Non-cured rubber asphalt waterproof coating composition, non-cured rubber asphalt waterproof coating and preparation method and application thereof

Abstract

The application relates to the technical field of building waterproofing, and discloses a composition for non-cured rubber asphalt waterproofing paint, non-cured rubber asphalt waterproofing paint, a preparation method and application thereof. The composition contains bitumen I, SBS, SBR, a composite filler and a modifier; the composite filler is a combination of nano-silicon dioxide, nano-calcium carbonate and slag powder in a content mass ratio of 1:0.5-2:2.5-12; a raw material composition A for forming the modifier contains bitumen II, modified fibers, white mud and fly ash; the non-cured rubber asphalt waterproofing paint provided by the application has excellent low-temperature bending property, heat aging property, high-temperature anti-flowing property and bonding strength, and the utilization rate of solid waste is significantly improved, and the cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of building waterproofing technology, specifically to a composition for a non-curing rubber asphalt waterproof coating, a non-curing rubber asphalt waterproof coating, its preparation method, and its application. Background Technology

[0002] Non-curing rubber asphalt waterproof coatings on the market are mainly based on asphalt, modified with various elastomers and plastics. This material system has significant advantages: it does not cure in the air for a long time and maintains its viscous gel-like properties after application; it has strong adhesion to the substrate, even on damp surfaces, and can bond with any foreign matter; it has excellent elongation and flexibility, effectively adapting to substrate deformation; its unique self-healing ability can automatically repair construction damage or micro-cracks, maintaining an intact waterproof layer; in addition, it can be used simultaneously with other waterproof materials to form a composite waterproof system, significantly improving the reliability and durability of the waterproof system.

[0003] However, because non-curing rubber asphalt waterproof coatings use a large amount of asphalt as a raw material, its inherent molecular structure also brings insurmountable defects. Asphalt is relatively sensitive to heat, oxygen, and ultraviolet light. Long-term exposure can easily lead to aging, causing the material to become brittle and its low-temperature flexibility to decrease, making it prone to cracking in low-temperature environments. At the same time, its viscosity-temperature characteristics are significant. During high-temperature summers or when applying it to vertical surfaces, it is prone to sagging and sliding under gravity, affecting the uniformity of the coating thickness and the final waterproof quality.

[0004] Current technologies primarily improve aging resistance and anti-sagging properties by adding higher proportions of polymer elastomers (such as SBS) or special temperature-controlled additives (such as thixotropic agents). While this method has some effect, it significantly increases raw material costs and often falls into a trade-off between high and low temperature performance: improving high-temperature stability often comes at the expense of low-temperature flexibility, while improving flexibility may exacerbate high-temperature flow. In the current industry context of slowing market demand and increasingly stringent cost control, the model of solely relying on high-performance additives to improve quality is unsustainable, and there is an urgent need to explore a new path that balances performance and cost.

[0005] On the other hand, the resource utilization of solid waste has become an important development direction in the field of materials science. How to effectively combine suitable solid waste materials as functional fillers or modifying components with asphalt systems, while controlling or even reducing raw material costs, and synergistically resolving the technical contradiction of balancing anti-aging properties, high-temperature stability, and low-temperature flexibility, has significant research value and application prospects for promoting sustainable development in the industry and achieving comprehensive product performance improvement and cost optimization. Summary of the Invention

[0006] The purpose of this invention is to solve the problem of difficulty in synergistically optimizing low-temperature flexibility, thermal aging performance, high-temperature anti-sagging and adhesion performance of existing non-curing rubber asphalt waterproof coatings, while overcoming the problem of excessively high preparation costs caused by over-reliance on expensive modifiers.

[0007] To achieve the above objectives, a first aspect of the present invention provides a composition for a non-curing rubber asphalt waterproof coating, the composition comprising asphalt I, SBS, SBR, composite filler and modifier; Based on the total mass of the composition, the content of the asphalt is 40-70 wt%, the content of the SBS is 1.5-3 wt%, the content of the SBR is 1.5-3 wt%, the content of the composite filler is 25-45 wt%, and the content of the modifier is 5-10 wt%. The composite filler is a combination of nano-silica, nano-calcium carbonate and slag powder in a mass ratio of 1:0.5-2:2.5-12. The raw material composition A forming the modifier contains asphalt II, modified fiber, white mud, and fly ash; the modified fiber is fiber modified by a silane coupling agent; based on the total mass of the raw material composition A, the content of asphalt II is 50-70 wt%, the content of modified fiber is 1-3 wt%, the content of white mud is 15-35 wt%, and the content of fly ash is 10-18 wt%.

[0008] A second aspect of the present invention provides a method for preparing a non-curing rubber asphalt waterproof coating, the method being carried out using the composition described in the first aspect, comprising: contact mixing a mixture containing the non-curing rubber asphalt waterproof coating with a mixture of the components in the composition to obtain the non-curing rubber asphalt waterproof coating.

[0009] A third aspect of the present invention provides a non-curing rubber asphalt waterproof coating prepared by the method described in the second aspect.

[0010] The fourth aspect of the present invention provides the application of the non-curing rubber asphalt waterproof coating described by the third party in the field of building waterproofing.

[0011] This invention, by combining a specific type and ratio of composite filler with the modifier provided by this invention, can form an interfacial reinforcement effect and anti-aging synergistic effect with asphalt, SBS, and SBR, fill the gaps between asphalt molecules, and reduce molecular migration. The resulting waterproof coating has at least the following beneficial effects compared with the prior art: (1) The non-curing rubber asphalt waterproof coating provided by the present invention has excellent low-temperature crack resistance and anti-aging properties; (2) The present invention can utilize three types of industrial solid wastes, namely white mud, fly ash and slag powder, at the same time. The total amount of solid waste used is not less than 23 wt% of the total mass of the waterproof coating. The utilization rate of solid waste is significantly improved. Moreover, through the scientific compounding and adjustment system of the present invention, the limitations of using a single solid waste are avoided, and the heat resistance and bonding strength of the coating can be significantly improved. (3) The non-curing rubber asphalt waterproof coating provided by the present invention has stable high-temperature anti-sagging properties and reduces the overall cost of preparation, which meets the cost control requirements during the downturn of the market environment; (4) The waterproof coating provided by the present invention has strong construction adaptability and can be applied in a wide temperature range of -5℃ to 40℃. It also has excellent compatibility with other waterproof materials such as waterproof membranes and self-adhesive films, and can form a composite waterproof system to improve the overall reliability of waterproofing. Detailed Implementation

[0012] 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.

[0013] In this invention, SBS refers to styrene-butadiene-styrene block copolymer, and SBR refers to styrene-butadiene rubber, also known as polystyrene-butadiene copolymer.

[0014] As mentioned above, a first aspect of the present invention provides a composition for a non-curing rubber asphalt waterproof coating, the composition containing asphalt I, SBS, SBR, composite filler and modifier; Based on the total mass of the composition, the content of the asphalt is 40-70 wt%, the content of the SBS is 1.5-3 wt%, the content of the SBR is 1.5-3 wt%, the content of the composite filler is 25-45 wt%, and the content of the modifier is 5-10 wt%. The composite filler is a combination of nano-silica, nano-calcium carbonate and slag powder in a mass ratio of 1:0.5-2:2.5-12. The raw material composition A forming the modifier contains asphalt II, modified fiber, white mud, and fly ash; the modified fiber is fiber modified with a silane coupling agent; based on the total mass of the raw material composition A, the content of asphalt II is 50-70 wt%, the content of modified fiber is 1-3 wt%, the content of white mud is 15-35 wt%, and the content of fly ash is 10-18 wt%.

[0015] It should be noted that white mud, slag powder, and fly ash are industrial solid wastes. This invention does not have a particular limitation on their sources. They can be direct by-products of industrial production or purchased commercially. White mud refers to white, high-moisture mud-like waste generated during alkaline papermaking, alumina production, or seawater alkali production. Its main components are calcium carbonate, calcium hydroxide, and other impurities. Slag powder refers to the micro-powder material made by grinding molten slag discharged during the blast furnace pig iron smelting process after water quenching or air quenching. Fly ash refers to the fine ash powder collected from the flue gas after combustion in coal-fired power plant boilers.

[0016] It should be noted that in this invention, SBS refers to styrene-butadiene-styrene block copolymer; SBR refers to polystyrene-butadiene copolymer.

[0017] Preferably, the composite filler is a combination of nano-silica, nano-calcium carbonate and slag powder in a mass ratio of 1:1-2:2.5-10.

[0018] More preferably, the composite filler is a combination of nano-silica, nano-calcium carbonate, and slag powder in a mass ratio of 1:1.2-1.8:3-8. The inventors have discovered that, under this preferred embodiment, the non-curing rubber asphalt waterproof coating, optimized through the interface enhancement effect, exhibits superior low-temperature resistance and anti-aging properties, as well as significantly improved high-temperature anti-sagging and adhesion properties.

[0019] In a preferred embodiment, the average diameter of the nano-silica particles is 10-20 nm.

[0020] Preferably, the average diameter of the nano-calcium carbonate particles is 50-80 nm.

[0021] Preferably, the specific surface area of ​​the slag powder is 400-450 m². 2 / kg; In a preferred embodiment, the nano-silica is hydrophobically modified nano-silica.

[0022] This invention does not limit the modification method of hydrophobic modified nano-silica, as long as it can effectively improve the hydrophobic properties and the compatibility with the asphalt system. It can be a silane coupling agent surface grafting method, a polymer coating method, or an in-situ modification method, a physical adsorption method, or a combination of these methods. For example, taking the silane coupling agent surface grafting modification method as an example, the hydrophobic modified nano-silica is prepared by a method including the following steps: In the presence of solvent A and at a pH of 4-5, nano-silica is mixed with silane coupling agent KH570, and then the product is dried to obtain the hydrophobically modified nano-silica. The amount of nano-silica used is 10-30 parts by weight relative to 100 parts by weight of solvent A, and the amount of silane coupling agent KH570 used is 0.1-4 parts by weight. The mixing conditions include a temperature of 60-90°C and a time of 2-6 hours.

[0023] Preferably, the nano-silica is dried before use; however, the present invention does not limit the drying conditions.

[0024] In a preferred embodiment, solvent A is selected from ethanol.

[0025] Preferably, the nano-calcium carbonate is nano-calcium carbonate surface-modified with phthalate coupling agent and / or aluminate coupling agent.

[0026] This invention does not limit the modification method of nano-calcium carbonate with phthalate coupling agents and / or aluminate coupling agents, and those skilled in the art can perform the modification using conventional techniques. For example, taking phthalate coupling agent surface modification as an example, the nano-calcium carbonate with phthalate coupling agent surface modification is prepared by a method including the following steps: Nano-calcium carbonate is mixed with titanate coupling agent TC-114 to obtain nano-calcium carbonate with surface modification by titanate coupling agent; the amount of titanate coupling agent TC-114 is 2-3 parts by weight relative to 100 parts by weight of nano-calcium carbonate; the mixing conditions include: temperature of 80-90℃, time of 30-60 min, and stirring speed of 600-1000 rpm.

[0027] Preferably, the nano-calcium carbonate is dried before use; however, the present invention does not limit the drying conditions.

[0028] Preferably, the asphalt I is a combination of 70# asphalt and 200# asphalt with a mass ratio of 1:3.5-12. In this preferred embodiment, the viscosity and softening point of the two asphalts work synergistically to balance the application consistency and high / low temperature performance of the waterproof coating, avoiding the defects of single asphalt becoming brittle at low temperatures or flowing easily at high temperatures.

[0029] Preferably, the modified fiber is selected from at least one of modified basalt fiber, modified glass fiber, and modified carbon fiber.

[0030] More preferably, the modified fiber is prepared by a method comprising the following steps: 10-30 parts by weight of fiber are mixed with 80-120 parts by weight of an alcohol solution of silane coupling agent with a concentration of 2-3 wt%, and then the product is dried to obtain the modified fiber; the mixing conditions include a temperature of 40-70°C and a time of 1-3 hours.

[0031] Preferably, the fibers are dried before use; however, the present invention does not limit the drying conditions.

[0032] Preferably, the asphalt II is selected from at least one of 70# asphalt and 200# asphalt.

[0033] More preferably, the asphalt II is 70# asphalt. The inventors have found that under this preferred embodiment, the compatibility of the components is better, and the prepared modifier can significantly improve the high-temperature anti-sagging properties and interfacial adhesion of the waterproof coating.

[0034] Preferably, the loss on ignition of the fly ash is ≤5%.

[0035] Preferably, the modifier is prepared by a method comprising the following steps: mixing a raw material composition A containing asphalt II, modified fiber, white mud and fly ash.

[0036] More preferably, the mixing operation method includes: SI-1. Asphalt II is subjected to a first hot melt at 100-140℃ under the condition of first stirring to obtain a first hot melt; the speed of the first stirring is 200-500 rpm. SI-2, The modified fiber is mixed with the hot melt to obtain the first material; SI-3. The white mud, fly ash and the first material are mixed in a second mixture to obtain the modifier.

[0037] In a preferred embodiment, the conditions for the first mixing include: a temperature of 140-150°C, a time of 0.5-1 h, and a stirring speed of 400-500 rpm.

[0038] In a preferred embodiment, the conditions for the second mixing include: a temperature of 130-140°C, a time of 1-2 hours, and a stirring speed of 300-400 rpm.

[0039] As previously stated, a second aspect of the present invention provides a method for preparing a non-curing rubber asphalt waterproof coating, the method being carried out using the composition described in the first aspect, comprising: contact mixing a mixture containing the non-curing rubber asphalt waterproof coating with a mixture of the components in the composition to obtain the non-curing rubber asphalt waterproof coating.

[0040] Preferably, the contact mixing operation method includes: SII-1. Asphalt I is subjected to a second hot melt at 100-140℃ under the condition of second stirring to obtain a second hot melt; the speed of the second stirring is 200-500 rpm; SII-2, The modifier is mixed with the second hot melt in a first contact to obtain intermediate material I; SII-3: Mix SBS, SBR and intermediate material I in a second contact to obtain intermediate material II; SII-4. The premixed composite filler is mixed with the intermediate material II in a third contact to obtain the non-curing rubber asphalt waterproof coating.

[0041] Preferably, the conditions for the first contact mixing include: a temperature of 120-140°C, a time of 5-15 min, and a stirring speed of 400-600 rpm.

[0042] Preferably, the conditions for the second contact mixing include: a temperature of 130-140°C, a time of 0.5-4 hours, and a stirring speed of 400-500 rpm.

[0043] Preferably, the conditions for the third contact mixing include: a temperature of 170-180℃, a time of 0.5-2h, and a stirring speed of 400-500rpm.

[0044] As previously stated, a third aspect of the present invention provides a non-curing rubber asphalt waterproof coating prepared by the method described in the second aspect.

[0045] As mentioned above, the fourth aspect of the present invention provides the application of the non-curing rubber asphalt waterproof coating described in the third aspect above in the field of building waterproofing.

[0046] The present invention will be described in detail below through embodiments.

[0047] Unless otherwise specified, all reagents and raw materials used in the following examples are commercially available products, and all reagents are analytical grade products. In the following examples, each wt% represents 10g.

[0048] raw material: 70# asphalt: purchased from China Petrochemical Corporation Maoming Petrochemical Co., Ltd.; 200# asphalt: purchased from Foshan Gaofu PetroChina Fuel Asphalt Co., Ltd. SBS: Purchased from LG Corporation of South Korea, model SBS 501; SBR: Purchased from Shandong Haifang Rubber Technology Co., Ltd., model SBR 1502; Calcium powder: 1500 mesh, purchased from Jiangxi Guangyuan Chemical Co., Ltd.; White clay: moisture content 15wt%, specific surface area 350m² / kg, purchased from Southern Alkali Industry Co., Ltd.; Nano-silica (particle diameter 10-20nm) and nano-calcium carbonate (particle diameter 50-80nm): purchased from Nanjing EPT Nanomaterials Co., Ltd. Fly ash: Loss on ignition is 3.5%, purchased from Guodian Power Datong Power Generation Co., Ltd.; Slag powder: specific surface area of ​​420m² / kg, purchased from Tangshan Jidong Cement Co., Ltd. Silane coupling agents KH550 and KH570: industrial grade, purchased from Nanjing Shuguang Chemical Group; Titanate coupling agent TC-114: industrial grade, purchased from Jinan Shengfeng Chemical Co., Ltd.; Basalt fiber: 4mm in length and 15μm in diameter, purchased from Hebei Xingtai Basalt Fiber Co., Ltd.

[0049] Preparation Example A-1 This preparation example is used to provide hydrophobically modified nano-silica, and the preparation method includes: Nano-silica was dried in a vacuum drying oven at 110℃ for 2 hours. 100 parts of the dried nano-silica were dispersed in 500 parts of anhydrous ethanol and ultrasonically dispersed for 30 minutes. 4 parts of silane coupling agent KH570 were added, and the pH was adjusted to 4.5 with acetic acid. The mixture was stirred at 80℃ for 4 hours. After the reaction was completed, the mixture was centrifuged, washed three times with anhydrous ethanol, and dried in an oven at 80℃ until constant weight to obtain hydrophobically modified nano-silica.

[0050] Preparation Example A-2 This preparation example is used to provide nano-calcium carbonate with a surface modified by a phthalate coupling agent. The preparation method includes: Nano-calcium carbonate was dried at 100℃ for 3 hours. 100 parts of the dried nano-calcium carbonate were added to a high-speed mixer, heated to 85℃, and 2.5 parts of titanate coupling agent TC-114 were added. The mixture was stirred at 800 rpm for 30 minutes. After cooling to room temperature, the material was discharged to obtain surface-coupled modified nano-calcium carbonate.

[0051] Preparation Example A-3 This preparation example is used to provide modified fibers, and the preparation method includes: Basalt fibers were dried in a 120℃ drying oven for 4 hours. 100 parts of the dried basalt fibers were then immersed in 500 parts of a 2.5% (w / w) ethanol solution of silane coupling agent KH550 and stirred at a constant temperature of 60℃ for 2 hours. After immersion, the fibers were removed and dried in a 90℃ oven to constant weight to obtain basalt fibers modified with silane coupling agent KH550.

[0052] Preparation Example 1 This preparation example illustrates that the modifier provided by the present invention is prepared by the following method: SI-1. 70# asphalt is subjected to a first hot melt at 120℃ under the first stirring condition to obtain a first hot melt material; the first stirring speed is 300 rpm. SI-2. The modified fiber is mixed with the hot melt to obtain a first material; the conditions for the first mixing include: temperature of 145°C, time of 0.8h, and stirring speed of 450rpm. SI-3. The white mud, fly ash and the first material are mixed in a second mixture to obtain a modifier named Z1. The conditions for the second mixture are: temperature of 135℃, time of 1.5h and stirring speed of 350rpm. Based on the total mass of the raw materials used (raw material composition A), the amount of 70# asphalt is 60wt%, the amount of modified fiber is 0.2wt%, the amount of white mud is 23.88wt%, and the content of fly ash is 15.92wt%.

[0053] Preparation Example 2 This preparation example illustrates that the modifier provided by the present invention is prepared by the following method: SI-1. 70# asphalt is subjected to a first hot melt at 120℃ under the first stirring condition to obtain a first hot melt material; the first stirring speed is 300 rpm. SI-2. The modified fiber is mixed with the hot melt to obtain a first material; the conditions for the first mixing include: temperature of 140°C, time of 1 hour, and stirring speed of 400 rpm. SI-3. The white mud, fly ash and the first material are mixed in a second mixture to obtain a modifier named Z2. The conditions for the second mixing are: temperature of 130℃, time of 2h and stirring speed of 300rpm. Based on the total mass of the raw materials used (raw material composition A), the amount of 70# asphalt is 66.66 wt%, the amount of modified fiber is 0.22 wt%, the amount of white mud is 19.86 wt%, and the content of fly ash is 13.26 wt%.

[0054] Preparation Example 3 This preparation example illustrates that the modifier provided by the present invention is prepared by the following method: SI-1. 70# asphalt is subjected to a first hot melt at 120℃ under the first stirring condition to obtain a first hot melt material; the first stirring speed is 300 rpm. SI-2. The modified fiber is mixed with the hot melt to obtain a first material; the conditions for the first mixing include: temperature of 150°C, time of 0.5h, and stirring speed of 500rpm. SI-3. The white mud, fly ash and the first material are mixed in a second mixture to obtain a modifier named Z3. The conditions for the second mixing are: temperature of 140℃, time of 1h and stirring speed of 400rpm. Based on the total mass of the raw materials used (raw material composition A), the amount of 70# asphalt is 54.49 wt%, the amount of modified fiber is 0.27 wt%, the amount of white mud is 31.66 wt%, and the content of fly ash is 13.58 wt%.

[0055] Preparation Example 4 This preparation example uses a similar process to Preparation Example 1. The difference is that in this preparation example, 200# asphalt of equal mass is used to replace 70# asphalt in Preparation Example 1.

[0056] The rest are the same as in Preparation Example 1.

[0057] Modifier Z4 was prepared.

[0058] Preparation Example 5 This preparation example uses a similar process to Preparation Example 1, except that in this preparation example, kaolin of equal quality is used to replace the white clay in Preparation Example 1.

[0059] The rest are the same as in Preparation Example 1.

[0060] Modifier DZ1 was prepared.

[0061] Preparation Example 6 This preparation example uses a similar process to Preparation Example 1. The difference is that in this preparation example, talc powder of equal mass is used to replace the fly ash in Preparation Example 1.

[0062] The rest are the same as in Preparation Example 1.

[0063] Modifier DZ2 was prepared.

[0064] Preparation Example 7 This preparation example uses a similar process to Preparation Example 1. The difference is that in this preparation example, calcium carbonate of equal mass is used to replace the fly ash in Preparation Example 1.

[0065] The rest are the same as in Preparation Example 1.

[0066] Modifier DZ3 was prepared.

[0067] Preparation Example 8 This preparation example uses a similar process to Preparation Example 1. The difference is that in this preparation example, slag powder of equal mass is used to replace the white mud in Preparation Example 1.

[0068] The rest are the same as in Preparation Example 1.

[0069] Modifier DZ4 was prepared.

[0070] Preparation Example 9 This preparation example uses a similar process to Preparation Example 1, except that fly ash is not added in this preparation example, and the amounts of each raw material are as follows: Based on the total mass of the raw materials used, the amount of 70# asphalt is 75.92 wt%, the amount of modified fiber is 0.2 wt%, and the amount of white mud is 23.88 wt%.

[0071] The rest are the same as in Preparation Example 1.

[0072] Modifier DZ5 was prepared.

[0073] Example 1 SII-1. Asphalt I is subjected to a second hot melt at 120°C under the condition of second stirring to obtain a second hot melt; the speed of the second stirring is 300 rpm. SII-2. The modifier and the second hot melt are mixed in a first contact to obtain intermediate material I. The conditions for the first contact mixing include: temperature of 130°C, time of 10 min, and stirring speed of 400 rpm.

[0074] SII-3. SBS, SBR and intermediate material I are subjected to a second contact mixing to obtain intermediate material II; the conditions for the second contact mixing include: temperature of 135°C, time of 2 hours and stirring speed of 400 rpm. SII-4. The premixed composite filler is mixed with the intermediate material II in a third contact to obtain the non-curing rubber asphalt waterproof coating S1; the conditions for the third contact mixing include: temperature of 175℃, time of 1h, and stirring speed of 500rpm. The modifier is the modifier Z1 obtained in Preparation Example 1; The composite filler is a combination of hydrophobically modified nano-silica, nano-calcium carbonate with phthalate coupling agent surface modification, and slag powder in a content-to-mass ratio of 1:1:2.77. The asphalt I is a combination of 70# asphalt and 200# asphalt with a content-to-mass ratio of 1:6; Based on the total mass of the raw materials used (composition for non-curing rubber asphalt waterproof coating), the amount of asphalt is 53.35 wt%, the amount of SBS is 1.9 wt%, the amount of SBR is 1.9 wt%, the amount of composite filler is 35.23 wt%, and the amount of modifier is 7.62 wt%.

[0075] Example 2 SII-1. Asphalt I is subjected to a second hot melt at 120°C under the condition of second stirring to obtain a second hot melt; the speed of the second stirring is 300 rpm. SII-2. The modifier and the second hot melt are mixed in a first contact to obtain intermediate material I. The conditions for the first contact mixing include: temperature of 130°C, time of 10 min, and stirring speed of 400 rpm.

[0076] SII-3. SBS, SBR and intermediate material I are subjected to a second contact mixing to obtain intermediate material II; the conditions for the second contact mixing include: temperature of 140°C, time of 2 hours and stirring speed of 400 rpm. SII-4. The premixed composite filler is mixed with the intermediate material II in a third contact to obtain the non-curing rubber asphalt waterproof coating S2; the conditions for the third contact mixing include: temperature of 170℃, time of 1h, and stirring speed of 500rpm. The modifier is the modifier Z2 obtained in Preparation Example 2; The composite filler is a combination of hydrophobically modified nano-silica, nano-calcium carbonate with phthalate coupling agent surface modification, and slag powder in a mass ratio of 1:1.8:10. The asphalt I is a combination of 70# asphalt and 200# asphalt with a content-to-mass ratio of 1:11.6; Based on the total mass of the raw materials used (composition for non-curing rubber asphalt waterproof coating), the amount of asphalt is 62.38 wt%, the amount of SBS is 1.5 wt%, the amount of SBR is 1.5 wt%, the amount of composite filler is 29.7 wt%, and the amount of modifier is 4.92 wt%.

[0077] Example 3 SII-1. Asphalt I is subjected to a second hot melt at 120°C under the condition of second stirring to obtain a second hot melt; the speed of the second stirring is 300 rpm. SII-2. The modifier and the second hot melt are mixed in a first contact to obtain intermediate material I. The conditions for the first contact mixing include: temperature of 140°C, time of 10 min, and stirring speed of 400 rpm.

[0078] SII-3. SBS, SBR and intermediate material I are subjected to a second contact mixing to obtain intermediate material II; the conditions for the second contact mixing include: temperature of 130°C, time of 2 hours and stirring speed of 400 rpm. SII-4. The premixed composite filler is mixed with the intermediate material II in a third contact to obtain the non-curing rubber asphalt waterproof coating S3; the conditions for the third contact mixing include: temperature of 180℃, time of 1h, and stirring speed of 500rpm. The modifier is the modifier Z3 obtained in Preparation Example 3; The composite filler is a combination of hydrophobically modified nano-silica, nano-calcium carbonate with phthalate coupling agent surface modification, and slag powder in a mass ratio of 1:1:2.5. The asphalt I is a combination of 70# asphalt and 200# asphalt with a content-to-mass ratio of 1:3.8; Based on the total mass of the raw materials used (composition for non-curing rubber asphalt waterproof coating), the amount of asphalt is 47.43 wt%, the amount of SBS is 2.97 wt%, the amount of SBR is 2.97 wt%, the amount of composite filler is 36.63 wt%, and the amount of modifier is 10 wt%.

[0079] Example 4 This embodiment follows a similar process to Example 1. The difference is that in this embodiment, the modifier Z4 obtained in Preparation Example 4 is used in place of the modifier Z1 in Example 1.

[0080] Everything else is the same as in Example 1.

[0081] A non-curing rubber asphalt waterproof coating S4 was prepared.

[0082] Example 5 This embodiment follows a similar process to Example 1. The difference is that the amount of composite filler used is controlled in the same way as in Example 1. However, the composite filler used in this embodiment is a combination of hydrophobic modified nano-silica, nano-calcium carbonate with phthalate coupling agent surface modification, and slag powder with a content-to-mass ratio of 1:0.5:2.77. Everything else is the same as in Example 1.

[0083] A non-curing rubber asphalt waterproof coating S5 was prepared.

[0084] Example 6 This embodiment follows a similar process to Example 1. The difference is that the amount of composite filler used is controlled in the same way as in Example 1. However, the composite filler in this embodiment is a combination of hydrophobic modified nano-silica, nano-calcium carbonate with phthalate coupling agent surface modification, and slag powder with a mass ratio of 1:1:12. Everything else is the same as in Example 1.

[0085] A non-curing rubber asphalt waterproof coating S6 was prepared.

[0086] Example 7 This embodiment follows a similar process to Example 1. The difference is that the amount of composite filler used in this embodiment is controlled in the same way as in Example 1. However, the composite filler in this embodiment is a combination of hydrophobic modified nano-silica, nano-calcium carbonate with phthalate coupling agent surface modification, and slag powder with a mass ratio of 1:1.5:5. Everything else is the same as in Example 1.

[0087] A non-curing rubber asphalt waterproof coating S7 was prepared.

[0088] Comparative Example 1 This comparative example was carried out using a similar process to Example 1. The difference is that in this comparative example, the modifier DZ1 obtained in Preparation Example 5 was used to replace the modifier Z1 in Example 1.

[0089] Everything else is the same as in Example 1.

[0090] A non-curing rubber asphalt waterproof coating DS1 was prepared.

[0091] Comparative Example 2 This comparative example was conducted using a similar procedure to Example 1. The difference is that, in this comparative example, modifier DZ2 obtained in Preparation Example 6 was used in place of modifier Z1 in Example 1.

[0092] Everything else is the same as in Example 1.

[0093] A non-curing rubber asphalt waterproof coating DS2 was prepared.

[0094] Comparative Example 3 This comparative example was carried out using a similar procedure to Example 1. The difference is that in this comparative example, modifier DZ3 obtained in Preparation Example 7 was used in place of modifier Z1 in Example 1.

[0095] Everything else is the same as in Example 1.

[0096] A non-curing rubber asphalt waterproof coating DS3 was prepared.

[0097] Comparative Example 4 This comparative example was carried out using a similar procedure to Example 1. The difference is that in this comparative example, modifier DZ4 obtained in Preparation Example 8 was used in place of modifier Z1 in Example 1.

[0098] Everything else is the same as in Example 1.

[0099] A non-curing rubber asphalt waterproof coating DS4 was prepared.

[0100] Comparative Example 5 This comparative example was carried out using a similar procedure to Example 1. The difference is that in this comparative example, modifier DZ5 obtained in Preparation Example 9 was used in place of modifier Z1 in Example 1.

[0101] Everything else is the same as in Example 1.

[0102] A non-curing rubber asphalt waterproof coating DS5 was prepared.

[0103] Comparative Example 6 This comparative example follows a similar process to Example 1, except that talc powder is used to replace the slag powder in the composite filler in Example 1.

[0104] Everything else is the same as in Example 1.

[0105] A non-curing rubber asphalt waterproof coating DS6 was prepared.

[0106] Comparative Example 7 This comparative example follows a similar process to Example 1. The difference is that in this comparative example, quartz powder is used to replace the nano-calcium carbonate in Preparation Example A-2 by an equal mass to obtain quartz powder with phthalate coupling agent surface modification. Then, quartz powder with an equal mass is used to replace the nano-calcium carbonate with phthalate coupling agent surface modification in the composite filler in Example 1.

[0107] Everything else is the same as in Example 1.

[0108] A non-curing rubber asphalt waterproof coating DS7 was prepared.

[0109] Comparative Example 8 This comparative example follows a similar process to Example 1. The difference is that the amount of composite filler used in this comparative example is the same as in Example 1, but the composite filler is a combination of nano-calcium carbonate and slag powder with a phthalate coupling agent surface modified in a mass ratio of 1:2.77.

[0110] Everything else is the same as in Example 1.

[0111] A non-curing rubber asphalt waterproof coating DS8 was prepared.

[0112] Test case The performance of the coatings obtained in the above examples was tested, and the results are shown in Table 1. The test standard (method) for low-temperature flexibility is JC / T 2428-2017 Non-curing rubber asphalt waterproof coating; The test standard (method) for wet adhesion performance is JC / T 2428-2017 Non-curing rubber asphalt waterproof coating, and the test result is "100% cohesive failure"; The test standard (method) for 80℃ anti-sagging is C / T 2428-2017 Non-curing rubber asphalt waterproof coating, the test item is heat resistance, and the temperature is 80℃; The test standard (method) for xenon lamp aging performance is GB / T 18244-2000 "Test Method for Aging of Building Waterproofing Materials", with xenon lamp aging for 336 hours; Solid waste utilization rate (%) = (mass of white mud + mass of fly ash + mass of slag powder) / total mass of waterproof coating × 100% Table 1

[0113] As can be seen from the results in Table 1, the non-curing rubber asphalt waterproof coating provided by the present invention has excellent low-temperature bending properties, thermal aging performance, high-temperature anti-sagging properties and bonding strength, and significantly improves the utilization rate of solid waste and reduces costs.

[0114] 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 composition for a non-curing rubber asphalt waterproof coating, characterized in that, The composition contains asphalt I, SBS, SBR, composite filler, and modifier; Based on the total mass of the composition, the content of the asphalt is 40-70 wt%, the content of the SBS is 1.5-3 wt%, the content of the SBR is 1.5-3 wt%, the content of the composite filler is 25-45 wt%, and the content of the modifier is 5-10 wt%. The composite filler is a combination of nano-silica, nano-calcium carbonate and slag powder in a mass ratio of 1:0.5-2:2.5-12. The raw material composition A forming the modifier contains asphalt II, modified fiber, white mud, and fly ash; the modified fiber is fiber modified by a silane coupling agent; based on the total mass of the raw material composition A, the content of asphalt II is 50-70 wt%, the content of modified fiber is 0.1-0.3 wt%, the content of white mud is 15-35 wt%, and the content of fly ash is 10-18 wt%.

2. The composition according to claim 1, characterized in that, The composite filler is a combination of nano-silica, nano-calcium carbonate and slag powder in a mass ratio of 1:1-2:2.5-10. Preferably, the composite filler is a combination of nano-silica, nano-calcium carbonate and slag powder in a mass ratio of 1:1.2-1.8:3-8.

3. The composition according to claim 1 or 2, characterized in that, The average diameter of the nano-silica particles is 10-20 nm; And / or, the average particle diameter of the nano-calcium carbonate is 50-80 nm; And / or, the specific surface area of ​​the slag powder is 400-450 m². 2 / kg.

4. The composition according to claim 3, characterized in that, The nano-silica is hydrophobically modified nano-silica; And / or, the nano-calcium carbonate is nano-calcium carbonate surface-modified with phthalate coupling agent and / or aluminate coupling agent.

5. The composition according to claim 1 or 2, characterized in that, The asphalt I is a combination of 70# asphalt and 200# asphalt with a content-to-mass ratio of 1:3.5-12.

6. The composition according to claim 1 or 2, characterized in that, The modified fiber is selected from at least one of modified basalt fiber, modified glass fiber, and modified carbon fiber; And / or, the asphalt II is selected from at least one of 70# asphalt and 200# asphalt; And / or, the loss on ignition of the fly ash is ≤5%.

7. The composition according to claim 1 or 2, characterized in that, The modifier is prepared by a method comprising the following steps: mixing a raw material composition A containing asphalt II, modified fiber, white mud and fly ash.

8. A method for preparing a non-curing rubber asphalt waterproof coating, characterized in that, The method is carried out using the composition according to any one of claims 1-7, comprising: contact mixing a mixture containing the components of the composition of the non-curing rubber asphalt waterproof coating to obtain the non-curing rubber asphalt waterproof coating.

9. The non-curing rubber asphalt waterproof coating prepared by the method of claim 8.

10. The application of the non-curing rubber asphalt waterproof coating according to claim 9 in the field of building waterproofing.

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