] (1) Crushing: The mineral asphalt is crushed for the first time to obtain a mineral asphalt with a particle size of 300 mm, and then crushed for the second time to obtain a mineral asphalt with a particle size of 100 mm. Then, the mineral asphalt is crushed for the third time to obtain an intermediate with a particle size of 18 mm. The moisture content of the intermediate is 13-15%;

[0080] (2) Blending: adding insulating material A to the intermediate (the amount of insulating material A added accounts for 25% of the total weight of the intermediate and insulating material A) to obtain a primary mixture (particle size of 15 mm, moisture content ≤ 10%), and then adding insulating material B again (the amount of the intermediate added accounts for 45% of the total weight of the intermediate, insulating material A and insulating material B) to obtain a secondary mixture (particle size of 15 mesh, moisture content ≤ 7%);

[0081] (3) Screening: Screening the secondary mixture to obtain a semi-finished product (particle size of 200 mesh, moisture content ≤5%);

[0082] (4) Drying: The semi-finished product is dried once to obtain a product with a moisture content of ≤3.5%, and then dried twice to obtain a finished product EP (moisture content ≤2%).

[0083] Example 6

[0084] A processing technology for mineral asphalt, specifically comprising the following steps:

[0085] (1) Crushing: The mineral asphalt is crushed for the first time to obtain a mineral asphalt with a particle size of 200 mm, and then crushed for the second time to obtain a mineral asphalt with a particle size of 150 mm. Then, the mineral asphalt is crushed for the third time to obtain an intermediate with a particle size of 18 mm. The moisture content of the intermediate is 13-15%;

[0086] (2) Blending: adding insulating material A to the intermediate (the amount of insulating material A added accounts for 25% of the total weight of the intermediate and insulating material A) to obtain a primary mixture (particle size of 15 mm, moisture content ≤ 10%), and then adding insulating material B again (the amount of the intermediate added accounts for 45% of the total weight of the intermediate, insulating material A and insulating material B) to obtain a secondary mixture (particle size of 15 mesh, moisture content ≤ 7%);

[0087] (3) Screening: Screening the secondary mixture to obtain a semi-finished product (particle size of 250 mesh, moisture content ≤5%);

[0088] (4) Drying: The semi-finished product is dried once to obtain a product with a moisture content of ≤3.5%, and then dried twice to obtain a finished product EP (moisture content ≤2%).

[0089] Example 7

[0090] A processing technology for mineral asphalt, specifically comprising the following steps:

[0091] (1) Crushing: The mineral asphalt is crushed for the first time to obtain a mineral asphalt with a particle size of 100 mm, and then crushed for the second time to obtain a mineral asphalt with a particle size of 80 mm. Then, the mineral asphalt is crushed for the third time to obtain an intermediate with a particle size of 16 mm. The moisture content of the intermediate is 13-15%;

[0092] (2) Blending: adding insulating material A to the intermediate (the amount of insulating material A added accounts for 25% of the total weight of the intermediate and insulating material A) to obtain a primary mixture (particle size of 15 mm, moisture content ≤ 10%), and then adding insulating material B again (the amount of the intermediate added accounts for 45% of the total weight of the intermediate, insulating material A and insulating material B) to obtain a secondary mixture (particle size of 15 mesh, moisture content ≤ 7%);

[0093] (3) Screening: Screening the secondary mixture to obtain a semi-finished product (particle size of 300 mesh and moisture content of 5%);

[0094] (4) Drying: The semi-finished product is dried once to obtain a product with a moisture content of ≤3.5, and then dried twice to obtain the finished product EP (moisture content ≤2%).

[0095] Example 8

[0096] A processing technology for mineral asphalt, specifically comprising the following steps:

[0097] (1) Crushing: The mineral asphalt is crushed for the first time to obtain a mineral asphalt with a particle size of 50 mm, and then crushed for the second time to obtain a mineral asphalt with a particle size of 40 mm. Then, the mineral asphalt is crushed for the third time to obtain an intermediate with a particle size of 16 mm. The moisture content of the intermediate is 13-15%;

[0098] (2) Blending: adding insulating material A to the intermediate (the amount of insulating material A added accounts for 25% of the total weight of the intermediate and insulating material A) to obtain a primary mixture (particle size of 15 mm, moisture content ≤ 10%), and then adding insulating material B again (the amount of the intermediate added accounts for 45% of the total weight of the intermediate, insulating material A and insulating material B) to obtain a secondary mixture (particle size of 15 mesh, moisture content ≤ 7%);

[0099] (3) Screening: Screening the secondary mixture to obtain a semi-finished product (particle size 350 mesh, moisture content ≤ 5%);

[0100] (4) Drying: The semi-finished product is dried once to obtain a product with a moisture content of ≤3.5%, and then dried twice to obtain a finished product EP (moisture content ≤2%).

[0101] The specific types of the isolation material A and the isolation material B in the above embodiment are shown in the following table:

[0102] Table 1 Types of insulating material A and insulating material B in various embodiments

[0103]

[0104] Comparative Example 1

[0105] The only difference from Example 1 is that only one mixing is performed, specifically the following steps:

[0106] (1) Crushing: The mineral asphalt is crushed for the first time to obtain a mineral asphalt with a particle size of 500 mm, and then crushed for the second time to obtain a mineral asphalt with a particle size of 200 mm. Then, the mineral asphalt is crushed for the third time to obtain an intermediate with a particle size of 20 mm. The moisture content of the intermediate is 13-15%;

[0107] (2) Blending: adding insulating material A (the amount of insulating material A added accounts for 25% of the total weight of the intermediate and insulating material A) and insulating material B (the amount of the intermediate added accounts for 45% of the total weight of the intermediate, insulating material A and insulating material B) to the intermediate to obtain a mixture (particle size of 15 mesh, moisture content ≤7%);

[0108] (3) Screening: Screening the mixture to obtain a semi-finished product (particle size of 100 mesh, moisture content ≤5%);

[0109] (4) Drying: The semi-finished product is dried once to obtain a product with a moisture content of ≤3.5%, and then dried twice to obtain a finished product EP (moisture content ≤2%).

[0110] The types of the isolation material A and the isolation material B are the same as those in the first embodiment.

[0111] Comparative Example 2

[0112] The only difference from Example 1 is that the isolation material A is replaced by an equal amount of carbon black, and the isolation material B is replaced by an equal amount of petroleum residue. Specifically, the following steps are performed:

[0113] (1) Crushing: The mineral asphalt is crushed for the first time to obtain a mineral asphalt with a particle size of 500 mm, and then crushed for the second time to obtain a mineral asphalt with a particle size of 200 mm. Then, the mineral asphalt is crushed for the third time to obtain an intermediate with a particle size of 20 mm. The moisture content of the intermediate is 13-15%;

[0114] (2) Blending: adding insulating material A to the intermediate (the amount of insulating material A added accounts for 25% of the total weight of the intermediate and insulating material A) to obtain a primary mixture (particle size of 15 mm, moisture content ≤ 10%), and then adding insulating material B again (the amount of the intermediate added accounts for 45% of the total weight of the intermediate, insulating material A and insulating material B) to obtain a secondary mixture (particle size of 15 mesh, moisture content ≤ 7%);

[0115] (3) Screening: Screening the secondary mixture to obtain a semi-finished product (particle size of 100 mesh, moisture content ≤5%);

[0116] (4) Drying: The semi-finished product is dried once to obtain a product with a moisture content of ≤3.5%, and then dried twice to obtain a finished product EP (moisture content ≤2%).

[0117] Comparative Example 3

[0118] The only difference from Example 1 is that the amount of the insulating material A added accounts for 10% of the total weight of the intermediate and the insulating material A, and the amount of the intermediate added accounts for 60% of the total weight of the intermediate, the insulating material A and the insulating material B. Specifically, the following steps are performed:

[0119] (1) Crushing: The mineral asphalt is crushed for the first time to obtain a mineral asphalt with a particle size of 500 mm, and then crushed for the second time to obtain a mineral asphalt with a particle size of 200 mm. Then, the mineral asphalt is crushed for the third time to obtain an intermediate with a particle size of 20 mm. The moisture content of the intermediate is 13-15%;

[0120] (2) Blending: adding insulating material A to the intermediate (the amount of insulating material A added accounts for 10% of the total weight of the intermediate and insulating material A) to obtain a primary mixture (particle size of 15 mm, moisture content ≤ 10%), and then adding insulating material B again (the amount of the intermediate added accounts for 60% of the total weight of the intermediate, insulating material A and insulating material B) to obtain a secondary mixture (particle size of 15 mesh, moisture content ≤ 7%);

[0121] (3) Screening: Screening the secondary mixture to obtain a semi-finished product (particle size of 100 mesh, moisture content ≤5%);

[0122] (4) Drying: The semi-finished product is dried once to obtain a product with a moisture content of ≤3.5%, and then dried twice to obtain a finished product EP (moisture content ≤2%).

[0123] The types of the isolation material A and the isolation material B are the same as those in the first embodiment.

[0124] Comparative Example 4

[0125] The only difference from Example 1 is that the amount of the insulating material A added accounts for 40% of the total weight of the intermediate and the insulating material A, and the amount of the intermediate added accounts for 30% of the total weight of the intermediate, the insulating material A and the insulating material B. Specifically, the following steps are performed:

[0126] (1) Crushing: The mineral asphalt is crushed for the first time to obtain a mineral asphalt with a particle size of 500 mm, and then crushed for the second time to obtain a mineral asphalt with a particle size of 200 mm. Then, the mineral asphalt is crushed for the third time to obtain an intermediate with a particle size of 20 mm. The moisture content of the intermediate is 13-15%;

[0127] (2) Blending: adding insulating material A to the intermediate (the amount of insulating material A added accounts for 40% of the total weight of the intermediate and insulating material A) to obtain a primary mixture (particle size of 15 mm, moisture content ≤ 10%), and then adding insulating material B again (the amount of the intermediate added accounts for 30% of the total weight of the intermediate, insulating material A and insulating material B) to obtain a secondary mixture (particle size of 15 mesh, moisture content ≤ 7%);

[0128] (3) Screening: Screening the secondary mixture to obtain a semi-finished product (particle size of 100 mesh, moisture content ≤5%);

[0129] (4) Drying: The semi-finished product is dried once to obtain a product with a moisture content of ≤3.5%, and then dried twice to obtain a finished product EP (moisture content ≤2%).

[0130] The types of the isolation material A and the isolation material B are the same as those in the first embodiment.

[0131] Application Examples 1-8, Application Comparative Examples 1-4:

[0132] A waterproof roll material: an upper surface insulating layer (1), an upper surface modified asphalt coating layer (2), an intermediate reinforcement layer (3), a lower surface modified asphalt coating layer (4) and a lower surface insulating layer (5) are sequentially arranged from top to bottom; the material of the upper surface modified asphalt coating layer (2) and the material of the lower surface modified asphalt coating layer (4) both contain finished EP.

[0133] The preparation method of the waterproof coiled material is specifically as follows:

[0134] S1: coating an upper surface modified asphalt coating layer and a lower surface modified asphalt coating layer on the upper and lower surfaces of the middle reinforcement layer respectively, and obtaining a modified asphalt reinforcement layer after cooling;

[0135] S2: Covering the upper surface of the modified asphalt reinforcement layer with an upper surface insulating layer; subjecting the lower surface of the modified asphalt reinforcement layer to water absorption and drying treatment, and covering the material of the lower surface insulating layer with the lower surface insulating layer with the modified asphalt reinforcement layer to obtain a coil precursor;

[0136] S3: The coil precursor is sequentially subjected to roller cooling and shaping, conveying and packaging machine winding and cutting processes to obtain a waterproof coil.

[0137] The preparation methods of the upper surface modified asphalt coating layer and the lower surface modified asphalt coating layer are specifically the following steps:

[0138] Heat 90# asphalt and 200# asphalt to 160-165℃, then homogenize the heated asphalt with Li Changrong star-type SBS4402 at 185-195℃ for 1.5h to obtain Y0 mixture; add finished EP and light stabilizer 2020 to the Y0 mixture at 180-190℃ and mix and stir for 60min to obtain Y1 mixture; mix the Y1 mixture with 200-mesh light calcium and stir for 50min to obtain modified asphalt coating.

[0139] The upper and lower insulating layers are made of polyethylene film (both 0.5 mm thick), and the base of the middle reinforcing layer is a national standard type II base produced by Tiandingfeng Nonwoven Fabric Co., Ltd., with a thickness of 1 mm and a gram weight of 250 g / m 2 ; The thickness of the upper surface modified asphalt coating layer and the lower surface modified asphalt coating layer are both 1mm.

[0140] The finished products EP in the above steps are the finished products EP prepared by Examples 1-8 and Comparative Examples 1-4, respectively. Finally, the waterproof membranes of Application Examples 1-8 and Application Comparative Examples 1-4 are respectively prepared.

[0141] Test 1: The finished EP produced in each embodiment of the present invention and the comparative example was tracked for 3 months to observe whether there was any adhesion or agglomeration.

[0142] Physical and application performance tests were performed on the waterproof membranes of application examples 1-8 and the waterproof membranes of application comparative examples 1-4:

[0143] Test 2: Whether the finished EP in the waterproof membrane is segregated is tested for softening point under 163℃, 48h aging conditions;

[0144] Test 3: Thermal aging Low temperature flexibility The low temperature flexibility attenuation and seam peel strength retention rate were evaluated according to the aging conditions of 80°C and 240h in GB18242-2008;

[0145] Test 4: Artificial climate accelerated aging Low temperature flexibility attenuation was evaluated according to the 720h aging conditions in GB18242-2008.

[0146] The results are shown in Table 2.

[0147] Table 2 Performance of waterproof membrane in the present invention

[0148]

[0149]

[0150] From the above results, it can be seen that after 3 months of tracking, the finished EP obtained by the processing technology of each embodiment of the present invention has no sticking and agglomeration phenomenon, the finished EP in the prepared waterproof membrane does not segregate, and the waterproof membrane has excellent aging resistance.

[0151] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions of the technical solution of the present invention by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the present invention.

Claims

1. A processing technology for mineral asphalt, characterized in that: The following steps are involved: The mineral asphalt is crushed, blended, screened and dried to obtain the finished EP; The blending includes adding isolation material A to the intermediate obtained in the crushing step to obtain a primary mixture, and adding isolation material B again to obtain a secondary mixture; The isolation material A and the isolation material B both include one or more of hard asphalt, filler and rubber powder.

2. The processing technology according to claim 1, characterized in that: The crushing includes more than two crushing steps; preferably, it includes a first crushing, a second crushing and a third crushing; the particle size of the first crushing is ≤500mm, the particle size of the second crushing is ≤200mm, and the particle size of the third crushing is ≤20mm.

3. The processing technology according to claim 1, characterized in that: The particle size of the primary mixture is 10-20 mm, and the moisture content is ≤10%. The particle size of the secondary mixture is 10-20 mesh, and the moisture content is ≤7%.

4. The processing technology according to claim 1, characterized in that: The insulating material A accounts for 20-30% of the total weight of the intermediate and the insulating material A; the intermediate accounts for 40-50% of the total weight of the intermediate, the insulating material A and the insulating material B.

5. The processing technology according to claim 4, characterized in that: The insulating material A accounts for 25% of the total weight of the intermediate and the insulating material A; the intermediate accounts for 45% of the total weight of the intermediate, the insulating material A and the insulating material B.

6. The processing technology according to claim 1, characterized in that: The filler includes one or more of talc, fly ash and light calcium, and the rubber powder includes modified powder.

7. The processing technology according to claim 1, characterized in that: The isolation material A is modified powder, and the isolation material B is hard asphalt and / or filler.

8. The processing technology according to claim 6, characterized in that: The modified powder comprises waste rubber powder, and the particle size of the modified powder is ≤60 meshes.

9. The processing technology according to claim 1, characterized in that: The screening includes screening the secondary mixture to obtain a semi-finished product; the particle size of the semi-finished product is ≤100 meshes and the moisture content is ≤5%.

10. The processing technology according to claim 1, characterized in that: The drying comprises two or more drying steps; preferably, comprises a primary drying and a secondary drying; and the moisture content of the product after the primary drying is ≤3.5%.

11. The processing technology according to claim 1, characterized in that: The particle size of the finished product EP is ≤100 meshes, and the moisture content is ≤2%.

12. Use of the finished EP obtained by the processing technology according to any one of claims 1 to 11 in the preparation of waterproof membranes.

13. A waterproof roll material, characterized in that: It includes an upper covering isolation layer, an upper surface modified asphalt coating layer, an intermediate reinforcement layer, a lower surface modified asphalt coating layer and a lower covering isolation layer; the upper surface modified asphalt coating layer material and the lower surface modified asphalt coating layer material both include the finished product EP obtained by the processing technology described in any one of claims 1-11.

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